Data/hora: 03/06/2024 10:10:37

Provedor de dados: | 76
País: | Brazil
Título: | Diet of the South American frog Leptodactylus ocellatus (Anura, Leptodactylidae) in Uruguay
Autores: | Maneyro,Raúl; Naya,Daniel E.; Rosa,Inés da; Canavero,Andrés; Camargo,Arley.
Data: | 2004-03-01
Ano: | 2004
Palavras-chave: | Trophic niche; Amphibia; Leptodactylus ocellatus; Uruguay.
Resumo: | The diet of Leptodactylus ocellatus (L., 1758) was studied in specimens collected at Maldonado Department (Uruguay), where monthly surveys were made between August 1998 and March 2000. A total of 143 frogs were collected, measured, sexed, and dissected, to assess stomach contents. The anurans were grouped into three age classes and four categories (considering sex and capture date). The trophic amplitude for each age class and sex-season category was quantified using Shannon-Weaver Index, and the trophic niche overlap between ages and categories by using the Pianka Index. Comparisons among treatments were made by G-tests. The most important prey items were coleopterans (IRI = 2547), and significant correlations were found between predator and prey sizes. The major differences on diet composition were found between extreme age classes (froglets and adults). Significant differences were also detected between sexes in the cold season but not in the warm season. Any of these changes in diet may be related with the availability of prey.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000100010
Editor: | Museu de Ciências Naturais
Relação: | 10.1590/S0073-47212004000100010
Formato: | text/html
Fonte: | Iheringia. Série Zoologia  v.94 n.1 2004
Fonte: | info:eu-repo/semantics/openAccess