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고수온 스트레스에 대한 둥근전복, Haliotis discus discus (Reeve, 1846), 말전복, Haliotis gigantea의 항산화 및 면역학적 반응
민은영(EunYoung Min),김신후(Shin Hu Kim),이정식(Jung Sick Lee),강주찬(Ju-Chan Kang) 한국패류학회 2017 The Korean Journal of Malacology Vol.33 No.2
A study was conducted to evaluate the effects of elevated water temperature on antioxidant and immunological response in the abalones, Haliotis discus discus and Haliotis gigantea. The abalones were exposed to various water temperature; 20, 21, 22, 24, 26 and 28℃ for 96 hours. After thermal stress for 96 hours, in the control, superoxide dismutase (SOD) activities in hepatopancreas of H. gigantea were higher (1.3 times) than the values in H. discus discus. Although SOD activities showed no significant differences in H. discus discus, the values in H. gigantea were significantly increased in 24℃ or higher compared to the control after 24 hours exposure. Catalase (CAT) activities in hepatopancreas of H. discus discus were higher (1.4 times) than the values of H. gigantea in the control. After thermal stress (≥ 26℃), CAT activities significantly increased in both species compared to the control. The phenoloxidase (PO) activity of hemolymph was decreased in both species exposed to high temperature (≥ 26℃) compared to the control (P < 0.05). The values of lysozyme were significantly decreased in H. discus discus exposed to 28℃, and in H. gigantea to 26℃. In conclusion, in both species, there was a significant increase on antioxidant abilities (CAT) and a decrease on immunological parameters (PO and lysozyme) after thermal stress of 26℃ or higher. Also, antioxidant enzymes, SOD activities significantly increased in H. gigantea, but there was no significance in H. discus discus after thermal stress. These results suggested that H. gigantea is considered to be more sensitive than H. discus discus on thermal stress even though the similar warm current type.
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조피볼락, Sebastes schlegeli의 혈액학적 성분변화에 미치는 구리 및 온도의 복합적 영향
백수경 ( Sukyong Baeck ),민은영 ( Eunyoung Min ),강주찬 ( Ju Chan Kang ) 한국어병학회 2014 한국어병학회지 Vol.27 No.1
Copper (CuSO4) has been widely used to control algae and pathogens in fish culture ponds. However, its toxic effects on fish depend not only on its concentration in water but also on water quality. The susceptibility of the rockfish, Sebastes schlegeli to copper was evaluated at three water-temperatures (WT; 18, 23 and 28℃) for 4 days. After the exposure of two copper concentrations (100 and 200 μg/L), a hematological effect was exerted on rockfish, by causing changes in red blood cell count and hematocrit value at 28℃. Total protein levels of the fish showed a tendency of co-increase with glucose depend on the WT, after copper exposure. However, the plasma calcium and magnesium levels were significantly increased at 200 μg/L copper, regardless of the WT. Enzymes activities including ALT and LDH in serum were also significantly increased depend upon the copper treatment only. This indicates that inorganic components and enzymes activities were sensitive indexes to stress by toxicant such as copper. The cortisol levels were significantly elevated by both WT rising and copper treatment in serum of rock fish. In conclusion, these changes can be seen as an initial response to temperature stress and as a sustaining response to copper exposure. The present findings suggest that a simultaneous stress by temperature change and copper exposure could accelerate an alteration of hematological and plasma biological parameters in the rockfish.
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