J. Antonio de la Torre

J. Antonio de la Torre
Xishuangbanna Tropical Botanical Garden · Southeast Asia Biodiversity Research Institute

BSc in Biology, MSc in Biology, PhD Biological Sciences

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66
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Publications

Publications (66)
Article
We examined tick communities on wild felid hosts in three ecoregions of Mexico. We collected 186 ticks of 7 species from 10 pumas (Puma concolor) and 9 jaguars (Panthera onca). Tick community composition varied across the ecoregions, and across host species within each region. Overall, Ixodes affinis, Amblyomma ovale, and Amblyomma tenellum were th...
Chapter
The jaguar, an important symbol across the Americas, is one of the three largest cats in the world. Despite the ecological and cultural importance of this species, its populations are decreasing due to numerous threats such as habitat loss and degradation, poaching, prey depletion, among others. Prior to 1900s, the jaguar lived from southern United...
Article
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Context Land use change, habitat loss and fragmentation are the major threats to jaguar conservation in Latin America. Here, we integrate the information of jaguar’s distribution to identify priority areas for its conservation. Objective We evaluated the effect of topographic, anthropogenic and landscape variables on habitat suitability to evaluat...
Article
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The jaguar ( Panthera onca ) is one of the most threatened carnivores in the Americas. Despite a long history of research on this charismatic species, to date there have been few systematic efforts to assess its population size and status in most countries across its distribution range. We present here the results of the two National Jaguar Surveys...
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Spatial capture–recapture models have been widely used to estimate densities of species where individuals can be uniquely identified, but alternatives have been developed for estimation of densities for unmarked populations. In this study we used camera-trap records from 2018 to estimate densities of a species that does not always have individually...
Article
Large terrestrial carnivores have undergone some of the largest population declines and range reductions of any species, which is of concern as they can have large effects on ecosystem dynamics and function.1, 2, 3, 4 The jaguar (Panthera onca) is the apex predator throughout the majority of the Neotropics; however, its distribution has been reduce...
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Full-text available
Large terrestrial carnivores have undergone some of the largest population declines and range reductions of any species, which is of concern as they can have large effects on ecosystem dynamics and function.1 , 2 , 3 , 4 The jaguar (Panthera onca) is the apex predator throughout the majority of the Neotropics; however, its distribution has been red...
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Full-text available
Theory of Change (ToC) and Social Return of Investment (SROI) are planning tools that help projects craft strategic approaches in order to create the most impact. In 2018, the Management & Ecology of Malaysian Elephants (MEME) carried out planning exercises using these tools to develop an Asian elephant conservation project with agriculture communi...
Article
Conflicts between humans and large carnivores are exacerbated in poor rural areas where people's livelihood depends on livestock ranching. Here we present a pseudo-experimental and co-participatory approach to test the effectiveness of a program to mitigate conflicts with jaguars (Panthera onca) in Mexico's Mayan Forest. We worked with eleven ranch...
Data
Flow chart of the methodology followed in this study which include the four stages a) capacity building, b) codesign of management plan for ranchers, c) monitoring and d) evaluation. Evaluation was based on four aspects: 1) predation cases before and after the intervention; 2) cost-benefits of the intervention; 3) effect on productivity; 4) jaguar...
Article
Misconceptions about species’ ecological preferences compromise conservation efforts. Whenever people and elephants share landscapes, human–elephant conflicts (HEC) occur in the form of crop raiding, elephant attacks on people and retaliatory actions from people on elephants. HEC is considered the main threat to the endangered Asian elephant Elepha...
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Biodiversity loss is currently one of the most important societal concerns worldwide, and it is caused mainly by habitat loss and fragmentation, biological invasion, and climate change (Vitousek et al. 1996, Newbold et al. 2015, Bellard et al. 2016). Introduced species can have positive effects on human well‐being, especially when used for liveliho...
Article
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Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropica...
Preprint
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The range-wide management of the jaguar (Panthera onca) depends upon maintaining core populations connected through multi-national, transboundary cooperation, which is dependent upon understanding the movement ecology and space use of jaguars throughout their range. Using 117 telemetry trajectories from 12 ecoregions, we examined the landscape-leve...
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The long-term survival of conflict-prone megafauna such as tigers Panthera tigris and Asian elephants Elephas maximus requires people’s tolerance and willingness to coexist with them. Understanding people’s attitudes can help design conservation interventions that are more effective and supported by various stakeholders. We studied Malaysian citize...
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Accurately quantifying species’ area requirements is a prerequisite for effective area‐based conservation. This typically involves collecting tracking data on species of interest and then conducting home‐range analyses. Problematically, autocorrelation in tracking data can result in space needs being severely underestimated. Based on previous work,...
Article
Large mammalian herbivores are experiencing population reductions and range declines. However, we lack regional knowledge of population status for many herbivores, particularly in developing countries. Addressing this knowledge gap is key to implementing tailored conservation strategies for species whose population declines are highly variable acro...
Preprint
Full-text available
Connectivity among jaguar (Panthera onca) populations will ensure natural gene flow and the long-term survival of the species throughout its range. Jaguar conservation efforts have focused primarily on connecting suitable habitat in a broad-scale. Accelerated habitat reduction, human-wildlife conflict, limited funding, and the complexity of jaguar...
Article
Full-text available
Background: Connectivity among jaguar (Panthera onca) populations will ensure natural gene flow and the long-term survival of the species throughout its range. Jaguar conservation efforts have focused primarily on connecting suitable habitat in a broad-scale. Accelerated habitat reduction, human-wildlife conflict, limited funding, and the complexi...
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Full-text available
One of the most vital and urgent global conservation challenges is to deal with the loss and fragmentation of wildlife habitats, particularly for large‐bodied and wide‐ranging terrestrial megafauna. The Central Forest Spine Master Plan for Ecological Linkages (CFS) was developed by the Malaysian Federal Government in 2010 to protect biodiversity an...
Article
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Habitat fragmentation is a primary driver of wildlife loss, and establishment of biological corridors is a common strategy to mitigate this problem. A flagship example is the Mesoamerican Biological Corridor (MBC), which aims to connect protected forest areas between Mexico and Panama to allow dispersal and gene flow of forest organisms. Because fo...
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Xenarthrans—anteaters, sloths, and armadillos—have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with domestic dogs, these species have been threatened locally, regionally, or even across...
Article
Full-text available
Xenarthrans—anteaters, sloths, and armadillos—have essential functions for ecosystem maintenance, such as insect control and nutrient cycling, playing key roles as ecosystem engineers. Because of habitat loss and fragmentation, hunting pressure, and conflicts with domestic dogs, these species have been threatened locally, regionally, or even across...
Article
Full-text available
Species distribution models (SDMs) are statistical tools used to develop continuous predictions of species occurrence. ‘Integrated SDMs’ (ISDMs) are an elaboration of this approach with potential advantages that allow for the dual use of opportunistically collected presence-only data and site-occupancy data from planned surveys. These models also a...
Chapter
Movement is a critical animal behavior which reflects animal response to its current biological needs and to its environment. Comprehending how and why the animals use the available space and the underlying drivers of animal movements is essential to the management and conservation for both species and ecosystems. This chapter aims to understand an...
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The umbrella species concept posits that protection of a single, wide-ranging species may confer protection to a large number of sympatric species. Due to their large home ranges, widespread distribution in the Mesoamerican Biodiversity Hotspot (MBH), and status as the focal species of numerous conservation initiatives, the jaguar Panthera onca is...
Article
Although the Near Threatened jaguar Panthera onca ranges from the south-west USA to central Argentina, populations outside Amazonia are generally small and isolated. One such area, the Sierra Madre de Chiapas in the state of Chiapas, Mexico, is potentially an important area for jaguar conservation but information on the species in this region is li...
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The field of movement ecology has rapidly grown during the last decade, with important advancements in tracking devices and analytical tools that have provided unprecedented insights into where, when, and why species move across a landscape. Although there has been an increasing emphasis on making animal movement data publicly available, there has...
Article
Full-text available
The field of movement ecology has rapidly grown during the last decade, with important advancements in tracking devices and analytical tools that have provided unprecedented insights into where, when, and why species move across a landscape. Although there has been an increasing emphasis on making animal movement data publicly available, there has...
Article
Nightly movements of bats have been described for only a handful of species around the world. The lesser long-nosed bat (Leptonycteris yerbabuenae) is a migratory pollinator recently delisted from threatened status in Mexico and proposed in early 2017 to be delisted from endangered status in the United States. Documenting the nightly movements of t...
Preprint
Full-text available
Nightly movements of bats have been described for only a handful of species around the world. The lesser long-nosed bat (Leptonycteris yerbabuenae) is a migratory pollinator recently delisted from threatened status in Mexico and proposed in early 2017 to be delisted from endangered status in the United States. Documenting the nightly movements of t...
Article
Baird’s tapir (Tapirus bairdii) is the largest native mammal that inhabits the Neotropics, and it is enlisted as Endangered by the IUCN Red List. The historic distribution of this species included the area from southern Mexico to northern Colombia. However, its distribution and populations have been reduced drastically during the past 30 years. The...
Article
Full-text available
Large solitary felids have to communicate indirectly with their conspecifics to advertise their presence and social status, to find mates and to maintain their land tenure system. However, there is little information about the social behaviour of jaguars Panthera onca. We investigated the marking behaviour of several jaguars on a trail located with...
Article
We test a new species distribution modelling (SDM) framework, while comparing results to more common distribution modelling techniques. This framework allows for the combination of presence-only (PO) and presence-absence (PA) data and accounts for imperfect detection and spatial bias in presence data. The new framework tested here is based on a Poi...
Article
Full-text available
Jaguars (Panthera onca) and pumas (Puma concolor) are sympatric throughout the entire range of the jaguar. Pumas are smaller in areas where they are sympatric with jaguars and their body size is larger outside the distribution range of jaguars. This pattern has been explained as an effect that natural selection has promoted through character displa...
Data
Figure B.1. Area-adjusted frequency categories of RSPF scores based on validation data set and independent camera trap records.
Data
Table C.1. Step Selection Function models tested to define jaguar habitat in the Southern Mayan Forest.
Data
Table D.1. Pairwise cumulative resistances values between the habitat patches according with the Circuit Theory analysis. In the table are only shown the resistances values between habitat patches that not exceed the distance threshold of 15 km between them (Euclidian distance). This threshold value was established on the basis of the maximum dista...
Data
Table E.1. Values of variables considered for categorization of corridors.
Data
Table A.1. Resource Selection Probability Functions models tested to define jaguar habitat in the Southern Mayan Forest.
Article
Full-text available
Understanding how large felids use space is essential for the design of conservation plans that are required for their survival. Jaguars (Panthera onca) and pumas (Puma concolor) are the largest felids in the Neotropics, and they are sympatric throughout the entire range of the jaguar. However, there is very little information about the spatial req...
Article
Full-text available
The IUCN Red List is widely used to guide conservation policy and practice. However, in most cases the evaluation of a species using IUCN Red List criteria takes into account only the global status of the species. Although subpopulations may be assessed using the IUCN categories and criteria, this rarely occurs, either because it is difficult to id...
Article
Full-text available
The ocelot is the third largest cat that occurs in Mexico. Despite all the information that has been collected regarding its distribution in the country, little is known about its basic ecology in Mexico. In this study we estimated population density of ocelots and their activity patterns for the Greater Lacandona Ecosystem region. Data were obtain...
Article
Full-text available
The current distribution of the puma (Puma concolor) in Mexico in the most of the country is unknown. Through an ecological niche modelling approach using the Maxent algorithm we identified the potential distribution of the puma in the Aguascalientes State. To perform de model we used 41 field records of the species, 19 climatic variables and 3 top...
Article
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Jaguar Panthera onca populations have declined severely in Mexico because of habitat loss and poaching of the species and its natural prey. One of the most important, but poorly known, populations of the jaguar remaining in Mexico resides in the Greater Lacandona Ecosystem in Chiapas. Our objective was to determine the density of jaguars in souther...
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Full-text available
Resumenes del I Simposio ecología y conservación de pequeños carnívoros (Felidae, Mustelidae, Procyonidae y Mephitidae) en Mesoamérica.
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Pteronotus personatus (Wagner, 1843) is a mormoopid bat commonly called Wagner’s mustached bat. A small bat, fully furred, it is 1 of 6 species in the genus Pteronotus. This species ranges from the most tropical regions of Mexico to South America across northern Venezuela, Guyana, Suriname, and French Guiana and through northwestern Colombia, and i...
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During a recent visit to María Madre Island, in the Tres Marías Island archipelago, 2 specimens of Hypopachus variolosus were found. This new record of the sheep frog from Tres Marías Island archipelago represents the first island record for this species. Due to the uncertainty about its conservation status in this locality, we consider necessary t...
Article
Full-text available
During a recent visit to María Madre Island, in the Tres Marías Island archipelago, 2 specimens of Hypopachus variolosus were found. This new record of the sheep frog from Tres Marías Island archipelago represents the first island record for this species. Due to the uncertainty about its conservation status in this locality, we consider necessary t...
Article
Full-text available
The distribution of the greater grison (Galictis vittata) in México goes from southern Tamaulipas and eastern San Luis Potosí, to the south along the Gulf coast to the Isthmus of Tehuantepec, Oaxaca, continuing through Chiapas and all of the Yucatán Peninsula. However, this species has not been recorded for the Selva Lacandona region, Chiapas, Méxi...
Article
Full-text available
The puma´s diet in a semi-arid region of central Mexico was determined by scat analyses. The study was conducted at two sites in the state of Aguascalientes: the Natural Protected Area of Sierra Fría and the El Muerto and Laurel ranges. Fifty-five prey items were found in thirty-eight scat samples. The white-tailed deer was the main prey item, foll...

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