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Comparative Study on the Effects of Low Cost Oil Seed Cakes and Fish Meal as Dietary Protein Sources for Labeo Rohita (hamilton) Fingerling

K. A. Latif
Department of Fisheries,

M. T. Alam
Institute of Biological Sciences, University of Rajshahi, Rajshahi;

M. A. Sayeed
Department of Biology and Genetics, Bangladesh Agricultural University, Mymensingh

M. Afzal Hussain
Department of Fisheries, University of Rajshahi, Rajshahi

S. Sultana
Department of Zoology, University of Rajshahi, Rajshahi

M. A. Hossain
Department of Fisheries, University of Rajshahi, Rajshahi

Abstract/ Executive Summary:

A trial was conducted to evaluate the effects of combination of soybean meal (SBN), mustard oilcake (MOC), sesame oilcake (SOC) and linseed oilcake (LOC) as alternative for dietary fish meal (FM) protein for Labeo rohita fingerling for a period of 56 days. Six experimental diets were formulated by replacing 30, 50, 60, 70 and 100% (2 diets) of the total dietary fish meal protein by the combination of FM, SBM, MOC, SOC, and LOC. The combinations of the protein sources were as diet 1 (FM 100%), diet 2 (FM:SBM:MOC::70:15:15), diet 3 (FM:SBM:SOC:LOC::50:20:20:10), diet 4 (FM:SBM:SOC:LOC::40:20:20:20), diet 5 (FM:SBM:SOC:LOC::25:30:15:30), diet 6 (SBM:MOC:SOC:LOC::25:25:25:25) and diet 7 (SBM:SOC:LOC::40:30:30). The performances of these six test diets were compared with the diet 1 (control). All diets were iso-nitrogenous containing about 30% protein. The growth trial was conducted in a flow through system under laboratory condition with three replications for each treatment. On the basis of the growth response, food conversion ratio (FCR), protein efficiency ratio (PER) diet 7 showed better performance followed by diet 1, diet 2, diet 5, diet 3, diet 4 and diet 6 respectively but those were not significantly different (P>0.05). The diet 6 produced the lowest performance. The apparent protein digestibility (APD) values for all the experimental diets were very nearer but significantly different (P<0.05) and the values ranged from 70.55 to 77.79%; diet 1 showed the highest APD (77.79%), while diet 5 showed the lowest APD (70.55%). The results indicated that there was no significant difference (P>0.05) in diets even from control one which were formulated to evaluate the effects of combination of low cost oil seed cakes as dietary protein source for Labeo rohita fingerling. Hence, it might be concluded that from the economic point of view, that all the low cost oil seed cakes which are locally available can be used in combination form as the alternative protein source for the feed of Labeo rohita

Keywords: Oil seed cakes, Labeo rohita, Fingerling, Protein source.

Location: Mymensingh

Start Date: 01-09-1999

End Date: 30-11-1999

Program Area: Animal Health and Management

Commodity: Carp fish

Objectives:

To formulate several test diets for L. rohita fingerling by combining soybean meal, mustard oil cake, sesame oil cake and linseed oil cake and their trial under laboratory condition.

Methodology:

The study was carried out in a flow through system in the Dept. of Aquaculture, Bangladesh Agricultural University, Mymensingh for a period of 56 days during the month of September to November, 1999. Twenty one plastic buckets (containing about 17 litre water) were used for the experiment. The water supply for the continuous flow through system was continued from a deep tube well and supported by a centrifugal pump, which was agitated before being collected in 6 steel header tank. The collected fingerlings were acclimated to the laboratory condition for a period of 7 days. During acclimation, adequate oxygen was supplied, temperature was maintained from 28⁰C to 30⁰C and fish were fed twice daily with compounded pelleted feed containing 30% protein. The fingerlings of rohu (mean weight 2.5 ±.04g) were randomly distributed at a rate of 12 fish per bucket. Water was allowed to drop down into each bucket with a rate of 250 ml per minute, which was increased up to 350 ml per minute with the increase of fish size. Each bucket was covered by nylon net to prevent jumping out of fish. Siphoning was done to remove uneaten feed and faeces twice daily. To prepare experimental diets different ingredients such as- fish meal (56% protein), defatted soybean cake, mustard oilcake, sesame oilcake and linseed oilcake seed, cod liver oil and soybean oil, minerals and vitamin premix, carboximethyl cellulose, chromic oxide, α-cellulose and wheat flour were collected. Prior to formulation of diets different ingredients (protein source) were subjected to proximate analysis. Seven isonitrogenous diets were formulated to contain 30% protein (Akand et al., 1991), 14-17% lipid, 6 to 10% crude fiber and 31- 35% digestible carbohydrate. Diets were formulated to be as iso-caloric as possible. During the formulation of diets essential fatty acid contents were taken into consideration by adjusting the level of cod liver oil and soybean oil For diet preparation all ingredients were ground finely and sieved. After sieving all the required amount of dry ingredients along with the vitamin, mineral premix and chromic oxide were weighed as per formula and mixed thoroughly

Source of Information: Univ. j. zool. Rajshahi Univ. Vol. 27, 2008 pp. 25-30 ISSN 1023-6104

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The requirements of carp and other fin fish for phosphorus, magnesium and zinc are well documented. Therefore, the presence of a certain level of phytic acid in the sesame oilcake diet may have been a factor responsible for the average growth response of L. rohita fry. Sesame oilcake also has the poor palatability which may reduce the fish’s food intake. Essential amino acid deficiency may have another negative impact on growth of rohu fry. However, during processing of pelleted feed, the E-amino group of the lysine molecule may react with non-protein molecules present in the feed to form additional compounds that render lysine biologically unavailable although chemically measurable. The present evaluation indicated that a combination of different plant protein sources used as alternative for fish meal were more acceptable to L. rohita fry than plant protein materials used individually. However, the acceptability of the diet was influenced strongly by the inclusion of the combination of different plant protein sources.

Knowledge Management: Journal