CAJ | 학술논문

研究了4种溶氧变动模式条件下，鱼夋鱼幼鱼肝脏和肌肉氧化应激指标的变化。试验结果表明，在“近饱和稳定”模式下，鱼体肝脏中氧化应激指标含量的变动比较一致，具有一定的变动节律，且肌肉中的大部分氧化应激指标高于肝脏。与“近饱和稳定”模式相比，“近饱和→最低溶氧”模式下肝脏大部分氧化应激指标显著升高，而肌肉中相应指标则明显下降。“近饱和→超饱和→近饱和→最低”模式肝脏的主要氧化应激指标变动的时间节律与“近饱和稳定”模式明显不同，并在次日溶解氧含量下降至最低值1．0mg／L时，抗氧化指标的含量有所回升。“超饱和→近饱和→近饱和恢复24h”模式下，肌肉中所有氧化应激指标与“近饱和稳定”模式相比均明显下降，并且变动节律与溶解氧含量的变动模式一致。在经历超饱和溶氧暴露后恢复24 h处理后，肝脏的抗氧化指标，只有总抗氧化能力最高值出现在溶氧超饱和期间，超氧化物歧化酶和抗超氧阴离子活力的最高值出现在溶氧降低至近饱和水平后的恢复阶段，肌肉中的抗氧化指标最高值则均出现在恢复阶段。溶解氧含量变动环境中，鱼的氧化应激指标与溶氧稳定的环境中相比在数值和变动节律上均出现变化，并表现出在溶解氧含量下降时储备抗氧化物质的现象。
연구료4충용양변동모식조건하，어준어유어간장화기육양화응격지표적변화。시험결과표명，재“근포화은정”모식하，어체간장중양화응격지표함량적변동비교일치，구유일정적변동절률，차기육중적대부분양화응격지표고우간장。여“근포화은정”모식상비，“근포화→최저용양”모식하간장대부분양화응격지표현저승고，이기육중상응지표칙명현하강。“근포화→초포화→근포화→최저”모식간장적주요양화응격지표변동적시간절률여“근포화은정”모식명현불동，병재차일용해양함량하강지최저치1．0mg／L시，항양화지표적함량유소회승。“초포화→근포화→근포화회복24h”모식하，기육중소유양화응격지표여“근포화은정”모식상비균명현하강，병차변동절률여용해양함량적변동모식일치。재경력초포화용양폭로후회복24 h처리후，간장적항양화지표，지유총항양화능력최고치출현재용양초포화기간，초양화물기화매화항초양음리자활력적최고치출현재용양강저지근포화수평후적회복계단，기육중적항양화지표최고치칙균출현재회복계단。용해양함량변동배경중，어적양화응격지표여용양은정적배경중상비재수치화변동절률상균출현변화，병표현출재용해양함량하강시저비항양화물질적현상。
The changes in oxidative stress indicators were studied in liver and muscle of the juvenile mullet Liza haematocheila under four patterns of dissolved oxygen levels .The results showed that the variation in oxidative stress indicators was consistent and rhythmical in liver ,lower than in muscle in the pattern nearly constantly saturated with dissolved oxygen .Most of the oxidative stress indicators were found to be increased significantly in liver in the pattern from nearly saturated to the minimum value of dissolved oxy‐gen ,but the opposite case in the muscle .There was significantly difference in rhythm of the oxidative stress indicators in liver under the pattern from nearly saturated ,super‐saturated ,and nearly saturated to minimum value of dissolved oxygen compared with that in the pattern of saturated dissolved oxygen .How‐ever ,the level of the oxidative stress indicators was found to be increased on the next day when the content of the dissolved oxygen was reduced to 1 .0 mg/L .In the pattern from over‐saturation ,nearly saturation to recovery from nearly saturation ,the content of oxidative stress indicators in muscle was declined sharply compared to the pattern of nearly saturated dissolved oxygen ,with the consistent change in rhythm with the content of dissolved oxygen .The maximal value of T‐AOC was observed in the supersaturated period , and the maximal SOD and T‐SOD activities in liver were found in the 24 h recovery stage after the nearly saturated period .In the muscle ,however ,the maximum value of all the oxidative stress indicators was ob‐served in the recovery stage .The findings indicated that the oxidative stress indicators in different pattern showed different dissolved oxygen contents and rhythm compared to the normal dissolved oxygen condi‐tion .T he mullet had positive response to the variation in dissolved oxygen patterns and maintained antiox‐idant substance during the lower dissolved oxygen level period .