Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Influence of Stocking Density on the Culture Potential of Freshwater Catfish Pangasius Pangasius in Pond

M.A. Razzaque
Department of Fisheries, Ministry of Fisheries & Livestock, Govt. of Bangladesh

M.A. Mazid
Bangladesh Fisheries Research Institute, Mymensingh 2201

M.N. Islam
Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh2202, Bangladesh

M. Kamal
Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh2202, Bangladesh

M.A. Hossain
Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh2202, Bangladesh

M.A. Mansur
Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh2202, Bangladesh

Abstract/ Executive Summary:

Influence of stocking density on the production of freshwater catfish Pangasius pangasius with formulated feed in ponds was studied. The fish fry were collected from the Meghna river near Chandpur which is a natural breeding ground of this fish. Three stocking densities chosen during this experiment were 5000, 8000 and 11000 fry/ha with an initial weight of 42.57 ±2.51 g. The formulated feed was prepared in the laboratory which contained 45% fish meal, 30% mustard oil cake, 15% wheat bran and 10% rice bran to supply 40.48% protein in feed. The growth of P. pangasius in terms of net weight gain was 409.49, 266.49 and 236.37 g at the 5000/ha, 8000/ha and 11000/ha stocking densities respectively, which was statistically significant (p<0.05). High food conversion ratio (FCR) was also observed during this research study which ranged between 7.06 to 7.72. A production of 2.6 tons/ha at the stocking density of 11000/ha; 2.13 tons/ha at the stocking density of 8000/ha and 2.04 tons/ha at the stocking density of 5000/ha was obtained, while the growth of individual fish at the end of experiment was in opposite order. The result of this experiment indicates that stocking density has significant influence on the culture potential of freshwater catfish P.pangasius.

Keywords: Pangasius pangasius, Stocking density, Bangladesh

Location: Riverine station, Bangladesh Fisheries Research Institute.

Start Date:

End Date:

Program Area: Resource Development and Management

Commodity: Pangus

Objectives:

To find out the influence of stocking density on the average production and size of P. pangasius in natural pond.

Methodology:

Study area and pond preparation: This experiment was conducted in six natural ponds of Riverine station of the Bangladesh Fisheries Research Institute at Chandpur. The area of each pond was 0.17 hectare and the depth of water was 1.30±0.22 meter. Each pond was rectangular in shape, with an inlet for water supply. The banks (pond side) of each pond was high enough to prevent the inflow or overflow of water during heavy rain or flood. Undesirable vegetation was removed manually and unwanted fish were removed by repeated netting. The ponds were mainly rain fed but underground water was supplied by deep tube-well during the dry season in winter. Collection and stocking of fish fry: The fish fry of the species Pangasius pangasius were collected in the month of August'88 from the Meghna river near Chandpur by the help of the fishermen, who caught these fish fry by box trap. The fish fry of almost same size and batch were transported to the experimental area keeping these fish fry in large circular tank made of corrugated iron filled with river water. Transportation was done as quickly as possible without undue delay to reduce mortality. On arrival to the experimental area only the healthy and naturally moving fish fry were released into the ponds which were previously been prepared for this experiment. Before releasing into the ponds the fish fry were graded for the desired ones by keeping them in an arena made of nylon cloth which was placed in the experimental ponds. Length and weight of each fry was recorded in centimeter and gram respectively before releasing into the experimental ponds. This is initial length and weight of fish fry of this experiment the average of which was 17.2±2.01cm and 42.57±0.51 g respectively. Design of experiment: In order to study the growth and production potential three treatments were given in the experiments each with two replications. Six experimental ponds were divided into three groups each group consisted of two ponds. A number of 850, 1360 and 1870 fish fry were released in duplicate into three sets of ponds maintaining a stocking density of 5000/ha, 8000/ha and 11000/ha respectively. The average length of the fish fry for this experiment was 17.20±2.01 em and the average weight was 42.57±2.51 g. This is initial length and weight of the fish fry used in this experiment. Fish feed preparation and feeding procedure: The fish feed was prepared by the locally available materials. Such materials were mustard oil cake (30%), rice bran (10%), fish meal (45%) and wheat bran (15%). The ingredients were weighed by a laboratory balance. The required quantity of mustard oil cake was soaked in water for 24 hours. This was done to remove toxic matters in the oil cake (if any). Required quantities of ingredients were mixed well manually with sufficient water in a plastic bowl. The feed was prepared just before feeding fish. After releasing into the experimental ponds the fish fry were allowed to acclimatize with the new captive environment for three days. During this time fish feed was not supplied to the ponds. Feeding began from the fourth day of releasing into ponds. The fish feed was supplied once a day in the morning between 9:00 to 10:00 a.m. at 5% (dry basis) of the body weight of fish in each pond. Feed requirement was re-adjusted once a month by measuring the growth of fish during this experiment. Feed was prepared in moist form and supplied in the form of small ball in metal trays of 3' x 3' size. The trays were fixed at the two corners of each pond tied up with poles. The trays were placed at 0.6 m below the water surface. The required quantity of feed for each pond was supplied in two trays so that the fish did not have to crowd around one tray. Fertilization of ponds: Pond fertilization was done by urea and triple super phosphate (TSP) three times during this experiment. The urea and TSP fertilization was done at a dose of 90 kg/ha and 150 kg/ha respectively. The first fertilization was done 10 days before the release of fish fry into the ponds. Fertilizers were applied by spreading into the ponds. Sampling procedure: Regular sampling was done to determine the growth of fish by catching fish from each pond by a seine net in every month. Sampling time was 9:00a.m. in the morning. The growth in length and in weight was measured with the help of scale graduated in centimeters and a balance respectively. The data was recorded to calculate the growth of fish. Limnological condition of pond water: Limnological condition particularly physico-chemical parameters of pond water was measured during this experiment. The following parameters were measured during this experiment: Temperature: Recorded by a centigrade thermometer at 9:00a.m. pH: Recorded by a fisher Accument digital pH/ion meter (Model No. 420). Dissolved Oxygen and Carbon dioxide: Determined according to the methods of APHA.

Source of Information: Bangladesh J. Fish. Res.,7(2), 2003: 123-130

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The stocking density has significant influence on the farming of scheilbeid catfish P. pangasius in natural pond.

Knowledge Management: Journal