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| Francisco,Talitha M.; Ambrósio,Angela Maria; Balbi,Thiago José; Zuliani,Marina S.; Okada,Edson K.; Gomes,Luiz C.. |
| 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Growth rings; Pectoral fins; Von Bertalanffy model; Ford-Walford. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000300004 |
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| Lizama,Maria de los Angeles Perez; Ambrósio,Angela Maria. |
| The length/weight relationships are described for Astyanax bimaculatus, A. schubarti, Aphyocharax nasutus, Cheirodon notomelas, Hyphessobrycon callistus, Hemigrammus marginatus, Moenkhausia intermedia, M. sanctae-filomenae and Roeboides paranensis of tropical freshwater fishes in the high Paraná River floodplain. The fishes were caught over a period of 12 month (March 1993 to February 1994). The equations of the length/weight relationships for each species were: Wt=0.0235.Ls3.13; Wt=0.0162.Ls2.89; Wt=0.0179.Ls3.11; Wt=0.0199.Ls3.09; Wt=0.0183.Ls3.10; Wt=0.0140.Ls3.14; Wt= 0.0200.Ls3.21 and Wt=0.0101.Ls3.21, respectively. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Length/weight relationships; Characidae; Floodplain; Paraná River. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300015 |
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