Data/hora: 06/06/2024 00:41:32

Provedor de dados: 	83	
País: 	Brazil	
Título: 	Factors influencing Serrapinnus notomelas (Characiformes: Characidae) populations in upper Paraná river floodplain lagoons	
Autores: 	Piana,Pitágoras Augusto; Gomes,Luiz Carlos; Cortez,Elimaida Mayo.	
Data: 	2006-03-01	
Ano: 	2006	
Palavras-chave: 	Population regulation; Abiotic variables; Competition; Predation.	
Resumo: 	Identification of variables that influence fish populations is one of the main challenges in ecology. To explore this, data were collected quarterly from February 2000 to November 2001 using seines, along the shore of four isolated lagoons of the upper Paraná River floodplain. Serrapinnus notomelas was selected to assess the effect of abiotic and biotic variables using indirect gradient analysis. Abiotic variables were summarized by principal components analysis (PCA) and then the scores of the axis retained for interpretation were correlated with abundances of S. notomelas. Variables that best explained S. notomelas abundance were surface area of the lagoon, total suspended solids and Secchi depth (these last two, indirectly linked to predation). The most relevant biotic variable that determined population size of S. notomelas was predation.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100008	
Editor: 	Sociedade Brasileira de Ictiologia	
Relação: 	10.1590/S1679-62252006000100008	
Formato: 	text/html	
Fonte: 	Neotropical Ichthyology  v.4 n.1 2006	
Fonte: 	info:eu-repo/semantics/openAccess