Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus
The techniques for induced breeding of Clarias gariepinus has been developed and mastered by fish breeders. There is however no record of successful induced breeding of Heterotis niloticus in captivity. In this study, the reproductive indices of the ovaries, of the two fish species were compared. The ovaries of sexually matured samples were extracted and their weights measured. The mean gonadosomatic index (GSI) of C. gariepinus was 3.94% while that of H. niloticus was 1.61 %. The mean condition factor (K) was 5.28 in C. gariepinus while it was 2.03 in H. niloticus. Gonad and body weight relationship was positively correlated in both species (r = 0.69 in C. gariepinus and r = 0.37 in H. niloticus. Also, an inverse relationship existed between the body weight and GSI in the two species (r = -0.3 5 inC. gariepinus and r = -0.06 in H. niloticus.
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Language: | English |
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FISON
2008
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Subjects: | Aquaculture, Clarias gariepinus, Heterotis niloticus, Nigeria, Ibadan, freshwater environment, Reproduction, Gonadosomatic index, Morphometry, |
Online Access: | http://hdl.handle.net/1834/37980 |
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dig-aquadocs-1834-379802021-07-13T03:15:44Z Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus Omeje, V.O. Olufemi, B.E. Madu, C.T. Nnaji, J.C. Musa, Y.M. Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry The techniques for induced breeding of Clarias gariepinus has been developed and mastered by fish breeders. There is however no record of successful induced breeding of Heterotis niloticus in captivity. In this study, the reproductive indices of the ovaries, of the two fish species were compared. The ovaries of sexually matured samples were extracted and their weights measured. The mean gonadosomatic index (GSI) of C. gariepinus was 3.94% while that of H. niloticus was 1.61 %. The mean condition factor (K) was 5.28 in C. gariepinus while it was 2.03 in H. niloticus. Gonad and body weight relationship was positively correlated in both species (r = 0.69 in C. gariepinus and r = 0.37 in H. niloticus. Also, an inverse relationship existed between the body weight and GSI in the two species (r = -0.3 5 inC. gariepinus and r = -0.06 in H. niloticus. Includes:- 2 tables.;15 refs. 2021-06-24T18:09:15Z 2021-06-24T18:09:15Z 2008 conference_item TRUE http://hdl.handle.net/1834/37980 en http://www.fison.org.ng/ application/pdf application/pdf 280 - 283 FISON Lagos, Nigeria http://aquaticcommons.org/id/eprint/23255 19325 2018-03-25 14:40:53 23255 Fisheries Society of Nigeria |
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Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry |
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Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry Omeje, V.O. Olufemi, B.E. Madu, C.T. Nnaji, J.C. Musa, Y.M. Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
description |
The techniques for induced breeding of Clarias gariepinus has been developed and mastered by fish breeders. There is however no record of successful induced breeding of Heterotis niloticus in captivity. In this study, the reproductive indices of the ovaries, of the two fish species were compared. The ovaries of sexually matured samples were extracted and their weights measured. The mean gonadosomatic index (GSI) of C. gariepinus was 3.94% while that of H. niloticus was 1.61 %. The mean condition factor (K) was 5.28 in C. gariepinus while it was 2.03 in H. niloticus. Gonad and body weight relationship was positively correlated in both species (r = 0.69 in C. gariepinus and r = 0.37 in H. niloticus. Also, an inverse relationship existed between the body weight and GSI in the two species (r = -0.3 5 inC. gariepinus and r = -0.06 in H. niloticus. |
format |
conference_item |
topic_facet |
Aquaculture Clarias gariepinus Heterotis niloticus Nigeria Ibadan freshwater environment Reproduction Gonadosomatic index Morphometry |
author |
Omeje, V.O. Olufemi, B.E. Madu, C.T. Nnaji, J.C. Musa, Y.M. |
author_facet |
Omeje, V.O. Olufemi, B.E. Madu, C.T. Nnaji, J.C. Musa, Y.M. |
author_sort |
Omeje, V.O. |
title |
Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
title_short |
Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
title_full |
Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
title_fullStr |
Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
title_full_unstemmed |
Comparative studies on the reproductive indices of the ovaries of Clarias gariepinus and Heterotis niloticus |
title_sort |
comparative studies on the reproductive indices of the ovaries of clarias gariepinus and heterotis niloticus |
publisher |
FISON |
publishDate |
2008 |
url |
http://hdl.handle.net/1834/37980 |
work_keys_str_mv |
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_version_ |
1756079697688526848 |