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Population characteristics and fishery of yellow fin tuna, Thunnus albacares landed along the Gulf of Mannar coast, Tamil Nadu, India

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Relation http://eprints.cmfri.org.in/6067/
 
Title Population characteristics and fishery of yellow fin tuna, Thunnus albacares landed along the Gulf of Mannar coast, Tamil Nadu, India
 
Creator Abdussamad, E M
Pillai, N G K
Balasubramanian, T S
 
Subject Tuna fisheries
Population Dynamics
 
Description Fishery and population characteristics of yellowfin tuna, Thunrlzis ulbucures were
studied. Their annual landings from Gulf of Mannar ecosystem varied between 3 (1991)
and 1,006 t (2003). Annual average production for 1989-1995 was 90 t, 1996-2000 was 326
and 2001-'06 was 635. Catch was constituted by relatively small fishes. Population
parameters such as growth. mortality and exploitation rates were estimated from length
frequency data. Length at first capture was estimated as 52.7 cm, length at first maturity as
71.1 cm and optimum length for exploitation as 96.8 cm. Average standing stock and
spawning stock biomass was 675 t and 455 t respectively. Maximum sustainable yield
(MSY) was estimated as 690 t. Study revealed that yellow fin resource is subjected to
intensive exploitation during 1998-2006. Recruitment pattern indicated that recruitment
occurs almost round the year with peak in May-August with 60.5% of the annual
recruitment. Food and feeding studies show that they feed mainly on pelagic fishes
dominated by carangids, clupeids, beloneids and hemiramphids. Other components in their
food are crustaceans and cephalopods.
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/6067/1/475.pdf
Abdussamad, E M and Pillai, N G K and Balasubramanian, T S (2008) Population characteristics and fishery of yellow fin tuna, Thunnus albacares landed along the Gulf of Mannar coast, Tamil Nadu, India. Egyptian Journal of Aquatic Research, 34 (2). pp. 330-335.