水生生物学报2017，Vol.41Issue(3)：538-542,5.DOI:10.7541/2017.69
温度驯化对尖头(鱼嵗)热耐受特征的影响
EFFECT OF TEMPERATURE ACCLIMATION ON THE THERMAL TOLERANCE OFRHYNCHOCYPRIS OXYCEPHALUS
摘要
Abstract
Temperature is one of the most important environmental factors that impact the physiological activities of fishes. Fishes exhibit thermal tolerance, which are influenced by temperature acclimation. Global climate change is one potential factor affect the survival and growth of fish species. Therefore, investigation of thermal tolerance of various fish species is of great importance.Rhynchocypris oxycephalus is a typical cold-water fish that might be influenced by the future global warming. The current study investigated thermal tolerance ofR. oxycephalus using critical thermal methodology by acclimating the fish to 14, 19, 24 and 29℃ temperature for two weeks. The results showed that thermal tolerance ofR. oxycephalus regulated by temperature acclimation, and that the critical thermal maxima (CTmax) in-creased with the increase of temperature acclimation, and that the averageCTmax were 32.29, 33.23, 33.40 and 35.71℃. The critical thermal minima (CTmin) decreased with the decrease of temperature acclimation, and the averageCTmin were 0.00, 0.10, 2.10 and 5.27℃. At the moderate acclimation temperature (19℃),R. oxycephalus has the widest thermal tolerance up to 33.13℃. The higher acclimation temperatures produced higher acclimation response ratio (ARR). The maximum ARR (0.46) of high temperatures occurred in the range of 24—29℃, while the maximum ARR of low temperatures, (0.63) occurred in 29—24℃. A thermal tolerance polygon in the range of 14 to 29℃ showed an area of 478.98℃2, which was similar with eurythermal fishes. These results indicated thatR. oxycephalus has strong ability for thermal adaption.关键词
尖头(鱼嵗)/热耐受/驯化温度Key words
Rhynchocypris oxycephalus/Thermal tolerance/Temperature acclimation分类
生物科学引用本文复制引用
俞丹,沈中源,张智,张晨,唐琼英,刘焕章..温度驯化对尖头(鱼嵗)热耐受特征的影响[J].水生生物学报,2017,41(3):538-542,5.基金项目
国家自然科学基金(31401968和31272306)资助 Supported by the National Natural Science Foundation of China (31401968, 31272306) （31401968和31272306）
