Article
Ecology
Maximilian L. Allen, L. Mark Elbroch, Heiko U. Wittmer
Summary: Interactions between apex predators and dominant scavengers, such as kleptoparasitism by American black bears on puma kills, can have significant effects on the foraging behavior and energetics of the apex predators. The study found that black bears were the most frequent scavenger of puma kills, leading to pumas spending less time at their kill sites and experiencing energetic losses, which in turn influenced their inter-kill intervals and kill rates. The results highlight the importance of understanding interspecific interactions in ecological communities and how dominant scavengers can impact apex predator dynamics.
BASIC AND APPLIED ECOLOGY
(2021)
Article
Biodiversity Conservation
L. M. Elbroch, S. H. Williams, O. Ohrens, K. Pilgrim, A. Moeller, S. Arroyo-Arce, M. Parker, D. Goic, H. Robinson, M. K. Schwartz
Summary: Determining the abundance of cryptic carnivores is essential for conservation management and coexistence strategies. This study compares two methods, one using camera traps and the other using genetic data extracted from scats, to estimate the population of pumas in a UNESCO Biosphere Reserve in Chile. The results show the variation in estimates depending on the analysis start time and length of the sampling window, and present a refined iterative sampling approach to stabilize density estimates.
ANIMAL CONSERVATION
(2023)
Review
Ecology
Harshad Karandikar, Mitchell W. Serota, Wilson C. Sherman, Jennifer R. Green, Guadalupe Verta, Claire Kremen, Arthur D. Middleton
Summary: Large carnivores, such as pumas, are crucial in terrestrial ecosystems, but their range has significantly decreased in the past two centuries. Understanding the diets of large carnivores is the first step in comprehending their ecological roles and addressing conservation challenges. Pumas have a diverse diet and show flexibility in consuming various prey species, with their diet changing according to habitat, environmental conditions, and human activity. Maintaining intact native prey assemblages is essential for their conservation.
ECOLOGY AND EVOLUTION
(2022)
Article
Ecology
Justin G. Clapp, Joseph D. Holbrook, Daniel J. Thompson
Summary: Evaluating animal location concentration provides insights into animal activity and behavior, with cluster algorithms offering a framework for modeling and predicting behavioral states. The GPSeqClus package processes location datasets and calculates movement attributes, mapping locations and clusters for efficient data processing and navigation. It highlights the ability to modify existing cluster attributes, accommodate different data types, and aid in developing predictive cluster models for understanding animal behavior.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
L. Mark Elbroch, Nicolas Lagos, Jorge Cardenas, Dania Goic, Rodrigo Moraga, Omar Ohrens
Summary: Monitoring wildlife populations is crucial for conservation, but it is expensive and lacks baseline data. This study explored the potential of using ordinary people's observations to determine individual pumas in southern Patagonia. The participants performed well, and a dataset was built, providing important conservation data for the Torres del Paine UNESCO Biosphere in southern Chile.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Mauricio Cifuentes-Ibarra, L. Mark Elbroch, Omar Ohrens, Jose Infante, Cristian Bonacic
Summary: Ecotourism generates significant economic benefits but may have unintended negative impacts on local communities and wildlife, requiring careful management and regulation.
GLOBAL ECOLOGY AND CONSERVATION
(2023)
Article
Ecology
John Terrill Paterson, Kelly M. Proffitt, Nicholas J. DeCesare, Justin A. Gude, Mark Hebblewhite
Summary: The recovery of carnivore populations in North America has direct and indirect effects on prey populations and their behavior. This study focuses on elk's resource selection patterns in response to the risks posed by wolves and mountain lions. The results show that there is individual-level heterogeneity in resource selection patterns, which may mislead population-level assessments. Furthermore, there is no evidence that individual risk-related resource selection patterns translate into significant changes in body fat or pregnancy rates.
ECOLOGY AND EVOLUTION
(2022)
Article
Ecology
Francisco J. Molina, Justine A. Smith, Emiliano Donadio, Arthur D. Middleton, Jonathan N. Pauli, Jacob R. Goheen
Summary: Prey often modify their antipredator behaviors to balance food acquisition and safety. This study tested the starvation-predation hypothesis and its impact on kill rates in a prey-predator system. The results showed that vicunas decreased their avoidance of canyons and increased selection for meadows during periods of food scarcity, but this change in antipredator behavior did not result in increased kill rates by pumas. These findings contribute to our understanding of the complex dynamics between food limitation and predator-prey interactions within ecosystems.
Article
Biochemistry & Molecular Biology
John A. Erwin, Kenneth A. Logan, Daryl R. Trumbo, W. Chris Funk, Melanie Culver
Summary: This study investigated the effects of hunting on reproduction and genetic diversity in a puma population. The presence of hunting reduced the age of male breeders and decreased the number of unique fathers siring litters. Hunting also increased relatedness among males and decreased relatedness among females in the population, as well as decreased genetic diversity.
Article
Forestry
M. Florencia Urretavizcaya, Viviana Albarracin, Ivonne Orellana, M. Melisa Rago, Pablo Lopez Bernal, Lucas Monelos, Pablo Luis Peri
Summary: This study evaluates the post-fire regeneration of Nothofagus pumilio forests in Patagonia, Argentina, and explores the relationship between the soil seed bank and above-ground vegetation. The results show that the distance from the forest edge affects the germinable seed bank, and suggests the need for active restoration within 15-20 meters from the forest edge to ensure the recovery of the forest structure and functionality.
Article
Reproductive Biology
Audra A. Huffmeyer, Jeff A. Sikich, T. Winston Vickers, Seth P. D. Riley, Robert K. Wayne
Summary: Long-term studies in Southern California have shown that mountain lions have small population sizes and low genetic variation, suggesting inbreeding and potential reproductive issues. This highlights the importance of conservation efforts in the region to prevent further genetic decline.
Article
Multidisciplinary Sciences
John F. Benson, Kyle D. Dougherty, Paul Beier, Walter M. Boyce, Bogdan Cristescu, Daniel J. Gammons, David K. Garcelon, J. Mark Higley, Quinton E. Martins, Anna C. Nisi, Seth P. D. Riley, Jeff A. Sikich, Thomas R. Stephenson, T. Winston Vickers, Greta M. Wengert, Christopher C. Wilmers, Heiko U. Wittmer, Justin A. Dellinger
Summary: Mitigating human-caused mortality for large carnivores is a global challenge for wildlife conservation. This study quantified mortality for mountain lions in California and found that human-caused mortality, mainly from conflict management and vehicles, exceeded natural mortality. It also revealed that human-caused mortality is additive to natural mortality and can reduce population-level survival even when mountain lions are protected from hunting.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Ecology
Katherine A. Zeller, Claudia Wultsch, Lindsay S. Welfelt, Richard A. Beausoleil, Erin L. Landguth
Summary: This study conducted functional connectivity modeling for cougars in Washington, USA using a large genetic dataset. The results showed sex-specific differences in connectivity, with females having lower connectivity and higher resistance compared to males. Males in and around the Olympic Peninsula exhibited higher resistance to movement and lack of connectivity. The models for all cougars incorporated both local and regional dispersal and breeding, highlighting their importance. Considering sex-specific differences is crucial for understanding functional connectivity.
Article
Biodiversity Conservation
Mitchell W. Serota, Pablo A. E. Alarcon, Emiliano Donadio, Arthur D. Middleton
Summary: The loss of terrestrial predators, such as pumas, in Patagonia has resulted in the expansion of Magellanic penguin colonies along the Atlantic coast of Argentina. Surprisingly, recent wildlife conservation efforts have revealed a predator-prey relationship between pumas and penguins. Camera trap observations in Monte Le & PRIME;on National Park showed frequent puma predation on penguins, highlighting the strong ecological linkage between marine and terrestrial ecosystems.
Article
Ecology
Charles H. Prude, James W. Cain
Summary: Research indicates that habitat heterogeneity and corresponding prey diversity may influence the diet composition of pumas, with different habitat conditions leading to varying prey preferences and seasonal changes in diet.
Article
Ecology
Juan Ignacio Zanon Martinez, Miguel Angel Santillan, Jose Hernan Sarasola, Alejandro Travaini
JOURNAL OF ARID ENVIRONMENTS
(2016)
Article
Parasitology
Javier Millan, Alejandro Travaini, Stefania Zanet, Jose Vicente Lopez-Bao, Anna Trisciuoglio, Ezio Ferroglio, Alejandro Rodriguez
PARASITES & VECTORS
(2016)
Article
Geography, Physical
Claudia I. Montalvo, Fernando J. Fernandez, Maximiliano A. Galmes, Miguel A. Santillan, Joaquin Cereghetti
QUATERNARY INTERNATIONAL
(2016)
Article
Ecology
Yanina V. Sica, Gregorio I. Gavier-Pizarro, Anna M. Pidgeon, Alejandro Travaini, Javier Bustamante, Volker C. Radeloff, Ruben D. Quintana
Letter
Ornithology
Jeffrey S. Marks, Miguel A. Santillan, Diego E. Procopio, Alejandro Travaini
JOURNAL OF RAPTOR RESEARCH
(2018)
Article
Biochemistry & Molecular Biology
Alan Fecchio, Jeffrey A. Bell, Rafael B. P. Pinheiro, Victor R. Cueto, Cristian A. Gorosito, Holly L. Lutz, Milene G. Gaiotti, Luciana V. Paiva, Leonardo F. Franca, Guilherme Toledo-Lima, Mariana Tolentino, Joao B. Pinho, Vasyl V. Tkach, Carla S. Fontana, Juan Manuel Grande, Miguel A. Santillan, Renato Caparroz, Andrei L. Roos, Rafael Bessa, Wagner Nogueira, Thiago Moura, Erica C. Nolasco, Kiba J. M. Comiche, Karin Kirchgatter, Lilian O. Guimaraes, Janice H. Dispoto, Miguel A. Marini, Jason D. Weckstein, Henrique Batalha-Filho, Michael D. Collins
Article
Ecology
Javier Millan, Alejandro Travaini, Aitor Cevidanes, Irene Sacristan, Alejandro Rodriguez
INTERNATIONAL JOURNAL FOR PARASITOLOGY-PARASITES AND WILDLIFE
(2019)
Letter
Ornithology
Paula M. Orozco-Valor, Miguel A. Santillan, Marcela Lareschi, Juan M. Grande
JOURNAL OF RAPTOR RESEARCH
(2019)
Letter
Ornithology
Julieta Mallet, Maria Soledad Liebana, Miguel Angel Santillan, Juan Manuel Grande
JOURNAL OF RAPTOR RESEARCH
(2020)
Article
Biodiversity Conservation
Francisco Diaz-Ruiz, Alejandro Rodriguez, Diego Procopio, Sonia Zapata, Juan Ignacio Zanon-Martinez, Alejandro Travaini
Article
Ornithology
Valeria Ojeda, Alejandro Schaaf, Tomas A. Altamirano, Bianca Bonaparte, Laura Bragagnolo, Laura Chazarreta, Kristina Cockle, Raphael Dias, Facundo Di Sallo, J. Tomas Ibarra, Silvina Ippi, Adrian Jauregui, Jaime E. Jimenez, Martjan Lammertink, Fernando Lopez, Maria Gabriela Nunez Montellano, Martin de la Pena, Luis Rivera, Constanza Vivanco, Miguel Santillan, Gerardo E. Soto, Pablo M. Vergara, Amy Wynia, Natalia Politi
Summary: Contrary to predictions, birds in the Southern Hemisphere did not orient their cavities more toward the equator as latitude increased, suggesting that latitude may not be an important factor shaping excavation behavior in South America. Additionally, unimodal cavity-entrance orientations were not common in the analyzed ecoregions, indicating the need for further research on cavity orientation patterns in under-studied regions.
Article
Archaeology
Claudia Montalvo, Fernando J. Fernandez, Rodrigo L. Tomassini, Julian Mignino, Marta S. Kin, Miguel A. Santillan
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2020)
Article
Ecology
Julieta Pedrana, Alejandro Travaini, Juan Ignacio Zanon, Sonia Cristina Zapata, Alejandro Rodriguez, Javier Bustamante