Data/hora: 12/06/2024 10:16:21

Provedor de dados: 	76	
País: 	Brazil	
Título: 	Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs	
Autores: 	Lopes,Vanessa G.; Nessimian,Jorge L.; Da-Silva,Elidiomar R.; Gomes,José Henrique C.; Dias,Ana Carolina I. M.; Souza,Leonardo C.; Branco,Christina W.C.	
Data: 	2016-01-01	
Ano: 	2016	
Palavras-chave: 	Feeding resources; Land-water ecotone; Trophic ecology; Ast yanax aff. bimaculatus; Astyanax parahybae.	
Resumo: 	Abstract Food flexibility and omnivory are important features pronounced in Neotropical freshwater fish species, particularly for Astyanax species. Traditionally most fish diet resources are known to be originated in the aquatic environment, however recent studies have pointed to the importance of allochthonous sources. Besides, the colonization of macrophytes, common at several tropical reservoirs, may enhance insectivory in fish diet expanding or concentrating the area of available resources for feeding. Here we employed stomach contents analysis of two sympatric Astyanax species to access the importance of habitat differentiations as spatial complexity in two tropical reservoirs with different environmental features. The NMDS analysis indicated separation in the diet of these species between reservoirs (Stress= 8.28%). Additionally, analysis of variance revealed a significative difference in the volume of food itens ingested between the reservoirs (Anova one-way F(1, 132)=4.4446; p= 0.037). This points out the importance of environmental conditions on the composition of the diet of fishes. This study highlighted the insectivorous feeding habit of Astyanax species and revealed different feeding strategies between sympatric fishes despite high niche overlap in both environments. Habitat heterogeneity increasing food resources availability plays an important role in the diet strategy of these Astyanax species and on their constant maintenance in the two different reservoirs.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212016000100212	
Editor: 	Museu de Ciências Naturais	
Relação: 	10.1590/1678-4766e2016012	
Formato: 	text/html	
Fonte: 	Iheringia. Série Zoologia  v.106 2016	
Fonte: 	info:eu-repo/semantics/openAccess