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Rate of growth in spat and yearlings of the Indian backwater oyster Ostrea madrasensis Preston

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Title Rate of growth in spat and yearlings
of the Indian backwater oyster
Ostrea madrasensis Preston
Not Available
 
Creator Rao,K Virabhadra
Nayar,K Nagappan
 
Subject growth
spat
yearlings
oyster
Ostrea madrasensis
 
Description Not Available
Apart from brief reports by Hornell (1910) and Paul (1942) there exists no
detailed account of the rate of growth in the Indian backwater oyster, Ostrea
madrasensis Preston, which is an important species of shell-fish of commercial
value in the country. Hornell's (1910) account is based on an examination
of a few lots of spat-collectors placed in Ennur backwaters, near Madras,
during the months of the north-east monsoon of the year 1908, to ascertain
the principal determining factors in oyster-spawning; his observations on
the rate of growth were only incidental. Paul's (1942) study of the growth
of this species, among other animals, deals with material from the Madras
harbour. Although this species occurs in fair numbers and breeds well under
the almost marine conditions of the harbour, it remains stunted and does not
grow to the maximum size usually reached in estuaries and backwaters
(vide Rao, 1951). Since it is well known that oysters of the same brood from
the same locality exhibit a wide range of growth (Orton, 1937; Havinga, 1928
and Korringa, 1953) the maximum growth-rate alone, as given by previous
workers for this species, will be of little significance. An attempt has been
made here to study the maximum and the mean rates of growth of the spat
and yearlings of the oysters in their natural environs, together with the
possible effects of the fluctuating environmental factors upon the rate of
growth.
Not Available
 
Date 2021-08-02T10:04:21Z
2021-08-02T10:04:21Z
1956
 
Type article
Article
 
Identifier Not Available
Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52226
 
Language English
 
Relation Not Available
Not Available
 
Publisher CMFRI/ICAR