Record Details

Spawning, larval development and spat settlement in the Venus clam Gafrarium tumidum (Roding, 1798) from south-east coast of India

CMFRI Repository

View Archive Info
 
 
Field Value
 
Relation http://eprints.cmfri.org.in/8667/
 
Title Spawning, larval development and spat settlement in the Venus clam Gafrarium tumidum (Roding, 1798) from south-east coast of India
 
Creator Jagadis, I
 
Subject Eggs and Larvae
Clam
 
Description Induced spawning, larval development and spat settlement of the venus clam Gafrarium tumidum (Roding, 1798) were
studied. Brood clams (27.5-32.8 mm dorsoventral measurement / 5.3-15.8 g) collected from the natural bed were conditioned
(24.0 -26.0 °C; 33.5-34.5 ppt) and subjected to thermal stimulation for spawning. Fertilised eggs were spherical in shape and

measured, on an average 62 μm in diameter. Day one veliger larvae of mean size 91 ± 1.69 μm transformed into umbo stage
on day 7 at a size of 149 ± 6.02 μm, pediveliger on day 11 at 180 ± 6.0 μm size developed functional foot which settled on day
13 at a size of 200 ± 6.945 μm. The growth of post-set clams was monitored and described upto 68 days and the growth
equation was derived. Few surviving post-set clams transformed into juveniles and radial ribs were observed with naked eye
when they were 2.3 mm in 75 days. These clams reached 6.4 mm in 165 days. Metamorphosis and larval growth are
compared with that of other bivalve species reported earlier. Further, specific refining of methodology for post-set clam
rearing would pave way for their mass seed production for aquaculture purpose.
 
Date 2011
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8667/1/1613_-_I._Jagadis.pdf
Jagadis, I (2011) Spawning, larval development and spat settlement in the Venus clam Gafrarium tumidum (Roding, 1798) from south-east coast of India. Indian Journal of Fisheries, 58 (2). pp. 1-5.