Age and growth of the Duckbill Catfish (Sorubim cf. lima) in the Pantanal
The Duckbill Catfish, Sorubim lima, is a predator of large South American rivers. The age and growth of S. lima were studied based on the pectoral fin-spines of samples collected from the Cuiabá River, Pantanal. The samples were taken from commercial and experimental hook-and-line fishing. An analysis of the marginal increment suggests that the growth rings are formed once a year during the dry season, from July to September (ANOVA type I: F = 4.183; g.l. = 3 and 104; p = 0.008). The estimate of the parameters that describe von Bertalanffy's growth curve by nonlinear regression of the observed lengths in the age were: L<FONT FACE=Symbol>¥</FONT> = 56.0 cm (fork length); k = 0.245 year-1; t o = -2.605 years. The animals were estimated to have a life span of 9.6 years. The findings indicate that the fork length is a good predictor of the age of individuals of this fish species.
| Main Authors: | , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Instituto Internacional de Ecologia
2004
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842004000100014 |
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