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Fishery and Biological Aspects of Yellowfin Tuna Thunnus albacares along Andhra Coast, India

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Title Fishery and Biological Aspects of Yellowfin Tuna Thunnus albacares along Andhra Coast, India
Not Available
 
Creator Ram Mohan,K
Rohit,Prathibha
 
Subject Fishery Aspects
Biological Aspects
Yellowfin Tuna
Thunnus albacares
Andhra Coast
India
 
Description Not Available
A potentially rich fishing ground for yellowfin tuna Thunnus albacares discovered off
northern Andhra Pradesh along the east coast of India at depths of 200m and more is being
gainfully exploited by the local fishers since 2002. Hooks and lines as well as trolls operated
mostly from non-mechanized crafts (catamaran) are the major exploitation methods used. The
mechanized sector ventured into oceanic tuna fishing during 2006 with the conversion of a few
existing mechanized trawlers into long liners and for large scale commercial exploitation of
yellowfin tuna in this region. The average annual (2004-2006) landing of tuna by the catamaran
at Visakhapatnam was 1,515t. A wide size group represented the fishery with the fork length of
T.albacares measuring from 25 cm to 190 cm with major modes at 90 and 130 cm. Fishes above
80 cm were found to be mature and the size at first maturity was estimated to be between 90-95
cm. Males were dominant with a male: female ratio of 1: 0.58. The length weight relationship is
given by the formula W= 0.008634L 3.12. Food contents consisted of a variety of prey animals.
Fishes (bony pelagic fishes), crustaceans (crabs and shrimps) and molluscs (squids) were the
major prey groups. The fishery is still in its infancy and more research has to be carried out to
understand its biology and formulate proper management measures to sustainably harvest this
stock.
Not Available
 
Date 2021-09-15T09:26:03Z
2021-09-15T09:26:03Z
2009
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62426
 
Language English
 
Relation Not Available
 
Publisher Asian Fisheries Soceity; Malaysia