Browsing Instituto Internacional en Conservación y Manejo de Vida Silvestre by Issue Date
Now showing items 21-40 of 133
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Development of predictive models to explain the distribution of the West Indian manatee Trichechus manatus in tropical watercourses
(Universidad Nacional, Costa Rica., 2005-05-31)Logistic regressions were used to study the relationship between habitat variables and the use of tropical watercourses by the West Indian manatee Trichechus manatus at Northeastern Costa Rica and Southern Nicaragua. ... -
Contribution of live fences to the ecological integrity of agricultural landscapes
(Universidad Nacional, Costa Rica., 2005-08-16)Live fences are conspicuous features of agricultural landscapes across Central America but there is remarkably little information about their abundance, distribution, and function. Here we present a detailed analysis of: ... -
Food niche overlap among neotropical frugivorous bats in Costa Rica
(Universidad Nacional, Costa Rica., 2006)Food habits of 15 species of frugivorous bats were studied at La Selva Biological Station, Costa Rica. Eight hundred and fifty-four (854) fecal samples and 169 samples from fruit parts and seeds discarded by bats beneath ... -
Dung beetle and terrestrial mammal diversity in forests, indigenous agroforestry systems and plantain monocultures in Talamanca, Costa Rica
(Universidad Nacional, Costa Rica., 2006)In order to explore the importance of indigenous agroforestry systems for biodiversity conservation, we compared the abundance, species richness and diversity of dung beetles and terrestrial mammals across a gradient of ... -
Critical condition of the jaguar Panthera onca population in Corcovado National Park, Costa Rica
(Universidad Nacional, Costa Rica., 2007)The jaguar Panthera onca is threatened throughout its range and categorized as Near Threat ened on the IUCN Red List. To inform conservation of the jaguar population in Corcovado National Park, Costa Rica, population ... -
Agroforestry systems conserve species-rich but modified assemblages of tropical birds and bats
(Universidad Nacional, Costa Rica, 2007-05-31)Although an increasing number of studies have shown that diverse, multi-strata agroforestry systems can contribute to the conservation of tropical biodiversity, there is still debate about how the biodiversity within ... -
Immobilization of free-ranging Hoffmann´s two-toed and brown-throated three-toed sloths using ketamine and medetomidine: a comparasion of physiologic parameters
(Universidad Nacional, Costa Rica., 2008)Free-ranging Hoffmann’s two-toed sloths (Choloepus hoffmanni; n526) and brown throated three-toed sloths (Bradypus variegatus; n515) were manually captured and immobilized with 2.5 mg/kg ketamine + 0.02 mg/kg medetomidine ... -
Interbirth interval of a free-ranging jaguar
(Universidad Nacional, Costa Rica., 2009)The 60-kg adult female jaguar was first captured on 25 February 1996 in a box trap baited with shark meat. We monitored her for the next three and a half years, usually locating her by triangulation once or twice a week, ... -
Impacto de la luz artificial sobre la anidación de la tortuga marina Dermochelys coriacea (Testudines: Dermochelyidae), en playa Cipara, Venezuela
(Universidad Nacional, Costa Rica., 2009)Se comparó el número de nidos de tortuga laúd y su distribución espacial entre años con y sin luz artificial, y entre segmentos de playa oscuros e iluminados, en Playa Cipara, Península de Paria, Venezuela. Se entrevistó ... -
Long-term comparison of the fish community in a Costa Rican rocky shore marine reserve
(Universidad Nacional, Costa Rica., 2010)Despite their role in supporting diverse marine fish communities, tropical rocky shores and reefs have attracted less research and fewer targeted conservation efforts compared to coral reefs. We studied fish community ... -
Cetáceos de las aguas costeras del Pacífico norte y sur de Costa Rica
(Universidad Nacional, Costa Rica., 2010)Cetáceos costeros del Pacífico Norte y Sur de Costa Rica. Veintinueve especies de cetáceos ocurren en aguas costarricenses pero sólo se han realizado investigaciones extensivas para tres especies. Esto último demuestra que ... -
Forest structure and territory size relationship in the neotropical understorey insectivore Henicorhina leucosticta
(Universidad Nacional, Costa Rica., 2010)The neotropical terrestrial insectivore Henicorhina leucosticta (Troglodytidae) maintains long-term territories through vocalizations and forages among leaf litter trapped in the understorey vegetation and ground litter. ... -
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 ... -
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 ... -
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 ... -
Temporal and spatial resource use by female three-toed sloths and their young in an agricultural landscape in Costa Rica
(Revista de Biologia Tropical, 2011-12)The information on ecological behavior of wild sloths is very scarce. In this study we determined the home ranges and resources used by three adult female three-toed sloths (Bradypus variegatus) and their four young in ... -
Abundance, size and population structure of whitetip reef sharks, Triaenodon obesus (Carcharhiniformes: Carcharhinidae), in Bahia Chatham, Parque Nacional Isla del Coco, Costa Rica.
(Universidad Nacional, Costa Rica, 2012)Approximately 12 species of shark inhabit at Coco Island National Park (PNIC); some are migratory, such as the hammerhead shark (Sphyrna lewini) and whale shark (Rincodon typus), and others are resident, like the whitetip ... -
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), ... -
Olive ridley mass nesting ecology and egg harvest at ostional beach, Costa Rica
(Chelonian Conservation and Biology, 2012-06)The olive ridley sea turtle (Lepidochelys olivacea), a species listed by the International Union for Conservation of Nature as vulnerable, is characterized by its mass-nesting behavior, also known as arribada. For decades, ...