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Production Performance of Stinging Catfish (heteropneustes Fossilis, Bloch) in Monoculture at Two Different Locations

MD. TAPON MAHMUD
Department of Fisheries Biology and Aquatic Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

M.A. SALAM
Corresponding author:
Department of Genetics and Fish Breeding Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

MD. SHAKHAWATE HOSSAIN
Department of Fisheries Biology and Aquatic Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

MD. JAHANGIR ALAM
Department of Fisheries Biology and Aquatic Environment, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706, Bangladesh

Abstract/ Executive Summary:

An on-farm monoculture experiment was conducted for a period of four months from May to September 2014 to compare the growth and production of stinging catfish, Heteropneustes fossilis, at two different environmental conditions. Two locations were one in Gazipur Sadar (AEZ 28)and the other in Narsingdi Sadar (AEZ 9).At each location, there were five ponds of almost similar size and water depth. The stocking density was 500 fry per decimal for each location. Pre-stocking and post-stocking management were similar in both locations. There were considerable variations in most of the water and soil qualities between two locations. After four months of rearing, a significantly higher (p<0.05) mean harvesting weight of H. fossilis (48.10±7.12 g) was observed in Narsingdi, as compared to that of Gazipur (23.18± 6.24 g).

Keywords: Heteropneustes fossilis, Monoculture, Dissolve Oxygen

Location: Sadar Upazila in Gazipur and Narsingdi district, Bangladesh

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Cat fish

Objectives:

To compare the growth and production performance of H. fossilis under monoculture in Gazipur and Narsingdi locations.

Methodology:

The experiment was conducted at two different locations of Sadar Upazila in Gazipur and Narsingdi district, which fall under the AEZ 28 and AEZ 9, respectively. There are large variations in different parameters within each zone. Description of the ponds: The average area of experimental ponds was 12 decimal with an average water depth of 1.5 m. All ponds possessed almost similar size, shape and bottom type. The ponds were free from aquatic vegetation and well exposed to sunlight. The main sources of water in ponds were rainfall but had facilities to supply water from a big reservoir using water pump whenever needed. Design of experiment: The experiment was designed to compare the aquaculture production potential of H. fossilis in two different AEZs (Agro-ecological Zone) of 28 (Gazipur) and 9 (Narsingdi). There were five ponds in each location. The stocking density of H. fossilis in each pond in each location was 500 fry per decimal. The duration of the experiment was four months from May to August 2014. Here the two experimental locations were considered as treatment and the numbers of ponds in each location were as replication. Pond preparation and stocking: Ponds were prepared by removing weeds and unwanted fish species with repeated netting. Afterwards, the ponds were treated with lime at the rate of 1.0 kg decimal-1. Thereafter, the ponds were left out for 7 days to allow the development of plankton community. The fish were stocked on 11 May, 2014 with fry of stinging catfish (H. fossilis)collected from fish hatchery, located in Mymensingh. Before stocking all fishes were kept in a hapa for conditioning, and length and weight of fry were recorded. The stocking rate of H. fossilis fry was 500/decimal respectively. The average weight and length was about 0.22 g and 3.06 cm, respectively during stocking. Feeding: Commercial fish feed was used for feeding the fish daily. Feeds were applied twice a day, half in the morning and the rest in the afternoon. Feeds were supplied at the rate of 20% for the first month, 15% for the second month, 10% for the third month and 5% for the fourth month. Feeding rates were adjusted according to the increase of fish body weight observed after fortnightly sampling. Analysis of water quality parameters: Various water quality parameters were recorded and estimated fortnightly. Water temperatures were recorded by a portable digital Celsius thermometer.Transparency of water of the experimental ponds were measured by a Sccchi-disc (30 cm in diameter) tied to a rope along with measuring tape. First, the Secchi-disk was immersed into the water then the visible and invisible lengths under the water to the naked eye were measured in cm.Dissolved oxygen (mg/l) of water was measured by a portable digital dissolved oxygen (DO) meter (Lutron, PDO-519) on the spot.pH of water samples was measured by a direct reading using digital pH meter (HANNA, HI 8428) on the spot. Total alkalinity of the water samples was determined by a titrimetric method using methyl orange indicator. It was calculated by the following formula:Total alkalinity (mg1-1) as CaC03 = A × 20 (when amount of sample is 50 ml), A = Total ml of titrant used. Ammonia-nitrogen was also determined by the HACH device (FF2, CAT. NO. 9262600) with Rochelle salt and Nessler reagent. Plankton analysis: For qualitative and quantitative study of phytoplankton and zooplankton, ten liters of water sample were randomly collected from five different locations of each of the ponds and passed through a plankton net (mesh size 55 μm) and finally concentrated to 100 ml. Then concentrated samples were preserved in small plastic bottles in 5% buffered formalin for further study.Counting of plankton was done with the help of Sedgwick-Rafter Counting Cell (S-R cell) following Rahman (1992). Identification of plankton (phytoplankton and zooplankton) up to generic level was made according to Belcher and Swale (1978). Soil analysis: Soil samples were collected monthly from the surface soil of the pond bottom with the help of an Ekman Dredge which was designed to trap normally a column of soil of 3-4 cm deep from the soil-water interface. Soil colour of both wet and dry soil samples were determined by eye estimation. Total nitrogen was determined by micro Kjeldahl Method (Bremner and Mulvancy 1982). Phosphorus was determined by Bray and Kurtz’ method (Olsen and Sommers 1982). Potassium was determined by Ammonium acetate extraction method (Barker and Surh, 1982). This was determined by Ammonium acetate extraction method (Barker and Surh 1982). Iron was determined by using the Atomic Absorption Spectrophotometer (AAS) according to their respective wave length (Ullah et al. 1993). Statistical analysis: The obtained data were analyzed statistically to observe the water quality parameters, plankton abundance and production performance of fishes in different treatments. ttests were followed to analyze the mean values of water quality parameters, plankton abundance and growth, survival and yield data,using SPSS (Statistical Packages for Social Science) and MSTAT-C software.

Source of Information: Bangladesh J. Fish. (2021) 33(1) : 31-37

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Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All parameters of water and soil remained within more productive range for H. fossilis culture in Narsingdi region but less productive range for H. fossilis culture in Gazipur region. The reasons might be due to variation in water and soil quality parameters between Gazipur and Narsingdi region.

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