Rohit, Prathibha and Rao, G Syda and Rammohan, K (2008) Yellowfin tuna fishery by traditional fishermen at Visakhapatnam, Andhra Pradesh. Journal of the Marine Biological Association of India, 50 (1). pp. 62-68.
Yellowfin tuna Thunnus albacares in the oceanic waters beyond the depths of 200 m off Visakhapatnam is exploited in recent years by the local fisherfolk. Hooks & line and trolls operated mostly from nonmechanized traditional craft (catamaran) are the main methods of exploitation. The average annual landing of yellowfin tuna by these crafts at Visakhapatnam was 1,515 t during 2004-2006. December followed by May recorded peak catches. A wide size group represented the fishery with the fork length measuring from 30 cm to 175 cm with a major mode at 135 cm. Fishes above 80 cm were found to be mature and the size at first maturity was estimated to be between 85 and 90 cm. Males were dominant with a male: female ratio of 1: 0.53. The length-weight relationship was W= 0.017077L 2.976. Food consisted of fishes (pelagic teleosts), crustaceans (crabs and shrimps) and molluscs (squids). The good returns from the fishery has encouraged the mechanized sector to venture into oceanic tuna fishing. The fishery is still in its infancy and more research has to be carried out to suggest proper management measures.
|Uncontrolled Keywords:||Yellowfin tuna; fisherfolk; management measures; country craft; Visakhapatnam|
|Subjects:||Fishery Technology > Fishing
Demersal Fishes > Tunas
Fish and Fisheries
|Divisions:||CMFRI-Cochin > Marine Capture > Demersal Fisheries
Subject Areas > CMFRI Brochures > CMFRI-Cochin > Marine Capture > Demersal Fisheries
|Depositing User:||Geetha P Mrs|
|Date Deposited:||15 Aug 2010 17:16|
|Last Modified:||09 Sep 2015 15:16|
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