Effect of temperature on yolk sac utilisation and growth of newly hatched larvae of cobia Rachycentron canadum (Linnaeus, 1766)

Sakthivel, M and Jayakumar, R and Nazar, A K A and Tamilmani, G and Ramesh Kumar, P and Kalidas, C and Anbarasu, M and Balamurugan, V and Thiagu, R and Sirajudeen, S and Gopakumar, G (2016) Effect of temperature on yolk sac utilisation and growth of newly hatched larvae of cobia Rachycentron canadum (Linnaeus, 1766). Indian Journal of Fisheries, 61 (3). pp. 135-139.

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    Abstract

    The effect of temperature on the utilisation of yolk-sac and growth in terms of length of the larvae of cobia Rachycentron canadum (Linnaeus, 1766) was investigated. Five temperature levels viz., 29, 30, 31, 32 and 33°C were experimented with the newly hatched larvae for a total duration of 52 hours post-hatch (hph). A clear-cut trend of increase in larval length with increase in temperature was noted. The maximum length recorded was 4.41±0.11 mm at 33°C by the end of the experiment. The yolk-sac volume decreased proportionately with rise in temperature. At the end of 52 hph, the lowest yolk-sac volume was recorded at temperature range of 31 to 33°C. Results of the present study suggest that temperature plays a vital role in the yolk-sac utilisation as well as on growth of cobia larvae.

    Item Type: Article
    Uncontrolled Keywords: Cobia, Larval growth, Rachycentron canadum, Temperature, Yolk-sac
    Subjects: Demersal Fishes > Cobia
    Eggs and Larvae
    Divisions: CMFRI-Mandapam
    Depositing User: Arun Surendran
    Date Deposited: 22 Oct 2016 10:22
    Last Modified: 22 Oct 2016 10:22
    URI: http://eprints.cmfri.org.in/id/eprint/11220

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