SUBSTITUTION OF ARTEMIA WITHBRACHIONUS IN DIFFERENT RATIOS DURING LARVAL REARING OF MACROBRACHIUM ROSENBERG/I AND EVALUATION OF THEIR FEED EFFICACY
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Authors
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APURBA KUMAR DAS
Central Institute of Fisheries Education
Seven Bunglows, Versova, Mumbai- 400 061.
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M. IFTEKHAR MOHIUDDIN
Central Institute of Fisheries Education
Seven Bunglows, Versova, Mumbai- 400 061.
Abstract
Larval growth during stage I-VIll were studied inMacrobrachium rosenbergii.
Duration in moult periodicity were recorded-during larval development period,
larvae were fed withBrachionus (grown on Baker's yeast and also Brachinous
raised through organic manuring in outdoor culture containers). The
performance of the feed was evaluated through substitution of brachionus in
the feeding protocol, in lieu of artemia 1st instar. The Artemia, Br~chionus
substition ratio of 75:25 was found to be most efficient.
The study also indicates that the comparative growth rate of Brachionus
plicatilis is higher in manure loaded tanks than with Baker's yeast. Growth
rate "Y'' in culture tank being 0.245 and 0.112 and corresponding duplicating
time (Td) too was found to be 2.855 and 6.365 respectively in tanks manured/
enriched with pig manure.
Keywords: Feeding efficacy, Substitution ratio,Artemia/Brachionus
