International Journal of Oceanography & Aquaculture (IJOAC)

ISSN: 2577-4050

Research Article

Effect of Net Colours on Efficiency of Monofilament Gillnets for Catching Some Fish Species in the Lake Volta at Kpong

Authors: Hlordzi V, Akongyuure DN* and Kuebutornye FKA

DOI: 10.23880/ijoac-16000181

Abstract

A net is visible depending on the net colour and the tone variation with its background; it can also be affected by the time of day, and the seasonal changes in water clarity or colour. Fish can differentiate between colours, and also different coloured nets may show significant differences in catches. The main objective of the study was to identify the net colour with the most fish capture. The green net caught the highest number of fishes thus 36 fishes, which consisted of 14 species with a total weight of 3.536 kg, an average length of 22.47 cm. The white net caught the next highest number of fishes; thus 27 fishes, which consisted of nine (9) species with a total weight of 3.743 kg and an average length of 28.69 cm. Eight (8) species, 15 fishes were caught by the brown net which was the least number caught with a total weight of 1.617 kg and an average length of 24.2 cm. Fishers should be educated so they know the colour of net used has an effect on fish catch. Studies should be carried out on the hanging ratio and thickness of the monofilament gillnets to know if it would affect fish catch. Further studies should be carried out on this study for the whole year to check if there would be changes in results. Marcusenius abadii was the species caught most during this experiment, followed by Synodontis ocellifer, Sarotherodon galilaeus, Hemichromis fasciatus, Chrysichthys auratus, Oreochromis niloticus, Clarias gariepinus, Mormyrops anguilloides, Tilapia zillii, Heterotis niloticus, Marcusenius senegalensis, Gymnarchus niloticus, Parachanna obscura, Synodontis bastiani, Chromidotilapia guntheri, Synodontis schall, and Mormyrops breviceps.

Keywords: Gillnet; Operculae; Gilling; Wedged; Entangle

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