Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria
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| Format: | Artículo científico |
| Language: | en |
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Universidad de Costa Rica
2007
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| author | O.O. Komolafe |
| author_facet | O.O. Komolafe |
| contents | Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria O.O. Komolafe G.A.O. Arawomo Biología sex ratio fecundity breeding season breeding habits gonadosomatic index The fish family Cichlidae has a large diversity and dominates African freshwater bodies, with over200 species reported in inland waters. Sampling for the fish Oreochromis niloticus (Linnaeus) in Opa reservoir,Nigeria, started in October 1997 and extended until February 2000. The fishing methods employed forcollecting the 1 430 specimens were cast netting and gillnetting. Egg diameter varied between 2.12 mm and2.69 mm with a mean of 2.47±0.02. Female gonadosomatic index was 1.34±0.01 (0.12-4.06, n= 637). Themale gonadosomatic index was 0.39±0.02 (0.031.67, n= 789). In Opa reservoir, O. niloticus bred throughoutthe study period. The species was a maternal mouth brooder with the female fish carrying eggs and fry inthe buccal cavities. The sex ratio of O. niloticus was approximately 1:1 in the reservoir. The fecundity of thespecies was between 73 eggs and 1 810 eggs per female with a mean fecundity of 815 eggs. Rev. Biol. Trop.55 (2): 595-602. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44955220 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.55 |
| format | Artículo científico |
| id | redalyc_44955220 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria O.O. Komolafe Biología sex ratio fecundity breeding season breeding habits gonadosomatic index Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria O.O. Komolafe G.A.O. Arawomo Biología sex ratio fecundity breeding season breeding habits gonadosomatic index The fish family Cichlidae has a large diversity and dominates African freshwater bodies, with over200 species reported in inland waters. Sampling for the fish Oreochromis niloticus (Linnaeus) in Opa reservoir,Nigeria, started in October 1997 and extended until February 2000. The fishing methods employed forcollecting the 1 430 specimens were cast netting and gillnetting. Egg diameter varied between 2.12 mm and2.69 mm with a mean of 2.47±0.02. Female gonadosomatic index was 1.34±0.01 (0.12-4.06, n= 637). Themale gonadosomatic index was 0.39±0.02 (0.031.67, n= 789). In Opa reservoir, O. niloticus bred throughoutthe study period. The species was a maternal mouth brooder with the female fish carrying eggs and fry inthe buccal cavities. The sex ratio of O. niloticus was approximately 1:1 in the reservoir. The fecundity of thespecies was between 73 eggs and 1 810 eggs per female with a mean fecundity of 815 eggs. Rev. Biol. Trop.55 (2): 595-602. Epub 2007 June, 29. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44955220 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.55 |
| title | Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| topic | Biología sex ratio fecundity breeding season breeding habits gonadosomatic index |
| url | https://www.redalyc.org/articulo.oa?id=44955220 |