Data/hora: 17/06/2024 02:43:12

Provedor de dados: 	Iheringia Série Zoologia	
País: 	Brazil	
Título: 	Fish assemblages in two sandy beaches in lower Purus river, Amazonas, Brazil	
Autores: 	Duarte,Cleber; Py-Daniel,Lúcia H. Rapp; Deus,Cláudia Pereira de.	
Data: 	2010-12-01	
Ano: 	2010	
Palavras-chave: 	Amazon fish; Nictemeral; Protected areas; Diversity; Abundance.	
Resumo: 	Fish assemblages from two sandy beaches in the lower Purus river (Amazonas, Brazil) were compared. Four sampling groups were represented by: day and night samples in sandy beach inside the Reserva Biológica de Abufari (biological reserve) and day and night samples in the Reserva de Desenvolvimento Sustentável Piagaçu-Purus (sustainable development reserve). Samples were collected during low water levels (November) in 2007. The fish were sampled by means of seines with mesh size of 5 mm between opposing knots, 11 m long and 6 m wide. A total of 112 fish species belonging to nine orders and 27 families was captured. The vast majority of the dominant forms consisted of small fishes (&lt; 100 mm SL) or juveniles. Samples collected in Abufari at night presented more specimens (3,540), higher richness (84 spp.), larger total biomass (76,614 g) and higher diversity (H'= 2.57) than the other groups. The composition of fish assemblages was significantly different among all analyzed groups (ANOSIM, p &lt; 0.0001, R= 0.71). NMDS analysis also clustered all species in four distinct groups according to species composition per period and site. SIMPER analyses showed that 80% of variation of species composition among the groups examined was due to 12 species. However, fish composition did not show any correlation with the abiotic factors examined. Different levels of use in both reserves may explain differences in fish composition.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400006	
Editor: 	Museu de Ciências Naturais	
Relação: 	10.1590/S0073-47212010000400006	
Formato: 	text/html	
Fonte: 	Iheringia. Série Zoologia  v.100 n.4 2010	
Fonte: 	info:eu-repo/semantics/openAccess