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Integrated Cage-cum-pond Culture System with Walking Catfish (clarias Batrachus) in Cages and Tilapia (oreochromis Niloticus) in Open Ponds

Phanindra Sangma
Program Officer, Caritas Bangladesh, 2 Outer Circular Road, Shanitbagh, Dhaka- 1217

Md. Abdul Wahab
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

Shahroz Mahean Haque
Department of Fisheries Management, Bangladesh Agricultural University, Mymensingh-2202

Sanjib Kumar Mondal
Senior Program Officer, Ecological Conservation Department, Caritas, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted for a period of 97 days at the Fisheries Field Laboratory Complex, Bangladesh Agricultural University, Mymensingh to determine the potential of the cage-cum-pond culture of walking catfish, as well as to assess the economic and environmental benefits of this system. The experiment had two treatments in triplicate. One treatment comprised walking catfish in cage and tilapia in open pond, and the other treatment comprised both walking catfish and tilapia stocked together in open ponds. Ponds of both treatments were stocked with walking catfish and tilapia at a stocking density of 10,000 and 20,000 ha^-1, respectively. Fishes in both treatments were fed with commercial pelleted feed (26% crude protein) twice daily at the rate of 10% body weight of walking catfish. All ponds were fertilized with urea and TSP at a rate of 50 kgha^-1 bi-weekly. Survival of catfish was very low in both treatments ranging from 8.33 to 21.33%. Specific growth rate of catfish was significantly higher (P<0.021) in treatment-2 than in treatment-1 with a value of 2.42 and 1.69 g fish^-1d^-1, respectively. The net yield for catfish of treatment-1 and 2 were 49.67 and 43.45 kgha-1, respectively and there was no significant difference between the treatments. The survival rate of tilapia was 65.17 and 71.17% with daily weight gain of 2.31 and 2.22g fish^-1 in treatment-1 and 2, respectively. Net yield were 817.00 and 790.63 kg ha-1, respectively and there were no significant difference in net yield of tilapia between treatments. Net profit obtained from integrated-cage-cum pond culture (Tk. 24,518 ha-197d^-1) was higher than that of open pond (Tk 22,685 ha^-197d^-1).

Keywords: Growth, Performance, Phosphorus, Clarias gariepinus

Location: The Fisheries Field Laboratory Complex, Bangladesh Agricultural University, Mymensingh, Bangladesh

Start Date: 24-07-2004

End Date: 28-10-2004

Program Area: Farming System

Commodity: Cat fish, Farming System

Objectives:

The objectives: a) to assess growth and production of fishes in both cages and ponds; b) to adopt the integrated cage-cum-pond culture system to the local conditions; and c) to assess the economic benefits of this integrated system.

Methodology:

The study was carried out for a period of 97 days from 24 July to 28 October 2004 in six earthen ponds at the Fisheries Field Laboratory Complex, Bangladesh Agricultural University, Mymensingh, Bangladesh. The experiment was designed with 2 treatments with triplicates. GIFT (genetically improved farmed tilapia) strain of Nile tilapia (Oreochromis niloticus) and walking catfish (Clarias batrachus) were used for the experiment. In treatment-1, ponds were provided with cages of 1 m3 pond^-1; the walking catfish were stocked in the cage and the GIFT fingerlings were stocked in open pond. In treatment–2, both species were stocked in open pond. The stocking density were same in both treatment i.e. tilapia 20,000 ha^-1 and catfish 10,000 ha^-1.

Research design The fingerlings of catfish were collected from “The Reliance Aquafarm Ltd.” and stocked in cages for the experiment. Fingerlings of walking catfish and GIFT were stocked according to the research design. Water quality parameters such as temperature (ºC), transparency (cm), pH, dissolved oxygen (mgl^-1), total alkalinity (mgl^-1), Phosphate-phosphorus (mgl^-1), nitrate nitrogen (mgl^-1), ammonia nitrogen (mgl^-1) and chlorophyll a (µgl^-1) were measured at the biweekly.

Growth and production performance To evaluate the growth performance following growth parameters has been determined.

a) Weight gained = Mean final fish weight – mean initial fish weight

b) Percentage of weight gained = (Mean final fish weight – mean initial fish weigh) / (Mean initial fish weight) x 100.

c) Specific growth rate: (Log_e W₂ – Log_e W₁) / (T2-T1) x 100. Where, W₁ = the initial wet body weight (g) at time T₁ (day); W₂ = the final wet body weight (g) at time of T₂ (day).

d) Survival rate = (No. of fishes harvested) / (No. of fish stocked) x 100.

e) Yield of fishes: i. Gross Yield = No. of fish caught x Average final weight. ii. Net Yield = No. of fish caught x Average weight gained

Source of Information: Res. Agric. Livest. Fish. Vol. 4, No. 3, December 2017: 221-227. ISSN : P-2409-0603, E-2409-9325

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Cage-cum-pond culture has been successfully practiced in most Asian countries and it may be the appropriate tool for additional fish production in Bangladesh. Cage dissemination, orientation and stocking density of fishes in cages should be perfectly followed to get better quality and quantity of fish. Thus, cagecum-pond farming can be a good option to increase targeted fish production and create employment opportunities by adding together economic profit for fish farmers of Bangladesh.

Knowledge Management: Journal