Fishery and behaviour of banana prawn, Fenneropenaeus merguiensis (de Man,1888) around Mumbai waters
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 2
Abstract
Behaviour of banana prawn, Fenneropenaeus merguiensis is investigated from around Mumbai waters. In inshore waters, the species contributed to the penaeid prawn catch at 44% (barrier net) and 0.8% (bag net). In seasonally operated gill nets the entire catch consisted of this species and in trawl nets, the contribution of the species was <1.0%. However in trawl net the catch was very high during March-May from nearshore and offshore waters. The bag nets are operated in areas with strong tidal currents in Mumbai harbour while barrier nets are set along the banks of Karanja, Dharamtar and Rajpuri creeks. Owing to shoaling behaviour (emigrating behaviour towards offshore) the gill nets are operated in shallow nearshore waters at the end of monsoon for one or two weeks. The juveniles of banana prawn feed in shallow depths close to the banks rather than mid-stream waters of the creeks to avoid strong currents, and here they get caught in barrier nets. The large sized sub-adult and adult prawns which remains in the creeks throughout the rainy season (over-wintering population), and instead of emigrating to the deeper marine waters, display shoaling behaviour at the mouth of the creek and nearshore waters during post-monsoon and get caught by gill nets. While moving in shoals, these sub-adult and adult prawns swim in the bottom, churning the soft bottom mud intermittently, probably to escape from predators. Fishermen easily spot these clouds of muddy water in the calm and clear sea and exploit the prawns by setting their gill nets; however this fishery lasts only for a short period.
Authors and Affiliations
Sushant Mane, VD Deshmukh, Sujit Sundaram
Keywords
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