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Growth Performance Evaluation of Genetically Improved Silver Barb (barbonymus Gonionotus Bleeker) in Different Agro-ecological Zones in Bangladesh

A.H.M. Kohinoor
Bangladesh Fisheries Research Institute Mymensingh 2201, Bangladesh

M.S. Islam
Bangladesh Fisheries Research Institute Mymensingh 2201, Bangladesh

M. Begum
Bangladesh Fisheries Research Institute Mymensingh 2201, Bangladesh

M.G. Hussain
Bangladesh Fisheries Research Institute Mymensingh 2201, Bangladesh

Abstract/ Executive Summary:

On farm trials of silver barb with other carps were carried out in 40 ponds during May to October 2005 in four agro-ecological zones viz., Trishal, Muktagacha, Parbotipur and Paikgacha in Bangladesh. In Trishal and Muktagacha zones, ponds were stocked with silver barb, silver carp and common carp at the stocking density of 11,500 fish/ha, whereas in Parbotipur and Paikgacha zones, ponds were stocked with silver barb, rohu, catla and mrigal at the stocking density of 10,000/ha. Among the ponds, 50% (20 ponds) were stocked with BFRI improved stock of silver barb (Treatment-I) and rest of the 20 ponds stocked with local silver barb stock (Treatment-2). The harvest weight of BFRI improved silver barb were 149±16.01, 168±18.06, 198±14 and 230±9.25g in Trishal, Muktagacha, Paikgacha and Parbotipur, whereas the data obtained at 113±15.52, 136±20.66, 170±17.0 and 205±12.l0 g for local stock of silver barb, respectively. In all trials, the harvest weight of BFRI improved stock showed significantly higher growth performance (P<0.05) over the local stocks.

Keywords: Genetically improved silver barb, Agro-ecological zones

Location: Mymensingh, Khulna and Dinajpur districts

Start Date: 15-05-2005

End Date: 15-10-2005

Program Area: Variety and Species

Commodity: Aquatic animal

Objectives:

To study the performance of the improved silver barb under different farming conditions in Bangladesh.

Methodology:

Origin of improved silver barb and local silver barb: The improved fingerlings used in this experiment were developed from 7th generation of silver barb descended from mass selection experiment. The local silver barbs were produced in local hatchery in different locations of the country. Study area: On farm trials of silver barb with other carps were carried out from 15 May to 15 October 2005 in four different agro-ecological zones at Trisha! and Muktagacha in Mymensingh zone, Paikgacha in Khulna zone and Parbatipur in Dinajpur zone of Bangladesh. Each zone had 10 ponds with a range of area of 600 -1000 m² and a depth of 1.0-l.5m. Experimental design and fish stocking: In Trishal and Muktagacha of Mymensingh zone, there were two treatments with five replications. Both the treatments were designed with silver barb (B. gonionotus), silver carp (H. molotrix) and common carp (C. carpio) at the stocking density of 7,500, 2,000 and 2,000/ha. In treatment-I, ponds were stocked with BFRI improved silver barb stock and in treatment-2 with locally available existing stock of silver barb. For the ponds in Paikgacha and Parbatipur, there were also two treatments with five replications. Both the treatments were designed with silver barb (B. gonionolus), rohu (L. rohita), catla (C. catla) and mrigal (C. mrigala) at the respective stocking density of 2500, 2500, 2500 and 2500 fish/ha. BFRI Improved stock of silver barb and locally available existing stock was stocked in treatment-I and treatment-2, respectively. Fish rearing and, pond management: Stocked fingerlings were fed with commonly available agricultural by-products, rice bran (70%) and mustard oil cake (30%) at the rate of 3-4% of standing biomass of fish regularly. All the ponds were fertilized with organic fertilizer (cow dung) at the rate of 2,000 kg/ha/month. Harvesting of fish and data analysis: After five months of rearing, all fish were harvested through seine netting and pond drying. During harvesting, fishes were counted and weighed from each pond to assess the survival rate and production. The growth and production data were analysed using a one-way analysis of variance (ANOVA). Results were tested to identify significant differences (P<0.05) between the means.

Source of Information: Bangladesh J. Fish. Res., 12 (2), 2008: 129-134

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Silver barb of BFRI improved stock had a higher growth and production over the existing local silver barb stock in all the treatments. Local existing stock of silver barb showed less weight gain. The BFRI improved stock, on the other hand, showed higher growth performance due to its greater genetic gain, which developed over several generations of selection.

Knowledge Management: Journal