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Selection of Freshwater Pearl Mussel Species for Mantle Transplantation in Bangladesh

M.A. Hossain
Bangabondhu Sheikh Mujibur Rahman Agricultural University, Gazipur 1706. Bangladesh

M.A.Mazid
Bangladesh Fisheres research Institute. Mymensingh 2201, Bangladesh

M.G. Hussain
Bangladesh Fisheres research Institute. Mymensingh 2201, Bangladesh

K. Azimuddin
Bangladesh Fisheres research Institute. Mymensingh 2201, Bangladesh

N. Sultana
Bangladesh Fisheres research Institute. Mymensingh 2201, Bangladesh

Abstract/ Executive Summary:

Allograft mantle transplantations were studied in six species of freshwater mussels, Lamellidens marginalis, L. corrianus, L. jenkinsianus, L. phenchooganjensis. Parreysiacorrugata and P. favidens by transplanting foreign mantle tissue into the mantle tissue of a host mussel. After three months of rearing , maximum survivability and pearl formation were observed in L. marginalis and L. jenkinasianus followed bhy L. corrianus and L. phenchooganjensis. Very poor results were observed in case of Parreysia corrugate and P. favidens. In addition to the natral pearl producing capacidty of individual species, L. marginalis has been identified as the best species for mantle transplantation in Bangladesh

Keywords: Pearl, Mussel, Mantle transplantation

Location: Freshwater Station, BFRI

Start Date: 00-03-2001

End Date: 00-09-2001

Program Area: Resource Development and Management

Commodity: Aquatic animal

Objectives:

To select different species of freshwater pearl producing mussel for mantle transplantation in Bangladesh

Methodology:

Species selection- Six species of freshwater mussels have been selected. The species were Lamellidens marginlis, L. corrianus, L. jenkinsianus, L.phenchooranjensis, paresis corrugate and P. favidens. Only strong and gealthy mussels were selected for mantle tissue transplantation. Methods for mantle tissue operation - Operation includes two steps, mantle tissue slice making and translation. For slice making , mussels of healthy and strong conduction were selected. Mussel was opened and mantle tissue was then separated along pallial line from the mussel. Separated tissue strip was then transferred into glass board and cut into small spices of 2mm X 2mm size. For the mantle tissue taansplantation, mussesls of 1 year age , healthy and strong, with broad and distinct growth line and without disease lor injury were selected. A piece of mantle tissue was taken with needle in one hand and a wound was created in the mantle tissue of mussels along the horizontal direction with an hook in another hand . At this point tissue slice was transplanted following the direction from posterior side to center. In this process 8-10 slices were inserted in a single mussel. Managemint practice - Operated mussels were transferred to a rearing pond of 65 decimal within 3-4 hours of operation. Water depth of the pond was 1.5-2.0 meters. In a net bas 3 mussels were stocked and hanged from a rope stretched across the pond in the surface of water. The hanging depth was 30-35 cm. Mussels are primarily plankton feeder. therefore yellow green watercolor and about 30 cm transparency were maintained through proper fertilization to maintain the optimum plankton density in the pond. Sampling- Mussels were checked for survival and health condition fortnightly. Water quality parameters were recorded forthrightly. After 3 months of rearing , mussels were counted for survival . Each mussel was opened and number of pearl in each mussel was counted.

Source of Information: Bangladesh J. Fish., Res., 8(2): 113-116, 2004

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Six species of freshwater mussels, Lamellidens marginalis, L. corrianus, L. jenkinsianus, L. phenchooganjensis. Parreysiacorrugata and P. favidens by transplanting foreign mantle tissue into the mantle tissue of a host mussel. After three months of rearing , maximum survivability and pearl formation were observed in L. marginalis and L. jenkinasianus followed by L. corrianus and L. phenchooganjensis. Very poor results were observed in case of Parreysia corrugate and P. favidens

Knowledge Management: Journal