Massa corporal e morfometria de Conopophaga melanops (Aves: Conopophagidae): uma comparação intrasexual e entre áreas continental e insular de Mata Atlântica, na região da Baía da Ilha Grande, RJ

• Autor(a) principal: Silva, Christiano Pinheiro da
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/5816
• topic: Conopophaga melanops; Molecular sexing; Ilha Grande; Rio das Pedras Ecological Reserve; Morphometric comparison; Conopophaga melanops; Confirmação molecular do sexo; Ilha Grande; Reserva Rio das Pedras; Comparação morfométrica; Ave - Morfologia - Ilha Grande, Baía da (RJ); Comportamento sexual dos animais; Pássaro - Ilha Grande, Baía da (RJ); CNPQ::CIENCIAS BIOLOGICAS::ECOLOGIA

Size and shape of a certain organism must characterize ecological aspects, once morphometrics is a result of evolution. Differences on the morphological traits could have been caused by geographical isolation even within short periods of time. Ecological morphology survey is an attempt to understand the relationship between morphological variation and ecology of the animals. Variation in morphometric traits of body size between sexes can be a result of sexual selection. The present study approach intrasexual and mainland-island environment in the morphology of Conopophaga melanops (Vieillot, 1818), been accomplished in an area of Ilha Grande and another in the Rio das Pedras Ecological Reserve (ReRP), RJ State. This species is endemic to the Atlantic Forest and depends to the forest. It has sexual dimorphism, but young individuals have female like plumage. Birds were captured with mist nets and 12 morphometrics traits were measured for 51 individuals. DNA molecular sexing was conducted in 69 blood samples. The percentage of error in field identification of sex by plumage was 9.7%. The molecular sexing is an important tool with potential to reveal demographic patterns in behavior and in reproductive studies of this species. In ReRP Reserve wing length and head and bill variable showed significant difference, being larger in males than in females. Yet in Ilha Grande, the unique variables which showed significant difference were tail length (larger in males) and bill depth at the base (larger in females). The differences in wing length between sexes corroborate with patterns of others Neotropical species. The difference associated to the bill could be related to the feeding ecology of this species. Both females and males were larger on island than in mainland in relation to total body and wing length, the same as tail length in males.