EARLY AND BETTER MATURITY IN CARP BROOD STOCK WITH CONROL OF ENVIRONMENT AND FEEDING
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Authors
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A. GHOSH
Inland Fisheries Training Centre of Central Institute of Fisheries Education,
Barrackpore-743 101, West Bengal.
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P. K. ROY
Inland Fisheries Training Centre of Central Institute of Fisheries Education,
Barrackpore-743 101, West Bengal.
Abstract
Availability of carp breeders in their prim state of maturity is a major constraint in
hypophysation. Experiments conducted in a fish farm at Naihati, West Bengal, for two
consecutive years, 1983-84 and 1984-85, clearly prove that by manipulation of environmental
parameters s~ch as metabolites, dissolved oxygen, running water conditions, as also of stock
densities and quality and quantity of feed, Cat/a cat/a, Hypophythalmichthys molitri'C, Labeo
rohita, Cirrhina mrigala and Ctenopharyngodon it/ella can be made to attain better maturity
and SJ)awning stage much earlier than norntal i.e. even in summer months and the entire
stock spawned during the period from March to September. Percentage of successful breeding,
quantities of eggs realeased and fertilised in •·elation to the body ·weight of all the species,
were also found to be more in comparison to the brood stock raised through the conventional
methods.
