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Nursery rearing of pearl oyster Pinctada fucata (Gould, 1850) under onshore conditions

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Relation http://eprints.cmfri.org.in/7096/
 
Title Nursery rearing of pearl oyster Pinctada fucata (Gould, 1850) under onshore conditions
 
Creator Mathew, Ansy
 
Subject Theses
Pearl oyster
 
Description Successful rearing of spat of the pearl oyster, Pinciada fucaia (Gould, 1850) in
ideal conditions in optimum density and using appropriate feed is of utmost value for
high survival rate and growth of pearl oyster seed in commercial production.
Considering the importance of these aspects, the present study has been undertaken at
the Visakhapatnam Regional Centre of Central Marine Fisheries Research Institute to
understand the various nursery rearing of pearl oyster under onshore' conditions such as
stocking density, quality and quantity of microalgae condition, nutritional quality
indicated by biochemical composition. A significant aspect of the results in the present
study is the 100% survival rate observed even in higher densities. The concentration of
60 cells/!JI resulted in maximum growth of pearl oyster spat in single species diets,
except for Isochrysis galbana and Skeletonema costatum. The decreasing growth rates
observed in the present study with increase in algal concentration suggests that the
pearl oyster is not adapted for efficient feeding at higher food concentrations above 60
celis/pI. The two dietary species, Isochrysis ga/bana and Chaetoceros calcitrans showed
a better growth rate. The same also holds good for other combinations of three species
diets or a combination of all the five algal species, which showed remarkable growth.
The present study has shown that feeding and absorption in P. fucata are significantly
correlated with food availability. The relative food value of the algal species examined
were in the order I. galbana> C. calcitrans> S. costatum> N. salina> T. gracilis. The
protein levels of the five species of microalgae have been observed to vary over a
limited range of 23-29% dry weight. The lipid level of C. calcitrans, I. ga/bana, S.
costa tum, N. salina and T. gracilis are in decreasing order of 19%, 17%, 12%, 8% and
6% dry weight respectively. The carbohydrate level of C. ca/citrans, I. ga/bana, S.
costa tum, N. salina and T. gracilis in the present study are low 5%, 4%, 8%, 6% and 7%
dry weight respectively.
 
Date 2002
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7096/1/TH-106.pdf
Mathew, Ansy (2002) Nursery rearing of pearl oyster Pinctada fucata (Gould, 1850) under onshore conditions. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Central Marine Fisheries Research Institute, Cochin.