Abstract (en):
During 2010 and 2011 diurnal and nocturnal surveys were conducted in the drainages of the Meta and Vichada rivers (Colombian Orinoco Basin) to update the information about the conservation status of the Orinoco crocodileâs populations in the wild. Between November 2010 and March 2011 stretches of six watercourses of the Meta river Basin and a stretch of the Vichada river were sampled, covering 2460.3 km, and 199.2 km of nocturnal censuses were traveled. Six observations were made in the Vichada river, corresponding to two individuals (one seen twice, the other seen four times) and crocodile tracks were found on two beaches. Additionally, territorial behavior of one of the individuals observed was registered. No crocodiles were seen in the stretches of the Meta River, or any of its tributaries surveyed. Apparently, the populations in the areas studied have not recovered since 1994-1997, the last time data were obtained, probably due to the annual plundering of nests, the destruction of habitat and the accidental or deliberate death of individuals.
Abstract (es):
Durante fines de 2010 e inicios de 2011 se realizaron muestreos diurnos y nocturnos en las cuencas del río Meta y Vichada (Orinoquia colombiana), con objeto de actualizar la información sobre el estado de conservación de las poblaciones de caimán llanero o cocodrilo de Orinoco (Crocodylus intermedius) en estado silvestre. Entre noviembre de 2010 y marzo de 2011 fueron muestreados 2.460,30 km en varios tramos de seis cursos de agua de la cuenca del río Meta y en un tramo del río Vichada, con 199,20 km de censos nocturnos. En el río Vichada se registraron visualmente dos individuos, el primero en dos ocasiones y el segundo en cuatro, además de la localización de dos rastros en sustrato arenoso. Adicionalmente se registró un comportamiento de territorialidad de uno de los individuos observados. En los tramos del río Meta y de sus afluentes muestreados no se registró ningún individuo ni ningún rastro. Las poblaciones en las zonas estudiadas no parecen haberse recuperado desde que se tomaron los últimos datos de estimación de población en los años 1994-1997, posiblemente por el saqueo anual de nidos, la destrucción de hábitat y la muerte accidental o premeditada de individuos.
Keywords:
Crocodylidae, Nuevos registros, Río Vichada, Comportamiento territorial, Orinoquia, Colombia (es)
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How to Cite
Castro, A., Merchán, M., Gómez, F., Garcés, M. F., & Cárdenas, M. A. (2011). Nuevos datos sobre la presencia de caimán llanero (<em>Crocodylus intermedius<em>) y notas sobre su comportamiento en el río Vichada, Orinoquia (Colombia). Biota Colombiana, 12(1). Retrieved from https://revistas.humboldt.org.co/index.php/biota/article/view/244
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