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 .
出处
《水生态学杂志》
北大核心
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)
作者简介
徐革锋，1979年出生，男，副研究员，主要从事冷水性鱼类行为生态学研究。E—mail：xgffish@hotmail．com
韩英，E-mail：hanying一606@163．com；
牟振波，E-mail：mouzhenbo@163．com
