Oxygen Availability Affects Behavioural Thermoregulation of Turtle Embryos  

作　　者：Liang LIANG Weiguo DU 

机构地区：[1]Key Laboratory of Animal Ecology and Conservation Biology,Institute of Zoology,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Asian Herpetological Research》2023年第4期257-260,共4页亚洲两栖爬行动物研究（英文版）

基　　金：This work was supported by grants from the National Natural Science Foundation of China(32030013,31821001).

摘　　要：Extending recent findings that reptile embryos seek optimal temperatures inside eggs for thermoregulation,our study demonstrates that this thermoregulatory behaviour can be affected by the amount of oxygen available to an embryo.We exposed embryos of a freshwater turtle(Mauremys reevesii)to two heat sources(an optimal temperature of 30°C and a high temperature of 33°C)under three different oxygen levels–hypoxia(12%O2),normoxia(21%O2)and hyperoxia(30%O2)–and quantified the interactive effects of temperature and oxygen availability on embryonic thermoregulatory behaviour.Our results demonstrated that,in both thermal treatments,embryos exposed to hypoxia did not move as close to the heat source and therefore selected lower temperatures than those exposed to normoxia or hyperoxia.Embryos may select low temperatures under hypoxic conditions to decrease oxygen consumption and therefore alleviate the negative impact of hypoxic stress.

关 键 词：behavioural thermoregulation embryonic development heat tolerance HYPOXIA REPTILE 

分 类 号：Q958[生物学—动物学]