Instituto Internacional en Conservación y Manejo de Vida Silvestre

URI permanente para esta comunidadhttp://10.0.96.45:4000/handle/11056/14849

El Instituto Internacional de Conservación y Manejo de Vida Silvestre (ICOMVIS)genera y transfiere conocimiento y forma recurso humano mediante la investigación, educación y extensión en el campo de la conservación y manejo de vida silvestre y su relación con el ser humano en el Neotrópico, a través de acciones inter y multidisciplinarias que integran aspectos teóricos y prácticos para la conservación de la vida silvestre.

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Página web: www.icomvis.una.ac.cr

Correo: icomvis@una.cr

Teléfono: (506) 2277-3922

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Mostrando 1 - 4 de 4

Characterization of attack events on sea turtles (chelonia mydas and lepidochelys olivacea) by jaguar (panthera onca) in naranjo sector, santa rosa national park, Costa Rica
(International Journal of Conservation Science, 2016-01) Carrillo, Eduardo
In this study, we examined sea turtles consumption by jaguars and their temporal and spatial distribution at Naranjo beach, Santa Rosa National Park Costa Rica. We include information about sea turtle consumption rate by jaguars and whether this represents a threat to the population on the study area. We monitor jaguar predatory behavior on the sea turtles Lepidochelys olivacea and Chelonia mydas between August 2012 and September 2013. We located predation events and measured all turtles preyed carapace width (ACC) and length (LCC). Mean ACC of killed turtles was lower than the ACC population mean. Killed turtles LCC mean and population mean were the same. The beach was not used uniformly as sea turtle hunting area and it was shared by at least three jaguars. Jaguar hunting impact on sea turtle populations is very small in comparison to fishing by-catch. C. mydas and L. olivacea are important jaguar food source because they are easy to hunt and they have a high biomass. Sea turtles can be key preys when other prey availability is low and/or the period when female jaguars are feeding their cubs.
Factors affecting Jaguar and Puma predation on livestock in Costa Rica
(Wildlife Biology in Practice, 2016-06) Carrillo, Eduardo
Throughout their range, wild felids in the Americas prey on livestock and this sometimes leads to retaliatory killing. Recently, conservation and research programs focused on such conflicts have recommended mitigation and prevention measures to producers, but these programs sometimes lack guidelines to direct implementation. We developed an index of risk of felid predation on cattle based on data from 52 ranches in Northwest Costa Rica. We evaluated the following as potential indicators of risk: climate, proximity to protected areas, distance to riparian forest, and wildlife occurrence as landscape factors, and cattle management efforts, and average livestock weight as anthropogenic factors. As a result, the index was defined as a hierarchical classification of these variables that provides a planning tool to identify and address the vulnerability of livestock at cattle ranches to felid predation events.
Inter-trophic food provisioning between sea and land: The jaguar (panthera onca) as provider of sea turtle carcasses to terrestrial scavengers
(International Journal of Conservation Science, 2017-07-10) Carrillo, Eduardo; Gil Fernández, Margarita; Wong, Grace; Fonseca, Luis
A more complete perspective of carrion use by terrestrial vertebrates and about the role of predators in net carrion supply will improve our understanding of critical ecological processes, particularly those associated with energy flow and trophic interactions. Therefore, the aims of this work were: 1) to record the scavenger species which are benefited indirectly by the predator-prey relationship between jaguars and sea turtles, and 2) to evaluate the influence of activity of vultures on the feeding behavior of the jaguar on sea turtles. During the study period a total of 24 predation events on sea turtles by jaguars were recorded at Nancite beach, Costa Rica. We recorded a total of 11 vertebrate species scavenging on sea turtle carcasses. In this paper, we found that the number of days that the jaguars fed on a sea turtle carcass was correlated with the number of days that the vultures took to find the sea turtle carcass. Our work concluded that the ecological value of jaguars as a top predator, flag, umbrella and keystone species includes their role as a provider of carcasses to scavengers.
Scavenging on sea turtle carcasses by multiple jaguars in northwestern Costa Rica
(Therya, 2016) Carrillo, Eduardo; Escobar- Lasso, Sergio; Gil-Fernández, Margarita; Herrera, Hansel; Fonseca, Luis G.; Sáenz, Joel; Wong, Grace
Information on scavenging by jaguars is scarce, dispersed and little documented in the scientific literature, producing a shallow understanding of this phenomenon. Therefore, the aim of this paper is to describe the behavior of multiple jaguars scavenging on single carcasses of olive ridley sea turtles (Lepidochelys olivacea) that died by jaguar predation. The study was conducted at two beaches (Naranjo and Nancite) within the Santa Rosa National Park, Costa Rica. We carried out morning walks on Naranjo and Nancite beaches. We set up camera traps to capture the full extent of the feeding behavior on fresh jaguar-predated turtles. We recorded two scavenging events. The jaguars involved in the two scavenging events dragged or tried to drag the sea turtle carcass to a new location. This behavior could suggest the presence of intraspecific kleptoparasitism. However, further investigation of this type is required to determine the existence of kleptoparasitism, and also to get a deeper understanding of scavenging in jaguars and its relation to prey availability.

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