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Observations on fattening, growth and sex reversal of the greasy grouper Epinephelus tauvina (Forskal)

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Relation http://eprints.cmfri.org.in/2455/
 
Title Observations on fattening, growth and sex reversal of the greasy grouper Epinephelus tauvina (Forskal)
 
Creator Raju, A
Kandasamy, D
Rajendran, I
Jagadis, I
Ramamoorthy, N
 
Subject Fish physiology
Mariculture
Groupers
 
Description This paper deals with the experiments conducted on the
development of broodstock, rearing ojjlngerlings and sex conversion of
the greasy grouper, Epinephelus tauvina under controlled conditions.
Groupers coUectedfrom the wild and harvested from the culture ponds
were raised to broodstock in 10 x 5 X 2.3 m (net water capacity of 100
tons) R.C.C. tanks by feeding with freshly killed sardines, cod liver oil
and vitamin tablets. E^erimental rearing ofjmgerluigs was carried out
in 30 ton tank. In broodstock rearing, the growth rate variedfrom 10.1 mm/
106.8g to 13.1mm/178.3g Jor the wild and 16.6mm/116.8g to
21.1mm/271.5g for the pond harvested stock with a feed
conversion ratio of 4.6-7.7 and 3.2-3.5 respectively. Maximum growth
increments of 27.2mm/404g and 25.5nvn/305g have been realisedfor
the wild and pond harvested stock respectively. In general, pond
harvested groupers showed higher growth with less conversion ratio.
The fingerlings registered a growth rate of24mm/42g with a conversion
ratio of 10. Preliminary experiments on sex reversal using androgen
hornvone (Testoviron Depot containing Testosterone Enanthate) revealed the
possibility of converting female to male by the indication of regression
in ovary size and disappearance of oocytes.
 
Publisher The Marine Biological Association of India, Cochin
 
Contributor Menon, N G
Pillai, P P
 
Date 2001
 
Type Book Section
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/2455/1/Article_32.pdf
Raju, A and Kandasamy, D and Rajendran, I and Jagadis, I and Ramamoorthy, N (2001) Observations on fattening, growth and sex reversal of the greasy grouper Epinephelus tauvina (Forskal). In: Perspectives in Mariculture. The Marine Biological Association of India, Cochin, Cochin, pp. 357-380.