Data/hora: 02/06/2024 09:40:49

Provedor de dados: | 76
País: | Brazil
Título: | Sex ratio and morphological characteristics of rufous gnateaters, Conopophaga lineata (Aves, Passeriformes) in Atlantic forest fragments
Autores: | Dantas,Gisele P. M.; Santos,Fabrício R.; Marini,Miguel Ângelo.
Data: | 2009-03-01
Ano: | 2009
Palavras-chave: | Forest fragmentation; Sex ratio; Atlantic forest; Conopophagidae.
Resumo: | Unequal sex ratios lead to the loss of genetic variability, decreasing the viability of populations in the long term. Anthropogenic activities often disturb the natural habitats and can cause alterations in sex ratio and morphological characteristics of several species. Forest fragmentation is a major conservation concern, so that understanding its effects in natural populations is essential. In this study, we evaluated the sex ratio and the morphological characteristics of Rufous Gnateaters (Conopophaga lineata (Wied, 1831)) in small and large forest fragments in Minas Gerais, Brazil. Birds (n = 89) were sexed by plumage characteristics and molecular markers. The molecular analysis showed that plumage is not a totally reliable method for sexing Rufous Gnateaters. We observed that sex ratio did not differ between large and small forest fragments, but birds in small fragments had larger wings and tarsus. Wing and tarsus changes may affect the movement ability of individuals within and among forest fragments. In conclusion, Rufous Gnateaters have been able to survive in both small and large Atlantic rain forest fragments without altering their sex ratio, but morphological changes can be prejudicial to their long term survival.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000100017
Editor: | Museu de Ciências Naturais
Relação: | 10.1590/S0073-47212009000100017
Formato: | text/html
Fonte: | Iheringia. Série Zoologia  v.99 n.1 2009
Fonte: | info:eu-repo/semantics/openAccess