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Larval development and seed production in the 'whelk' Babylonia spirata

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Relation http://eprints.cmfri.org.in/2014/
 
Title Larval development and seed production in the 'whelk' Babylonia spirata
 
Creator Sreejaya, R
Mohan, Anjana
Laxmilatha, P
Appukuttan, K K
 
Subject Gastropods
 
Description The larval development of the whelk, Babylonia spirata (Linnaeus, 1758) (Neogastropoda: Buccinidae) which forms a major component of the bycatches of shrimp trawlers of south- west coast of India was studied and its seed production techniques were developed. The broodstock, which were conditioned at low temperature of 26 - 28OC, spawned intermittently between January to April, and again during September to December, 2002. Each spawner laid an average 35 transparent egg capsules, which were firmly attached to the substratum by a slender stalk. Fertilized eggs of 260 to 280pm diameter started their development within the
transparent egg capsule itself by spiral cleavage and progressively developed into morula, blastula, trochophore and veliger stages. The larvae hatched out as veliger between the 7th and 8th day after spawning and these were reared in the hatchery. Percentage of survival, feeding rate and settling percentage of the larvae were studied in detail. Optimum stocking density of the larvae was found to be 150/1 which resulted in 65% settlement of the larvae.
Chaetoceros calcitrans was given as feed till settling stage and after that the juveniles were fed with shrimp meat. Details of the spawning, morphology of capsule and growth of the larvae are presented in the paper.
 
Publisher MBAI
 
Date 2004
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2014/1/Sreejaya_64-72.pdf
Sreejaya, R and Mohan, Anjana and Laxmilatha, P and Appukuttan, K K (2004) Larval development and seed production in the 'whelk' Babylonia spirata. Journal of the Marine Biological Association of India, 46 (1). pp. 64-72.