水生生物学报2017，Vol.41Issue(1)：201-205,5.DOI:10.7541/2017.25
秦岭细鳞鲑代谢及低氧耐受能力对温度驯化的响应
THE METABOLISM AND HYPOXIA TOLERANCE OF BRACHYMYSTAXLENOK TSINLINGENSIS IN RELATION TO TEMPERATURE ACCLIMATION
摘要
Abstract
Brachymystax lenok tsinlingensis, a second-class state-protected wild animal in the China Red Data Book of Endangered Animals, is generally regarded as one of the southernmost-distributed Salmonidae fish. Although tempera-ture is critical for the survival and distribution of this species, information on its thermal physiology is extremely li-mited. In order to investigate the metabolism and hypoxia tolerance of B. lenok tsinlingensis in relation to temperature acclimation, fish were acclimated to the experimental temperature (6℃, 12℃, and 18℃) for 4 weeks, and sealed respirome-ters were used to determine the physiological parameters [e.g., resting metabolic rate (RMR) and critical oxygen press (Pcrit)]. Our results showed that the RMR increased with an increase in the acclimation temperature. The Q10 of RMR at 6—12℃and 12—18℃were 2.59 and 2.77, respectively, suggesting that B. lenok tsinlingensis was of high sensitivity to temperature changes. The Pcrit increased with an increase in the acclimation temperature, and the values of Pcrit in-creased by 76.2%over the acclimation temperature range (6—18℃). Furthermore, significantly positive correlations were found between the Pcrit and the RMR. Our findings indicate that B. lenok tsinlingensis evolves poor physiological plasticity in response to hypoxic environment, and that increasing RMR at high temperatures may have contributed to the decreased hypoxia tolerance in B. lenok tsinlingensis.关键词
秦岭细鳞鲑/温度驯化/静止代谢率/低氧耐受/温度系数Key words
Brachymystax lenok tsinlingensis/Temperature acclimation/Resting metabolic rate (RMR)/Hypoxia tolerance/Temperature coefficient (Q10)分类
生物科学引用本文复制引用
夏继刚,陈梅,肖静,付世建..秦岭细鳞鲑代谢及低氧耐受能力对温度驯化的响应[J].水生生物学报,2017,41(1):201-205,5.基金项目
国家自然科学基金(31300340) （31300340）
重庆师范大学青年拔尖人才培育计划(14CSBJ08)资助[Supported by the National Natural Science Foundation of China (31300340) （14CSBJ08）
Youth Top-notch Talent Cultivation Program of Chongqing Normal University (14CSB J08) （14CSB J08）
