Estudo comparativo da morfologia de grupos de híbridos de Callithrixsp. de vida livre em Viçosa, MG

• Autor(a) principal: Fuzessy, Lisieux Franco
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/2266
• topic: Hibridação; Morfometria; Fragmentos florestais de Viçosa; Hybridization; Morphometry; CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA

Hybridization is the interbreeding between individuals from distinct populations resulting in the production of some offspring of mixed ancestry. Natural hybridization is an important evolutionary mechanism that hasbeen reported in the last 25 years for several Neotropical Primate. New World Monkeys show remarkable variation in body size and they have been identified on the basis of a mosaic pelage color. Studies on morphometry of this group are scarce in scientific literature, since most studies have been restricted to body weight analysis and compilation of data originated from old studies. We detected groups of hybrid individuals in Viçosa s forest fragments, described the corporal and facial pelage variation pattern of such individuals and characterize the external morphometry of them. The study involved 79 marmosets (40 hibrid genus Callithrix, 22 C. penicillata and 17 C. geoffroyi). They were captured with a multiple-entrance trap, anesthetized, photographed and measured. Based on the body patterns, we found a uniform color among the hybrid individuals and the faces morphotypes showed five different and intermediate configurations. No morphometrical difference between male and female was found. The three species are statistic similar to Body Length. Among hybrids and C. penicillata we note a similarity in the head measures and the body mass, whereas there is a greater resemblance between the hybrids with C. geoffroyi concerning limbs measures. The existence of the hybrid morphotypes and their high reproductive fitness indicate incomplete reproductive isolation between the species. Those findings provide subvention to identify hybrid individuals with various degrees of introgression at Viçosa s forest fragments. Moreover, present results added some missing data to marmosets classical morphometry, showing external body measurements never studied.