水生生物学报2025，Vol.49Issue(7)：31-38,8.DOI:10.7541/2025.2024.0375
秦岭细鳞鲑与拉氏鱥代谢特征及游泳能力的比较
COMPARATIVE STUDY OF METABOLIC CHARACTERISTICS AND SWIMMING PERFORMANCE BETWEEN BRACHYMYSTAX TSINLINGENSIS AND PHOXINUS LAGOWSKII
摘要
Abstract
Qinling lenok Brachymystax tsinlingensis,a threatened salmonid species endemic to the Qinling Mountain Range,is a second-class state-protected wild animal in China Red Data Book of Endangered Animals.This species is landlocked and adapted to cold-water environments,specifically occurring in Qinling streams together with Phoxinus lagowskii.In order to explore the interspecific differences in swimming performance and metabolic characteristics between B.tsinlingensis and their main prey fish P.lagowskii,the anaerobic exercise ability(i.e.,constant acceleration test speed,Ucat),aerobic exercise ability(i.e.,gait transition speed,Ugait,and critical swimming speed,Ucrit),resting metabolic rate(RMR),maximum metabolic rate(MMR),aerobic metabolic scope(MS),and the energetic cost of trans-port(COT)of wild populations of both species were measured using a Brett-type swimming tunnel respirometer.The results showed that:(1)the Ucrit and Ucat of B.tsinlingensis were higher than those of P.lagowskii(P<0.05),but there was no significant difference in the relative swimming abilities(including rUgait,rUcrit,and rUcat)between the two species(P>0.05).(2)The RMR,MMR,and MS of B.tsinlingensis were significantly higher than those of P.lagowskii(P<0.05).Morover,both the oxygen consumption rate and COT of B.tsinlingensis at a specific swimming speed were higher than those of P.lagowskii.(3)The Ucrit of B.tsinlingensis showed a significant positive correlation or a trend of positive correlation with MS and MMR,while the Ucrit of P.lagowskii was not correlated with either MS or MMR(P>0.05).The results suggest that the relative swimming performance of B.tsinlingensis is similar to that of P.lagowskii,whereas the swimming efficiency of B.tsinlingensis is lower.On the other hand,B.tsinlingensis have greater metabolic potential,which is an important driving force for supporting their swimming performance.These findings are expected to provide a theoretical reference for studying the conservation physiology of B.tsinlingensis and understanding the dynamics of interspecific relationships in Qinling stream ecosystems.关键词
临界游泳速度/有氧代谢空间/游泳效率/种间关系/秦岭细鳞鲑Key words
Critical swimming speed/Aerobic metabolic scope/Swimming efficiency/Interspecific interactions/Brachymystax tsinlingensis分类
生物学引用本文复制引用
吴奇,王洪,王丽英,彭敏锐,郑雪丽,李平,付世建,夏继刚..秦岭细鳞鲑与拉氏鱥代谢特征及游泳能力的比较[J].水生生物学报,2025,49(7):31-38,8.基金项目
国家自然科学基金面上项目(32470511) （32470511）
重庆市自然科学基金(CSTB2024NSCQ-LZX0061) （CSTB2024NSCQ-LZX0061）
重庆师范大学"博望学者"领军人才计划 （）
质兰基金会项目(2024010531B)资助[Supported by the National Natural Science Foundation of China(32470511) （2024010531B）
the Natural Science Foundation of Chongqing(CSTB2024NSCQ-LZX0061) （CSTB2024NSCQ-LZX0061）
the Leading Talent Program for BoWang Scholars of Chongqing Normal University （）
the Zhilan Foundation Program(2024010531B)] （2024010531B）
