Estudio citogenético de 288 Aotus colombianos (1)

Abstract

Cytogenetic data on 288 Colombian Aotus are presented. All of the animals, for wich its exact geographical origin is well-known, are members of an experimental Malaria colony at the Instituto Nacional de Salud, Bogotá, Colombia. The animals were captured in three different geographic locations. Most of them (254) came from San Marcos, Sucre, (down San Jorge Valley, 7º 3D' NL; 74º 06' WL). The first 21 offspring obtained in captivity, were also included. Nine animals came from Río Negro, Antioquia (middle Magdalena valley, 6º 09' NL; 75º 23' WL). Four animals were captured in the west slope of the Andes West chain of Mountains, high Cusiana River, (5º 25' NL; 72º 43' WL). The phenotype of these animals corresponded to the "B" or "grey neck" phenotype. Cytogenetic studies showed the presence of animals 2n=54, 2n=53 and 2n=52 which correspond to the karyotypes KII, KIII and KIV, or the so called kariomorpho 2. It was found that the population of down San Jorge valley was in equilibrium for the frequencies of the three karyotypes. No cytogenetic differences were found in the populations of the down San Jorge and middle Magdalena valleys. The four animals from the west slope of the Andes West Chain of Mountains showed a new karyotype for the genus Aoatus, 2n=58, proposed as karyotype KX.