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Effects of Some Selective Supplemental Feeds on the Survival and Growth of Catfish (clarias Batrachus Lin.) Fry

M.A. Rahman
Freshwater Station, BFRI, Mymensingh -2201, Bangladesh

M.G. Hussain
Freshwater Station, BFRI, Mymensingh -2201, Bangladesh

N. Begum
Freshwater Station, BFRI, Mymensingh -2201, Bangladesh

A. Bhadra
Freshwater Station, BFRI, Mymensingh -2201, Bangladesh

Abstract/ Executive Summary:

Feeding experiments were conducted for 21 days to study the effect of live food (Tubifex sp.) and three prepared supplemental feeds on the growth and survival of 13-day old magur (C. batrachus) fry. It was observed that the growth of fry varied significantly (p< 0.05) with different diets. The best growth was shown by the fry fed with Tubifex sp. followed by those fed with the diet containing yeast (30%), milk powder (30%) and chicken eggs (30%). The poorest growth rate was given by the fry fed on yeast (45%) and fish meal (45%). There was no significant difference in survival rates and condition factors among the fry fed with live food and prepared feeds.

Keywords: C. batrachus fry, Supplenental feeds, Survival

Location: Freshwater Station, Bangladesh Fisheries Research Institute

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Cat fish

Objectives:

To study the efficacy of few selective feeds for the rearing of C. batrachus fry.

Methodology:

The study was conducted in 12 steel trays of equal size (105x45x14 cm deep) for a period of 21 days at Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh. Each of the tray was filled with 20 liters of tap water and continuous water flow was maintained. There was a provision to pass out the excess water through an outlet of trays after maintaining the mentioned volume of water. Water flow rate was 0.2 1/min. The trays were stocked with 13-day old C. batrachus fry having an average initial length of 2.12 ± 0.12 cm and weight of 0.079 ± 0.016 g. Sixty fry were stocked in each tray. Four supplemental feeds were tested and they were designated as four treatments each with three replications. Treatment I (T₁) was live food (Tubifex sp), treatment II (T₂) was prepared with 30% egg + 30% milk powder+ 30% yeast, treatment Ill (T₃) with 45% milk powder + 45% yeast and treatment IV (T₄) with 45% yeast+ 45% fish meal. In all the prepared diets 8% wheat flour+ 1% vitamin premix and 1% fish oil were used as common ingredients. Feeding was done three times daily (at 8:00, 16:00, 22:00 hours) upto satiation. The fry were considered to be satiated when they stopped feeding or searching for food. After half an hour of feed supply the uneaten food particles and faeces were removed by siphoning. The dead fishes were removed as soon as they were detected. Twenty percent of the stocked fish in each tray were sampled at weekly interval and length, weight and survival rate were recorded. The mean gain both in weight and in length and survival rate as obtained from different treatments were recorded. Proximate analyses of the supplemental feeds tested were done. The data obtained from the experiment were analyzed in Randomized Block Design and ANOVA were performed. Duncan's New Multiple Range Test at a = 0.05 were also employed for further analysis of the results.

Source of Information: Bangladesh J. Fish. Res., 1 (2) : 55-58, 1997

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Growth performance of the fry fed on prepared diets were not good in comparison to the live food. The poor growth attained by the fry fed on prepared diets may be due to the inadequate acceptability of the feed to the fry. Low digestibility of feed might also caused such type of inferior growth.

Knowledge Management: Journal