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Salinity tolerance and rate of filtration of the pearl oyster Pinctada fucata

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Relation http://eprints.cmfri.org.in/1461/
 
Title Salinity tolerance and rate of filtration of the pearl oyster Pinctada fucata
 
Creator Alagarswami, K
Victor, A C C
 
Subject Pearl oyster
 
Description Salinity tolerance and rate of filtration of the pearl oyster Pinctada fucata were studied during 1975-77. The oysters were experimented in salinities ranging from 14 to 58 %. Although a truly marine form, the pearl oyster has been found to tolerate a wide range of salinity from 24 to 50%, for short durations of 2-3 days. Salinities below and beyond the a ove range caused mortality of oysters. The rate of mortality in the dilutions of 16,15 and
14 %o were 10, 50 and 100% respectively and mortality in higher concentrations of 52, 55 and 58 %o were 67,100 and 100% respectively.
In the normal sea water (salinity 34%,) the removal of neutral red in solution was 52.1 % in 2 hours and 92.6% in 8 hours. The rate of filtration was low in dilutions and
the total filtration was bel w 25 % in the salinities of 14 and 20 %,. In the higher concentrations, filtration was 49.5, 53.7 and 41.8 % in the salinities of 44,50 and 57 %, respectively at the end of 4 hours. In the Gulf of Mannar, where a pearl culture farm is located, the normal salinity
range during 1974-76 was 32.15-35.58 %.. An unusual incidence of dilution of sea water down to 15.69/^, occurred in the farm at Veppalodai in November 1977 due to heavy rainfall and floods m the rivers caused by an active north-east monsoon. However, this did not affect the oysters as the low saline condition did not last for more than a day.
 
Publisher MBAI
 
Date 1976
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1461/1/Alagar_Swami_149-158.pdf
Alagarswami, K and Victor, A C C (1976) Salinity tolerance and rate of filtration of the pearl oyster Pinctada fucata. Journal of the Marine Biological Association of India, 18 (1). pp. 149-158.