Abstract
AbstractHow a predator uses its landscape to move through its territory and acquire prey is a fundamental question for scientific research. The influence of abiotic and biotic factors on space use of large carnivores has profound implications for their future management and conservation. In the Pantanal, Brazil, jaguars (Panthera onca) are the apex predator, but conflicts with cattle depredations pose a risk to their future conservation. We examined whether behavioral state, sex, and season influenced how jaguars used the landscape in the Pantanal. To accomplish this, we radio‐collared four females and six males; radio‐collared jaguars were monitored for 76 radio‐months with 11,787 GPS locations acquired. We developed resource selection functions (RSFs) examining how female and male jaguars used their landscape during three behavioral states (moving, killing native prey, killing cattle) during two seasons (dry, wet). From the RSF models, we found similar variables and relationships of landscape characteristics that jaguars selected for when moving and when depredating native prey and cattle. While moving, jaguars selected for locations that were either in dense cover or very near dense cover, with higher plant diversity and closer to water than available across the landscape. While null models suggested jaguars opportunistically depredated native prey in the dry season and cattle in the wet season, there was some indication they selected for specific landscape characteristics, mainly dense cover when killing cattle in the dry season and native prey in the wet season. Both sexes killed native prey and cattle within dense cover or close to dense cover as expected of an ambush predator. Particular habitat types were not important as long as there was dense cover for concealment. Additionally, jaguars killed prey closer to water than was available on the landscape. The similar variables across the models showed the importance of dense cover and distance to dense cover during all three behavioral states indicating jaguars in the Pantanal were “always on the prowl.” Understanding the spatial requirements for jaguars during the acquisition of native prey and cattle may lead to improved management strategies to allow for continued coexistence of jaguars in an area of traditional cattle production.
Highlights
Understanding how a predator uses the landscape to secure prey and other resources has been a source of interest for many decades (e.g., Rosenzweig 1966, Kruuk 1972, Schaller 1972)
Our objective was to assess whether behavioral state, sex, and season influenced how jaguars used the landscape in the Pantanal of Brazil
Radiocollared jaguars were monitored for a total of 76 radio-months with 11,787 GPS locations acquired
Summary
Understanding how a predator uses the landscape to secure prey and other resources has been a source of interest for many decades (e.g., Rosenzweig 1966, Kruuk 1972, Schaller 1972). While prey abundance and biomass influence the abundance of carnivores (e.g., Carbone and Gittleman 2002), habitat characteristics and the spatial structure of vegetation impact movement patterns of predators and their prey (e.g., Caro and FitzGibbon 1992, Denno et al 2005, Sih 2005). Jaguars must evaluate and determine which habitats provide sufficient cover to remain hidden but are not so dense that prey cannot conduct effective surveillance. Such habitats include the edge between dense cover (e.g., forests, dense marshland) and open cover (e.g., cultivated fields, low structured grasslands; Crawshaw and Quigley 1991, Laundre and Hernandez 2003, Cullen et al 2013). Resource managers could focus their efforts on those potentially overlapping habitats with the goal of reducing cattle depredations and easing tensions among local ranchers and jaguar conservationists
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
