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Jeffrey J. Thompson

Jeffrey J. Thompson
CONACYT-Guyra Paraguay

Ph.D. Forestry and Natural Resources

About

76
Publications
63,947
Reads
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692
Citations
Introduction
My research concerns understanding the effects of agricultural and grazing on wildlife through applying a comparative approach to elucidate common patterns across systems towards understanding the processes that determine species abundance and richness. This revolves around developing and employing sound quantitative techniques and decision making using a decision analytic approach to investigate and manage predator-prey dynamics and the extractive use of wildlife in the context of land use.
Additional affiliations
March 2016 - present
Guyra Paraguay
Position
  • Co-coordinator
December 2015 - present
Consejo Nacional de Ciencia y Tecnologia (CONACYT)
Position
  • Scientist (Level II)
September 2014 - present
Guyra Paraguay
Position
  • Research Associate

Publications

Publications (76)
Article
Full-text available
We employed least-cost and circuit theory modeling to model connectivity among previously defined Jaguar Conservation Units (JCUs) at the southern limit of the jaguar’s range in Argentina, Bolivia, Brazil and Paraguay, to assess the effects of deforestation and land use change from 2000 to 2014. Due to uncertainty over possible limitations to jagua...
Article
Full-text available
Home range and core area size were estimated for jaguar (Panthera onca) in western Paraguay in the Dry Chaco, Humid Chaco and Pantanal using an autocorrelated kernel density estimator. Mean home range size was 818 km² (95% confidence interval: 425–1981) in the Dry Chaco and 237 km² (95% confidence interval: 90–427) in the Humid Chaco/Pantanal. Core...
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
Full-text available
Using GPS telemetry, we quantified space use and movements of Jaguars (Panthera onca) in remnant populations in the Paraguayan Atlantic forest, within a comparative context with populations in the Argentine and Brazilian Atlantic forest. Mean estimated home range size was 160 km², estimated to be nearly equal to Jaguars in the Morro do Diabo State...
Article
Full-text available
Maintaining population connectivity is an important component of jaguar (Panthera onca) conservation. However, the effectiveness of connectivity corridors can be affected by anthropogenic factors. At the southwestern limit of the jaguar's current distribution in the Yungas and Dry Chaco ecoregions, connectivity among jaguar populations has been com...
Article
Full-text available
The Dry Chaco has one of the highest deforestation rates of the world. The chacoan peccary (Catagonus wagneri; ChP) is endemic to the forests of this region and faces a high risk of extinction. However, we lack sufficient information about this species to develop effective conservation actions. This is the first study to determine the relevance of...
Preprint
Full-text available
The Pantanal wetland harbours the second largest population of jaguars in the world. Alongside climate and land-use changes, the recent mega-fires in the Pantanal may pose a new threat to the jaguars’ long-term survival. To put these growing threats into perspective, we addressed the reach and intensity of fires that have affected jaguar conservati...
Presentation
Full-text available
Globally, fragmented landscapes and anthropogenic pressures are causing steep declines in large carnivore populations. Conservation organizations are working to counteract these trends through the reintroduction of large carnivores and translocations within existing populations to promote gene flow and resilience. This study analyzes a dataset we g...
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...
Article
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...
Article
Jaguars (Panthera onca), like other apex predators, are highly susceptible to habitat loss and fragmentation given their low demographic potential and large habitat area requirements. Across their range, the Pantanal is considered critical for the jaguar's long-term conservation. Here we provide the first multi-scale path selection function model f...
Article
Full-text available
Background Reconciling agriculture and biodiversity conservation is a challenge given the growing demand for agricultural products. In recent decades, Argentina has witnessed agricultural expansion and intensification affecting biodiversity and associated ecosystem services. Within agroecosystems, the level of habitat quality is critical for birds,...
Article
Full-text available
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
Full-text available
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
Full-text available
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...
Article
Full-text available
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
Assessments of the role that small (<500 km²) protected areas play in conservation of large carnivores in landscapes where the species are persecuted are scarce. Using camera-trap sampling we estimated puma (Puma concolor) population abundance, site use intensity, and relative abundance of prey in Lihué Calel National Park (320 km²) and two neighbo...
Article
Full-text available
Habitat destruction and overexploitation are the main threats to biodiversity and where they co-occur, their combined impact is often larger than their individual one. Yet, detailed knowledge of the spatial footprints of these threats is lacking, including where they overlap and how they change over time. These knowledge gaps are real barriers for...
Article
Full-text available
Field information is essential for developing conservation actions, but standard methods for surveying wildlife are often inefficient in large, remote areas. Without efficient methods, surveying is difficult or even impossible. Consequently, some of the most threatened species and regions remain un- or under-surveyed, e.g. South American Chaco. Sur...
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
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
Satellite telemetry is an increasingly utilized technology in wildlife research, and current devices can track individual animal movements at unprecedented spatial and temporal resolutions. However, as we enter the golden age of satellite telemetry, we need an in-depth understanding of the main technological, species-specific and environmental fact...
Data
R-code for boosted beta regression (Fix acquisition rate). (R)
Data
Covariate partial effects on the variability of the fix acquisition rate. (PDF)
Data
Tagged individuals per species. (PDF)
Data
Covariate partial effects on the variability of the Overall fix success rate. (PDF)
Data
Trends in observed data. (PDF)
Data
Global dataset for boosted beta regressions. (CSV)
Data
Description of data fields in S1 Data. (CSV)
Data
Satellite telemetry articles published. (PDF)
Data
Distribution of response variables and covariates. (PDF)
Data
Unit purchase and operation costs. (PDF)
Data
R-code for boosted beta regression (Overall fix success rate). (R)
Data
Standardized data collection questionnaire. (PDF)
Data
Satellite telemetry evaluations. (PDF)
Article
Full-text available
Aim Understanding how habitat loss and overhunting impact large carnivores is important for broad‐scale conservation planning. We aimed to assess how these threats interacted to affect jaguar habitat (Panthera onca) between 1985–2013 in the Gran Chaco, a deforestation hotspot. Location Gran Chaco ecoregion in Argentina, Paraguay and Bolivia. Meth...
Chapter
Full-text available
Redlist for threatened species of mammals of Paraguay. Chapter related to Carnivora species.
Chapter
Full-text available
Redlist species of threatened mammals of Paraguay: Cetartiodactyla and Perissodactyla, ungulates.
Chapter
Full-text available
Se evaluaron 179 especies, teniendo al tapiti Sylvilagus brasiliensis y al Dasypus septemcinctus como especies no evaluadas NE (ver capítulo Xenarthra). Entre las especies evaluadas, se resalta que 29 especies fueron catalogadas como Datos Insuficientes o DD, esto significa que la información disponible sobre estas especies en nuestro país es tan e...
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...
Chapter
Full-text available
We analyzed the distribution patterns of primates and their conservation status Alouatta caraya, Aotus azarae, Mico melanurus, Sapajus cay, and Callicebus pallescens in Paraguay. We employed a maximum likelihood estimator to understand species distributions based upon observational records. Threats and the presence of species in protected areas wer...
Book
Full-text available
Este libro contiene información sobre la categorización de especies de mamíferos del Paraguay. Introduce a los antecedentes de este tipo de categorización de especies silvestres de nuestro país y explica la metodología utilizada para la misma (UICN versión 3.1). Se describe para las especies amenazadas su situación actual, las amenazas que enfrenta...
Preprint
We estimated home range and core area size for jaguar ( Panthera onca ) in western Paraguay in the Dry Chaco, Humid Chaco and Pantanal using an autocorrelated kernel density estimator. Mean home range size was 818 km ² (95% CI:425-1981) in the Dry Chaco and 237 km ² (95% CI:90-427) in the Humid Chaco/Pantanal. Core areas, defined as the home range...
Article
Full-text available
Human–wildlife conflict and habitat loss are threatening carnivore populations in southern Africa, where the bulk of research focuses on large predators. However, scant research exists on medium and small carnivore (mesocarnivore) ecology. We employed hierarchical community modelling to estimate the effect of habitat on species occurrence and the e...
Article
Full-text available
The subtropical dry forests are experiencing rapid clearing in the southamerican Great Chaco region, mainly for soybean production in Argentina. This is causing biodiversity loss and soil salinization. This forests are unique for the floristic richness and the dense forest cover in a region characterized by semiarid climatic conditions. The authors...
Article
Full-text available
El pecarí del Chaco conocido localmente en Para-guay como tagua (Catagonus wagneri) es una es-pecie en peligro de extinción endémica del Chaco Americano, cuya situación se mantiene en dete-rioro como consecuencia de la pérdida y transfor-mación de su hábitat y de la caza excesiva en toda su área de distribución. Este trabajo presenta los resultados...
Article
Full-text available
Abstract The Chacoan peccary (Catagonus wagneri), or Tagua, an endemic species living in the Chaco ecoregion, is endangered by highly increasing deforestation rates across the region, particularly in the last decade. This situation highlights the need to better understand the current distribution of the species, as well as how environmental conditi...
Article
Full-text available
The Gran Chaco is an ecoregion covering 1.5 million km 2 of Argentina, Bolivia and Paraguay and is considered one of the last "wilderness" areas in the Neotropics. Currently, the Paraguayan Gran Chaco is undergoing significant changes in land use consisting of deforestation for the creation of livestock pasture. This widespread deforestation and ha...
Book
Full-text available
Este libro es destinado para el uso por biólogos del campo y otras personas, incluso biólogos de campo en el futuro que podrían estar en un curso de la universidad y trabajando en estudios y conservación de animales. Nuestro objetivo es que los biólogos usen este libro como (haciendo apología a nuestro colega Evan Cooch) una “introducción suave” al...
Article
Full-text available
We studied the daily activity pattern and habitat use of the lowland tapir Tapirus terrestris and their relationship with environmental and anthropic variables. We used photographic records of tapirs obtained during five camera-trap surveys conducted in three areas of the Atlantic Forest of Argentina that differ in their protection against poaching...