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The Influence of Oxygen on the Development of Nanorana parkeri Tadpoles

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【作者】 Xingzhi HANQiong ZHANGLiqing FANLe YANGZhensheng LIU

【Author】 Xingzhi HAN;Qiong ZHANG;Liqing FAN;Le YANG;Zhensheng LIU;College of Wildlife Resources, Northeast Forestry University;Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences;Tibet Agriculture and Animal Husbandry College;Tibet Plateau Institute of Biology;

【机构】 College of Wildlife Resources, Northeast Forestry UniversityKey Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of SciencesTibet Agriculture and Animal Husbandry CollegeTibet Plateau Institute of Biology

【摘要】 Ectothermic animals are tolerant of variable oxygen availability, whether low-oxygen levels constrain the fitness of ectotherms remains unclear. Nanorana parkeri, an anuran endemic to the southern Tibetan plateau, is an excellent model with which to answer this question. In this study, we raised tadpoles of N. parkeri in oxygenated water(high-oxygen group) and deoxygenated unchlorinated tap water(low-oxygen group) and monitored their growth, mortality, and telomere length. The growth rate for body length and body weight was higher in the low-oxygen group than in the high-oxygen group. However, dissolved oxygen did not affect development time, mortality, and telomere length of the tadpoles. These results suggest that although the oxygen concentration influenced some phenotype traits of plateau tadpoles, but it didn’t influence the telomere length and survival rate, potential explanations are the local adaptation and N. parkeri tadpoles’ wide oxygen tolerance, and fluctuant toxic content that resulted in little oxidative stress on tadpoles. These results indicated that low oxygen was not a stress to N. parkeri tadpoles’ fitness and survival. This study is helpful in understanding the adaptation mechanisms of Tibetan plateau amphibians.

【基金】 supported by National Natural Science Foundation of China (No. 31471994)
【所属期刊栏目】 ORIGINAL ARTICLE (2018年01期)
  • 【DOI】10.16373/j.cnki.ahr.170086
  • 【分类号】Q494
  • 【下载频次】2
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