Growth, survival and byssal attachment of the blacklip pearl oyster Pinctada margaritifera (Linnaeus 1758) spat exposed to different salinities

Libini, C L and Albert Idu, K A and Manjumol, C C and Kripa, V and Mohamed, K S (2018) Growth, survival and byssal attachment of the blacklip pearl oyster Pinctada margaritifera (Linnaeus 1758) spat exposed to different salinities. Indian Journal of Fisheries, 65 (4). pp. 68-74.

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    Abstract

    The influence of salinity on growth, survival and byssal fibre attachment of the blacklip pearl oyster, Pinctada margaritifera spat was assessed. P. margaritifera enjoys a coastal distribution in the intertidal reef flats of Andaman and Nicobar Islands, with maximum density at 5 -10 m depth, where drastic changes in environmental parameters such as salinity, temperature and turbidity occur. Spat showed comparatively good growth in terms of instantaneous growth rates (IGRs) of dorso-ventral measurement (DVM), antero-posterior measurement (APM) and total weight (TWT) in a wide range of test salinities from 19 to 37 psu; IGRs were drastically decreased in spat reared at lower and higher salinities outside of this range. The highlight of the present study was better growth performance and 100% survival of P. margaritifera spat at lower salinity levels (22-28 psu) than in the ambient salinity (31 psu). The study also showed that sudden exposure to a higher salinity (above 40 psu) will be helpful for detachment of P. margaritifera spat from settlement tanks in the hatchery to facilitate stress-free spat transfer to sea farming systems. This will be useful in adopting the Japanese technique on post-operative culture for producing high quality pearls from P. margaritifera.

    Item Type: Article
    Uncontrolled Keywords: Blacklip pearl oyster, Byssal attachment, Growth, Pinctada margaritifera, Salinity tolerance, Spat, Survival
    Subjects: Molluscan Fisheries > Pearl oyster
    Divisions: CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    Subject Area > CMFRI-Kochi > Marine Capture > Molluscan Fisheries
    Depositing User: Arun Surendran
    Date Deposited: 09 Jan 2019 04:26
    Last Modified: 23 Feb 2019 06:29
    URI: http://eprints.cmfri.org.in/id/eprint/13349

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