Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil

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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Main Authors: Francisco,Talitha M., Ambrósio,Angela Maria, Balbi,Thiago José, Zuliani,Marina S., Okada,Edson K., Gomes,Luiz C.
Format: Digital revista
Language:English
Published: Museu de Ciências Naturais 2011
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004
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spelling oai:scielo:S0073-472120110003000042012-03-08Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, BrazilFrancisco,Talitha M.Ambrósio,Angela MariaBalbi,Thiago JoséZuliani,Marina S.Okada,Edson K.Gomes,Luiz C. Growth rings pectoral fins von Bertalanffy model Ford-Walford 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.info:eu-repo/semantics/openAccessMuseu de Ciências NaturaisIheringia. Série Zoologia v.101 n.4 20112011-12-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004en10.1590/S0073-47212011000300004
institution SCIELO
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country Brasil
countrycode BR
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libraryname SciELO
language English
format Digital
author Francisco,Talitha M.
Ambrósio,Angela Maria
Balbi,Thiago José
Zuliani,Marina S.
Okada,Edson K.
Gomes,Luiz C.
spellingShingle Francisco,Talitha M.
Ambrósio,Angela Maria
Balbi,Thiago José
Zuliani,Marina S.
Okada,Edson K.
Gomes,Luiz C.
Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
author_facet Francisco,Talitha M.
Ambrósio,Angela Maria
Balbi,Thiago José
Zuliani,Marina S.
Okada,Edson K.
Gomes,Luiz C.
author_sort Francisco,Talitha M.
title Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
title_short Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
title_full Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
title_fullStr Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
title_full_unstemmed Age and growth parameters of cachara Pseudoplastystoma reticulatum (Siluriformes, Pimelodidae) from the Cuiabá River, Brazil
title_sort age and growth parameters of cachara pseudoplastystoma reticulatum (siluriformes, pimelodidae) from the cuiabá river, brazil
description 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.
publisher Museu de Ciências Naturais
publishDate 2011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004
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