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자료유형
학술저널
저자정보
저널정보
한국수산과학회 Fisheries and Aquatic Sciences Fisheries and Aquatic Sciences 제8권 제3호
발행연도
2005.1
수록면
161 - 166 (6page)

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We examined the variation in survival and the respiration and filtration rates of Tresus keenae in response to changes in water temperature and salinity. The survivorship of animals exposed to temperatures below 25C for 7 days was 80%; however, all test animals died on the fourth day at 28C. The upper lethal temperature over 7 days was 25.9C. After exposure to lower temperatures, 93% of the animals survived at temperatures over 5C for 10 days. Survivorship rapidly decreased below 4C with all test animals dying at 2C on the eighth day. The LT50 over 10 days was 4.8C. The respiration and filtration rates of T. keenae increased as temperature increased. It is believed that energy consumption increases as a result of the increased respiration rate at temperatures above the upper lethal temperature. At temperatures below the lower lethal temperature, the metabolic rate of T. keenae was substantially lowered. In response to changes in salinity, the survivorship of T. keenae was 90% at 30.2 psu after exposure for 5 days; at below 26.8 psu, all test animals died by the fifth day. The LS50 was 29.1 psu. As salinity decreased, both the respiration rate and the filtration rate decreased. At 23.5 psu, the respiration and filtration rates decreased by 48 and 34%, respectively. These data have implications for increasing efficiency in the production and management of shellfish aquaculture farms.

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