해수 중 이산화탄소의 증가가 넙치(Paralichthys olivaceus)의 초기성장에 미치는 영향

Abstract

Due to the high concentration of CO2 in atmosphere, ocean is becoming acidified. However, little is known about how fishes respond to the reduced pH condition. We reared newly hatched larvae of the olive flounder, Paralichthys olivaceus in three different concentrations of CO2 (400, 850 and 1500 ppm atmospheric CO2) for up to 28-days to examine the acidification impacts on early life stages of fish. After 4 weeks, all fish larvae were sampled and body lengths were measured for growth comparison. Whole body of fish larvae were vaccum freeze dried, and the concentration of calcium and some trace elements were measured using ICP-AES. Results indicated that body length and weight of flounder larvae were significantly increased with increasing carbon dioxide concentration (P<0.05). Calcium and trace elements also revealed increasing tendency with increasing CO2 in seawater, although there was no statistically significant difference.