Monitoring jaguar populations Panthera onca with non-invasive genetics: a pilot study in Brazilian ecosystems
Séverine Roques,Mariana Malzoni Furtado,Anah Tereza de Almeida Jácomo,Leandro Silveira,Rahel Sollmann,Natália Mundim Tôrres,José A. Godoy,Francisco Palomares +7 more
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TLDR
It is shown that non-invasive genetic sampling can be a reliable tool to study population parameters and to monitor the genetic status of jaguar populations in different habitats and could provide a baseline for non-Invasive genetic studies of other wild felid populations.Abstract:
The global population of jaguars Panthera onca has decreased significantly since the beginning of the 20th century. Given the scarcity of demographic and biological information, estimating population parameters is critical for the design of conservation measures. The jaguar's elusive behaviour makes it impossible to estimate and monitor populations by direct observation. We propose a non-invasive genetic sampling approach and demonstrate its potential for large-scale monitoring. Sex identification was optimized for faecal samples of jaguars and other felids. We also optimized a set of 11 microsatellite markers for reliable identification of individuals. We estimated the effectiveness of faecal sample genotyping in two distinct Brazilian biomes: the Pantanal and the semi-arid Caatinga. Almost 90% of the samples that were molecularly identified as jaguar (n = 90) were successfully genotyped and were assigned to 30 individuals. Genetic diversity was generally high but was significantly lower in the Caatinga population. We show that non-invasive genetic sampling can be a reliable tool to study population parameters and to monitor the genetic status of jaguar populations in different habitats. It may also be useful for future surveys of jaguars that address ecological, behavioural and conservation issues, and could provide a baseline for non-invasive genetic studies of other wild felid populations.read more
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Combining camera-trapping and noninvasive genetic data in a spatial capture–recapture framework improves density estimates for the jaguar
Rahel Sollmann,Rahel Sollmann,Natália Mundim Tôrres,Natália Mundim Tôrres,Mariana Malzoni Furtado,Mariana Malzoni Furtado,Anah Tereza de Almeida Jácomo,Francisco Palomares,Séverine Roques,Leandro Silveira +9 more
TL;DR: The ability to combine different surveys into a single analysis with shared parameter allows for more precise population estimates, while at the same time enabling researchers to employ complementary survey techniques in the study of little known species.
Journal ArticleDOI
Identification of Priority Conservation Areas and Potential Corridors for Jaguars in the Caatinga Biome, Brazil
Ronaldo Gonçalves Morato,Katia Maria Paschoaletto Micchi de Barros Ferraz,Rogério Cunha de Paula,Cláudia Bueno de Campos +3 more
TL;DR: Using the jaguar as a focal species and combining SDM and expert opinion was able to create a valid framework for practical conservation actions at the Caatinga biome and the same approach could be used for the conservation of other carnivores.
Journal ArticleDOI
Effects of habitat deterioration on the population genetics and conservation of the jaguar
Séverine Roques,R. Sollman,A.T.A. Jácomo,Natália Mundim Tôrres,Leandro Silveira,Cuauhtémoc Chávez,Claudia Keller,D. Mello do Prado,P. Carignano Torres,C. Jorge dos Santos,X. Bernardes Garcia da Luz,William E. Magnusson,José A. Godoy,Gerardo Ceballos,Francisco Palomares +14 more
TL;DR: It is demonstrated that the jaguar is highly sensitive to habitat fragmentation especially in human-dominated landscapes, and that in Brazil, the existing but limited genetic connectivity in the central protected areas should be maintained.
Journal ArticleDOI
The potential for large-scale wildlife corridors between protected areas in Brazil using the jaguar as a model species
Leandro Silveira,Rahel Sollmann,Rahel Sollmann,Anah Tereza de Almeida Jácomo,José Alexandre Felizola Diniz Filho,Natália Mundim Tôrres +5 more
TL;DR: In this article, a Brazil-wide evaluation of potential large scale corridors connecting protected jaguar populations was performed, where six variables (human population size, dam reservoir size, number of dams, roads, railways and cities) were analyzed across 180 potential corridors connecting 298 protected areas.
Journal ArticleDOI
High Proportion of Male Faeces in Jaguar Populations
Francisco Palomares,Séverine Roques,Cuauhtémoc Chávez,Leandro Silveira,Claudia Keller,Rahel Sollmann,Denise Mello do Prado,Patricia Carignano Torres,Begoña Adrados,José A. Godoy,Anah Tereza de Almeida Jácomo,Natália Mundim Tôrres,Mariana Malzoni Furtado,José Vicente López-Bao +13 more
TL;DR: The hypothesis that there are effectively more males than females in jaguar populations cannot be discarded, which could be due to the fact that females are territorial and males are not, or a tendency for males to disperse into suboptimal areas for the species.
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