Vol. 6 (10) pp. 1409-1418 DOI: 10.21474/IJAR01/7950

BIODIVERSITY AND FISH REPRODUCTIVE ASPECTS OF THE SO RIVER IN SOUTHERN BENIN.

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  • Laboratory of Animal Biotechnology and Meat Technology, Department of Animal Health and Production, Polytechnic School of Abomey-Calavi University, 01 BP 2009 Cotonou, Benin Republic.
  • Laboratory of Hydrobiology and Aquaculture, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin.
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Abstract

S? River, located in southern Benin, like other rivers in the country, is subject to human pressure. The aim of this study was to characterize the ichtyofaunal diversity and to evaluate the reproductive aspects of the main species. In total, 11 stations have been sampled on the S? River. Physico-chemical parameters were taken monthly in the morning between 6 am and 11 am and the fish samples were collected twice a month at each station from June to October 2015. The length-weight relationships, condition factor K, gonado-somatic index (GSI) and the sex ratio were evaluated. The physico-chemical parameters showed a great spatio-temporal variation with stratification in two groups in time and space. In total, the inventory revealed 29 fish species belonging to 16 families and 21 genera. The abundant species in the catches were Pellonula leonensis, Coptodon guineensis, Sarotherodon melanotheron, Eleotris vittata and Brevymirus niger. The condition factors evaluated for the 4 species were between 0.74 and 1.93. The average Gonado-Somatic Index for S. melanotheron was 1.8% in June and 7.5% in July while it was 13% in June and 21% in July for Coptodon guineensis. Thus, the results showed that the main species of the river adapt themselves to the pressures on the ecosystem.

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How to Cite This Article

Tobada C. Pamphile, Agblonon Houelome Thierry Matinkpon, Houaga Isidore, Sanni Ad?hinl? Aboudou Rachidi, Youssao A.K.I and Chikou Antoine. (2018); BIODIVERSITY AND FISH REPRODUCTIVE ASPECTS OF THE SO RIVER IN SOUTHERN BENIN., Int. J. of Adv. Res., 6 (10), 1409-1418, ISSN 2320-5407. DOI: https://doi.org/10.21474/IJAR01/7950

Corresponding Author

Issaka A.K. Youssao
Laboratory of Animal Biotechnology and Meat Technology, Department of Animal Health and Production, Polytechnic School of Abomey-Calavi University, 01 BP 2009 Cotonou, Benin Republic
Creative Commons Attribution 4.0 This work is licensed under a Creative Commons Attribution 4.0 International License.