Data/hora: 03/06/2024 06:21:59

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park	
Autores: 	Neves,Mayara Pereira; Delariva,Rosilene Luciana; Wolff,Luciano Lazzarini.	
Data: 	2015-03-01	
Ano: 	2015	
Palavras-chave: 	Feeding ecology; Iguaçu River basin; Morphotypes; Niche overlap; Stream fishes.	
Resumo: 	This study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individuals belonging to seven species were analyzed by the volumetric method, and the ecomorphological traits of 30 specimens of each species were estimated. The main food items consumed were detritus, aquatic and terrestrial insects, and other aquatic invertebrates. We observed low levels of trophic niche breadth and diet overlap between most species. The PCA scores indicated the occurrence of three ecomorphotypes. PCA axis 1 segregated at one extreme, species with dorsoventrally depressed bodies, longer caudal peduncles, and well-developed swimming fins; and at the other extreme, species with compressed bodies and peduncles, and relatively larger eyes and anal fins. PCA axis 2 segregated species with elongated bodies and ventrally oblique mouths. The partial Mantel test revealed a significant correlation between diet and morphology, indicating independence from the phylogeny. The patterns observed suggest that the low richness did not result in a broadening of the species' trophic niches, or in the absence of some of the main ecomorphotypes expected.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100245	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/1982-0224-20140124	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.13 n.1 2015	
Fonte: 	info:eu-repo/semantics/openAccess