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

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.

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Abstract

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.

Item Type:	Article
Uncontrolled Keywords:	Cobia; Feeding protocol; Larviculture; Rachycentron canadum; Specific growth rate
Subjects:	Marine Fisheries > Fish landing > New record Demersal Fishes > Cobia Aquaculture > Mariculture Eggs and Larvae
Divisions:	CMFRI-Mandapam
Depositing User:	Arun Surendran
Date Deposited:	10 Apr 2012 09:22
Last Modified:	06 Dec 2022 07:10
URI:	http://eprints.cmfri.org.in/id/eprint/8932

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