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Use of Waste Energy by Adding Shing (heteropneustes Fossilis, Bloch 1797) Into Pangus (pangasianodon Hypophthalmus, SAUvage, 1878) Pond

A. Ali
Bangladesh Fisheries Research Institute

T. Akter
Department of Fisheries Management, Bangabandhu Sheikh Mujibur Rahman Agricultural University,Gazipur, Bangladesh,

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

Abstract/ Executive Summary:

An experiment was conducted to evaluate the growth, survival and production performances of pangus (Pangasianodon hypophthalmus) and shing (Heteropneustes fossilis) in which shing was used as guest to utilize the waste energy in pangus pond. The experiment was run for four months from July to October, 2008. Fishes were reared in pond no I, II, III with stocking density 150, 250 and 300 per decimal of pangus respectively. Shing was stocked only 10/decimal in pond-I. A complete artificial feed was used containing 23% protein. The weight gain (385.17±2.15g) of pangus was significantly higher in pond-I than that of pond-II (325.15±2.70g) and pond-III (319.30±2.90g). However, the production of pangus per ha were (28158.00±0.10kg) in pond-I, (34159.112±0.50 kg) in pond-II and (37856.208±0.60 kg) in pond-III. Total production of shing in pond-I was 240.57±1.60 kg/ha/yr. The survival rates (%) of pangus under three stocking densities were 98.66%, 85.06% and 80.00% respectively. The food conversion ratio (FCR) of pangasius pond I, II and III were 1.53, 1.81 and 1.84 respectively. The lowest FCR of 1.53 was found in pond-I. The net return of the pond I, II and III were BDT 273503.10, 117456.73 and 107906.60 per ha per year. The addition of shing into pangasius pond as guest invites economic benefit to the pangus culture.

Keywords: Growth, Production, Stocking density, Survival rate, Tilapia

Location: Baragram under Upazilla Muktagaccha, Mymensingh

Start Date: 00-07-2008

End Date: 00-10-2008

Program Area: Animal Health and Management

Commodity: Pangus

Objectives:

1. To evaluate the growth and production of pangus, 2. To evaluate the growth and production of shing by using waste energy in pangus ponds, and 3. To evaluate the profitability of the culture system.

Methodology:

The experiment was carried out for a period of four months from July to October, 2008 to evaluate the effect of added shing into pangus ponds for the utilization of waste energy. The study site is situated at Baragram under Upazilla Muktagaccha, Mymensingh. The experiment was conducted in three ponds having area of 10 to15 decimal. The feed was supplied 10% of fish body weight at the beginning of the experiment. Then it was adjusted to 8% after 2nd sampling date and gradually it was readjusted to 7% and 6% of their body weight, after the 4th and 6th sampling date respectively. Half of the ration was supplied at 9.00 am and remaining half was supplied at 4.00 pm. The feeding was done direct broadcasting without any feeding trays. The water quality parameters such as temperature, dissolved oxygen and pH were recorded on each sampling dates, in the morning at 9.00 am to 10.00 am. The temperature and dissolved oxygen of the water was determined by DO meter (YSI Model-58, USA) and pH and recorded by pH meter (Model-445, UK). The experimental pangus fry belonging to the same age group having average weight 31g was brought from the Sharnalata Agrofarm, Radahkanai, Fulbaria, Mymensingh. Shing fry also collected from the same area almost similar size and age group. The experiment was conducted in three ponds at Baragram, Muktagaccha, Mymensingh. As the availability of the pond to be cultured in farmer’s pond was limited, therefore the study was conducted without replication. The fry of pangus were released at three stocking densities of 150, 250 and 300 individuals/decimal which were designated as pond-I, pond-II and pond-III respectively. In pond-I, shing was stocked at the stocking density of 10/decimal. Fry were acclimatized with experimental pond water in plastic bag and then stocked at 10 am. In the past the scientific name of thai pangas was P. sutchi, P. hypophthalmus. Now the scientific name of thai pangas Pangasianodon hypophthalmus. The artificial feed (Aftab Bohumukhi Farm Ltd.) was collected from local market. Sampling was done by catching of ten fish from each pond with the help of a dharmajal at 15 days interval. The total weight of fishes was recorded by using ordinary balance. The fish were released in the respective ponds after recording the weight. Every 15 days interval, growth (g) was measured. To evaluate the fish growth the following parameters were used: weight gain (g), percent weight gain SGR (%), survival rate (%), production (kg/decimal/120 days), total production (kg/ha/yr). In the experiment weight gain was calculated as: Weight gain (g) = Mean final weight – Mean initial weight. The specific growth rate in the instantaneous change in weight of fish calculated as the percentage increase in body weight per day over given time internal. The food conversion ratio of pangus expressed by the rate of food consumed to weight gain was determined for each of the three stocking rates. At the end of the experiment most of the fishes were caught by net and the rest by drying the ponds. The production was calculated as Production = No. harvest x Final average weight.

Source of Information: J. Environ. Sci. & Natural Resources, 6(1): 209 - 216, 2013; ISSN 1999-7361

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

It was found that the total production was increased with increasing stocking density. But the individual fish growth was decreased with increasing stocking density.

Knowledge Management: Journal