Data/hora: 28/05/2024 17:30:28

Provedor de dados: 	76	
País: 	Brazil	
Título: 	Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil	
Autores: 	Francisco,Talitha M.; Ambrósio,Angela Maria; Balbi,Thiago José; Zuliani,Marina S.; Okada,Edson K.; Gomes,Luiz C.	
Data: 	2011-12-01	
Ano: 	2011	
Palavras-chave: 	Growth rings; Pectoral fins; Von Bertalanffy model; Ford-Walford.	
Resumo: 	Age and growth parameters of cachara Pseudoplatystoma reticulatum (Eigenmann &amp;amp; Eigenmann, 1889) (Siluriformes, Pimelodidae) (males and females) were estimated through the analysis of growth rings in spines of pectoral fins. Fish were collected from January to December 2007, in the area directly influenced by the Aproveitamento Múltiplo de Manso (APM Manso) and in the Cuiabá River (upper parts of the Pantanal). The maximum number of growth rings was seven for males, and eight, for females. The analysis of temporal variations in mean marginal increment showed that rings found in the spines were formed annually, in December. Growth rings were associated to spawning (in the study region from November to March) of the species. The growth curve in length was obtained by the von Bertalanffy model adjusted by the Ford-Walford transformation. The equations are: Ls = 72.7*[1-e-0.44(t+1.5974)] for males, and Ls = 84.5*[1-e-0.33(t+2.0943)] for females. The equations that describe the growth curve in weight are: Wt = 4991.61*[1-e-0.44 (t+1.5974] 2.70 for males and Wt = 7503.17*[1-e-0.33 (t+2.0943] 2.99 for females.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004	
Editor: 	Museu de Ciências Naturais	
Relação: 	10.1590/S0073-47212011000300004	
Formato: 	text/html	
Fonte: 	Iheringia. Série Zoologia  v.101 n.4 2011	
Fonte: 	info:eu-repo/semantics/openAccess