Variability among autumn migration patterns of Mongolian Common Shelducks (Tadorna tadorna)

Wang, Xin; Cao, Lei; Batbayar, Nyambayar; Fox, Anthony D.

doi:10.1186/s40657-018-0138-1

Cited by 8 publications

(9 citation statements)

References 37 publications

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“…In this study, we only used locations categorized as A, B, and C. The migration routes and heat maps were created, and the cumulative migration distance was calculated via the geometry function in ArcGIS 10.2. The start and end of the migration time were defined as the date from which the individuals departed from and arrived at the breeding/summering or wintering sites (Wang et al, 2018). Migration duration was calculated as the time between the individual's start and end of the migration.…”

Section: Discussionmentioning

confidence: 99%

Satellite tracking reveals a new migration route of black-necked cranes (Grus nigricollis) in Qinghai-Tibet Plateau

Wang

Guo

2020

PeerJ

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Background The black-necked crane (Grus nigricollis) is a vulnerable species and the only species that lives in the plateau. Five migration routes of different populations have been identified, but for cranes wintering in Nyingchi Prefecture, Tibet, the migration route and breeding/summering area are still unknown. The aim of this study was to investigate the spatio-temporal migration patterns of black-necked cranes in this area and to identify important areas for conservation. Methods In 2016, we fitted seven black-necked cranes in Nyingchi with GPS-GSM satellite transmitters to record their migration routes. We used ArcGIS 10.2 to visualize important stopover sites and the ‘ggplot’ function in R to analyze the migration patterns. Results From March 2016 to May 2019, we recorded nine spring migration and four autumn migration tracks from five individuals. Four individuals spent the breeding/summering season in Qinghai Lake, while the other spent the breeding/summering season in the Jinzihai Wetland of Dulan County, Qinghai Province. Detailed spatio-temporal information showed that the spring migration lasted 8.7 ± 4.6 days and covered 1,182.5 ± 90.4 km, while the autumn migration lasted 30 ± 10.6 days and covered 1,455.7 ± 138 km. Basom Lake and the Shazhuyu River were the most important stopover sites during the spring and autumn migrations, respectively. The cranes spent 4.4 ± 3.7 days in Basom Lake and 26.3 ± 10.7 days in the Shazhuyu River. The black-necked cranes mainly migrated during the daytime (>85 % of the fly points), and 81 % (17/21) of all stopover and roosting sites were in the valley or at lakeside swamps. Only 17.7% (516 / 2,914) of the data points for stopover and roosting sites were in protected areas. Main conclusions Our study revealed the breeding/summering areas and migration routes of the black-necked cranes wintering in Nyingchi. These results contribute to a better understanding of the annual spatio-temporal migration patterns and the development of conservation plans for this vulnerable species.

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Section: Discussionmentioning

confidence: 99%

Satellite tracking reveals a new migration route of black-necked cranes (Grus nigricollis) in Qinghai-Tibet Plateau

Wang

Guo

2020

PeerJ

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“…Their species, body mass, and sex were recorded. A 17 g solar-powered GPS-GSM backpack transmitter (model HQBG2715S, Hunan Global Messenger Technology Co., Ltd., Hunan, China) was attached to each duck which fitted the criterion that mounted satellite transmitters should weigh ≤ 3% of the bird's body weight (Wang et al 2018; Kuang et al 2022). The individuals equipped with backpacks were placed into cages for further observation for about 1 hour before releasing.…”

Section: Methodsmentioning

confidence: 99%

“…The development of satellite tracking technology has made it possible to conduct long-term studies providing accurate and detailed spatial data on the migration of large waterbirds, such as White-naped Cranes ( Grus vipio ), Black-necked Cranes ( Grus nigricollis ), and Whooper Swans ( Cygnus cygnus ; Higuchi et al 1996; Wang et al 2020; Wang et al 2020; Ao et al 2020). In addition, the development of lighter satellite transmitters has recently allowed this technique to be used to study wild ducks (Takekawa et al 2010; Wang et al 2018). Eastern Spot-billed Ducks ( Anas zonorhyncha ) and Mallards ( Anas platyrhynchos ) are two of the dominant wintering waterfowl species in Shanghai City (Pei et al 2007), and have been reported to breed in Northeast Asia (Zhao 2001).…”

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confidence: 99%

Tracking Migration of Eastern Spot-Billed Ducks Anas zonorhyncha and Mallards Anas platyrhynchos Wintering in Shanghai, China

Ma,

Wei

et al. 2023

Waterbirds

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Millions of migratory waterfowl winter in the coastal wetlands in Shanghai City, among which Eastern Spot-billed Ducks and Mallards are among the most common species and are sensitive to infection with avian influenza virus. However, information on the migration behaviors of these two species in Northeast Asia is lacking. Therefore, GPS transmitters were used to track the migration of 13 Eastern Spot-billed Ducks and eight Mallards wintering in Shanghai during 2017–2020. Mallards covered a (mean ± standard deviation) migration distance of 1,663.69 ± 1,063.33 km, with wider variation than Eastern Spot-billed Ducks (1,639.24 ± 642.72 km), though the difference was not significant. Both species ended their northward migrations in Northeast Asia encircling the Yellow Sea, mainly in northeastern China. The dynamic Brownian bridge movement model confirmed that multiple stopover sites mainly located in the Korean Peninsula along the Yellow Sea coastline were crucial nodes for maintaining the stability and function of the migration network. This study confirmed the close relationships between habitats in the Korean Peninsula and China, indicating the importance of habitat conservation in related countries to the stability of the migration network. The results of this study additionally highlight the relationships between migration behaviors and outbreaks of avian influenza virus in Northeast Asia.

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“…For each individual, we defined spring migration as starting from the last position received from the overwintering area (Yangtze River floodplain) and terminating with the first position of a series of positions received from the summering grounds (Mongolian Plateau); autumn migration, summering, and wintering periods followed similar definitions (Li et al 2020a). We applied the methods of Wang et al (2018) to segment movement tracks, identifying flight legs between successive stopover sites, which were defined as locations where a bird did not move >30 km in a 48-h period (Kölzsch et al 2016, Li et al 2020a). Using this approach, we obtained the stages during the summering/wintering period and spring/autumn migration of each track of each individual to describe the habitats that these birds used for feeding and resting.…”

Section: Methodsmentioning

confidence: 99%

Exploring potential reasons for the increase in the East Asian Greylag GooseAnser anserpopulation by assessing habitat use and use of protected areas

Zhang

Li²,

Batbayar³

et al. 2022

Bird Conservation International

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Summary Among the six sympatric swan and goose species wintering in the Yangtze River floodplain, only Greylag Goose Anser anser and Bean Goose A. fabalis showed increasing population trends in the last 20 years. Until now, almost nothing was known about the Greylag Geese breeding on the eastern Mongolian Plateau, which we now know mostly winter in the Yangtze River floodplain. We applied GPS transmitters to 20 Greylag Geese in the Yangtze River floodplain and eastern Mongolia, providing complete tracks of their movements in summer, winter, spring and autumn (n = 6, 8, 8, 7). We overlaid these locations on GIS layers of habitat type and national-level protected areas, and modelled their habitat selection. Geese summered in Dauria Region, Huihe National Nature Reserve, and Wulagai Wetlands (from where 55% of GPS fixes were located in protected areas), wintered in Poyang Lake, Longgan Lake, and Anqing Lakes (43%), and staged around Bohai Bay, Xila Mulun River, and Wulagai Wetlands (spring, 48%; autumn, 45%). Geese mainly used natural ecosystems in summer (essentially grasslands and wetlands/water bodies), but in the other three seasons, used croplands between 17% (spring) and 46% (winter) of the time, with most of the rest of the time spent on wetlands/water bodies. Geese were frequently associated with wetlands and areas close to lakes/wetlands in all seasons, and cropland during winter and spring/autumn migration. These results suggest Greylag Geese in this biogeographical sub-population have increasingly shifted to feeding in croplands during the non-breeding season and enjoy the benefit of using protected areas throughout the year. We infer that these factors could have potentially contributed to elevated survival and reproductive success (relatively high among sampled flocks in recent years) which could explain the favourable conservation status of this population of Greylag Geese in recent years compared to other sympatric wintering goose and swan species.

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Variability among autumn migration patterns of Mongolian Common Shelducks (Tadorna tadorna)

Cited by 8 publications

References 37 publications

Satellite tracking reveals a new migration route of black-necked cranes (Grus nigricollis) in Qinghai-Tibet Plateau

Satellite tracking reveals a new migration route of black-necked cranes (Grus nigricollis) in Qinghai-Tibet Plateau

Tracking Migration of Eastern Spot-Billed Ducks Anas zonorhyncha and Mallards Anas platyrhynchos Wintering in Shanghai, China

Exploring potential reasons for the increase in the East Asian Greylag GooseAnser anserpopulation by assessing habitat use and use of protected areas

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