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Culture Potentials of Climbing Perch, Thai Koi, Anabas Testudineus (bloch) Under Different Stocking Densities in Northern Regions of Bangladesh

Shafiqur Rahman
Bangladesh Fisheries Research Institute, Freshwater Sub-station, Saidpur, Nilphamary-5310, Bangladesh

Md. Shirajum Monir
Bangladesh Fisheries Research Institute, Head Quarter, Mymensingh-2001, Bangladesh.

Masud H Khan
Bangladesh Fisheries Research Institute, Head Quarter, Mymensingh-2001, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted in nine experimental ponds (each size 0.006 ha) to assess growth and production potentials of Climbing perch, Thai koi (Anabas testudineus) for the period of five months from July 23 to December 21, 2011. Three stocking densities were tested with three replications for each, viz., 50,000/ha as Treatment-1, 75,000/ha as Treatment-2 and 1, 00,000/ha as Treatment-3. Fish in all the experimental ponds were supplemented with commercial floating pellet feed (35% crude protein). The physicochemical parameters and plankton populations of pond water were within the suitable range for fish culture. The final weight and survival of Thai koi in Treatment-1 were significantly higher (P<0.05) than those in Treatment-2 and Treatment-3. The food conversion rate was significantly lowest in Treatment-1followed by Treatment-2 and the highest in Treatment-3. The product obtained from treatments Treatment-1, Treatment-2, and Treatment-3 were 4800.40, 5279.61and 5582.23 kg/ha, respectively but showed no significant (P>0.05) difference from each other. However, the highest net benefit was derived in Treatment-1 (BDT 4,43,458/ha), where the stocking density was 50,000/ha. The study reveals that less number stocking density gives higher growth, survival, final production, and net benefit.

Keywords: Anabas testudineus, Physico-chemical parameters, Stocking densities, Production potentials, Net benefit

Location: Bangladesh Fisheries Research Institute, Saidpur, Nilphamari

Start Date:

End Date:

Program Area: Socio-economic and Policy

Commodity: Koi/Climbing

Objectives:

The present study attempted to evaluate production potentials of Thai koi at on-station of Bangladesh Fisheries Research Institute (BFRI) Sub-station Saidpur, Nilphamari management in northern Bangladesh under different stocking densities.

Methodology:

2.1 Description of the study area and duration: The experiment was undertaken in Freshwater Sub-station, Bangladesh Fisheries Research Institute, Saidpur, Nilphamari located at 25°46′41′′N, 88°53′51′′E of Bangladesh for a culture period of five months from July 23 to December 21, 2011. Nine ponds were taken for three treatments each with three replicates. The average area of the ponds was 0.006 ha with a depth of 1-1.35 m. 2.2 Pond preparation: The ponds were prepared by drying, liming the bottom soil (@ 250kg/ha of CaO) and enclosed by a fine nylon mosquito net. Then after five days, ponds were filled up with underground water and fertilized with an organic fertilizer at the rate of 2,000 kg/ha to enhance the growth of plankton population especially zooplankton in the water bodies and waited for a week to allow the water to become suitable for stocking.2.3 Stocking of fish after two weeks of fertilization, fingerlings of Thai koi (A. testudineus) were stocked at the rate of 50,000, 75,000 and 1,00,000/ha under treatment-1 (T1), treatment-2 (T2), and treatment-3 (T3) on 23 July 2011. Before stocking the initial mean weights of the fingerlings were measured using a sensitive balance (OHAUS Model CS-2000). 2.4 Feed supply: After stocking, in all the treatments, a 35% protein-containing floating pellet feed was applied at the rate of 14-4% of estimated fish biomass twice daily at 9.30 in the morning and at 17.30 in the evening. The fingerlings were fed @ 14% of their body weight for the first three weeks and it was reduced to 4% from the subsequent weeks. During the culture trial, every month all the ponds were limed at the rate of 125 kg/ha to maintain pH and water qualities. 2.5 Growth measurement: The growth of fishes of all ponds was monitored fortnightly by using a random sampling method. At least 50 fishes were sampled with the help of a cast net to measure the growth to assess the health status and for feed adjustment. 2.6 Water quality parameters: The pond environment parameters such as surface water temperature, water depth, transparency, dissolved oxygen and pH was measured weekly using a Celsius thermometer, a graduated pole, a Secchi-disk a portable dissolved oxygen meter (HI 9142, Hanna Instruments, Portugal) and a portable pH meter (HI 8424, Hanna Instruments, Portugal). Total alkalinity was determined following the titrimetric method according to the standard procedure and methods (Clesceri et al., 1992). 2.7Plankton populationReplicate plankton samples, each of 10 L, were collected from different locations and depths from each pond by means of a bucket and filtered through a bolting silk plankton net of 55μ. The filtrate was transferred to another bottle and preserved immediately in 5% buffered formalin. Planktons were expressed as cells per liter of water of each pond. The quantitative analysis of phytoplankton and zooplankton was done according to Stirling (1985). 2.8 Harvesting of fish: After five months of rearing, the fish were harvested by dewatering the ponds. During harvest, they were counted and individually weighted to assess survival, growth, and production. The specific growth rate was estimated as: SGR (%bw/d) = [In (final weight)-In (initial weight]/culture period (days) x 100.2.9 Data analysis Comparison of treatment mean was carried out using one-way analysis of variance (ANOVA), followed by testing of pair-wise differences using Duncan’s Multiple Range Test (Vann, 1972). Significance was assigned at the 5% level (P>0.05). All statistical analysis was done by using the SPSS (Statistical Package for Social Science) version-17.5.

Source of Information: Journal of Experimental Biology and Agricultural Sciences, July -2013; Volume –1(3)

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Climbing Perch, Koi(A. testudineus) is an attractive and popular species to the people of Bangladesh due to its delicious and nutritious food value. But due to different natural and man-made hazards, the production of native koi is in endangered condition. In 2002 the introduction of Thai Koi in Bangladesh has created new hope for the people of Bangladesh especially the people of the northern region of Bangladesh. They are very interested in the culture of Thai koi. But so far there is no established cultural technique of Thai koi in Bangladesh especially in the northern region of Bangladesh. There are many factors that affect the production of Thai koi. Stocking density is one of the most important factors for the production of Thai koi. So the present study was very important to know the proper stocking densities of the Thai koi to get the optimum production.

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