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

Larval Rearing and Fry Raising of Pangasius Sutch I(fowler)

S. Mandal
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

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

M. A. Islam
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

M. J. A. Mirza
Graduate Training Institute, BAU, Mymensingh 2202

Abstract/ Executive Summary:

Pangasius sutchi were artificially bred for determining the hatching success and larval growth response to live food in relation to varying stocking densities. The fertilized eggs were hatched out with successful hatching rates ranging between 60 and 63%. Newly hatched larvae of 4.4 mm average length were reared using Tubifex as live food in metallic trays with water temperature of 27 to 29.5°C and dissolved oxygen level of 3.88 to 6.22 mg/l for 6-day with an average survival rate of 75.56±13.25%. The P. sutchi fry of 9- day old were further reared using Tubifex in the polythene covered metallic trays at the stocking densities of 2-7 fry per litre of water for a period of 14 day. P. sutchi fry raising at 4 individual per litre of water for 14 day gives better results in terms of survival and growth.

Keywords: Fry rearing, Tubifex, Pangas

Location: Aquaculture Laboratory, Bangladesh Agricultural University

Start Date: 00-07-1998

End Date: 00-08-1998

Program Area: Animal Health and Management

Commodity: Pangus

Objectives:

To determine the hatching success and larval growth response to live food in relation to varying stocking densities.

Methodology:

The experiment was carried out at the Aquaculture Laboratory of Bangladesh Agricultural University between July to August'98. The growth and survival of P. sutchi larvae were assessed under different stocking densities using Tubifex as a live food. The fertilized eggs were collected from the hatchery of Bangladesh Fisheries Research Institute, Mymensingh. The eggs were then transferred in the 6 polythene-covered metallic trays having a size of 0.027 m³. Prior to shifting of the eggs, all the trays were filled with 10 litre of water and then one hundred eggs were placed in each tray for hatching. Eggs were evenly distributed in the trays. The trays were treated with a 0.5ppm solution of KMn0₄ to protect the eggs from fungal infection. All the trays were provided with aeration facilities. About 50% of the water of all trays were changed after every six-hour during the period of incubation. All dead eggs and waste products were immediately removed by siphoning. Hatching and survival rates were properly recorded. About 55 to 56-hour old larvae were supplied with minced Tubikx for 6-day. Physicochemical parameters of tray water such as, dissolved oxygen and pH were recorded daily during this period through digital oxygen and pH meter, respectively. The water temperature was also recorded through the ordinary mercury Centigrade thermometer daily. There were 6 treatments based on densities, each of which having 3 replicates. Nine day old fry of P. sutchi were stocked at the densities of 2, 3, 4, 5, 6 and 7 individual per litre of water in the metallic trays having a volume of 0.027 m³ in treatment 1, 2, 3, 4, 5, and 6, respectively. The fry had an initial average total length of 10.4 mm and weight of 4.4 mg. In each tray 10 litres of water was used. During the experimental period, the fry was fed up to the satiation level for 4 times daily. The minced Tubi.tex were spread homogeneously on the water surface of the trays. The fry was considered satiated when it stopped searching for food within about 5-minute of food supply. The trays were cleaned twice a day through siphoning before feeding. A portion of water in the tray was changed twice at the time of siphoning daily.

Source of Information: Bangladesh J. Fish. Res., 6(2), 2002: 183-186

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

P. sutchi fry raising at 4 individual per litre of water for 14 day gives better results in terms of survival and growth.

Knowledge Management: Journal