Growth of Freshwater Mussel Cristaria plicata Raising by Hanging in Pond at Different Water Depths สมศักดิ์ ระยัน โฆษิต ศรีภูธร ชลันธร วิชาศิลป์ รุ่งนภา เสนสาย และ บุญทิวา ชาติชำนิ

Abstract

Cristaria plicata is a large freshwater mussel and this possesses potential as a source of produce freshwater pearls. This study aims to the growth of C. plicata at different depths, and environmental factors in ponds, static water conditions, conducted between October 2017 and June 2018. The result was found that the C. plicata culture by hanging at a depth of 0.5 meters had an average weight gain and average length increases significantly different (P> 0.05) with a depth of 1.0 and 1.5 meters. With the average water quality factor throughout the experiment of the temperature 28.05 ± 1.79 °c, transparency 88.33 ± 4.54 cm, alkalinity 7.56 ± 0.27 mg/l, conductivity 58.83 ± 2.99 µs/cm, DO 8.53 ± 0.66 mg / l, Alkalinity 135.21 ± 33.35 mg / l, Hardness of 86.50 ± 5.96 mg / l and total ammonia 0.03 ± 0.01 mg / l. Biological factors, there were 52 species of phytoplankton, density 4.10x104 cells/ml. The study results show that C. plicata can grow in stagnant water conditions of the ponds according to the environmental factors mentioned above. This should have studied the mantle tissue transplantation to produce freshwater pearls, relavant environmental factors for growth, and breeding further use and conservation.