Growth response of giant freshwater prawn macrobrachium rosenbergii (de man) juveniles to feeds based on combined animal protein sources
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Date
1998
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Department of Aquaculture, College of Fisheries, Panangad
Abstract
The present study aimed to evaluate the efficiency of test diets formulated from dif-
ferent animal protein sources viz., clam meat, shrimp meat and crab meat in various combi-
nations on the growth of giant freshwater prawn, Macrobrachium rosenbergii juveniles
was done for a period of 60 days. A comparison has also been made between the diets
based on combined protein sources over the diets with single protein sources.
Seven isonitrogenous test diets, Tl to T7 were prepared with 35% crude protein.
They were diet T 1 with clam meat + shrimp meat + crab meat, diet T 2 with shrimp meat +
crab meat, diet T 3 with clam meat + crab meat, diet T 4 with clam meat + shrimp meat, diet
T 5 with clam meat, diet T 6 with shrimp meat and diet T 7 with crab meat. The other ingredi-
ents used were GOC, tapioca powder, potato starch, cholesterol, sunflower oil and
supplevite- M (a vitamin-mineral mixture).
Results showed better growth rates in prawnjuveniles fed with diets based on com-
bined animal protein sources than those with single animal protein sources. Among the
combined protein sources the diet T3 recorded highest growth rate of 265.30 mg though it
was not seen to be significantly different from T 4 and Tl. Specific growth rate and protein
efficiency ratio also showed better performance of prawn juveniles fed on combined ani-
mal protein sources. The highest SGR (2.483) and PER (1.137) were recorded in prawns
fed on diet T3 and lowest SGR (1.839) and PER (0.747) were obtained with diet T5. The
survival rate of juvenile prawns was not found to be significantly influenced by the various
test diets used and the survival ranged from 86.67% to 96.67%.
Productive protein value (PPV) was found to be highest in prawn juveniles fed on
diet T3 (18.807) and the lowest with diet T5 (11.929). The PPV of prawns fed on diets T3
and T4 were found to be significantly higher than those fed on diets T2, T6, T7 and T5.
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Citation
171352