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Fine Tuning of Freshwater Pearl Culture Technology

Dr. Mohosena Begum Tanu
Senior Scientific Officer
Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh-2201

Arun Chandra Barman
Scientific Officer
Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh-2201

Md. Ariful Islam
Scientific Officer
Freshwater Station, Bangladesh Fisheries Research Institute, Mymensingh-2201

Abstract/ Executive Summary:

Experiment was carried out in earthen ponds at Freshwater Station with different culture techniques, such as keeping 2-3 mussels in hanging net, 10-15 mussels in box net at the pond bottom and releasing the mussels (80-100 nos./dec) in water for grazing. After 5 months, maximum growth was obtained from the grazed mussels showing 5-6 pearls having the sizes of 2-3 mm. It is worthwhile to mention here that in our previous study in 1999, it was taken 12-18 months to obtain same size of pearl.

Keywords: Fine tuning, Freshwater, Pearl culture technology

Location: Mymensingh

Start Date: July 2010

End Date: June 2014

Program Area: Knowledge Management

Commodity: Pearl

Objectives:

1. Optimization of pearl production in terms of quality and quantity against the number of mantle tissue slices to be inserted into the mussels;

2. Determination of suitable water level for maximum pearl production; Refinement of image pearl culture technology; dissemination of technology through on-farm trial and training

Methodology:

Different numbers of mantle tissue slices from the middle to posterior positions of juvenile mussels L. marginalis was transplanted to the posterior region of the mantle tissue of 100 adult mussel and later cultured in earthen ponds for a period of 2-3 years. Pond was fertilized regularly with organic and inorganic fertilizers. After culture period, optimum number of tissue slice was determined for maximum production of quality pearl in terms of shape, colour, etc. The operated mussel having same number of inserted mantle tissue slice was cultured for 2-3 years in different water level of the pond. Demand of image pearl depends on the shape of the image. The shape of the image might be faulty due to lack of proper nutrition for the mussel and culture period. Different attractive images was inserted into the mussel and later cultured for different period.

Source of Information: Annual Research Programme 2012-13, BFRI, Mymensingh.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Nine lakh

Total Budget (Tk.) : Nine lakh

Achievement/Findings:

Maximum 100 mg (average 50mg) weight of pearl was produced in 8 months culture period. Three shapes such as round, rice and irregular were obtained. Dissemination of technology is going on through farmer’s day, training & demo farm. Applying this technology quality pearl can be produced, image pearl culture technology will be refined and women empowerment could be ensured.

Knowledge Management: Report/Proceedings