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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

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

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

M.G. Hussain
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: Clarias batrachus fry, Supplenental feeds, Catfish, Feed

Location: Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Cat fish, Feed

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 (1 05x45x14 em 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. The 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 em 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 was considered to be satiated when they stopped feeding or searching for food. After half an hour of feed supply the uneaten food particles and feces 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 intervals 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 feed tested were done according to AOAC (1980) and the results were shown. The data obtained from the experiment were analyzed in Randomized Block Design and ANOVA was performed. Duncan's New Multiple Range Test at a = 0.05 was also employed for further analysis of the results.

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

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The data on different growth parameters and survival rate of catfish fry fed on different supplemental diets is presented which shows that the supplemental diets tested had a significant influence on the growth and survival of C. batrachus fry. The highest gain both in length and in weight was given by the fish fed on live supplemental feed (T₁), whereas the lowest was recorded in case of T₄ (yeast 45%+ fish meal 45%). T₂ and T₃ gave a similar growth rate which was significantly lower than that of T₁ but significantly higher than T₄. Percentage of weight gain and specific growth rate followed the same trend like length and weight gain. There was no significant variation in the condition factor as obtained from the four treatments, T₁ and T₄ gave the same average condition factor. Average survival rates as obtained from different treatment groups ranged from 70.03 to 78.37% but there was no significant (P>O.OS) difference between the survival rates of different groups. Proximate analysis of the supplemental feeds showed highest protein and lipid content in diet of T₁ and the lowest in diet of T₃. Ash content was the highest in T₄ and the lowest in T₁. Nitrogen-free extract was the highest in T₃ and the lowest in T₁ where moisture content was the highest.

Knowledge Management: Journal