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Exploitation of molluscan shell deposits in Vigai estuary at Athankarai

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Relation http://eprints.cmfri.org.in/2527/
 
Title Exploitation of molluscan shell deposits in Vigai estuary at Athankarai
 
Creator Nayar, K Nagappan
Mahadevan, S
Rao, K Satyanarayana
Sivalingam, D
Ramadoss, K
 
Subject Molluscan Fisheries
 
Description Molluscan shell deposits are present in the bed of Vaigai estuary at Athankarai, on the southeast
coast of India, which are being exploited intensively since 1978. The topographical and environmental
features of the estuary, distribution and species composition of shell deposits, extent of resources,
methods of exploitation, magnitude of production and utilization have been studied
The shell deposits are distributed In the bed of estuary over a distance of,4.63 km in the upper
portion of the estuary. They are sub fossil deposits 0 15 m-0.46 m In thickness and comprise predominantly
of Meretrix casta vyhichare favoured as raw material in the manufacture of calcium carbide and In
tannery Industry. Shells of other species in the deposits like Cerithidea fluviatilis, Hemifusus cochlidium,-
Area; Paphia ate. are convarteci into lim^. The annual production of lime shells from the estuary Is about
5.500 t. The removal of large numbers of live adults and seed clams of Meretrix casta present In the upper
layer of sediment along with the sub fossil shells Is pointed, out and the need for preventing the destruction of
live shellfish is stressed,
 
Publisher CMFRI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2527/1/Article_18.pdf
Nayar, K Nagappan and Mahadevan, S and Rao, K Satyanarayana and Sivalingam, D and Ramadoss, K (1988) Exploitation of molluscan shell deposits in Vigai estuary at Athankarai. CMFRI Bulletin, 42 (1). pp. 35-39.