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Influence of algal cell concentration, salinity and body size on the filtration and ingestion rates of cultivable Indian bivalves

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Title Influence of algal cell concentration, salinity and body size on the filtration and ingestion rates of cultivable Indian bivalves
 
Creator V, Rajesh K
Mohamed, K S
Kripa, V
 
Description 87-92
The effect of varying algal cell concentration, salinity and body size on the filtration (FR) and ingestion rate (IR) of three species of cultivable Indian bivalves, (green mussel Perna viridis, the backwater oyster Crassostrea madrasensis and the shortneck clam Paphia malabarica) were investigated under laboratory conditions. Axenic cultures of the unicellular alga Isochrysis galbana were used in the test solutions. The filtration and ingestion capacities of the different species in the order of high to low was Crassostrea > Perna > Paphia. The differences in the FR and IR have been attributed to the epifaunal habitat of the first two species as compared to the infaunal habitat of the latter. Increasing algal cell concentrations resulted in escalating FR and IR until a threshold of 105 cells.ml-1 in the case of Crassostrea and Perna and 7.5x104 in the case of Paphia. However, at this concentration all the species showed production of pseudofaeces and therefore the critical cell concentration was one step lower to the threshold level. The FR and IR were significantly higher in larger bivalves and the peak was observed at the ambient natural salinities of the respective species tested.
 
Date 2009-06-15T12:17:10Z
2009-06-15T12:17:10Z
2001-06
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/4606
 
Language en_US
 
Publisher CSIR
 
Source IJMS Vol.30(2) [June 2001]