How incubation temperature affects hatchling performance in reptiles: an integrative insight based on plasticity in metabolic enzyme  

作　　者：Dan-Yang Wu Xing-Zhi Han Teng Li Bao-Jun Sun Xiao-Yan Qin 

机构地区：[1]College of Life and Environment Sciences,Minzu University of China,Beijing 100081,China [2]Key Laboratory of Animal Ecology and Conservational Biology,Institute of Zoology,Chinese Academy of Sciences,Beijing 10011,China [3]College of Wildlife and Protected Area,Northeast Forestry University,Harbin 150040,China [4]College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China

出　　处：《Current Zoology》2024年第2期195-203,共9页动物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31870391,32271572);supported by Youth Innovation Promotion Association Chinese Academy of Sciences(No.2019085).

摘　　要：Evaluating the effects of temperature variations on animals plays an important role in understanding the threat of climate warming.The effects of developmental temperature on offspring performance are critical in evaluating the effects of warming temperatures on the fitness of ovipa-rous species,but the physiological and biochemical basis of this developmental plasticity is largely unknown.In this study,we incubated eggs of the turtle Pelodiscus sinensis at low(24℃),medium(28℃),and high(32℃)temperatures,and evaluated the effects of developmental temperature on offspring fitness,and metabolic enzymes in the neck and limb muscles of hatchlings.The hatchlings from eggs incubated at the medium temperature showed better fitness-related performance(righting response and swimming capacity)and higher activities of metabolic enzymes(hexokinase,HK;lactate dehydrogenase,LDH)than hatchlings from the eggs incubated at high or low temperatures.In addition,the swimming speed and righting response were significantly correlated with the HK activities in limb(swimming speed)and neck(righting response)muscles,suggesting that the developmental plasticity of energy metabolic pathway might play a role in determining the way incubation temperature affects offspring phenotypes.Integrating the fitness-related performance and the activities of metabolic enzymes,we predict that the P sinensis from high latitude would not face the detrimental effects of climate warming until the average nest temperatures reach 32℃.

关 键 词：developmental plasticity energetic metabolism enzyme activity HATCHLING turtle. 

分 类 号：Q95[生物学—动物学]