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srep37147 (3) .pdf



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Título: A biodiversity hotspot losing its top predator: The challenge of jaguar conservation in the Atlantic Forest of South America
Autor: Agustin Paviolo

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www.nature.com/scientificreports

OPEN

received: 16 May 2016
accepted: 25 October 2016
Published: 16 November 2016

A biodiversity hotspot losing its top
predator: The challenge of jaguar
conservation in the Atlantic Forest
of South America
Agustin Paviolo1,2, Carlos De Angelo1,2, Katia M. P. M. B. Ferraz3,4, Ronaldo G. Morato4,5,
Julia Martinez Pardo1,2, Ana C. Srbek-Araujo6,7, Beatriz de Mello Beisiegel8, Fernando Lima9,10,
Denis Sana4,11, Marina Xavier da Silva12, Myriam C. Velázquez13, Laury Cullen9, Peter Crawshaw Jr5,
María Luisa S. P. Jorge14, Pedro M. Galetti15, Mario S. Di Bitetti1,2,16, Rogerio Cunha de Paula4,5,
Eduardo Eizirik4,17, T. Mitchell Aide18, Paula Cruz1,2, Miriam L. L. Perilli4,19, Andiara S. M. C. Souza15,
Verónica Quiroga1,2, Eduardo Nakano20, Fredy Ramírez Pinto13, Sixto Fernández13,
Sebastian Costa2,21, Edsel A. Moraes Jr22 & Fernando Azevedo4,23
The jaguar is the top predator of the Atlantic Forest (AF), which is a highly threatened biodiversity
hotspot that occurs in Brazil, Paraguay and Argentina. By combining data sets from 14 research groups
across the region, we determine the population status of the jaguar and propose a spatial prioritization
for conservation actions. About 85% of the jaguar’s habitat in the AF has been lost and only 7% remains
in good condition. Jaguars persist in around 2.8% of the region, and live in very low densities in most of
the areas. The population of jaguars in the AF is probably lower than 300 individuals scattered in small
sub-populations. We identified seven Jaguar Conservation Units (JCUs) and seven potential JCUs, and
only three of these areas may have ≥50 individuals. A connectivity analysis shows that most of the
JCUs are isolated. Habitat loss and fragmentation were the major causes for jaguar decline, but human
induced mortality is the main threat for the remaining population. We classified areas according to their
contribution to jaguar conservation and we recommend management actions for each of them. The
methodology in this study could be used for conservation planning of other carnivore species.

1

Instituto de Biología Subtropical, CONICET-Universidad Nacional de Misiones (UNaM), Bertoni 85, (N3370AIA)
Puerto Iguazú, Misiones, Argentina. 2Asociación Civil Centro de Investigaciones del Bosque Atlántico, Bertoni 85,
(N3370AIA) Puerto Iguazú, Misiones, Argentina. 3Departamento de Ciências Florestais, ESALQ, Universidade de São
Paulo, Piracicaba, SP, Brazil. 4Instituto Pró-Carnívoros Atibaia, Av. Horácio Neto, 1030 12954–010, Atibaia, SP, Brazil.
5
Centro Nacional de Pesquisa e Conservação de Mamíferos Carnívoros CENAP/ICMBio, Av. Hisaichi Takebayashi,
8600 12946–051, Atibaia, SP, Brazil. 6Programa de Pós-graduação em Ecologia de Ecossistemas, Universidade Vila
Velha (UVV), Vila Velha, ES, Brazil. 7Instituto SerraDiCal de Pesquisa e Conservação, Belo Horizonte, MG, Brazil.
8
Floresta Nacional de Capão Bonito/ICMBio, Capão Bonito, SP, Brazil. 9IPÊ - Instituto de Pesquisas Ecológicas,
Nazaré Paulista, SP, Brazil. 10Programa de Pós-graduação em Ecologia e Biodiversidade, Instituto de Biociências,
Universidade Estadual Paulista – UNESP, Rio Claro, SP, Brazil. 11PPG Ecologia- UFRGS, Porto Alegre, RS, Brazil.
12
Projeto Carnívoros do Iguaçu, Parque Nacional do Iguaçu/ICMBio, Rodovia BR 469 Km 22,5, Foz do Iguaçu, PR,
Brazil. 13Fundación Moisés Bertoni, Asunción, Paraguay. 14Vanderbilt University, Nashville, TN, United States.
15
Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil. 16Facultad
de Ciencias Forestales, Universidad Nacional de Misiones (UNaM), Misiones, Argentina. 17PUCRS, Faculdade de
Biociências, Porto Alegre, RS, Brazil. 18Department of Biology, University of Puerto Rico, San Juan, Puerto Rico.
19
Programa de Pós-graduação em Ecologia, Universidade Federal de Viçosa, MG, Brazil. 20Instituto de Pesquisas
Cananéia, Cananéia, SP, Brazil. 21Instituto nacional de Medicina Tropical, Puerto Iguazú, Argentina. 22Biotrópicos –
Instituto de Pesquisa, MG, Brazil. 23Departamento de Ciências Naturais - Universidade Federal de São João del
Rei. São João Del Rei, MG, Brazil. Correspondence and requests for materials should be addressed to A.P. (email:
paviolo4@gmail.com)
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Apex predators, particularly large carnivores, are key components of ecosystems as they help maintain biodiversity and ecological processes via multiple food web pathways1,2. These species require large areas of habitat with
a stable prey base for their long-term survival, and they are particularly susceptible to population declines in
human modified landscapes3. Human persecution, global habitat loss and fragmentation have exposed most species of large carnivores to extinction risk worldwide2. However, the impact of these threats varies across regions
and species2. While some populations of large carnivores in North America and Europe are recovering as forested
areas increase, along with protective legislation and greater human tolerance4,5, most large tropical carnivore
populations are still declining2,6.
Tropical forests sustain most of the global terrestrial biodiversity, but they have suffered high rates of deforestation and defaunation of large vertebrates7,8. Even though, the loss of top predators in these forests can have direct
effects on the diversity and function of these biologically diverse ecosystems7,2. The conservation of top predators
often is a challenge that requires large efforts to evaluate population status through extensive areas, and coordinated international efforts to develop conservation planning strategies2,6.
The Atlantic Forest (AF) of South America is one of the Earth’s Biodiversity Hotspots with high levels of diversity and endemism9.The AF extends through more than 1.7 million km2 across Brazil, Argentina and Paraguay,
and during the last centuries, it has undergone an intense landscape transformation. Today less than 12% of the
original forest cover still exists10. Due to the high levels of diversity and the extreme loss of forest cover, the region
is among the eight “hottest hotspot” of the world9 and is considered a top priority area by most of the largest
international NGOs (e.g. Word Wildlife Fund, Conservation International). Most of the remaining AF has lost its
largest mammals, including its top predator, the jaguar (Panthera onca; refs 11 and 12). If this trend continues, the
AF will be the first tropical forest ecoregion to lose its top predator13.
The jaguar is the top predator of the Neotropical region, currently occurring from southern United States to
northern Argentina. It has disappeared from about 54% of its original range, due to habitat loss, depletion of the
prey base and human persecution14. Although it is listed as near threatened by the IUCN6, it has become locally
extinct or critically endangered in some areas, including the AF, which is currently the southern distribution limit
of the species14–16.
Historically, the jaguar occurred throughout the AF14,16, but its’ current distribution has been greatly reduced.
Although many research teams have evaluated the population status of the jaguar in different regions or countries
within the AF15–21, no study has evaluated its’ status across the entire ecoregion. During the last 10 years, governments, scientists and NGOs developed conservation plans for the Argentinean AF22 and the Brazilian AF23,
but there is still no international conservation strategy for the entire region. Saving the jaguar population in the
AF requires a better understanding of its status throughout the entire region, as well as international planning
and cooperation for conservation24. This article addresses this limitation by combining data sets from 14 jaguar
research projects from across the AF to: (i) evaluate current jaguar habitat availability, (ii) estimate the area of
occupancy and population size, (iii) identify potential connectivity cost among subpopulations, (iv) identify the
main threats to jaguar conservation in the region, (v) propose integrated actions for long-term conservation, and
(vi) use our study as a model to assist conservation efforts of jaguars and other large carnivores in other regions
facing similar conservation problems.

Results

Habitat suitability for jaguars and areas of occupancy.  Of the original 1.7 million km2 of the AF,
15.1% was classified as habitat currently suitable for jaguars, but only 0.7% (9,017 km2) occurred in areas classified
as highly suitable (Fig. 1). The remainder of suitable habitat was classified as medium suitability (6%; 81,473 km2),
or marginal suitability (8.4%; 114,860 km2). Jaguar habitat loss varied among countries: Brazil lost 87% of its’
original AF suitable habitat, Paraguay 64% and Argentina 39%. Of the total remaining jaguar suitable habitat in
the AF, 27% is fragmented into 12,608 patches smaller than 100 km2, 43% into 305 fragments of between 100 km2
and 1,000 km2, and 29% into 35 patches larger than 1,000 km2.
The habitat suitability model for jaguar that we developed for these estimations was highly significant
(p <​ 0.001, area under the receiver operating characteristic: AUC =​  0.82  ±​ 0.05) and presented low omission
error (~22%). The post-hoc validation using the independent recent presence-only records confirmed that the
model was highly accurate, with only 5.1% omission error. According to our model, jaguar habitat in the AF was
mainly determined by high forest cover and marshlands (53.1%), intermediate elevation (19.4%) and low human
accessibility (17.3%).
Jaguar presence was confirmed in only a few areas of the AF (Fig. 2). In the coastal region of Brazil, the species
is apparently extinct in the southern and northern extremes, with populations currently confined to the states of
São Paulo, Rio de Janeiro and Espírito Santo. In the interior portion of the AF, the species occurs in the state of
Minas Gerais and along the Paraná River basin, in habitat fragments in Argentina, Paraguay and Brazil (Fig. 2).
We estimated that the area of jaguar occupancy (AJO) in the AF covers only 35,441 km2. If we include as AJO
the areas with jaguar records nearby (closer than 1.7 km), the AJO increases to 37,825 km2. Thus, the jaguar is
occupying only 2.8% of the AF and 18.4% of the current jaguar suitable habitat. In addition, 16,420 km2 of jaguar
habitat (1.2% of the AF and 8% of the total current jaguar suitable habitat) were very close to AJOs and are areas
of potential jaguar occupancy (APJO, Fig. 2). In 151,105 km2 (73.6%) of available jaguar habitat in the AF we do
not have jaguar records, most probably representing areas without jaguars (Fig. 2).
The AJOs were mainly the largest patches of remaining habitat. Jaguars appear to have disappeared from 96%
of the habitat fragments with less than 100 km2, 86% of the habitat fragments between 100 km2 and 1,000 km2, and
40% of the habitat fragments larger than 1,000 km2.
Jaguar density and population size.  Jaguars were not detected in eight of the 30 camera-trap surveys
conducted in the AF (Table 1). These surveys without jaguar records were conducted in the AJO of the Serra do
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Figure 1.  Habitat suitability for jaguars in the Atlantic Forest. The colored area inside the left corner inset
details the location of the study area in South America. The map was created with ArcGis 10.3 (www.arcgis.
com).

Mar, Serra do Mar do Norte and Serra dos Órgãos (Supplementary Fig. S1 and Table S1). In 13 other surveys, the
number of individuals recorded was insufficient to apply spatially explicit capture-recapture population models
(SECR) to estimate jaguar density (Table 1). We estimated densities based on data from nine surveys from six
areas. In these surveys, we recorded between eight and 42 individuals and estimated densities between 0.66 and
2.42 jaguars/100 km2 (Table 1). The highest density estimates were obtained in the Linhares-Sooretama region
and in the Morro do Diabo State Park, and the lowest were from a forest block including the Intervales State Park
and Alto Ribeira State Touristic Park (Table 1, see also Supplementary Fig. S1).
The estimated number of jaguars for each region varied according to density estimates and the size of habitat fragments that were surveyed (Table 2). The largest subpopulations occurred in the Green Corridor, the
Upper Parana-Paranapanema and the Serra do Mar region (Table 2). Smaller subpopulations, were located in the
Mbaracayú and Linhares-Sooretama regions (Table 2).

Priority areas for jaguar conservation.  We identified seven areas with presence of males and females

that were categorized as Jaguar Conservation Units (JCU) and five Potential Jaguar Conservation Units (PJCU;
no detection of both sexes). Three JCUs contained, or probably contained 50 individuals or more and were categorized as JCU Type I (JCUs with higher probability of long-term population persistence): the Green Corridor,
the Upper Parana-Paranapanema, and the Serra do Mar regions (Table 2, Fig. 3). These three JCU were all larger
than 5,000 km2. While the population of the Serra do Mar JCU was probably smaller than 50 individuals, we classified it as a Type I JCU because the habitat availability of the area is large enough to maintain a larger population
(Table 2). These three JCUs together constitute more than 60% of the current priority areas for jaguar conservation in the AF (Table 2).

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Figure 2.  Jaguar records obtained along the AF and the areas of jaguar occupancy (AJO), the areas of
potential jaguar occupancy (APJO) and the distribution of available jaguar habitat in the Atlantic Forest.
The map was created with ArcGis 10.3 (www.arcgis.com).

The other four JCU are smaller and probably contain less than 50 individuals each consequently were classified as JCU Type II. These JCUs varied in terms of size, density and habitat conditions (Table 2). The largest is
Mbaracayú, in eastern Paraguay, which encompasses 4,086 km2 of jaguar habitat. The other three vary between
503 km2 and 3,915 km2 and are located in Minas Gerais State and the coastal region of Brazil (Fig. 3). These Type
II JCUs cover 18% of the priority areas for jaguar conservation in the AF (Table 2).
We identified five PJCUs in western Paraguay and the Brazilian coast (Fig. 3). The size of the PJCUs varied
between 539 km2 and 2,941 km2, and together they constitute 16% of the priority area for jaguar conservation
in the AF (Table 2). Despite the presence of jaguars in these PJCUs, jaguar records were scarce and densities are
apparently very low (Table 1). Small fragments with jaguar presence were spread across different areas of the
AF and constitute a very small fraction of the jaguar habitat (Table 2). Records in these areas are occasional and
probably of nonresident individuals.
Several areas where jaguar were not detected could be important for jaguar conservation in the future because
they are large areas with good quality jaguar habitat. Two of these areas are located near the Green Corridor JCU
and the Serra do Mar JCU, and if they were connected they could expand the size of these existing JCUs (Fig. 4).
We also identified potential core areas that may sustain jaguar’s subpopulations in the future, and are potential
areas for reintroduction programs. These areas are located in the northern part of the AF (Bahia and Piauí states
of Brazil), along the coast of Paraná and Santa Catarina states (Brazil), and in western Paraguay (Fig. 4). These
areas varied between 232 and 1,072 km2 and together cover 12,218 km2 of potential core areas.

Potential connectivity among the Jaguar Conservation Units.  The relative cost (i.e., costs for a
jaguar attempting to move between two JCUs) or potential connectivity among the JCUs was highly variable.
The Linhares-Sooretama and Rio Doce JCUs showed the highest connectivity cost and isolation of all the JCUs
(Supplementary Table S2). Other JCUs and PJCUs could be grouped into two main regions: the Upper Paraná
Atlantic Forest-JCUs, in the West, and the Coastal Atlantic Forest-JCUs, in the East (Supplementary Table S2).
Connectivity between these two regions appears to have excessively high cost to allow jaguar movements
(Supplementary Table S2). Furthermore, the Upper Paraná Atlantic Forest-JCUs showed higher cost distance
values, suggesting more isolation, whereas the Coastal Atlantic Forest-JCUs present lower values and thus higher
potential of connectivity (Supplementary Table S2).
Jaguar threats.  The relative importance of threats varied among the different JCUs (Table 2). Ranked in
order of importance, the threats included poaching, scarcity of prey, small population size, site isolation, human
retaliation due to cattle predation, habitat loss, and road kills.

Discussion

The population status of the jaguar in the AF is critical. Habitat loss and fragmentation have had a tremendous
impact, and the species is locally extinct in most of the region. The few remaining subpopulations are small, scattered, highly isolated, and associated with relatively large forest remnants. This dramatic situation is similar to that
faced by endangered large carnivore species in other regions of the World2.
Considering that a couple of centuries ago the species inhabited all the AF14,16, we found that approximately
85% of the jaguar habitat has been lost, and less than 7% of the region has medium to highly suitable habitat.
Clearly, habitat loss has been the major driver of jaguar population decline in the AF, as was previously described
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Stations

Trap days

Jaguar records/100
camera trap days

Morombí PR I

5

918

Morombí PR II

10

930

Mbaracayú

25

1844

Survey

Individuals

Density (95% CI)
jaguars/100 km2

0.11

1 (1 u)

NE

0.75

4 (1 m, 3 u)

NE

2.87

8 (3 f, 2 m, 3 u)

1.29* (1.29 to 2.8)
NE

Urugua-í

53

2611

0.11

1 (m)

PN Iguazú

46

2942

0.58

6 (3 f, 2 m, 1 u)

NE

Yabotí

60

2676

0.15

1 (m)

NE

Iguazú-San Jorge

49

2287

1.92

13 (6 f, 4 m, 1 u, 2c)

1.2 (0.56 to 1.89)

Iguazú-Urugua-í

47

2327

2.15

16 (8 f, 8 m)

0.89 (0.58 to 1.24)

PN do Iguaçu I

36

3240

0.21

3 (2 h,1 u)

NE

Green Corridor I

80

5038

1.47

21 (10 f, 7 m, 2 u, 2c)

0.91 (0.61 to 1.22)

PN do Iguaçu II

34

3060

0.75

4 (2 h, 2 m)

NE

Green Corridor II

122

5297

3.51

42 (18 f, 12 m, 1 u, 10c)

1.07 (0.8 to 1.33)

Morro do Diabo

36

1440

5.41

10 (6 f, 4 m)

2.39 (2.31 to 2.57)

Ivinhema

13

1495

2.07

12 (8 f, 3 m, 1 u)

1.66 (0.76 to 2.55)

Vale NR I

30

3032

2.74

8 (4 f, 3 m, 1 u)

2.42 (2.01 to 3.26)

Vale NR II

10

3468

0.09

3 (3 f)

NE

Vale NR III

10

3034

0.07

2 (1 m, 1 u)

NE

Vale NR IV

8

1033

3.1

4 (1 f, 3 m)

NE

Vale NR V

30

1440

1.67

2 (2 m)

NE

Carlos Botelho

16

2170

0.23

4 (1 f, 3 u)

NE

Intervales

14

1497

1.94

4 (2 f, 2 m)

NE

Intervales-PETAR

24

2712

1.25

8 (3 f, 3 m, 2 u)

0.66 (0.29 to 1.17)

Juréia-Itatins

21

2483

0

0

NE

Ilha do Cardoso

8

744

0

0

NE

Serra da Bocaina

26

3054

0

0

NE

Santa Virginia

26

2512

0

0

NE

Serra dos Órgãos I

18

1354

0

0

NE

Serra dos Órgãos II

20

6624

0

0

NE

Serra dos Órgãos III

44

4597

0

0

NE

Serra dos Órgãos IV

48

4788

0

0

NE

Table 1.  Information of the camera-trap surveys in the Atlantic Forest including number of stations,
effort in camera-trap days, rate of records of jaguars, number of individuals recorded (age and sex),
density estimate and its 95% confident interval (95%CI). Abbreviations: (u) adult jaguar of undetermined
sex, (m) adult male, (f) adult female, (c) cub and (NE) not estimated due to scarcity of records. *Estimated with
CAPTURE +​ information of the home range size of three individuals monitored with GPS collars in this area.
The number of stations, the effort, the jaguar record rate and the number of individuals correspond to values of
the total sampling effort developed in every survey. The density estimation and its 95% CI correspond to values
obtained during the portion of the survey that was used to estimate these parameters.
for regions within the AF11,12,16,25. Our model shows that loss of forest cover and marshlands, and increases in
human accessibility had a negative effect on jaguar habitat suitability in the AF. These changes were related to
demographic and economic processes that affected Brazil, Paraguay and Argentina at different times and different degrees26. Most of the jaguar habitat in the Brazilian AF was probably lost between 1900 and 1980 due to the
development of cities and large-scale agriculture10. In Paraguay, the loss of jaguar habitat mostly occurred during
the last 30 years with the expansion of large-scale agriculture27. In Argentina, there has been less deforestation and
degradation, and a larger proportion of the original habitat remains26.
We estimate that less than 27% of the suitable jaguar habitat of the AF contains jaguars. Although the species
occurs in some relatively small and medium-size fragments, jaguars are mainly present in fragments larger than
1,000 km2. Habitat fragmentation can produce a large impact on the persistence of carnivores3,28,29. Only large
areas of suitable habitat can sustain jaguar populations that are resilient to stochastic events29. According to our
results, more than 70% of the habitat in the AF is fragmented into small remnants that cannot sustain more than
10 individuals at current densities. Jaguar subpopulations in these small fragments have a high probability of
becoming extinct in a short period of time29,30, and have already been shown to lose genetic diversity at a very
high rate31. Therefore, it is probable that habitat loss and fragmentation were, in an interaction with poaching and
scarcity of prey, the main causes of local jaguar extinctions and large areas of empty suitable habitat.
The absence of records and the low rate of jaguar pictures in many camera-trap surveys of the AF suggest that
several remnant subpopulations occur at very low densities. This is worrying given that most of these surveys
were conducted in large forest areas of good jaguar habitat (e.g. protected areas), suggesting that population
decline and local extinction are not only occurring in small fragments because habitat loss and fragmentation,

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Name

Green Corridor

Upper Parana-Paranapanema

Serra do Mar

Mbaracayu

Linhares-Sooretama

Rio Doce

Type

JCU Type I

JCU Type I

JCU Type I

JCU Type II

JCU Type II

JCU Type II

Total area
(km2)

14535

6724

13547

4086

503

1407

AJO
(km2)

13430

5343

7315

2643

503

1113

APJO
(km2)

1105

1380

6232

1443

0

294

% AJO surveyed
Population in Main threats to
Main management
with camera-traps surveyed areas jaguar population recommendation

62%

49%

32%

48%

79%

0

Jaguar poaching,
Kill of jaguars
for conflicts with
cattle, Road kills

Reduce all sources
of jaguar mortality
and poaching of
prey. Maintain
the connectivity
between their
two main habitat
blocks. Evaluate
connectivity with
Itaipu and San Rafael
PJCUs. Monitor
jaguar population.

47 (26–67)

Kill of jaguars
for conflicts with
cattle, Jaguar
poaching, Small
and isolated area

Reduce all sources
of jaguar mortality
and the conflict
with livestock
owners. Improve
connectivity of their
three main habitat
blocks. Evaluate
connectivity with
Mbaracayu JCU,
Itaipu PJCU and the
Pantanal. Monitor
jaguar population.

14 (6–24)

Reduce all sources
of jaguar mortality.
Stop poaching of
prey and palm
harvest. Maintain
connectivity among
its main habitat
Scarcity of prey,
blocks. Confirm
Jaguar poaching,
Habitat conversion jaguar presence
in the APJO areas
and monitor jaguar
population. Improve
the connectivity
with the Serra do
Mar Norte JCU.

12 (8–18)

Jaguar poaching,
Small and isolated
area, Scarcity of
preys

Reduce all sources
of jaguar mortality
and poaching of
prey. Reduce habitat
loss and maintain
connectivity among
its main habitat
blocks. Evaluate
connectivity with
Upper ParanaParanapanema JCU,
Itaipu PJCU and the
Pantanal. Monitor
jaguar population.

Small and isolated
area, Scarcity of
prey, Road kills

Reduce all sources
of jaguar mortality
and poaching of
prey. Evaluate the
supplementation of
individuals. Monitor
jaguar population
with emphasis in the
genetic diversity.

52 (38–64)

10 (9–14)

NA

Reduce all sources
jaguar mortality
and the conflict
with livestock
owners. Evaluate
Small and isolated
jaguar population
area, Kill of jaguars
including genetic
for conflicts with
diversity. Evaluate
cattle, Scarcity of
the supplementation
preys
of individuals.
Evaluate potential
connectivity with
Cerrado jaguar
population.

Continued

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Name

Serra do Mar Norte

San Rafael

Itaipu

Serra dos Órgãos

Itatiaia

Campos do Jordão

Type

JCU Type II

PJCU

PJCU

PJCU

PJCU

PJCU

Total area
(km2)

3915

2941

2258

1578

1336

539

AJO
(km2)

1006

1958

1460

827

1000

536

APJO
(km2)

2908

983

798

751

336

3

% AJO surveyed
Population in Main threats to
Main management
with camera-traps surveyed areas jaguar population recommendation

3%

0

0

47%

0

0

NA

Reduce all sources
jaguar mortality
and poaching of
prey. Improve
habitat connectivity
with Serra de Mar
Scarcity of prey,
JCU and neighbor
Jaguar poaching,
Habitat conversion PJCU. Evaluate
jaguar populations
including genetic
diversity. Evaluate
the supplementation
of individuals.

NA

Unknown

Evaluate the status
of the population. If
a jaguar population
exists, reduce all
sources jaguar
mortality. Evaluate
its main threats and
habitat connectivity
with Green Corridor
and Mbaracayu
JCUs.

Unknown

Evaluate the status
of the population.
If a jaguar
population exists,
reduce all sources
jaguar mortality.
Evaluate its main
threats and habitat
connectivity with
Green Corridor,
Upper ParanaParanapanema and
Mbaracayu JCUs

Unknown

Evaluate the status
of the population. If
a jaguar population
exists, reduce all
sources jaguar
mortality, and
evaluate its main
threats. Evaluate
habitat connectivity
with Serra do Mar
Norte JCUs

Unknown

Evaluate the status
of the population. If
a jaguar population
exists, reduce all
sources jaguar
mortality, and
evaluate its main
threats. Evaluate
habitat connectivity
with Serra do Mar
Norte JCU and
Campos do Jordao
PJCU

Unknown

Evaluate the status
of the population. If
a jaguar population
exists, reduce all
sources jaguar
mortality, and
evaluate its main
threats. Evaluate
habitat connectivity
with Serra do Mar
Norte JCU and
Itatiaia PJCU

NA

NA

NA

NA

Continued

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Name

Small fragments

Type

Small
fragment

Total

Total area
(km2)

877

54,245

AJO
(km2)

690

APJO
(km2)

187

37,825 16,420

% AJO surveyed
Population in Main threats to
Main management
with camera-traps surveyed areas jaguar population recommendation

0

NA

41%

135 (87 to 187)

Very small areas

Areas too small to
maintain jaguar
populations. Reduce
jaguar mortality
threats. Evaluate
connectivity with
a JCU. Studies
related with jaguar
movements in
human dominated
matrix are
recommended

Table 2.  Information of the priority areas for jaguar conservation in the Atlantic Forest including name,
type, total area, area of jaguar occupancy (AJO), area of potential jaguar occupancy (APJO), percentage of
the AJO that was surveyed with camera traps, population estimate of this surveys using population models,
main threats to jaguars and management recommendation for jaguar conservation.

Figure 3.  Distribution of the Jaguar Conservation Units (JCU), the Potential Jaguar Conservation
Units (PJCU) and the small fragments with jaguar presence. References: (1) Green Corridor, (2) Upper
Parana-Paranapanema, (3) Serra do Mar, (4) Mbaracayú, (5) Serra do Mar Norte, (6) Rio Doce, (7) LinharesSooretama, (8) San Rafael, (9) Itaipú, (10) Serra dos Órgãos, (11) Itatiaia, (12) Campos do Jordao, (13) East
Paraguay, (14) Das Perobas Reserve, (15) Rio Tiete-West SP, (16) PE Serra do Brigadeiro, (17) Mantiqueira and
(18) Espinhaço. The map was created with ArcGis 10.3 (www.arcgis.com).

but also in larger and more connected habitat fragments. The few areas where we recorded several individuals and
could estimate densities, in general, were well-managed protected areas with relatively low poaching pressure20,21.
Poaching can reduce jaguar densities in the AF even in areas of good habitat quality20. Illegal hunting is widespread in the AF and is responsible for the frequent poaching of jaguars20,32 and the depletion of their prey base33–36.
Jaguar killing in the AF is frequent, mainly by poachers that consider the species a trophy or by cattle ranchers
that eliminate individuals as retaliation for livestock losses20,32,37. Large home range requirements of carnivores
often expose them to the edges of protected areas, where they are in contact with human activities and are susceptible to high levels of human-induced mortality3. This “edge effect” could drive important changes in abundance
inside the protected areas and increase the effect of habitat fragmentation3,38,39. Jaguar roadkill is also a threat in
the AF, where the protected areas are adjacent to or crossed by roads or highways40. Road-killed jaguars have been
recorded in protected areas of the AF, and thus, roads emerge as an additional threat for the species40.
The jaguar population of the AF is small and severely fragmented into a few subpopulations that we defined as
Jaguar Conservation Units. As we have not completely surveyed any of the JCU, we do not have the exact population size of them. Considering that most of the camera-traps surveys were conducted in areas with high habitat
quality within protected areas20,21, it is highly probable that the density in the other areas are much lower. The low
rate of jaguar records (track, feces, sightings, etc.) found in these areas in our and other studies15,41 support this
hypothesis. Considering this and the extent of the AJO, it is probably that all the JCUs Type II have less than 25
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Figure 4.  Other important areas for jaguar conservation in the Atlantic Forest. Potential core areas may be
considered as potential areas to reintroduce the species to create new subpopulations. Potential expansion areas
may be considered to enlarge JCU, PJCU and Potential core areas. The map was created with ArcGis 10.3 (www.
arcgis.com).
animals each, that none of the JCU Type I have more than 85 individuals, and that the total population of the AF
is roughly estimated to be in the range of between 150 and 300 individuals (Table 2, Fig. 5).
Previous population viability analysis of jaguars estimate that populations with 50 individuals may persist in
the medium-long term (100 years) if mortality is low30,42, while populations with fewer than 25 individuals have
low probabilities of surviving for 100 years30,42. However, if the carrying capacity of a population is relatively high
(e.g. large protected habitat with high prey populations), the chances of surviving increase considerably30,42. If we
consider our highest density estimates as the potential carrying capacity for the AF, most of the JCUs are far below
their carrying capacity. These subpopulations have the potential to increase in size and viability if protection is
enforced and their numbers and those of their prey are allowed to increase. Currently, their small population
size and isolation from other fragments have already resulted in loss of genetic diversity and likely decreased
evolutionary potential31,43, implying that additional measures (e.g. restoration of connectivity to other areas or
supplementation of individuals) will be needed for long-term persistence (Table 2, Fig. 6).
In contrast to other large carnivores with higher reproductive potential (e.g. leopards, pumas, tigers), jaguar populations cannot support even intermediate levels of harvest, and they decline rapidly when mortality is high42,29. In
this scenario, reducing jaguar mortality appears to be the most important action to conserve jaguars in AF (Table 2,
Fig. 6). Poaching must be reduced by increasing support for law enforcement, but also by developing high-impact
education and communication campaigns20, as well as by implementing sustainable alternatives of living for communities neighboring protected areas. Reducing illegal hunting will not only reduce jaguar killing, but it will also increase
its’ prey base and the carrying capacity of forest fragments. In addition, the loss of jaguars in retaliation to predation
on livestock must be reduced through proactive policies from governmental agencies. For the smallest populations,
periodic arrivals or supplementation of individuals could increase the probability of persistence30, and this must be
considered as a viable alternative if we want these populations to persist in the long term (Table 2, Fig. 6).

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Figure 5.  Methodology used to estimate the distribution and size of the subpopulations and the population
size of jaguars in the Atlantic Forest. The same methodology could be used to evaluate the populations status
of other carnivore species. The authors created this figure.
Enhancing landscape connectivity is a key strategy of modern biodiversity conservation worldwide44. Our
results show that the potential connectivity between JCUs is highly variable. The high cost and long distances
between the JCUs in the Upper Parana Atlantic Forest will be a challenge for creating successful corridors. In this
region, the role of the Itaipu PJCU is crucial, acting as a potential stepping-stone between the Green Corridor, the
Upper Parana-Paranapanema and Mbaracayú JCUs (Fig. 3 and Supplementary Table S2). These last two JCUs could
also play a very important role as a connection between the Atlantic Forest and Pantanal jaguar populations44.
The Coastal Atlantic Forest JCUs show higher potential for connection. Hence, it will be more effective to promote corridors as a management policy in this area. In contrast, the high cost distance value of Rio Doce and
Linhares-Sooretama JCUs suggests that they are highly isolated from the rest of the JCUs and that the chances of
arrival of jaguars via natural dispersal will be extremely low. Furthermore, it seems quite difficult to implement
natural functional corridors between the Upper Parana Atlantic Forest JCUs and Coastal Atlantic Forest JCUs
since the cost-distance value is very high. In this scenario, we will need to develop an active management strategy
including carefully planned and monitored translocation or supplementation of individuals to reinforce some
jaguar populations and maintain their genetic diversity (Table 2 and ref. 43).
This study is the results of a collaborative effort among scientist of different countries to save the top predator
of the AF. By joining sparse data and using different analytical techniques, we evaluated the size and distribution
of AF´s jaguar subpopulations (Fig. 5). Using a combination of new and previous14,45 approaches, we defined
the priority areas to conserve the species and proposed spatially explicit conservation actions (Fig. 6). This
step-by-step process was an efficient way to transform basic information into management recommendations,
and could be applied to jaguar populations in other regions, or other species of large carnivores.
Our work can be considered as the first step to understand the general population status of jaguars in the
whole AF and guide priority conservation actions. However, this effort must be continued to improve our knowledge, cover existing information gaps and refine the conservation strategies. In the near future, population surveys in the AF should focus on exploring areas where jaguar presence was not confirmed (APJO and large high
quality habitat patches identified by our model), regularly monitoring jaguar population size of the JCUs (including the evaluation of unsurveyed areas of the JCU) and its genetic diversity. In addition, it is crucial to understand
how the jaguars move in this fragmented landscape, evaluating the feasibility and effectiveness of the establishment of corridors and techniques for supplementation or translocation of individuals (Table 2). Finally, it is also
necessary to evaluate the best ways to reduce the human induced mortality of jaguars by analyzing alternatives to
solve jaguar-cattle rancher conflicts, and to reduce poaching and the impact of roads.
The extinction of jaguars in the AF could have important consequences13. In the absence of jaguars, it is
expected that populations of other species and many processes will change with unpredictable consequences for
the ecosystem1,2. To protect and increase the jaguar populations and the natural areas that they depend on, constitute an enormous challenge for the next decades, but there are reasons for hope. Our population estimates for the
Green Corridor (Table 1) suggest that this subpopulation is increasing after a marked decline in the 1990’s20, probably as a result of efforts of governmental institutions and NGOs in combating poaching and other threats. The
survivorship of small and presumably isolated subpopulations in the Morro do Diabo and Linhares-Sooretama
areas during the last decades also brings hope, in spite of their documented loss of genetic diversity31,40. Finally,
the increasing collaboration among institutions of Brazil, Paraguay and Argentina to coordinate and develop
transnational actions to study, monitor and conserve the species is also an asset.

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Figure 6.  Methodology used to define the important areas for conservation of the species and management
recommendations for each area. The same methodology could be used for conservation planning of other
carnivore species. The authors created this figure.

During the last decades, a large amount of scientific evidence demonstrated the importance of large carnivores as key parts of ecosystems1,2. However, the survival of these species is still a challenge, especially in tropical
ecosystems. Following the creation of the Large Carnivore Initiative for Europe Specialist Group for the IUCN,
Ripple et al.2 proposed the creation of a Global Large Carnivore Initiative to maintain and restore, in coexistence

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with people, viable populations of large carnivores as an integral part of ecosystems and landscapes. We agree
with this vision, and propose to put special attention and effort in the most threatened regions and ecosystems
of the World. In this context, special attention must be given to the continued challenge of conserving the jaguar
population of the Atlantic Forest.

Methods

Habitat suitability for jaguars.  To evaluate the size and location of the remaining suitable areas for jaguars
in the AF, we developed a species distribution model. We gathered 2,179 jaguar presence points (Fig. 2) collected
in the region between 2003 and 2014 by 14 teams researchers and its collaborators involving more than 300 hundred people. Jaguar records correspond to camera-trap pictures, locations of collared individuals, poached or
road-killed animals, sightings and jaguar confirmed tracks and feces obtained in systematic and non-systematic
surveys (Supplementary material Methods S1). To reduce the spatial correlation among records from this dataset
(e.g. many records corresponding to the same individual), we divided the study area in cells of the size of a female
jaguar potential home range in the AF (144 km2), the smallest range of an individual of the species in region11, and
randomly selected only one presence point from each cell11,16,46. The resulting 72 presence records that remained
were partitioned randomly into training (70%) and testing (30%) datasets for cross-validation with replacement
(n =​  10).
We selected six non-correlated (Pearson’s r <​ 0.70) environmental and anthropogenic variables as predictors,
from an initial set of 18 variables (Supplementary Table S3) that explained jaguar distribution in previous studies
performed in the region11,12,16,25. The final variables were: human accessibility cost, % of natural habitats (native
forest cover and marshlands), % of pastures, human population density, distance to rivers, and elevation. Because
the characteristics of the species and the methodologies used in our surveys prevented obtaining locations of
true absences, we chose the Maxent algorithm (Maxent 3.3.3 k) for running species distribution models47,48. As
model parameters, we used a convergence threshold of 10−​5 with 500 iterations, 10,000 background points, auto
features, random seed, analysis of variable importance and response curves48.
The logistic output resulted in an average model with values ranging from 0 (unsuitable) to 1 (suitable)47. We
set the ‘maximum test sensitivity plus specificity’ (0.364) as a decision threshold rule49 making the distinction
between suitable (≥​0.364) and unsuitable (≤​0.364) areas. Then, we reclassified the final model in four classes
with equal intervals, but adjusting the first value 0.250 to the threshold of 0.364. Final models resulted in: unsuitable (0 to 0.364), and the suitable habitat divided in marginal (0.364 to 0.5), medium (0.5 to 0.75) and highly
suitable (0.75 to 1) areas for jaguars.
We evaluated the final model by the area under the receiver operating characteristic curve (AUC) value, a
threshold-independent measure of overall model performance (mean ±​ standard deviation; ref. 50). The AUC
ranges from 0 to 1, assuming that AUC ≥​ 0.75 is a high score51. We also evaluated omission errors and model significance by binomial probability associated to the threshold used52. Finally, after the conclusion of the modeling
analysis, we gathered new records from the field (n =​ 107, Supplementary material Methods S1), which we decide
to use as an independent dataset to further test the model’s predictive ability for jaguar occurrence in the AF.
Estimation of areas of jaguar occupancy.  To identify the fragments of habitat with jaguar occupancy
along the AF (as used by the IUCN to assess species status), suitable habitat areas obtained in the final model were
converted to polygons, splitting the resulting habitat fragments by main and secondary roads. We overlaid all the
jaguar occurrence points onto suitable habitat remnants, selecting those with confirmed jaguar presence. As some
occurrence points were located outside the suitable habitat fragments, we calculated the median distance from
these points to the closest habitat fragment (1.7 km). This value can be interpreted as the distance that jaguars
usually reach when they move outside the suitable habitat. Therefore, to be conservative, we only considered as
area of jaguar occupancy (AJO) every fragment of continuous suitable habitat containing jaguar records and
those that had a jaguar record closer than 1.7 km (Fig. 5). Additionally, we considered as areas of potential jaguar
occupancy (APJO) those fragments without jaguar records inside or near them, but that were closer than 1.7 km
to an occupied fragment of suitable habitat (Fig. 5).
Estimation of jaguar abundance, density and population size.  To estimate relative abundance and

density, we compiled jaguar records from 30 camera-trap surveys conducted between 2003 and 2014 (Table 1,
see also Supplementary Fig. S1 and Table S1). Most of the surveys were specifically designed to evaluate jaguar
abundance and were performed by our own teams, but we also included information from surveys conducted
by other collaborators (17% of the surveys). The surveys covered portions of most of the largest fragments of
remaining jaguar habitat in the AF, including areas with different levels of human activity and legal protection
(Supplementary Fig. S1 and Table S1).
The surveys varied widely in terms of effort, distance among cameras-trap stations and area covered, and
jointly they accumulated more than 80,000 camera-trap days from more than 900 different stations located in
jaguar suitable habitat (Table 1, Supplementary Table S1). In general, camera-traps were deployed in pairs, facing
each other along roads, trails or inside the forest, trying to cover places regularly used by jaguars. We used photographs to identify individual jaguars through their unique spotting pattern, and the sex and age by the presence
or absence of scrotum and corporal build. For density estimation we only used data of perceived adult animals.
Surveys with relatively few jaguar records (<​6 individuals) were only used to estimate jaguar photographic rate
and to confirm the presence of females in the area.
We estimated jaguar densities through spatially explicit capture-recapture population models (SECR) that
combine capture-recapture records with their geographic location53,54. These models have been used previously
to estimate jaguar density55–57, and simulations studies show that they generate the less biased density estimations

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in a wide range of conditions in relation to different sizes of areas covered by cameras and jaguar home range
sizes57. To apply the SECR models, we used the Bayesian approach and Markov chain Monte Carlo simulations
through the R package SPACECAP 1.1.054,58,59. A detailed description of the procedures and parameters employed
to estimate density is provided in Supplementary material Methods S2.
The lack of records of jaguar individuals at different stations in the Mbaracayu survey precluded the use of
SECR models in this area. We thus estimated its jaguar density using non-spatial capture-recapture models in
combination with information of the estimated home range size of the animals20,60 and using the jackknife estimator of abundance in the program CAPTURE261. The effectively sampled area was estimated by applying to
every camera-trap station a buffer equal to the radius of the mean home range of three animals monitored by GPS
collars in this area (5.8 km; Ramirez et al., unpublished results). The resultant polygons around each camera were
merged into one polygon that was considered the sampled area20,55.
To obtain the population size, in areas where we obtained density estimates with camera traps and population models, we used the NSuper parameter obtained in SECR analysis as the number of animals present in the
surveyed area (Fig. 5). We also used 95% confidence interval limits as the minimum and maximum number of
individuals living in each area.

Identifying priority areas for jaguar conservation.  We identified priority areas for jaguar conserva-

tion, defined as Jaguar Conservation Units, as those containing a jaguar population and suitable habitat. This
approach was originally proposed by Sanderson et al.14, and has been used widely to update and redefine the
JCUs originally proposed (e.g., refs 11,45, 62 and 63). In our work, we defined JCUs as those habitat units with
confirmed presence of females and males as a proxy for existing reproductive populations (Table 1 and Fig. 6).
We classified these JCUs into two categories, according to the known number of adult individuals present: Type
I JCUs were areas with an estimated population size of ≥​50 adults and Type II JCUs were areas with <​50 adults
(Fig. 6 and ref. 14).
To identify habitat units that can potentially constitute JCUs, we focused on the areas of jaguar occupancy
and potential occupancy, and grouped them into those that were less than 15 km from a fragment with jaguar
presence. This distance is the radius of the largest home range estimated for jaguar in the AF (Morato et al. unpublished results), and could be considered as a distance that is not usually traveled by resident jaguar individuals
outside suitable habitat. One exception in this grouping procedure was Morro do Diabo State Park (Brazil) that
was included in the Upper Parana-Paranapanema JCU. This fragment was more than 15 km apart from the other
fragments of this Unit, but historical and political issues determine the feasibility of the development of a common conservation strategy and management actions with the rest of this JCU.
In this contribution, we also classified other habitat units into different categories according to their importance for jaguar conservation (Fig. 6). Habitat units occupied by jaguars but without the confirmation of males
and females were classified according to their potential of becoming a JCU. Areas that had habitat in good condition (medium to high suitability) larger than the habitat in good condition of the smallest JCU (230 km2 in
Linhares-Sooretama JCU) were categorized as ‘Potential Jaguar Conservation Units’ (PJCU, 42). Areas with confirmed jaguar presence but harboring less than 230 km2 of habitat in good condition were classified as ‘small
fragments with jaguar presence’ (Fig. 6).
Areas of suitable habitat but without jaguar records, were categorized considering their proximity to an occupied area of the JCU or PJCU and the size of the habitat fragment. A fragment of suitable habitat at <​15 km of a
JCU or PJCU was categorized as potential expansion area of these units. Isolated fragments of continuous habitat
in good condition (medium or high suitability) larger than 230 km2 were categorized as potential future core areas
(Fig. 6).

Evaluating the potential connectivity among JCUs.  To determine the potential connectivity of jaguar

populations among all the JCUs and PJCUs, we used a least-cost functional connectivity model44,64. We created
a resistance to movement surface, which was calculated as an inverse function of our habitat suitability model65.
This approach assumes that habitat quality has a direct relationship with facility to movement65,66. To determine
the least cost path we used the Linkage Mapper 0.967. This software uses core habitat areas (JCUs and PJCUs) and
raster resistance surfaces to identify and map least-cost linkages between adjacent core areas. Linkage Mapper
calculates accumulated costs as it moves away from a core area, and takes into account the distance and direction
to create a single composite cost-distance grid.

Evaluation of threats to jaguars in the JCUs.  To identify and rank the main threats to jaguars in every

JCU, we developed a questionnaire with a list of the known pressures on jaguars in the AF, and asked for potential
additional ones. The questionnaire was responded by 9 experts that are conducting research in the different JCUs.
This approach has been used before to identify the threats to jaguars on a continental scale14. We asked experts
to rank potential threats to jaguars, and requested information about recent cases of jaguar mortality induced by
humans in the region as a way to corroborate the ranking of threats for every JCU.
Finally, according to the obtained results on population estimates, isolation of every area and jaguar threats,
we propose management actions to mitigate the most important threats to jaguars and improve the chances of the
species population growth (Table 2 and Fig. 6).

Data availability

The datasets used in the analysis and the shape files obtained during the current study (habitat suitability model,
shape files of the AJO, APJO and important areas for jaguar conservation) will be available in a public repository.

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References

1. Estes, J. A. et al. Trophic downgrading of planet Earth. Science 333, 301–306 (2011).
2. Ripple, W. J. et al. Status and ecological effects of the world’s largest carnivores. Science 343, 124 –1484 (2014).
3. Woodroffe, R. & Ginsberg, J. R. Edge effects and the extinction of populations inside protected areas. Science 280, 2126–2128 (1998).
4. Chapron, G. et al. Recovery of large carnivores in Europe’s modern human-dominated landscapes. Science 346, 1517–1519 (2014).
5. Morell, V. Predator in the hood. Science 341, 1332–1335 (2013).
6. IUCN. The IUCN Red List of Threatened Species. (2016) Available at www.iucnredlist.org (Accessed: 29th April 2016).
7. Dirzo, R. et al. Defaunation in the Anthropocene. Science 345, 401–406 (2014).
8. Peres, C. A. Synergistic effects of subsistence hunting and habitat fragmentation on Amazonian forest vertebrates. Conserv. Biol. 15,
1490–1505 (2001).
9. Myers, N., Mittermeier, R. A., Mittermeier, C. G., da Fonseca, G. A. B. & Kent, J. Biodiversity hotspots for conservation priorities.
Nature 403, 853–885 (2000).
10. Ribeiro, M. C., Metzger, J. P., Martensen, A. C., Ponzoni, F. J. & Hirota, M. M. The Brazilian Atlantic Forest: how much is left, and
how is the remaining forest distributed? Implications for conservation. Biol. Conserv. 142, 1141–1153 (2009).
11. De Angelo, C., Paviolo, A. & Di Bitetti, M. S. Understanding species persistence for defining conservation actions: a management
landscape for jaguars in the Atlantic Forest. Biol. Conserv. 159, 422–433 (2013).
12. Jorge, M. L. S., Galetti, M., Ribeiro, M. C. & Ferraz, K. M. P. Mammal defaunation as surrogate of trophic cascades in a biodiversity
hotspot. Biol. Conserv. 163, 49–57 (2013).
13. Galetti, M. et al. Atlantic Rainforest’s jaguars in decline. Science 342, 930 (2013).
14. Sanderson, E. W. et al. Planning to save a species: the jaguar as a model. Conserv. Biol. 16, 58–72 (2002).
15. Beisiegel, B. M., Sana, D. & Moraes, E. JR The jaguar in the Atlantic Forest. Cat News 7, 14–18 (2012).
16. De Angelo, C., Paviolo, A. & Di Bitetti, M. Differential impact of landscape transformation on pumas (Puma concolor) and jaguars
(Panthera onca) in the Upper Paraná Atlantic Forest. Divers. Distrib. 17, 422–436 (2011).
17. Crawshaw, P. G. Jr. Comparative ecology of ocelot Felis pardalis and jaguar Panthera onca in a protected subtropical forest in Brazil
and Argentina. PhD Thesis, University of Florida, Gainesville, USA. (1995).
18. Cullen, L. Jr. Jaguars as landscape detectives for the conservation of Atlantic Forests in Brazil. PhD Thesis University of Kent,
Canterbury, UK. 178 pp (2006).
19. Leite, R., Boulhosa, R., Galvao, F. & Cullen, L. Jr. Conservación del jaguar en las áreas protegidas del bosque Atlántico de la costa de
Brasil In El jaguar en el nuevo milenio (eds Medellín, R. A. et al.) 25–42 (Ediciones Cientificas Universitarias, 2002).
20. Paviolo, A., De Angelo, C., Di Blanco, Y. & Di Bitetti, M. Jaguar population decline in the Upper Paraná Atlantic Forest of Argentina
and Brazil. Oryx 42, 554–561 (2008).
21. Srbek-Araujo, A. C. & Chiarello, A. G. Population status of the jaguar Panthera onca in one of its last strongholds in the Atlantic
Forest. Oryx, doi: 10.1017/S0030605315001222 (2016).
22. Schiaffino et al. Plan de acción para la conservacion de la población de Yaguarete (Panthera onca) del Corredor Verde de Misiones.
Subcomisión para la conservación del yaguareté en Misiones (2011).
23. Paula, R. C., Desbiez, A. & Cavalcanti, S. M. C. Plano de Ação para Conservação da Onça-Pintada no Brasil - Análise de Viabilidade
Populacional e Adequabilidade Ambiental in Série Espécies Amenaçadas (Instituto Chico Mendes de Conservação da Biodiversidade,
2011).
24. Paviolo, A. et al. The need for transboundary efforts to preserve the southernmost jaguar population in the world. Cat News 45,
12–14 (2006).
25. Ferraz, K. M. et al. How species distribution models can improve cat conservation-jaguars in Brazil. Cat News 7, 38–42 (2012).
26. De Angelo, C. El paisaje del Bosque Atlántico del Alto Paraná y sus efectos sobre la distribución y estructura poblacional del jaguar
(Panthera onca) y el puma (Puma concolor). PhD Thesis. Universidad de Buenos Aires, Buenos Aires, Argentina. p 252 (2009).
27. Huang, C. et al. Rapid loss of Paraguay’s Atlantic forest between 1970s and 2000 and the status of protected areas. Remote Sens.
Environ. 106, 460–466 (2007).
28. Crooks, K. R. Relative sensitivities of mammalian carnivores to habitat fragmentation. Conserv. Biol. 16, 488–502 (2002).
29. Zanin, M., Palomares, F. & Brito, D. The jaguar’s patches: viability of jaguar populations in fragmented landscapes. J. for Nat.
Conserv. 23, 90–97 (2015).
30. Desbiez, A. et al. Population viability analysis of jaguar populations in Brazil. Cat News 7, 35–37 (2012).
31. Haag, T. et al. The effect of habitat fragmentation on the genetic structure of a top predator: loss of diversity and high differentiation
among remnant populations of Atlantic Forest jaguars (Panthera onca). Mol. Ecol. 19, 4906–4921 (2010).
32. Crawshaw, P. G. Jr. Mortalidad inducida por humanos y conservación de jaguares: el Pantanal y el Parque Nacional Iguaçu en Brasil
in El jaguar en el nuevo milenio (eds Medellín, R. A. et al.) 451–464 (Ediciones Científicas Universitarias, 2002).
33. Azevedo, F. C. C. & Conforti, V. A. Decline of peccaries in a protected subtropical forest of Brazil: toward conservation issues.
Mammalia 72, 82–88 (2008).
34. Cullen, L. Jr., Bodmer, R. E. & Valladares Padua, C. Effects of hunting in habitat fragments of the Atlantic forests, Brazil. Biol.
Conserv. 95, 49–56 (2000).
35. Di Bitetti, M. S., Paviolo, A., Ferrari, C., De Angelo, C. & Di Blanco, Y. Differential responses to hunting in two sympatric species of
brocket deer (Mazama americana and Mazama nana). Biotropica 40, 636–645 (2008).
36. Paviolo, A. et al. Efecto de la caza y el nivel de protección en la abundancia de los grandes mamíferos del Bosque Atlántico de
Misiones in Contribuciones para la conservación y manejo en el Parque Nacional Iguazú (eds Carpinetti, B. & Garciarena, M.)
237–254 (Administración de Parques Nacionales de Argentina, 2009).
37. Conforti, V. A. & Azevedo, F. C. C. Local perceptions of jaguars (Panthera onca) and pumas (Puma concolor) in the Iguacu National
Park area, south Brazil. Biol. Conserv. 111, 215–221 (2003).
38. Balme, G. A., Slotow, R. & Hunter, L. T. B. Edge effects and the impact of non-protected areas in carnivore conservation: leopards in
the Phinda–Mkhuze Complex, South Africa. Anim. Conserv. 13, 315–323 (2010).
39. Revilla, E., Palomares, F. & Delibes, M. Edge-Core effects and the effectiveness of traditional reserves in conservation: Eurasian
badgers in Doñana National Park. Conserv. Biol. 15, 148–158 (2001).
40. Srbek-Araujo, A. C., Mendes, S. L. & Chiarello, A. G. Jaguar (Panthera onca Linnaeus, 1758) roadkill in Brazilian Atlantic Forest and
implications for species conservation. Brazilian Journal of Biology 75, 581–586 (2015).
41. De Angelo, C. et al. Participatory networks for large-scale monitoring of large carnivores: pumas and jaguars of the Upper Paraná
Atlantic Forest. Oryx 45(4), 534–545 (2011).
42. Sollmann, R., Torres, N. M. & Silveira, L. Jaguar conservation in Brazil: the role of protected areas. Cat News 4, 15–20 (2008).
43. Srbek-Araujo, A. C. Conservação da onça pintada (Panthera onca Linnaeus, 1758) na Mata Atlantica de Tabuleiro do Espírito Santo.
PhD Thesis. Universidad Federal de Minas Gerais (2013).
44. Rabinowitz, A. & Zeller, K. A. A range-wide model of landscape connectivity and conservation for the jaguar, Panthera onca. Biol.
Conserv. 143, 939–945 (2010).
45. Nijhawan, S. Conservation units, priority areas and dispersal corridors for jaguars in Brazil. Cat News 7, 43–47 (2012).
46. Kanagaraj, R., Wiegand, T., Kramer-Schadt, S., Anwar, M. & Goyal, S. P. Assessing habitat suitability for tiger in the fragmented Terai
Arc Landscape of India and Nepal. Ecography 34, 970–981 (2011).

Scientific Reports | 6:37147 | DOI: 10.1038/srep37147

14

www.nature.com/scientificreports/
47. Phillips, S. J., Anderson, R. P. & Schapire, R. E. Maximum entropy modeling of species geographic distributions. Ecol. Model. 190,
231–259 (2006).
48. Phillips, S. J. & Dudík, M. Modeling of species distributions with Maxent: new extensions and a comprehensive evaluation.
Ecography 31, 161–175 (2008).
49. Liu, C., Newell, G. & White, M. On the selection of thresholds for predicting species occurrence with presence-only data. Ecology
and Evolution 6(1), 337–348 (2016).
50. Fielding, A. H. & Bell, J. F. A review of methods for the assessment of prediction errors in conservation presence/absence models.
Environ. Conserv. 24, 38–49 (1997).
51. Elith, J. et al. Novel methods improve prediction of species’ distributions from occurrence data. Ecography 29, 129–151 (2006).
52. Anderson, R. P., Lew, D. & Peterson, A. T. Evaluating predictive models of species’ distributions: criteria for selecting optimal
models. Ecol. Model. 162, 211–232 (2003).
53. Efford, M. Density estimation in live trapping studies. Oikos 106, 598–610 (2004).
54. Royle, J. A., Karanth, K. U., Gopalaswamy, A. M. & Kumar, N. S. Bayesian inference in camera trapping studies for a class of spatial
capture-recapture models. Ecology 90, 3233–3244 (2009).
55. Noss, A. J. et al. Comparison of density estimation methods for mammal populations with camera traps in the Kaa-Iya del Gran
Chaco landscape. Anim. Conserv. 15, 1–11 (2012).
56. Sollmann, R. et al. Improving density estimates for elusive carnivores: accounting for sex-specific detection and movements using
spatial capture-recapture models for jaguars in central Brazil. Biol. Conserv. 144, 1017–1024 (2011).
57. Tobler, M. W. & Powell, G. V. Estimating jaguar densities with camera traps: problems with current designs and recommendations
for future studies. Biol. Conserv. 159, 109–118 (2013).
58. Gopalaswamy, A. M. et al. Program SPACECAP: software for estimating animal density using spatially explicit capture–recapture
models. Methods Ecol. Evol. 3, 1067–1072 (2012).
59. R Core Team R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria.
URL http://www.R-project.org/ (2013).
60. Soisalo, M. K. & Cavalvanty, S. M. C. Estimating the density of a jaguar population in the Brazilian Pantanal using camera-traps and
capture-recapture sampling in combination with GPS telemetry. Biol. Conserv. 129, 487–496 (2006).
61. White, G. C., Burnham, K. P., Otis, D. L. & Anderson, D. R. Program CAPTURE, Utah State University. US. http://www.mbr-pwrc.
usgs.gov/software/capture.shtml (1978).
62. Morato, R. G., Ferraz, K. D. B., de Paula, R. C. & de Campos, C. B. Identification of priority conservation areas and potential
corridors for jaguars in the Caatinga biome, Brazil. PloS one 9, e92950 (2014).
63. Zeller, K. Jaguars in the New Millennium data set update: the state of the jaguar in 2006. (Wildlife Conservation Society’s Jaguar
Conservation Program, 2007).
64. Adriaensen, F. et al. The application of ‘least-cost’ modelling as a functional landscape model. Landscape Urban Plan. 64, 233–247
(2003).
65. Mateo-Sánchez, M. C. et al. Estimating effective landscape distances and movement corridors: comparison of habitat and genetic
data. Ecosphere 6, 59 (2015).
66. Pullinger, M. G. & Johnson, C. J. Maintaining or restoring connectivity of modified landscapes: evaluating the leastcost path model
with multiple sources of ecological information. Landscape Ecol. 25, 1547–1560 (2010).
67. McRae, B. H. & Kavanagh, D. M. Linkage mapper connectivity analysis software. The Nature Conservancy (2011).

Acknowledgements

We thank all the people that provided jaguar records and information of camera-traps surveys. We also thank
the field assistants of our teams that collaborate during the field activities and Silvia Benito for their help with the
design of the figures. A.P., C.D.A., J.M.P., M.D.B., P.C., V.Q. and S.C. thank to CONICET, Fundacion Vida Silvestre
Argentina, WWF, Rufford Small Grant Foundation, WCS, Lincoln Park Zoo, SCGIS and ESRI for financial
support and the Ministry of Ecology of Misiones Province and National Park Administration of Argentina for
logistic support. K.M.P.M.B.F. thanks Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq),
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2014/09300-0) and Fundação Grupo Boticário
de Proteção à Natureza for financial support. KMPMBF and PMGJ thanks and Universidade Vila Velha (UVV
21/2015) and Fundação de Amparo à Pesquisa do Espírito Santo (FAPES 0607/2015) CNPq for the productivity
fellowship. ACSA thanks the financial support from Vale S.A./Instituto Ambiental Vale. F.L., D.S., L.C., M.P.
thanks to Fundo Brasileiro para a Biodiversidade - Tropical Forest Conservation Act agreement (FUNBio/TFCA),
Liz Claiborne and Art Ortenberg Foundation, Companhia Energética de São Paulo - CESP, The Mohamed bin
Zayed Species Conservation Fund, Panthera Small Grants Program, Oregon Zoo Future for Wildlife Program and
Wildlife Direct Inc. for financial support. BMB thanks FAPESP (2008/03099-0).

Author Contributions

A.P. did the general coordination of the study; A.P., C.D.A., K.M.P.M.B.F., R.M., M.X.S., R.C.P., B.M.B., P.M.G.J.,
A.S., F.L., M.V., V.Q., P.C., S.C. and J.M.P. participated in the discussion workshops for the elaboration of the
study; A.P., C.D.A., M.D.B., A.C.S.A., B.M.B., F.L., D.S., M.X.S., M.V., L.C., P.C., E.N., F.R.P. and S.F. provided
camera traps data; C.D.A., K.M.P.M.B.F. and M.L.J. did the habitat suitability analysis; A.P. and V.Q. did the
density estimation analysis; A.P., B.M.B., M.X.S., D.S., F.L., L.C., M.P., M.V., A.C.S.A., and E.N. evaluated the main
threats in the JCU; A.P., C.D.A with the participation of all the authors made the identification of priority areas
for conservation and the management recommendations for jaguar conservation. J.M.P., C.D.A. and A.P. did
the connectivity analysis. A.P., C.D.A., K.M.P.M.B.F., R.M., P.C., J.M.P. wrote the main manuscript. A.P., C.D.A.,
K.M.P.M.B.F., R.M., J.M.P., A.C.S.A., B.M.B., F.L., D.S., M.X.S., M.V., L.C., P.C., M.L.J., P.G., T.M.A., P.C., M.P.,
A.S.M.C.S., V.Q., E.N., F.R.P., S.F., S.C., E.A.M. and F.A. reviewed and approved the manuscript.

Additional Information

Supplementary information accompanies this paper at http://www.nature.com/srep
Competing financial interests: The authors declare no competing financial interests.
How to cite this article: Paviolo, A. et al. A biodiversity hotspot losing its top predator: The challenge of jaguar
conservation in the Atlantic Forest of South America. Sci. Rep. 6, 37147; doi: 10.1038/srep37147 (2016).

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15

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