Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico
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| Formato: | Online |
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Universidad de Costa Rica
2010
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/5432 |
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RBT54322022-06-06T18:38:15Z Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico Peña Messina, Emilio Tapia Varela, Raul Iván Velázquez Abunader, José Araceli Orbe Mendoza, Alma Marcial de Jesús Ruiz Velazco Arce, Javier growth reproduction exploitation rate Oreochromis aureus Aguamilpa Reservoir ELEFAN crecimiento reproducción tasa de explotación embalse de Aguamilpa Tilapia production has increased in Aguamilpa Reservoir, in Nayarit, Mexico, in the last few years and represents a good economic activity for rural communities and the country. We determined growth parameters, mortality and reproductive aspects for 2 413 specimens of blue tilapia Oreochromis aureus in this reservoir. Samples were taken monthly from July 2000 through June 2001, of which 1 371 were males and 1 042 were females. Standard length (SL) and total weight (TW) were measured in each organism. The SL/TW relationships through power models for sexes were determined. The growth parameters L "infinite", k, and t0 of the von Bertalanffy equation were estimated using frequency distribution of length through ELEFAN-I computer program. Finally the reproductive cycle and size of first maturity were established using morph chromatic maturity scale. The results suggested that the males and females had negative allometric growth (b < 3). Significant differences were found between SL/TW model for the sexes, suggesting separate models for males and females. Results indicate that there are no differences in growth rates between sexes; the proposed parameters were L "infinite" =43.33cm standard length, k=0.36/year and t0=-0.43years. Natural and fishing mortality coefficients were 0.83/year and 1.10/year, respectively. The estimated exploitation rate (0.57/year) suggested that during the study period the fishery showed signs of overfishing. Blue tilapia reproduces year-round; the highest activity occurs from January through May and size of first maturity was 23cm SL. We conclude that it is necessary to establish a minimum catch size in this reservoir based on the reproductive behavior of this species Universidad de Costa Rica 2010-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/5432 10.15517/rbt.v58i4.5432 Revista de Biología Tropical; Vol. 58 No. 4 (2010): Volume 58 – Regular number 4 – December 2010; 1577–1586 Revista de Biología Tropical; Vol. 58 Núm. 4 (2010): Volumen 58 – Número regular 4 – Diciembre 2010; 1577–1586 Revista Biología Tropical; Vol. 58 N.º 4 (2010): Volume 58 – Regular number 4 – December 2010; 1577–1586 2215-2075 0034-7744 10.15517/rbt.v58i4 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/5432/5178 Copyright (c) 2010 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 |
Peña Messina, Emilio Tapia Varela, Raul Iván Velázquez Abunader, José Araceli Orbe Mendoza, Alma Marcial de Jesús Ruiz Velazco Arce, Javier |
| spellingShingle |
Peña Messina, Emilio Tapia Varela, Raul Iván Velázquez Abunader, José Araceli Orbe Mendoza, Alma Marcial de Jesús Ruiz Velazco Arce, Javier Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| author_facet |
Peña Messina, Emilio Tapia Varela, Raul Iván Velázquez Abunader, José Araceli Orbe Mendoza, Alma Marcial de Jesús Ruiz Velazco Arce, Javier |
| author_sort |
Peña Messina, Emilio |
| title |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| title_short |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| title_full |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| title_fullStr |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| title_full_unstemmed |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| title_sort |
growth, mortality and reproduction of the blue tilapia oreochromis aureus (perciformes: cichlidae) in the aguamilpa reservoir, mexico |
| title_alt |
Growth, mortality and reproduction of the blue tilapia Oreochromis aureus (Perciformes: Cichlidae) in the Aguamilpa Reservoir, Mexico |
| publisher |
Universidad de Costa Rica |
| publishDate |
2010 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5432 |
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