| Titre |
Reproductive ecology and establishment of naturally colonized tilapine cichlid, Sarotherodon galilaeus (Pisces: Actinopterigii: Perciformes) from a man-made lake, Southern Benin, West Africa: implications for sustainable fisheries and aquacultural valor |
| Auteurs |
GBAGUIDI Houehanou MAG [1],
ADITE ALPHONSE [2],
|
| Journal: |
International Journal of Fisheries and Aquatic Studies |
| Catégorie Journal: |
Internationale |
| Impact factor: |
0 |
| Volume Journal: |
4 |
| DOI: |
ISSN: 2347-5129 |
| Resume |
Some aspects of the reproductive ecology of Sarotherodon galilaeus, a freshwater tilapine cichlid, were
examined to evaluate the establishment of the species in the man-made lake of Ahozon (South-Benin). S.
galilaeus individuals were sampled monthly during wet, flood and dry seasons from August/2014 to
July/2015. This species dominated Lake Ahozon and made 85.21% of the fish community. Among the
5,550 individuals sampled, 33.55% were juveniles, 12.25% were sub-adults and 54.20% were adults. S.
galilaeus showed a sex-ratio of (0.60:1) and low batch fecundities (42-1,149 oocytes). Sizes at sexual
maturity (L
50
) in Lake Ahozon were 131 mm and 106 mm for males and females, respectively, and the
species spawned all seasons. The favorable water quality and the life-history strategy between “r” and
“k” selection of S. galilaeus, accounted for its rapid establishment in Lake Ahozon. A sustainable
fisheries/aquaculture exploitation of S. galilaeus in Lake Ahozon requires a holistic management scheme. |
| Mots clés |
Establishment, Fisheries, Life-history, Man-made lake, Spawning seasons |
| Pages |
278 - 287 |
| Fichier |
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