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Dynamics of Indian chank fisheries

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Relation http://eprints.cmfri.org.in/2550/
 
Title Dynamics of Indian chank fisheries
 
Creator Devaraj, M
Ravichandran, V
 
Subject Molluscan Fisheries
 
Description The demand for chanks from the bangle industry in West Bengal had persisted at about 25 million
chanks per year from the early part of this century to the present. The present supplies, which meet
only about 40% of the demand, come mainly from the Gulf of Mannar. The average annual stock in
the Gulf of Mannar is 2.0 million adult chanks of which 44-83% are exploited. The initial stock size,
however, varies from year to year, and hence, there exists different levels of optimum yields for
different Initial stock sizes. Chank fisheries in Palk Bay and the Coramandal coast yield annually an
average of 49,000 chanks and 24.600 chanks respectively while in Kerala the average annual yield is
20,100 chanks. The average annual stock of chanks in the intertidal Gulf of Kutch is 25,000 of which
only 30.6% is exploited, but additional catch is possible only for the 60 80 mm diameter size chanks
as the y 81 mm diameter size groups ate already well exploited. There is prospect for increasing the
present supplies by introducing SCUBA diving in 20-30 m deep grounds in the Gulf of Mannar and by
exploiting the Gulf of Kutch beyond the Intertidal zone.
 
Publisher CMFRI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2550/1/Article_30.pdf
Devaraj, M and Ravichandran, V (1988) Dynamics of Indian chank fisheries. CMFRI Bulletin, 42(1). pp. 100-105.