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Population characteristics unravel occurrence of distinct stocks of yellowfin tuna (Thunnus albacares) population in the Indian seas

Indian Agricultural Research Journals

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Title Population characteristics unravel occurrence of distinct stocks of yellowfin tuna (Thunnus albacares) population in the Indian seas
 
Creator E. M. Abdussamad
S. Surya
K. P. Said Koya
Prathibha Rohit
A. M. Abbas
D. Prakasan
Shihab Ismail
 
Subject stocks
yellowfin tuna
genetic stocks
Lakshadweep
 
Description Fishery and biological observations of yellowfin tuna caught from seas surrounding theIndian mainland and its island territories have indicated the presence of biologically distinctstocks in the region. Those caught around the submerged mounts of Chagos-LaccadiveRidge in the Lakshadweep Sea, off Kerala-Karnataka coast exhibit early maturity, small sizeat maturity, short lifespan and a close association with sea mounts. In contrast, those caughtoff other coasts of the mainland, including Andaman waters, exhibit late maturity and largersizes at maturity indicating a fishery dominated by larger-sized individuals. These findingssuggest that the yellowfin tuna associated with the Lakshadweep Sea mounts constitutesa distinct stock, highlighting the necessity for comprehensive genetic, morphometric andpopulation investigations to confirm their stock status.
 
Keywords:Chagos-Laccadive Ridge, Indian mainland,Lakshadweep Sea, Maturity, Stock, Sea mounts,Yellowfin tuna
 
Publisher Central Marine Fisheries Research Institute (on behalf of Indian Council of Agricultural
 
Date 2024-03-31
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJF/article/view/131129
10.21077/ijf.2024.71.1.131129-17
 
Source Indian Journal of Fisheries; Vol. 71 No. 1 (2024)
0970-6011
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJF/article/view/131129/54249
 
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