| Autor: |
C. Linoy Libini, MD.Rafiqul Islam Sarder, K.A. Albert Idu, C.C. Manjumol, V. Kripa, K.S. Mohamed |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Indian Journal of Fisheries. 65 |
| ISSN: |
0970-6011 |
| DOI: |
10.21077/ijf.2018.65.4.44902-08 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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