The lsraeli Joumal of Aquaculture - Bamidgeh 49(4), 1997, 183-192
EFFECTS OF FEEDING UNCONVENTIONAL ANIMAL PROTEIN
SOURCES ON THE NITROGEN METABOLISM
IN ROHU LABEO ROHITA (HAMILTON)
B.N. Paul, S. Nandi, S. Sarkar and P.K. Mukhopadhyay
Central Institute of Freshwater Aquaculture Kausalyaganga, Bhubaneswar 751002 India
(Received 16.11.96, Accepted 10.11.97)
A bioassay trial of 8 weeks was conducted in the laboratory to study the effect of incorporation of certain unconventional animal protein sources (meat-cum-bone meal, hydrolyzed feather meat, fleshings meal and blood meal) in the diet of Labeo rohita fingerlings (avg w1 8.2 ± 0.11 g). Five isonitrogenous and isocaloric diets were prepared using fish meal (Group I, control), blood meal (Group II), feather meal (Group III), feshing meal (Group IV) and meal-cum-bone meal (Group V) as principal protein sources. The activities of alanine amino-transferase and aspartate amino-transferase in liver, kidney, gills and muscle were relatively less in groups l and V than others, indicating that the non-essential amino acid metabolism was less in this group. Glutamate dehydrogenase activity in liver (hepatopancreas) was found to be highest in the control group followed by group V, which suggested that the tissue was quite active in nitrogen metabolism in these groups compared to others and that, among the various unconventional animal protein sources tested, protein rating of meat-cum-bone meal was next to fish meal and an acceptable alternative for fish meal in the diet of this carp species.