Yongyao Guo (郭勇垚) , Tong Li (李童) , Li Liu (刘丽) , Tiancai Li (李天才) , Longjun Deng (邓龙君) , Siyi Zhu (朱思艺) , Shun Zhong (钟顺) , Qingjie Wang (王庆杰) , Dongjie Wang (王冬杰) , Wei Luo (罗伟) , Zongjun Du (杜宗君)
{"title":"基于行为评价的对不同驯化温度下平棘鱼(percocyis pingi, Tchang, 1930)耐热性的全面认识","authors":"Yongyao Guo (郭勇垚) , Tong Li (李童) , Li Liu (刘丽) , Tiancai Li (李天才) , Longjun Deng (邓龙君) , Siyi Zhu (朱思艺) , Shun Zhong (钟顺) , Qingjie Wang (王庆杰) , Dongjie Wang (王冬杰) , Wei Luo (罗伟) , Zongjun Du (杜宗君)","doi":"10.1016/j.jtherbio.2025.104233","DOIUrl":null,"url":null,"abstract":"<div><div>This study assessed the thermal limits of <em>Percocypris pingi</em>, initially reared at 9.86 °C. Fish were short-term acclimated to 12 °C, 18 °C, and 24 °C for two weeks, and their CT<sub>max</sub> and CT<sub>min</sub> were determined. A separate group underwent long-term acclimation in outdoor conditions, where water temperatures averaged 2.66 °C higher than the species' natural habitat. In September, when temperatures reached 28.91 °C, their CT<sub>max</sub> was re-evaluated. Behavioral indicators—swimming speed, shoal cohesion, and temperature preference—were used to support thermal tolerance assessments. Our findings indicate that <em>P. pingi</em> exhibits a narrow thermal tolerance range. Specifically, fish acclimated at 12 °C, 18 °C, 24 °C and long-term acclimation of 28.91 °C showed CT<sub>max</sub> values of 33.11 °C, 34.26 °C, 34.55 °C and 35.01 °C. Although CT<sub>max</sub> increases only slightly with higher acclimation temperatures, recovery after the CT<sub>max</sub> measurement was significantly impaired in the group acclimated at 24 °C for a short term. Only 13.33 % of individuals recovered within 30 min compared to 100 % in other groups. Behavioral analyses showed stable swimming speeds near CT<sub>max</sub> in the 18 °C and 24 °C groups, but heightened activity in the 12 °C group. Additionally, shoaling behavior became more dispersed during CT<sub>max</sub> testing. Temperature preference tests indicated a consistent inclination toward cooler zones (12–18 °C), suggesting that <em>P. pingi</em> may actively seek thermal refuges in natural environments to mitigate thermal stress. Habitat temperatures (19.5–27.6 °C) remain below the species’ thermal tolerance (>33 °C), according to WorldClim data. Our temperature and behavioral data provide a reliable assessment of thermal risks for <em>P. pingi</em> and offer guidance for its conservation under climate change.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"132 ","pages":"Article 104233"},"PeriodicalIF":2.9000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A comprehensive understanding of thermal tolerance in Percocypris pingi (Tchang, 1930) under different acclimation temperatures supported by behavioral assessments\",\"authors\":\"Yongyao Guo (郭勇垚) , Tong Li (李童) , Li Liu (刘丽) , Tiancai Li (李天才) , Longjun Deng (邓龙君) , Siyi Zhu (朱思艺) , Shun Zhong (钟顺) , Qingjie Wang (王庆杰) , Dongjie Wang (王冬杰) , Wei Luo (罗伟) , Zongjun Du (杜宗君)\",\"doi\":\"10.1016/j.jtherbio.2025.104233\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This study assessed the thermal limits of <em>Percocypris pingi</em>, initially reared at 9.86 °C. Fish were short-term acclimated to 12 °C, 18 °C, and 24 °C for two weeks, and their CT<sub>max</sub> and CT<sub>min</sub> were determined. A separate group underwent long-term acclimation in outdoor conditions, where water temperatures averaged 2.66 °C higher than the species' natural habitat. In September, when temperatures reached 28.91 °C, their CT<sub>max</sub> was re-evaluated. Behavioral indicators—swimming speed, shoal cohesion, and temperature preference—were used to support thermal tolerance assessments. Our findings indicate that <em>P. pingi</em> exhibits a narrow thermal tolerance range. Specifically, fish acclimated at 12 °C, 18 °C, 24 °C and long-term acclimation of 28.91 °C showed CT<sub>max</sub> values of 33.11 °C, 34.26 °C, 34.55 °C and 35.01 °C. Although CT<sub>max</sub> increases only slightly with higher acclimation temperatures, recovery after the CT<sub>max</sub> measurement was significantly impaired in the group acclimated at 24 °C for a short term. Only 13.33 % of individuals recovered within 30 min compared to 100 % in other groups. Behavioral analyses showed stable swimming speeds near CT<sub>max</sub> in the 18 °C and 24 °C groups, but heightened activity in the 12 °C group. Additionally, shoaling behavior became more dispersed during CT<sub>max</sub> testing. Temperature preference tests indicated a consistent inclination toward cooler zones (12–18 °C), suggesting that <em>P. pingi</em> may actively seek thermal refuges in natural environments to mitigate thermal stress. Habitat temperatures (19.5–27.6 °C) remain below the species’ thermal tolerance (>33 °C), according to WorldClim data. Our temperature and behavioral data provide a reliable assessment of thermal risks for <em>P. pingi</em> and offer guidance for its conservation under climate change.</div></div>\",\"PeriodicalId\":17428,\"journal\":{\"name\":\"Journal of thermal biology\",\"volume\":\"132 \",\"pages\":\"Article 104233\"},\"PeriodicalIF\":2.9000,\"publicationDate\":\"2025-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of thermal biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0306456525001901\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of thermal biology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306456525001901","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOLOGY","Score":null,"Total":0}
A comprehensive understanding of thermal tolerance in Percocypris pingi (Tchang, 1930) under different acclimation temperatures supported by behavioral assessments
This study assessed the thermal limits of Percocypris pingi, initially reared at 9.86 °C. Fish were short-term acclimated to 12 °C, 18 °C, and 24 °C for two weeks, and their CTmax and CTmin were determined. A separate group underwent long-term acclimation in outdoor conditions, where water temperatures averaged 2.66 °C higher than the species' natural habitat. In September, when temperatures reached 28.91 °C, their CTmax was re-evaluated. Behavioral indicators—swimming speed, shoal cohesion, and temperature preference—were used to support thermal tolerance assessments. Our findings indicate that P. pingi exhibits a narrow thermal tolerance range. Specifically, fish acclimated at 12 °C, 18 °C, 24 °C and long-term acclimation of 28.91 °C showed CTmax values of 33.11 °C, 34.26 °C, 34.55 °C and 35.01 °C. Although CTmax increases only slightly with higher acclimation temperatures, recovery after the CTmax measurement was significantly impaired in the group acclimated at 24 °C for a short term. Only 13.33 % of individuals recovered within 30 min compared to 100 % in other groups. Behavioral analyses showed stable swimming speeds near CTmax in the 18 °C and 24 °C groups, but heightened activity in the 12 °C group. Additionally, shoaling behavior became more dispersed during CTmax testing. Temperature preference tests indicated a consistent inclination toward cooler zones (12–18 °C), suggesting that P. pingi may actively seek thermal refuges in natural environments to mitigate thermal stress. Habitat temperatures (19.5–27.6 °C) remain below the species’ thermal tolerance (>33 °C), according to WorldClim data. Our temperature and behavioral data provide a reliable assessment of thermal risks for P. pingi and offer guidance for its conservation under climate change.
期刊介绍:
The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are:
• The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature
• The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature
• Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause
• Effects of temperature on reproduction and development, growth, ageing and life-span
• Studies on modelling heat transfer between organisms and their environment
• The contributions of temperature to effects of climate change on animal species and man
• Studies of conservation biology and physiology related to temperature
• Behavioural and physiological regulation of body temperature including its pathophysiology and fever
• Medical applications of hypo- and hyperthermia
Article types:
• Original articles
• Review articles