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Partial Replacement of Fishmeal Protein by Soybean Meal Protein in the Diet of Mrigal, Cirrhinus Cirrhosus (ham.) Fry

D.A. Jahan
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

L. Hussain
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M.A. Islam
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Abstract/ Executive Summary:

To find out a suitable balance diet for Cirrhinus cirrhosus fry substituting fish meal protein by full-fat soybean meal protein as dietary protein source for C. cirrhosus fry (1.29g) was studied in 12 aquaria for 60 days. The fishes were fed with four isonitrogenous (30% protein) and iso-caloric experimental diets viz. diet 1 (100% fish meal protein), diet 2 (75% fishmeal protein and 25% soybean meal protein), diet 3 (50% fishmeal protein and 50% soybean meal protein) and diet 4 (25% fish meal protein and 75% soybean meal protein). Among the diets the best growth, FCR and PER were obtained with diet 3 fed fishes and no significant difference (p<0.05) was observed between diet 1 and 2 and diet 4 offered the worst performance. Therefore, considering fish growth, FCR and PER, it can be suggested that fish meal protein might be replaced 50% by soybean meal protein in the diet of C. cirrhosus fry for better growth.

Keywords: Fish meal, Soybean meal, Mrigal,

Location: Department of Fisheries Biology and Genetics, Bangladesh Agricultural University.

Start Date: 00-08-2003

End Date: 00-09-2003

Program Area: Animal Health and Management

Commodity: Feed

Objectives:

To evaluate soybean meal protein as a partial replacement of fishmeal protein in the diet of Indian major carp, mrigal, ?Cirrhinus cirrhosus fry
To find out a suitable balance diet for C. cirrhosus fry.

Methodology:

The experiment was conducted in the of Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh, Bangladesh for 60 days in August and September, 2003. The experiment was conducted in 12 glass aquaria (each 44 cmx24 cmX24 cm), each containing 20-L of deep tube well water with continuous aeration. Experimental fry were collected from Bangladesh Fisheries Research Institute, Mymensingh and acclimatized to the laboratory conditions for 7 days prior to commencement of the experiment and fed with a mixture of rice bran and mustard oil cake (1:1). C. cirrhosus fry (1.29g) were randomly distributed at a rate of 10 fish per aqurium with 3 replications for each treatment. The experimental fishes were fed twice daily at 9:00 hours and 15:00 hours with formulated diets at a fixed feeding rate of 5% body weight per day during the entire experimental period. The ration for feeding was readjusted after weighing fish in treatments at every 10th day on. the basis of actual average weight of the fish. Uneaten feed was removed by siphoning 1h after each feeding. Water in each aquarium was partially replaced twice daily during the removal of uneaten food or faeces. At the termination of the experiment, all fishes were weighed individually and used for analysis of whole body composition. Roasted soybean flour was used as test ingredient. Soybean meal and fish meal were analyzed for proximate composition. Four iso-nitrogenous diets were used in the experiment containing 30 % protein, having 11% lipid where fish meal and soybean meal were the main sources of protein. In the diets, fishmeal protein was replaced by soybean meal protein at 0% (diet 1), 25% (diet 2), 50% (diet 3) and 75% (diet 4), without amino acid supplementation. Diet 1 was used as a control. All the diets were prepared in pelleted forms, using carboxymethyl cellulose (CMC) as a binder. All dry ingredients were ground finely and sieved. After sieving, all the required amount of dry ingredients along with the vitamin premix was weighed as per formula of the experimental diets. After well mixing of the major ingredients, soybean oil was gradually added to the dry feed. Enough water was. added to make stiff dough. The mixture was the passed through a hand-pelleting machine to obtain pellets and dried in an oven at 40°C for 24 hours. The pellets were then crushed and sieved to obtain the particle size of 500 micro meter. All the diets were packed separately in airtight plastic bags and stored in a deep freeze. The formulation of feed samples from each treatment were cited and analyzed for proximate composition. After termination of the experiment, livers from nine fish from each treatment were fixed in 10% neutral buffered formalin. Samples were stained with hematoxylin and eosin and Periodic Acid-Schiff (PAS) for histological examination. Feed ingredients, experimental diets and fish muscle compositions (initial and final) were analyzed for proximate composition (%). Water quality parameters were analyzed according to APHA. All data were subjected to one-way analysis of variance CANOVA) followed by Duncan's multiple range tests to test the difference between means.

Source of Information: Bangladesh J. Fish. Res., 11(2), 2007: 181-188

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Soybean meal might be a promising ingredient as a substitute of fishmeal in the diet of C. cirrhosus fry and SO% replacement of fishmeal might be done by soybean meal without amino acid supplementation for better growth.

Knowledge Management: Journal