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Growth Performance of Larvae Produced from Vitamin E Treated Female Clarias Batrachus (linnaeus)

M. F. A. Mollah
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

A. Roy
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

M. S. A. Mamun
Department of Fisheries Biology and Genetics, Bangladesh Agricultural University Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

An experiment to observe the growth performance of the larvae produced from female Clarias batrachus treated with 4 dietary levels of vitamin E viz. 0 mg, 50 mg, 100 mg, and 200 mg /kg feed was conducted for 28 days. After rearing for 3 months females were used for induction of breeding to produce larvae. Same dose of pituitary gland (100 mg PG/kg body weight) was used for all treatments. From the 7^th day of hatching, the larvae were reared for another period of 28 days to see growth and survival rate of the larvae produced by the broods maintained under different dietary levels of vitamin E. In case of growth performance (percent length gain, percent weight gain, specific growth rate) and health condition larvae of T₂ (50 mg vitamin E/kg feed) showed significantly better result when compared with those of T₁ and T₃. There was no significant difference in the growth performance between the larvae of T₂ and T₄. Larvae of T₂ although showed higher survival rate but the difference between different treatments was insignificant. The results concluded that 50 mg vitamin E/kg feed is more suitable to increase growth and survival rate of the larvae.

Keywords: Vitamin E, Larvae, Growth performance, Survival rate

Location: Reliance Aqua Farms, Ukilbari, Bailor, Trishal, Mymensingh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Cat fish

Objectives:

To observe growth performance of the larvae produced from female C. batrachus treated with different dietary levels of vitamin E.

Methodology:

For this experiment about 150 female C. batrachus broods were collected from the Reliance Aqua Farms, Ukilbari, Bailor, Trishal, Mymensingh and conditioned in the cistern for 15 days. Then healthy, strong and equal sized fish were used for the experiment. Eight cisterns were divided into four groups containing 2 cisterns in each group. These four groups corresponded to four experimental treatments. Each cistern was stocked with 10 females. Then four feeds were prepared keeping all the ingredients same except vitamin E. Doses of vitamin E were 0 mg (served as control), 50 mg, 100 mg and 200 mg /kg feed. Fish were reared with these feeds for three months. Then these fish were used to produce larvae through induced breeding method. This experiment was conducted with 7 days- old larvae of C. batrachus for a period of 28 days. The experiment was conducted in 16 bowls located at the Wet laboratory. Each bowl was 21 cm deep having an internal diameter of 32 cm with an effective water holding capacity of 10L. Each bowl was provided with continuous flow of water from porous pipe and outlet facilities. Sixteen bowls were divided into 4 groups. Each group was considered as one treatment e.g. T₁, T₂, T₃, T₄ and each bowl was considered as one replication. Each of four bowls of each treatment (T₁, T₂, T₃, and T₄) was stocked with 100 larvae produced by using the females fed 0 mg, 50 mg, 100 mg, and 200 mg vitamin E/kg feed respectively. After completion of the experiment total number of larvae of each bowl was counted and the percent survival calculated. Weight (mg) of the larvae of each treatment was divided by the length (mm) of the larvae to ascertain the health condition of the larvae. Percent length gain, percent weight gain, specific growth rate, health condition, and survival rate of the larvae were all tested using one-way analysis of variance (ANOVA). Significant results (P<0.05) were further tested using Duncan’s Multiple Range Test (DMRT) to identify significant difference between means. This statistical analysis was performed with the aid of the computer software SPSS programme.

Source of Information: Progress. Agric. 20(1 & 2) : 107 – 116, 2009, ISSN 1017-8139

Article Link (Online Journal): http://www.banglajol.info/index.php/PA/article/view/16862/11838

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All possible care and precautions were taken in selecting the stocking density, feed type and feeding frequency during the present larvae rearing experiment and as such the result obtained can only be attributed to the effect of vitamin E fed to the broods. The results concluded that 50 mg vitamin E/kg feed is more suitable to increase growth and survival rate of the larvae.

Knowledge Management: Journal