| Registro completo |
| Provedor de dados: |
Iheringia, Sér. Zool.
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| País: |
Brazil
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| Título: |
Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
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| Autores: |
Francisco,Talitha M.
Ambrósio,Angela Maria
Balbi,Thiago José
Zuliani,Marina S.
Okada,Edson K.
Gomes,Luiz C.
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| Data: |
2011-12-01
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| Ano: |
2011
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| Palavras-chave: |
Growth rings
Pectoral fins
Von Bertalanffy model
Ford-Walford
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| Resumo: |
Age and growth parameters of cachara Pseudoplatystoma reticulatum (Eigenmann & 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004
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| Editor: |
Museu de Ciências Naturais
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| Relação: |
10.1590/S0073-47212011000300004
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| Formato: |
text/html
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| Fonte: |
Iheringia. Série Zoologia v.101 n.4 2011
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| Direitos: |
info:eu-repo/semantics/openAccess
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