Analysis of bycatches from mid-water trawl fishery targeting ribbonfish Trichiurus lepturus on the north-west coast of India

By-catches in mid-water trawl fishery

Abstract

Commercial trawl fisheries are closely associated with bycatch and discards and it
significantly affects the non-target resources, biodiversity, ecosystem function and habitat.
The present study analysed bycatch based on data obtained from commercially operated
multiday midwater trawlers operating off the north-west coast of India during August
2017-December 2019. The data revealed that bycatch and discards constituted about 53
and 6% respectively of the trawl catch. Mid-water trawl bycatch comprised 92 Teleosts,
8 Cephalopods, 12 Crustaceans and 11 Elasmobranch species. The bycatch is mainly
comprised of cuttlefishes, squids, threadfin breams, sciaenids, bullseye and lizardfishes.
Further, 93.68% of the bycatch consisted of commercially important fish, hence it was
retained in the vessel. The bycatch rate was high in September (72.81±37.44 kg h-1) whereas,
for discards, it was in August (16.25±10.84 kg h-1).

Keywords:
Arabian Sea. Bycatch, Discard, Midwater trawl,
Ribbonfish