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Effect of Isoproteinous Feed on Growth and Survival of Tilapia (oreochromis Niloticus) Fry

I. Siddika
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

M. Das
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

K. R. Sumi
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

A four week experiment was conducted to evaluate the effect of isoproteinous (35%) feed prepared named diet 1, 2, 3 and 4 respectively by substituting 0%, 50% , 75% and 100% fish meal with meat and bone meal in view of preparing a cost effective tilapia (Oreochromis niloticus) fry feed. The four experimental diets (diet 1 to 4) each were randomly assigned to twelve hapas with three replications. Tilapia fry (0.011g) were randomly stocked in 100 fry/9ft² hapa and fed five times a day up to their apparent satiation. The results of the study showed that the weight gain, specific growth rate (SGR), the apparent net protein utilization value and survival (%) of the fish were significantly (P<0.05) higher and better feed utilization with lower FCR value was observed in fish fed on the diet 4 where meat and bone meal was used as sole source of protein base. There was no significant difference between the carcass moisture and lipid of fish fed with different experimental diets. The results of the study indicated that diet 1 containing fish meal (45.15% Fish meal, 27.43% Rice bran and 27.43% Wheat flour) can be replaced by meat and bone meal containing diet 4 (54.06% Meat and bone meal, 22.97% Rice bran and 22.97% Wheat flour) with no adverse effects on growth and survival of O. niloticus. Before recommendation several trials will be necessary in different farms to be sure of the reproducibility of the result obtained in the present experiment. Cost- benefit analysis reveals that the meat and bone meal containing diet certainly provides cheaper feed.

Keywords: Tilapia fry, Isoproteinous feed, Growth and Survival

Location: Boilor under Trishal upazila in Mymensingh

Start Date: 20-09-2011

End Date: 17-10-2011

Program Area: Animal Health and Management

Commodity: Tilapia

Objectives:

A research work was undertaken to prepare isoproteinous low-cost fish feed for Tilapia fry (O. niloticus) production by replacing different quantity of fish meal and to recommend the maximum level of replacement of fish meal by meat and bone meal to prepare a cost effective diet.

Methodology:

The experiment was conducted in Agro 3, fish hatchery and culture farm situated at Boilor under Trishal upazila in Mymensingh for a period of 28 days to determine the effects of isoproteinous feeds on growth and survival of tilapia (O. niloticus) fry in synthetic hapa from 20th September to 17th October 2011. Four experimental diets viz diet 1, diet 2, diet 3 and diet 4 were prepared by replacing 0, 50, 75 and 100% fish meal with MBM. Proximate composition of the dietary ingredients and test diets were determined following the standard methods given by Association of Official Analytical Chemists (AOAC, 2000). Two days old fry of initial average length of 0.8 cm and weight of 0.011g were released in hapa at the same stocking density of 100 fry/9ft². The water depth of experimental hapa was maintained at 2.5 ft. The fry of all the treatments (diet 1, 2, 3 and 4) were fed five times a day up to apparent satiation level. At the beginning of the experiment randomly selected fish fry sample from the stock was sacrificed and used for proximate composition analysis. This was considered as initial carcass composition of fish fry. At the end of experiment a pooled fish sample from all three replicate of four diets were sacrificed and used for final carcass composition analysis. Sampling was carried out at an interval of 7 days where fry were caught by a scoop net and kept in a bowl with water. Total length and weight were recorded by using a scale and digital balance (AND GULF, Dubai, U.A.E., Model: GL-300). After recording the length and weight the fry were released in the respective hapa. The following parameters were used to evaluate the growth performance of fry. Length gain (cm) = Mean final length - Mean initial length Weight gain (g) = Mean final weight - Mean initial weight. An economic analysis was performed to estimate the cost (Tk/kg) of experimental diet. One way analysis of variance (ANOVA) was performed to test the significance of variation among the treatment means. Statistical tests were performed by computer based statistical software SPSS (Statistical Package for Social Science).

Source of Information: J. Bangladesh Agril. Univ. 10(1): 169–174, 2012, ISSN 1810-3030

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The result of the present study showed that the fry of O. niloticus can be successfully reared with diet 4 containing 54.06% Meat and bone meal, 22.97% Rice bran and 22.97% Wheat flour. Considering the growth performance, survival (%) and profit the best result was obtained with diet 4. The diet 4 was cheaper than control diet (45.15% Fish meal, 27.43% Rice bran and 27.43% Wheat flour). MBM could be used as a main protein source to replace fish meal without significant negative effect on growth and survival of O. niloticus fry. Thus the farmers can use a mixture of 54.06% Meat and bone meal, 22.97% Rice bran and 22.97% Wheat flour to reduce the cost of production. Further experiment with feed containing meat and bone meal instead of fish meal can be performed in different farms and also for a longer period of time to recommend the result in the farmers level.

Knowledge Management: Journal