温度和盐度胁迫下虹鳟和硬头鳟抗应激能力的比较
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  • 英文篇名:Comparisons of Anti-Stress Abilities of Rainbow Trout and Steelhead Trout Under Temperature and Salinity Stresses
  • 作者:吴仓仓 ; 付占斐 ; 王芳 ; 董双林
  • 英文作者:WU Cang-Cang;FU Zhan-Fei;WANG Fang;DONG Shuang-Lin;The Key Laboratory of Mariculture(Ocean University of China),Ministry of Education;Function Laboratory for Marine Fisheries Science and Food Production Processes,Qingdao National Laboratory for Marine Science and Technology;
  • 关键词:虹鳟 ; 硬头鳟 ; 温度 ; 盐度 ; 急性胁迫 ; 抗应激
  • 英文关键词:rainbow trout;;steelhead trout;;temperature;;salinity;;acute stress;;anti-emergency
  • 中文刊名:QDHY
  • 英文刊名:Periodical of Ocean University of China
  • 机构:海水养殖教育部重点实验室(中国海洋大学);青岛海洋科学与技术国家实验室海洋渔业科学与食物产出过程功能实验室;
  • 出版日期:2019-02-22
  • 出版单位:中国海洋大学学报(自然科学版)
  • 年:2019
  • 期:v.49;No.292
  • 基金:国家自然科学基金项目(31572634)资助~~
  • 语种:中文;
  • 页:QDHY201903012
  • 页数:14
  • CN:03
  • ISSN:37-1414/P
  • 分类号:99-112
摘要
为了查明虹鳟(Oncorhynchus mykiss)和硬头鳟(Oncorhynchus mykiss)海上养殖抗应激能力的差异,本研究将虹鳟((52.14±7.22)g)和硬头鳟((54.38±6.32)g)幼鱼的环境介质从水温16℃、盐度30突降至温度(13、10和7℃)和盐度(27、24、21)的不同组合环境,在突变前(0h)和突变后2、6、12、24和48h采集幼鱼血清样品,分析其抗氧化酶活力、丙二醛(MDA)和皮质醇(COR)含量,比较虹鳟和硬头鳟应对温度、盐度胁迫时的抗应激能力。研究发现:胁迫开始后,虹鳟和硬头鳟幼鱼血清中抗氧化酶活力和MDA含量均呈现先上升后下降的趋势;在胁迫24h后,过氧化氢酶(CAT)活力、谷胱甘肽过氧化物酶(GSH-PX)活力和MDA含量出现了回升;虹鳟血清COR含量始终上升,而硬头鳟血清COR含量到在胁迫后期开始下降。上述指标在胁迫过程中均显著高于对照组(P<0.05),表明温度、盐度突变48h后虹鳟和硬头鳟幼鱼仍处于应激状态。温度和盐度的交互作用多出现在胁迫12h内,对虹鳟上述指标的影响明显(P<0.05),对硬头鳟的超氧化物歧化酶(SOD)、CAT、GSH-PX、COR影响明显(P<0.05);且硬头鳟血清CAT和GSH-PX活性显著高于虹鳟(P<0.05),MDA和COR含量则显著低于虹鳟(P<0.05)。而在温度、盐度无显著交互影响时,温度效应较盐度更加明显。本实验结果初步表明:海上养殖遭遇台风暴雨天气时,硬头鳟抗应激能力强于虹鳟。
        In order to find out the difference in anti-emergency ability of rainbow trout(Oncorhynchus mykiss)and steelhead trout(O.mykiss)farmed in sea water,rainbow trout((52.14±7.22)g)and steelhead trout((54.38±6.32)g)juveniles were suddenly shifted from 16℃and salinity 30 to different combinations of temperatures(13℃,10℃,7℃)and salinities(27,24,21)with the serum collected before shifting(0 h)and at 2 h,6 h,12 h,24 hand 48 hafter shifting.The antioxidant enzyme activity and malondialdehyde(MDA)and cortisol(COR)contents were measured and used to compare the anti-emergency ability of rainbow trout and steelhead trout under temperature and salinity acute stressing.We found that the activities of antioxidant enzymes and MDA content of rainbow trout and steelhead trout increased first and then decreased upon being stressed,and after 24 hours of stressing,the activities of catalase(CAT)and glutathione peroxide(GSH-PX)and MDA content in serum started to return to the normal.In addition,the serum COR content of rainbow trout consistently increased whereas that of steelhead trout began to decline at the late phase of stressing.All these parameters of stressed fish individuals were significantly higher than those of the control(P<0.05),indicating that rainbow trout and steelhead trout were always under stressing.The interaction of temperature and salinity occurred mostly within 12 hours of stressing.The parameters measured of rainbow trout were significantly affected(P<0.05)while the the activities of superoxide dismutase(SOD),CAT and GSH-PX and COR content of steelhead trout changed significantly(P<0.05).Besides,the serum CAT and GSH-PX activities of steelhead trout were significantly higher than those of rainbow trout(P<0.05),and its contents of MDA and COR were significantly lower than those of rainbow trout(P<0.05).The temperature effect was more pronounced than salinity when the interactions between temperature and salinity were not significant.Therefore,the anti-emergency ability of steelhead trout is relatively stronger than that of rainbow trout under our experimental conditions.
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