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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2019, Vol. 7, Issue 6, Part B

Size structure, fecundity and reproductive period of Malapterurus electricus (Gmelin, 1789) (Siluriformes: Malapteruridae) in the dam lake of Buyo (Côte d'Ivoire)


Author(s): Kouassi HKD, Kamelan TM, Djadji ELG, Berté S and Kouamélan EP

Abstract: The present study determined the morphometric characteristics, fecundity and reproductive period of Malapterurus electricus, species of ecological and economic interest in order to assess its aquaculture potential and contribute to its conservation due to the fishing pressure. A total of 325 specimens were monthly sampled from August 2017 to July 2018. 188 males (average body weight 134. 89 ± 82.90 g and average height (SL) 17.02 ± 3.32 cm) and 137 females (average weight 140. 84 ±7 6.23 g and average height (SL) 17.18 ± 3.26 cm) were examined. The distribution of the size frequency showed an unimodal structure of modal class 16 to 18 cm. The length-weight relationship showed that whatever the sex, Malapterurus electricus presents a minor allometry. The overall sex ratio (F/M) (1: 1.37; χ² = 1.71; p-value > 0.05) is in favour of males. The first sexual maturity sizes of 15.27 cm and 15.90 cm (SL) were determined for females and males, respectively. The estimated mean condition factor (Kc) is 2.53 ± 0.34 for females and 2.46 22 ± 0.39 for males. The breeding season of Malapterurus electricus runs from April to November. The absolute fecundity determined, ranges from 1016 to 3761 oocytes with an average value of 1813 24 ± 895 oocytes.

Related Graphics: Click here for more related graphics:

Monthly evolution of the mean gonado-somatic ratio and the percentage of mature females of <em>Malapterurus electricus</em> captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)
Fig. 1: Monthly evolution of the mean gonado-somatic ratio and the percentage of mature females of Malapterurus electricus captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)
Monthly evolution of the mean condition factor (Kc) in males and females of <em>Malapterurus electricus</em> captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)
Fig. 2: Monthly evolution of the mean condition factor (Kc) in males and females of Malapterurus electricus captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)
Evolution of the proportion of mature individuals in accordance with the standard length in females and males of <em>Malapterurus electricus</em> captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)
Fig. 3: Evolution of the proportion of mature individuals in accordance with the standard length in females and males of Malapterurus electricus captured from August 2017 to July 2018 in the dam lake of Buyo (Côte d'Ivoire)


Pages: 94-103  |  172 Views  24 Downloads

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How to cite this article:
Kouassi HKD, Kamelan TM, Djadji ELG, Berté S, Kouamélan EP. Size structure, fecundity and reproductive period of Malapterurus electricus (Gmelin, 1789) (Siluriformes: Malapteruridae) in the dam lake of Buyo (Côte d'Ivoire). Int J Fish Aquat Stud 2019;7(6):94-103.
International Journal of Fisheries and Aquatic Studies