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Effect of prey availability on the abundance of White-breasted Wood-Wrens, insectivorous birds of tropical lowland forests
(Universidad Nacional, Costa Rica., 2014)
Some understory insectivorous birds manage to persist in tropical forest fragments despite significant habitat loss and forest fragmentation. Their persistence has been related to arthropod biomass. In
addition, forest ...
Evaluation of Three Methods to Estimate Density and Detectability From Roadside Point Counts
(Universidad Nacional, Costa Rica., 2011)
Roadside point counts are often used to estimate trends of bird populations. The use of aural counts of birds without adjustment for detection probability, however, can lead to incorrect population trend estimates. We ...
External parasites of raptors (Falconiformes and Strigiformes): identification in an ex situ population from Mexico
(Universidad Nacional, Costa Rica., 2011)
Raptorial birds harbor a variety of ectoparasites and the mayority of them are host specific. The aim of this study was to identify the ectoparasites of captive birds of prey from Mexico, as well as to verify their impact ...
20 años de monitoreo de cinco especies indicadoras de la salud del Bosque en el Parque Nacional Corcovado, Costa RicaBiodiversidad
(2013-08-22)
Costa Rica es uno de los países más avanzados en América Latina en cuanto a la protección de áreas silvestres y sus recursos naturales. Sin embargo, los datos acerca de si la mayoría de las áreas boscosas costarricenses ...
Frecuencia de lesiones ocupacionales
(2013-08-22)
Trabajo saludable es un derecho humano. Trabajo saludable también es la base para una economía sana y sostenible. Condiciones de trabajo insalubres y peligrosas causan lesiones y enfermedades en los trabajadores que pueden ...
Conservation value of dispersed tree cover threatened by pasture management
(Universidad Nacional, Costa Rica, 2011)
Trees dispersed in pastures are a prominent feature of many Central American landscapes, particularly in cattle producing regions where farmers retain trees to serve as shade, fodder, timber and firewood. The presence of ...
Effect of extreme climatic events resulting in prolonged precipitation on the reproductive output of sea turtles
(Universidad Nacional, Costa Rica., 2018)
Anthropogenic climate change is predicted to increase the variation in storm patterns in some areas in the coming decades. This variation in mean rainfall and increase in mean temperature could increase the extinction risk ...
Education as a tool for addressing the extinction crisis: Moving students from understanding to action
(Universidad Nacional, Costa Rica., 2010)
Human activity is leading to mass species extinctions worldwide. Conservation biology (CB) courses,
taught worldwide at universities, typically focus on the proximal causes of extinction without teaching students
how ...
Distribution, diet, and vocalizations of the engangered colombian toad Osornophryne Percrssa (Anura, Bufonidae)
(Universidad Nacional, Costa Rica., 2015)
Herein, we describe the distribution, call, diet, and niche model of Osornophryne percrassa. This species has
been recorded at 23 locations of Colombia, 14 of which are reported in this work. In addition, we reported the ...
Abundance, habitat and body measurements of the rare Long-clawed Mouse (Pearsonomys annectens) in the coastal temperate rainforest of southern Chile
(Studies on Neotropical Fauna and Environment, 2012)
Based on rodent trappings in eight localities from 1998 to 2005 (14,984 trap-nights), we provide detailed information on abundance, habitat and additional body measurements of the Long-clawed Mouse (Pearsonomys annectens), ...