Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria
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Universidad de Costa Rica
2007
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| Online Access: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/6034 |
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RBT60342022-05-30T19:05:50Z Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria Komolafe, O.O. Arawomo, G.A.O. Época de reproducción hábitos de reproducción proporción de sexos índice gonadosomático tilapia fecundidad Oreochromis niloticus. Breeding season breeding habits sex ratio gonadosomatic index fecundity Oreochromis niloticus The fish family Cichlidae has a large diversity and dominates African freshwater bodies, with over 200 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 for collecting the 1 430 specimens were cast netting and gillnetting. Egg diameter varied between 2.12 mm and 2.69 mm with a mean of 2.47±0.02. Female gonadosomatic index was 1.34±0.01 (0.12-4.06, n= 637). The male gonadosomatic index was 0.39±0.02 (0.03-1.67, n= 789). In Opa reservoir, O. niloticus bred throughout the study period. The species was a maternal mouth brooder with the female fish carrying eggs and fry in the buccal cavities. The sex ratio of O. niloticus was approximately 1:1 in the reservoir. The fecundity of the species was between 73 eggs and 1 810 eggs per female with a mean fecundity of 815 eggs. Universidad de Costa Rica 2007-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/6034 10.15517/rbt.v55i2.6034 Revista de Biología Tropical; Vol. 55 No. 2 (2007): Volume 55 – Regular number 2 – June 2007; 595–602 Revista de Biología Tropical; Vol. 55 Núm. 2 (2007): Volumen 55 – Número regular 2 – Junio 2007; 595–602 Revista Biología Tropical; Vol. 55 N.º 2 (2007): Volume 55 – Regular number 2 – June 2007; 595–602 2215-2075 0034-7744 10.15517/rbt.v55i2 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/6034/5739 Copyright (c) 2007 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 |
Komolafe, O.O. Arawomo, G.A.O. |
| spellingShingle |
Komolafe, O.O. Arawomo, G.A.O. Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| author_facet |
Komolafe, O.O. Arawomo, G.A.O. |
| author_sort |
Komolafe, O.O. |
| title |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| title_short |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| title_full |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| title_fullStr |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| title_full_unstemmed |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| title_sort |
reproductive strategy of oreochromis niloticus (pisces: cichlidae) in opa reservoir, ile-ife, nigeria |
| title_alt |
Reproductive strategy of Oreochromis niloticus (Pisces: Cichlidae) in Opa reservoir, Ile-Ife, Nigeria |
| publisher |
Universidad de Costa Rica |
| publishDate |
2007 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/6034 |
| work_keys_str_mv |
AT komolafeoo reproductivestrategyoforeochromisniloticuspiscescichlidaeinopareservoirileifenigeria AT arawomogao reproductivestrategyoforeochromisniloticuspiscescichlidaeinopareservoirileifenigeria |
| _version_ |
1810114583609737216 |