전자저널 > 전자저널 > Influence of Water Temperature and Salinity on Sand Ejection of Manila Clam, Ruditapes philippinarum

Influence of Water Temperature and Salinity on Sand Ejection of Manila Clam, Ruditapes philippinarum

Kyoung Ho Kang, Jae-Min Kim and Young Hun Kim

Division of Aqua Life Science, Yosu National University, Yosu, Korea

In this study, the influence of water temperature and salinity on sand ejection of Manila clams, Ruditapes philippinarum, was investigated. The result showed that, under different water temperature, the highest quantity of sand ejection was at 20℃, the value of which was 0.091 g, while the smallest one was only 0.058 g at 0℃. The highest releasing rate, 95.79%, could be seen in 20℃ group, while 0℃ group was the lowest one, 85.29%. Under different salinity, 30 psu group had the highest value, 0.057 g, and 0 psu (freshwater) group was the lowest one, only 0.026 g. At the same time, the highest releasing rate appeared at 25 psu, which was 90%. 0 psu group was the lowest one in releasing rate, 60.47%. According to these results, we recommend that the clams should be placed into the clear seawater with about 25 psu of salinity at near 20℃ to let the clams perform the self-depuration. Better quality of clams containing less impurity in the aquaculture and commerce could be obtained from this pre-treatment.

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