力竭运动胁迫对三种鲤科鱼类低氧耐受和热耐受的影响  

EXHAUSTION EXERCISE STRESS ON HYPOXIA AND THERMAL TOLERANCES OF THREE CYPRINID SPECIES

作　　者：张永飞 黄可人 罗玉莲 刘蒨莹 庞旭[2] 付世建 ZHANG Yong-Fei;HUANG Ke-Ren;LUO Yu-Lian;LIU Qian-Ying;PANG Xu;FU Shi-Jian(Laboratory of Evolutionary Physiology and Behavior,Chongqing Key Laboratory of Animal Biology,Chongqing Normal University,Chongqing 401331,China;College of Fisheries,Southwest University,Chongqing 400715,China)

机构地区：[1]重庆师范大学进化生理与行为学实验室,重庆市动物生物学重点实验室,重庆401331 [2]西南大学水产学院,重庆400715

出　　处：《水生生物学报》2023年第12期1986-1992,共7页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(31670418);重庆市研究生科研创新项目(CYS22570)资助。

摘　　要：为了研究力竭运动胁迫对不同生境鱼类低氧耐受和热耐受能力的影响,以金鱼(Carassius auratus)、中华倒刺鲃(Spinibarbus sinensis)和鲤(Cyprinus carpio)为研究对象,分别测定这3种鲤科鱼类在力竭运动后的临界氧压(Critical oxygen tension,P_(crit))、失衡点(Loss of equilibrium,LOE)、临界代谢率(Critical metabolic rate,CMR)、边际代谢率(Marginal metabolic rate,Marginal MR)和临界温度[Critical temperature,CT(临界高温,CT_(max)和临界低温,CT_(min))、致死温度LT(致死高温,LT_(max)和致死低温,LTmin)]。结果显示,仅CT_(min)具有体重效应,其余各参数的体重效应均不显著;低氧耐受和热耐受各参数在种间差异均显著;力竭运动胁迫导致了鲤的P_(crit)和3种鱼的CMR显著增加,但致使中华倒刺鲃的LOE显著降低;同时,也导致金鱼和中华倒刺鲃的CT_(max)显著下降;除了上述鱼种及其对应的实验参数外,对各鱼种的全体实验参数均无显著影响。研究表明,不同生境鱼类在力竭运动胁迫后低氧耐受和热耐受能力变化具有差异,且不同鱼类在力竭运动胁迫后,若再次遭受其他环境因子胁迫时具有不同的生理响应机制,这可能与其能量代谢模式有关。The hypoxia and thermal tolerances of fish are important physiological characteristics that determine their distribution,habitat change,and adaptability to climate change.While in the nature,fish are always in the process of swimming or recovery of post-exercise,whether the hypoxia and thermal tolerances change during swimming or immediately after exhaustive recovery process is unknown for fish.Thus,to study the effects of exhaustion exercise stress on fish hypoxia and thermal tolerances,we investigated three cyprinid fish species(i.e.Carassius auratus,Spinibarbus sinensis and Cyprinus carpio) living in different habitats as study cases.Hypoxia and the thermal tolerance indicators of the three fish species were measured after exhaustion exercise,respectively,to determine whether exhaustion exercise stress would affect the stress resistance of fish.In the present study,we found that body weight only affected significantly on minimal critical temperature(CT_(min)),and the indicators of hypoxia and thermal tolerances were different significantly between species.Moreover,exhaustion exercise stress led to a significant increase in critical oxygen tension(P_(crit)) of common carp and a significant increase in critical metabolic rate(CMR) of all the three species as well,but a significant decrease in point of oxygen tension for loss of equilibrium(LOE) of qingbo.Meanwhile,it also resulted in a significant decrease in maximal critical temperature(CT_(max)) of goldfish and qingbo.However,there was no significant effect on the species and other related measured parameters besides the fish species and their corresponding experimental parameters mentioned above.It could be said based on the results that changes in the hypoxia and thermal tolerances of fish living in different habitats are different after exhaustion exercise stress,and that fish species vary in physiological mechanisms responding to other environmental stressors following exhaustion exercise stress,which may be related to difference in their energy metabolism

关 键 词：力竭运动 临界氧压 失衡点 临界温度 致死温度 能量代谢 鲤科鱼类 

分 类 号：Q958.1[生物学—动物学]