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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Study on the migration routes of overwintering Cygnus columbianus in Dongting Lake based on satellite-tracking
Author of the article:HUANG Tian
Author's Workplace:College of Bioscience and Biotechnology, Hunan Agricultural University
Key Words:Cygnus columbianus; migration route; stopover; satellite tracking
Abstract:Conservation of Cygnus columbianus and restoration of their habitats depend on knowledge of migration routes, stopover sites, and overwintering patterns. In 2014-2017, satellite tracking was carried out on 18 C. columbianus individuals in the Dongting Lake and 38 800 positioning data points were collected. The study confirmed the central and eastern migration routes, and it revealed a newly discovered western route. The new route passes through Hubei, Henan, Shanxi, Shaanxi, Inner Mongolia, Mongolia, and Kazakhstan to reach the arctic tundra near the Kara Sea in the north of Yamalo-Nenets Autonomous Okrug in Siberia, Russia. On the western route, the birds traveled 6 715 km at 21.52 km·h-1 during spring migration and 7 467 km at 32.75 km·h-1 during autumn migration. On the central route, they traveled 2 083 km at 28.93 km·h-1 during spring migration. On the eastern route, they traveled 6 158 ± 272.9 km at an average speed of 28.71 ± 0.95 km·h-1 during spring migration and 5 216±162.6 km at 29.15±3.65 km·h-1 during autumn migration. The speed of migration during spring is slower than that during autumn, and the maximum speed is 133.3 km·h-1. The Yellow River wetland and the river valley wetlands on both sides of the Greater Khingan Mountains in the Inner Mongolia Autonomous Region are important transit stations during migration; the birds rest there for more than 15 days. This study increases knowledge of habitat perference and migration routes of C. columbianus, and it provides data useful for understanding the transmission of diseases such as avian flu.
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