scholarly journals The occurrence of the avian schistosome Allobilharzia visceralis Kolarova, Rudolfova, Hampl et Skirnisson, 2006 (Schistosomatidae) in the tundra swan, Cygnus columbianus (Anatidae), from North America

2007 ◽  
Vol 54 (2) ◽  
pp. 99-104 ◽  
Author(s):  
Sara V. Brant
Keyword(s):  
North America ◽  
Cygnus Columbianus ◽  
Tundra Swan

Four new species of feather mites (Acari: Analgoidea)

2002 ◽  
Vol 134 (5) ◽  
pp. 605-618 ◽  
Author(s):  
Sergei V. Mironov ◽  
Terry D. Galloway
Keyword(s):  
New Species ◽  
Hysteronotal Shield ◽  
Feather Mites ◽  
Prodorsal Shield ◽  
Cygnus Columbianus ◽  
Pelecanus Erythrorhynchos ◽  
Porzana Carolina ◽  
American White Pelican ◽  
Tundra Swan

AbstractFour new species of feather mites are described from birds in Canada: Megniniella ratcliffisp.nov. (Analgidae) and Metanalges holderisp.nov. (Analgidae) from the Sora, Porzana carolina (Linnaeus) (Gruiformes: Rallidae): Metingrassia pelecanisp.nov. (Xolalgidae) from the American White Pelican, Pelecanus erythrorhynchos Gmelin (Pelecaniformes: Pelecanidae); and Vingrassia cygnisp.nov. (Xolalgidae) from the Tundra Swan, Cygnus columbianus (Ord) (Ànseriformes: Anatidae). The genus Vingrassia is reinstated from its previous synonymy with the genus Ingrassia based on the presence of an enlarged prodorsal shield in both sexes, by the shape of the idiosoma and the interlobar membrane on the lobar apices in the male, and by the shape of the hysteronotal shield and the absence of setae ps2 in the female.

scholarly journals Changes in Tundra Swan Cygnus columbianus bewickii distribution and abundance in the Yangtze River floodplain

2011 ◽  
Vol 21 (3) ◽  
pp. 260-265 ◽  
Author(s):  
PEIHAO CONG ◽  
LEI CAO ◽  
ANTHONY D. FOX ◽  
MARK BARTER ◽  
EILEEN C. REES ◽  
...  
Keyword(s):  
Water Quality ◽  
Yangtze River ◽  
Poyang Lake ◽  
Submerged Vegetation ◽  
Three Gorges ◽  
The Yangtze River ◽  
Vegetation Productivity ◽  
River Floodplain ◽  
Cygnus Columbianus ◽  
Tundra Swan

Approximately 75% of the East Asian Flyway Tundra Swan Cygnus columbianus bewickii population winters in the Yangtze River floodplain, China. Historically the species was more widely distributed throughout the floodplain but now most of the population is confined to five wetlands in Anhui Province and to Poyang Lake in Jiangxi Province, where the majority (up to 113,000 birds) occur. Within-winter counts suggest that swans congregate at Poyang Lake before dispersing to other sites later in the winter. Counts show large between-year fluctuations, but suggest declines at Shengjin and Fengsha Lakes (both in Anhui) during the last five years. Declines at Shengjin Lake are likely due to decreases in submerged vegetation (particularly tuber-producing Vallisneria, a major food item) perhaps linked to eutrophication. Range contractions throughout the floodplain may also be linked to reductions in submerged vegetation coverage elsewhere. Changes in water quality and lake hydrology post-Three Gorges Dam may have adversely affected submerged vegetation productivity. Key information needs for the effective implementation of conservation measures for Tundra Swans include: (1) annual surveys of all major wintering sites throughout each winter to establish the importance of different sites during the non-breeding period; (2) more information on swan diets at important sites; and (3) an assessment of adverse effects of water quality and lake water levels post-Three Gorges Dam on submerged vegetation productivity at Poyang Lake and other important sites.

scholarly journals Population size dynamics and spatial distribution of Tundra Swan Cygnus columbianus wintering in Poyang Lake

2018 ◽  
Vol 30 (6) ◽  
pp. 1646-1654
Author(s):  
WEI Zhenhua ◽  
◽  
LI Yankuo ◽  
SHAN Jihong ◽  
WANG Lingfeng ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Population Size ◽  
Poyang Lake ◽  
Cygnus Columbianus ◽  
Tundra Swan

Estimation of nutrient input by a migratory bird, the Tundra Swan (Cygnus columbianus), to winter-flooded paddy fields

2015 ◽  
Vol 199 ◽  
pp. 1-9 ◽  
Author(s):  
Hiroaki Somura ◽  
Tsugiyuki Masunaga ◽  
Yasushi Mori ◽  
Ikuo Takeda ◽  
Jun’ichiro Ide ◽  
...  
Keyword(s):  
Migratory Bird ◽  
Paddy Fields ◽  
Nutrient Input ◽  
Cygnus Columbianus ◽  
Tundra Swan

Tundra Swan (Cygnus columbianus)

1994 ◽  
Author(s):  
R. J. Limpert ◽  
S. L. Earnst
Keyword(s):  
Cygnus Columbianus ◽  
Tundra Swan

Tundra Swan (Cygnus columbianus)

1994 ◽  
Author(s):  
R. J. Limpert ◽  
S. L. Earnst
Keyword(s):  
Cygnus Columbianus ◽  
Tundra Swan

Tundra Swan (Cygnus columbianus)

2020 ◽  
Author(s):  
R. J. Limpert ◽  
S. L. Earnst ◽  
Carles Carboneras ◽  
Guy M. Kirwan
Keyword(s):  
Cygnus Columbianus ◽  
Tundra Swan

Tundra Swan (Cygnus columbianus)

1994 ◽  
Author(s):  
R. J. Limpert ◽  
S. L. Earnst
Keyword(s):  
Cygnus Columbianus ◽  
Tundra Swan
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