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First experience in the larviculture of cobia, Rachycentron canadum (Linnaeus, 1752) in India

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Relation http://eprints.cmfri.org.in/8932/
 
Title First experience in the larviculture of cobia, Rachycentron canadum
(Linnaeus, 1752) in India
 
Creator Gopakumar, G
Nazar, A K A
Tamilmani, G
Sakthivel, M
Kalidas, C
Ramamoorthy, N
Palanichamy, S
Maharshi, V Ashok
Rao, K Srinivasa
Rao, G Syda
 
Subject New record
Cobia
Mariculture
Eggs and Larvae
 
Description Cobia aquaculture has been gaining momentum internationally and has spread to more than 23 countries, half of them in the
Asia-Pacific region. Envisaging the prospects of cobia farming in India, broodstock development was initiated and the first
successful induced breeding was achieved in March 2010. Larviculture was experimented in Fibre Reinforced Plastic (FRP)
tanks as well as Reinforced Cement Concrete (RCC) tanks and protocols were evolved. Green water technique employing
the microalga, Nannochloropsis oculata was used. The critical stage for the larvae was from 5 to 9 days post-hatch (dph),
when cumulative mortality reached around 90%. Enriched rotifers were fed from 3 to 10 dph and enriched Artemia nauplii
from 9 to 18 dph. Weaning with larval inert feed was initiated from 18 dph and grading was carried out once in four days to
avoid cannibalism. The study was conducted for 31 days and the final larval survival noted in the FRP and RCC tanks were
2 and 1%, respectively. At the end of the experiment, the specific growth rate of larvae in the FRP system was 30.1% of body
weight per day, while the same in RCC tank was 28.3% of body weight per day. The low survival and specific growth rate
of larvae in the RCC tanks could be attributed to the low densities of live feed maintained. The present experience indicated
that cobia seed production can be successfully practised and by refining the methodology, the survival and growth can be
enhanced to achieve commercial level fingerling production.
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/8932/1/G_Gopakumar1.pdf
Gopakumar, G and Nazar, A K A and Tamilmani, G and Sakthivel, M and Kalidas, C and Ramamoorthy, N and Palanichamy, S and Maharshi, V Ashok and Rao, K Srinivasa and Rao, G Syda (2012) First experience in the larviculture of cobia, Rachycentron canadum (Linnaeus, 1752) in India. Indian Journal of Fisheries, 59 (1). pp. 59-63.