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Migration and wintering of vulnerable adult Chinese Egrets(egretta eulophotes)revealed by GPS tracking

Avian Research 2022年第3期13卷 285-293页

作者： Zhijun Huang Xiaoping Zhou Wenzhen Fang Xiaolin Chen Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems College of the Environment and EcologyXiamen UniversityXiamen361102China

Knowledge of migratory bird requirements is critical to developing conservation plans for vulnerable migratory *** study aimed to determine the migration routes,wintering areas,habitat uses,and mortalities of adult Chinese Egrets(egretta eulophotata).Sixty adult Chinese Egrets(31 females and 29 males)on an uninhabited offshore breeding island in Dalian,China were tracked using GPS satellite *** locations recorded at2 h intervals from June 2019 to August 2020 were used for analysis.A total of 44 and 17 tracked adults completed their autumn and spring migrations,*** with autumn migration,tracked adults displayed more diverse routes,higher number of stopover sites,slower migration speed,and longer migration duration in the *** indicated that migrant birds had different behavioral strategies during the two migratory *** spring migration duration and stopover duration for females were significantly longer than those for males.A positive correlation existed between the spring arrival and spring departure dates,as well as between the spring arrival date and stopover *** finding indicated that the egrets that arrived early at the breeding grounds left the wintering areas early and had a shorter stopover *** birds preferred intertidal wetlands,woodlands,and aquaculture ponds during *** the wintering period,adults preferred offshore islands,intertidal wetlands,and aquaculture *** Chinese Egrets showed a relatively low survival rate compared with most other common ardeid *** specimens were found in aquaculture ponds,indicating human disturbance as the main cause of death of this vulnerable *** results highlighted the importance of resolving conflicts between egrets and human-made aquaculture wetlands and protecting intertidal flats and offshore islands in natural wetlands through international *** results contributed to the hitherto unknown annual

关键词： egretta eulophotes Habitat selection Migration route Mortality Wintering area

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维普期刊数据库

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Autumn migration routes and wintering areas of juvenile Chinese Egrets(egretta eulophotes)revealed by GPS tracking

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Avian Research 2021年第4期12卷 469-476页

作者： Zhijun Huang Xiaoping Zhou Wenzhen Fang Hailong Zhang Xiaolin Chen Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems College of the Environment and EcologyXiamen UniversityXiamen 361102China Liaoning Provincial Center of Wildlife Conservation and Epidemic Disease Surveillance Dalian 116013China

Background:The vulnerable Chinese Egret(egretta eulophotes)is a long-distance migratory waterbird whose migration and wintering information is poorly *** study aims to identify the autumn migration routes and wintering areas of juvenile Chinese Egrets and determine the migration movement traits of this ***:Thirty-nine juvenile Chinese Egrets from the Fantuozi Island,an uninhabited offshore island with a large breeding colony of Chinese Egrets in Dalian,China,were tracked using GPS/GSM *** feathers from each tracked juvenile were collected for molecular identification of sex in the *** GPS locations,recorded at 2-h intervals from August 2018 to May 2020,were used for the ***:Of the 39 tracked juveniles,30 individuals began their migration between September and November,and 13 successfully completed their autumn migration between October and *** juveniles migrated southward via three migration routes,coastal,oceanic and inland,mainly during the *** migration duration,migration distance,flight speed,and stopover duration of the 13 juvenile egrets that completed migration averaged 5.08±1.04 days,3928.18±414.27 km,57.27±5.73 km/h,and 23.08±19.28 h,*** juveniles wintered in the coastal wetlands of Southeast Asia including those in the Philippines,Vietnam,and Malaysia,and only one successfully began its spring migration in June ***:This study newly finds that the oceanic route taken by juvenile Chinese Egrets,suggesting that the juveniles are able to fly over the Pacific Ocean without a ***,our novel data indicate that coastal wetlands along the East Asian-Australasian Flyway are important areas for both autumn migration stopover and the wintering of these juveniles,suggesting that international cooperation is important to conserve the vulnerable Chinese Egret and the wetland habitats on which it depends.

关键词： Autumn migration routes egretta eulophotes GPS tracking Juvenile bird Wintering area

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