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Unequal abundance as a result of unequal vulnerability of species to the gears deployed by Artisanal Fishers in South-western Marine Waters of Côte d’Ivoire, West Africa

Laurent Bahou, Soumaïla Sylla, Konan Gervais N’zi, Célestin Atsé Boua

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J. Bio. Env. Sci.19(4), 63-72, October 2021

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Abstract

Catch data derived from artisanal fishery and collected from October 2017 to December 2018 have been used to estimate sixty-four fish and other fishery resources abundance in connection with the fishing gears with which they had been caught. These gears deployed in continental shelf waters of Côte d’Ivoire by the fishers included the drifting gillnet, stationary gillnet, bottom gillnet, beach seine, purse seine and longline. The results indicated differences in the abundance of each species relating to the gear type. Some species were caught with one fishing gear while others were vulnerable to at least two gears. Additionally, some pelagic species, of which the Sardinellas (e.g. Sardinella aurita Valenciennes, 1847 and S. maderensis (Lowe, 1839)), accounted for the principal species with higher abundance. The drifting gillnet and purse seine proved to be the fishing gears that caught the most specimens, cumulating 43.24% and 34.54% of total number of species landed, respectively. Catches with longline were however more diversified, spanning the pelagic to bottom species. The study also described the environmental conditions of these species through the change in temperature and phytoplankton abundance due to the change in season, which indirectly contributed significantly to varying abundance of species.

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Unequal abundance as a result of unequal vulnerability of species to the gears deployed by Artisanal Fishers in South-western Marine Waters of Côte d’Ivoire, West Africa

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