Intraspecific variation in microhabitat selection in reintroduced Chinese giant salamanders  

作　　者：Chunlin Zhao Jianyi Feng Zijian Sun Wei Zhu Jiang Chang Wenbo Fan Jianping Jiang Bisong Yue Tian Zhao 

机构地区：[1]Key Laboratory of Bio-resources and Eco-environment(Ministry of Education),College of Life Sciences,Sichuan University,Chengdu 610064,China [2]CAS Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization and Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China

出　　处：《Current Zoology》2023年第2期121-127,共7页动物学报（英文版）

基　　金：supported by the National Key Programme of Research and'Development,Ministry of Science and Technology(2016YFC0503200);the Biodiversity Survey and Assessment Project of the Ministry of Ecology and Environment,China(2019HJ2096001006);the Construction of Basic Conditions Platform of Sichuan Science and TechnologyDepartment(2019JDPT0020);China Biodiversity Observation Networks(Sino BON).

摘　　要：Reintroduction of captive-bred Chinese giant salamanders is a primary approach for restoring wild populations.Despite previous studies have investigated the habitat preferences of reintroduced Chinese giant salamanders,the intraspecific variation in their habitat selection has been neglected.In the present study,30 captive-bred Chinese giant salamanders belonging to 3 groups(i.e.,10 males,10 females,and 10 juveniles)were released into a montane stream to explore whether intraspecific variation in habitat selection occurred in this species using radiotelemetry.Our results indicated that linear home range and daily movement of males were significantly higher than those of females and juveniles.Male sedentariness was significantly lower than that of females and juveniles.No significant differences were detected between females and juveniles in these measures.Importantly,we found that males preferred microhabitats with low water conductivity and deep water depth.Females preferred microhabitats with high water conductivity,low dissolved oxygen and ammonium-nitrogen,and slow current velocity,while juveniles occupied microhabitats with low ammonium-nitrogen.In addition,males and juveniles exhibited higher niche breadth than females.Niche overlap was high between adults and juveniles but low between males and females.Our study revealed the presence of spatial segregation in reintroduced Chinese giant salamanders.Males,females,and juveniles exhibited variation in microhabitat selection.These results provide important information for use when planning strategies for conservation of Chinese giant salamanders.

关 键 词：intraspecific variability microhabitatvariables NICHE REINTRODUCTION spatial segregation 

分 类 号：Q95[生物学—动物学]