Effect of Natural and artificial feeding on growth performance and survival of fry and fingerlings of Clarias batrachus (Linn.)
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Date
2008
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Publisher
CCSHAU
Abstract
Present studies, ten diets (1-10) for the fry and fingerling of
magur Clarias batrachus were prepared the with varying protein levels
(35, 38, 40, 42 and 45%) were formulated using fishmeal (diet 1-5)
and the processed soybean (diets 6-10), as the protein sources. Two
hundred fry and fingerlings were randomly released @ 15 per aquaria
and then fed for 45 days at 5 percent body weight, per day on the ten
experimental diets. Fry and fingerlings were maintained under
laboratory conditions (LD 12:12 at 25°C). Studies have revealed that,
when live feed is given to fry, then better growth was obtained in
comparison to the group fed on the supplementary feed (soybean
based) which shows that live feed is the better feed for fry. The
studies have further shown that optimum dietary protein levels,
which have resulted significantly (P<0.05) with high growth, in terms
of live weight and length gain, SGR (% d-¹), growth percent gain,
nutrient retention (PER and APD%) and accumulation of carcass
protein and fat were observed in the groups, fed on diets containing
4025% protein irrespective of the protein source. Activities at 40.25%
dietary protein also support high digestibility and nutrient retention.
Studies have further revealed that the growth, nutrient retention and
energy retention values were significantly ((P<0.05) high in the group
fed on diet containing 40.25% dietary protein from processed soybean
(plant based) in comparison with the group fed on diet containing
fishmeal (animal based), as the protein source. Postprandial excretory
patterns of ammonical nitrogen and orthophosphate production were
not affected by the dietary protein quality and quantities, however,
fingerlings fed on soybean containing diets excreted significantly
(P<0.05) low levels ammonical nitrogen and orthophosphate, in
comparison with the fingerlings fed on fishmeal based diets.
Therefore, it is evident that supplementary diets with 40.25% crude
protein is required for the optimum growth for the magur, Clarias
batrachus fingerlings and live feed is best for the fry of C.batrachus.
Description
Keywords
Bacteria, Productivity, Sampling, Biological phenomena, polysaccharides, diseases, proteins, extraction, Processed animal products, Wood