温度对细鳞鲑幼鱼最大代谢率和代谢范围的影响  

Effects of Temperature on Maximum Metabolic Rate and Metabolic Scope of Juvenile Manchurian Trout,Brachymystax lenok( Pallas)

作　　者：徐革锋[1,2] 尹家胜[1] 韩英[2] 刘洋[1] 牟振波[1] 

机构地区：[1]中国水产科学研究院黑龙江水产研究所,哈尔滨150070 [2]东北农业大学动物科技学院水产系,哈尔滨150030

出　　处：《水生态学杂志》2014年第3期56-60,共5页Journal of Hydroecology

基　　金："十二.五"农村领域国家科技计划(2012BAD26B05);中央级公益性科研院所基本科研业务费专项(HSY201312)

摘　　要：为了探究温度对细鳞鲑(Brachymystax lenok)幼鱼的代谢特征和有氧运动能力的影响,在不同温度(4℃、8℃、12℃、16℃、20℃)下测定了实验鱼的静止代谢率(RMR)、有氧运动过程中的最大代谢率(MMR)以及能量代谢范围(MS)和临界游泳速度(UCrit)。结果表明,随着温度的上升,RMR和MMR均显著提高(P<0.05),各温度下的RMR和MMR分别较4℃条件的提高了62%(8℃)、165%(12℃)、390%(16℃)、411%(20℃)和3%(8℃)、34%(12℃)、111%(16℃)、115%(20℃);MS随水温的升高呈现下降的趋势,且4℃条件具有最大的代谢范围。不同温度条件下UCrit存在显著性差异,但随着温度升高未表现出明显的变化规律。有氧运动过程中,不同流速下测定的MMR多出现在70%UCrit附近,可能是由于无氧代谢过早启动,使得机体乳酸积累过多进,降低了有氧代谢水平。This study examined the effects of water temperature on the metabolic characteristics and aerobic exercise capacity of juvenile manchurian trout , Brachymystax lenok （ Pallas） .The resting metabolic rate （ RMR） ,maximum metabolic rate （MMR）, metabolic scope（MS）and critical swimming speed （UCrit） of juveniles were measured at different temperature （4, 8, 12, 16, 20℃）.The results showed that both the RMR and the MMR increased significantly with the increasing of water temperature （ P〈0 .05 ） .Compared with test group at 4℃, the RMR for 8℃, 12℃, 16℃ and 20℃increased by 62%, 165%, 390%, 411%,respectively, and the MMR increased by 3%, 34%, 111%, 115%, respectively .However , the MS decreased with the increasing of water temperature with the highest MS occurring at 4℃.UCrit was significantly affected by water temperature （P〈0.05）, but the variations of UCrit didn′t follow certain pattern with temperature .In the test of aerobic exercise , the MMR for each temperature level occurred at the swimming speed of 70% UCrit , probably due to the start of anaerobic metabolism , which caused excessive creatine in body , consequently hindered the aerobic metabolism .

关 键 词：细鳞鲑 代谢特征 临界游泳速度 Brachymystax lenok (Pallas) 

分 类 号：Q142[生物学—生态学]