禁食对胭脂鱼幼鱼游泳能力、热耐受能力和自发运动的影响  

FASTING ON SWIMMING PERFORMANCE,THERMAL TOLERANCE AND SPONTANEOUS ACTIVITY JUVENILE MYXOCYPRINUS ASIATICUS

作　　者：黄悌基 李秀明 樊美黠 付世建 HUANG Ti-Ji;LI Xiu-Ming;FAN Mei-Xia;FU Shi-Jian(Laboratory of Evolutionary Physiology and Behavior,Chongqing Key Laboratory of Animal Biology,Chongqing Normal University,Chongqing 401331,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

出　　处：《水生生物学报》2023年第6期950-957,共8页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金(31670418);重庆市自然科学基金(cstc2018jcyjAX0150和cstc2017jcyjAX0347);“成渝地区双城经济圈建设”科技创新项目(KJCX2020023)资助。

摘　　要：为了考察1—2周禁食对胭脂鱼(Myxocyprinus asiaticus)幼鱼游泳能力、热耐受能力和自发运动的影响,以胭脂鱼幼鱼[体质量(3.26±0.64)g,体长(5.32±0.32)cm]为实验对象,将其随机分成对照组、1周禁食组和2周禁食组测定其有氧运动能力及其代谢、热耐受能力和自发运动行为相关参数。结果发现:1周禁食组和2周禁食组的静止代谢和临界游泳速度与对照组没有显著性差异,但其最大代谢率、代谢空间、单位位移能量消耗、头高/头长及体高/体长显著低于对照组(P<0.05);1周禁食组和2周禁食组的临界低温和致死低温与对照组没有显著性差异,但其临界高温和致死高温显著高于对照组(P<0.05);1周禁食组和2周禁食组的运动总距离、平均运动速度和运动时间百分比与对照组没有显著性差异。综上所述:胭脂鱼幼鱼采取有氧运动能力和自发运动行为的维持策略应对1—2周禁食胁迫,这可能有利于维持其日常的觅食活动。此外,尽管对低温耐受没有显著影响,但1—2周的禁食显著提高了胭脂鱼幼鱼的高温耐受能力。To investigate the effects of fasting for 1—2 weeks on swimming performance,thermal tolerance and spontaneous activity juvenile Chinese sucker(Myxocyprinus asiaticus),the body mass and body length of 108 fish with(3.26±0.64)g and(5.32±0.32)cm were randomly divided into 3 groups,i.e.,control group,1 week and 2 weeks fasting group.Then,relevant parameters of swimming ability,thermal tolerance and spontaneous activity of these fishes were measured after different fasting times.Fasting for 1—2 weeks has no effects on the rest metabolic rate and critical swimming speed of M.asiaticus.Maximum metabolic rate,metabolic scope,cost of transport,head height/head length and body height/body length significantly increased in 1 week and 2 weeks fasting groups compared to that in control group(P<0.05).Fasting for 1—2 weeks has no effects on the critical thermal minimum and lethal thermal minimum of M.asiaticus.Critical and lethal thermal maximum significantly increased in 1 week and 2 weeks fasting groups compared to that in control group(P<0.05).Fasting for 1—2 weeks has no effects on the total movement distance,average movement speed and percent time spent moving of M.asiaticus.Our results suggested that aerobic swimming capacity and spontaneous activity of M.asiaticus was not affected by fasting for 1—2 weeks,which may be beneficial for maintaining their daily foraging activities.Moreover,fasting for 1—2 weeks has no significant impact on the low-temperature tolerance,but this stress can improve the high-temperature tolerance of M.asiaticus.

关 键 词：禁食 临界游泳速度 热耐受 自发运动 胭脂鱼 

分 类 号：S965.1[农业科学—水产养殖]