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Reproduction in edible bivalve shellfishes of Ratnagiri Coast

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Relation http://eprints.cmfri.org.in/2566/
 
Title Reproduction in edible bivalve shellfishes of Ratnagiri Coast
 
Creator Mane, U H
Nagabhushanam, R
 
Subject Molluscan Fisheries
 
Description Clams, oysters and mussels are regularly fished and marketed at different places in Ratnagiri
district throughout year, rarely in peak of monsoon. The annual reproductive cycles of three species
of edible clams Paphia laterisulca, Katelysia opima and Meretrix meretrix, the oysters
Saccostrea cucullata and C. grypholdes and the green mussel Perna virldis of the Ratnagiri coast
have been studied. Maximum gonad index occurs during June-August and November-February in
P. laterisulca, June-September and January-February In K. opima and February-August In M. meretrix.
The histological studies revealed spawning m P. laterisulca during mid September-Match with two
peaks • once in October-November and another In February-March. Spawning in K. opima occurs
during October-November and March-April. M. meretrix spawns only during October-November. S.
cucullata spawns during October-January, and C, grypholdes during October-November. P. virldis
spawns during late July-early September. The difference In such spawning periods of these shellfishes
have be°n attributed to the change* In salinities in the respective habitats with the secondary
cffecta of temperature on the gonads- The results are discussed in the light of species adjustment
to the fluctuating environment and biochemical-phyiiology,
 
Publisher CMFRI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2566/1/Article_41.pdf
Mane, U H and Nagabhushanam, R (1988) Reproduction in edible bivalve shellfishes of Ratnagiri Coast. CMFRI Bulletin, 42(1). pp. 167-176.