Yellowfin tuna fishery by traditional fishermen at Visakhapatnam, Andhra Pradesh

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.

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Abstract

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.

Item Type:Article
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
ID Code:2233
Deposited By:Geetha P Mrs
Deposited On:15 Aug 2010 22:46
Last Modified:15 Aug 2010 22:46

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