Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil
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| Formato: | Online |
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Universidad de Costa Rica
2011
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/3179 |
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RBT31792022-06-06T18:54:02Z Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil Luís Costa Novaes, José Daniel Carvalho, Edmir mortalidad reproducción alimentación Hoplias malabaricus Alto Paraná producción-por-recluta crecimiento mortality reproduction feeding Upper Paraná yield-per-recruit growth Hoplias malabaricus is a viable economic alternative for artisanal fishermen who used to live on the banks of rivers that now are dammed in Brazil. In order to preserve the species? natural stock, the main objectives of this study were to obtain bio-ecological information on this species reproduction, feeding dynamics and the description of the extent of its exploitation in river-reservoir transition area in Brazil. This way, from January to December 2005, different fishery catches were made with gill nets by artisanal fishermen, and a total of 426 individual H. malabaricus were obtained and sampled. From each specimen, the following biometric and biological data were analyzed: standard length, total weight, stomach contents, reproductive data such as sex, weight and gonadal maturation stage; with these data we estimated sex ratio, reproduction period and feeding habits. To assess growth parameters and infer on the degree of exploitation, the standard length frequency data were analysed using the FISAT (ELEFAN I) computer program. Data revealed a sex ratio of 0.8:1 (M:F), that reproduction occurs all year around, being more intense during spring and summer; it also showed that H. malabaricus is piscivorous. The growth parameters and mortality were estimated at: L8=35.18cm, k=0.32 year, longevity=9.3 years, Z=1.25 years, M=0.63 year and F=0.62 year. The weight-length relationship was: ln Wt=?3.1663+2.7456 ln Lp. The yield-per-recruit analysis produced the following values: E=0.496, Emax=0.916, E0.1=0.701 and E0.5=0.378. Overall, our data suggest that the stock of H. malabaricus is not yet overfished in the studied area. Rev. Biol. Trop. 59 (1): 71-83. Epub 2011 March 01. Universidad de Costa Rica 2011-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/3179 10.15517/rbt.v59i1.3179 Revista de Biología Tropical; Vol. 59 No. 1 (2011): Volume 59 – Regular number 1 – March 2011; 71–83 Revista de Biología Tropical; Vol. 59 Núm. 1 (2011): Volumen 59 – Número regular 1 – Marzo 2011; 71–83 Revista Biología Tropical; Vol. 59 N.º 1 (2011): Volume 59 – Regular number 1 – March 2011; 71–83 2215-2075 0034-7744 10.15517/rbt.v59i1 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/3179/3085 Copyright (c) 2011 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Luís Costa Novaes, José Daniel Carvalho, Edmir |
| spellingShingle |
Luís Costa Novaes, José Daniel Carvalho, Edmir Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| author_facet |
Luís Costa Novaes, José Daniel Carvalho, Edmir |
| author_sort |
Luís Costa Novaes, José |
| title |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| title_short |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| title_full |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| title_fullStr |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| title_full_unstemmed |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| title_sort |
population structure and stock assessment of hoplias malabaricus (characiformes: erythrinidae) caught by artisanal fishermen in river-reservoir transition area in brazil |
| title_alt |
Population structure and stock assessment of Hoplias malabaricus (Characiformes: Erythrinidae) caught by artisanal fishermen in river-reservoir transition area in Brazil |
| publisher |
Universidad de Costa Rica |
| publishDate |
2011 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/3179 |
| work_keys_str_mv |
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