scholarly journals The effects of human activities on diurnal energy expenditure of Tundra Swan Cygnus columbianus foraging in paddy field during the late wintering period

2019 ◽  
Vol 31 (1) ◽  
pp. 195-201
Author(s):  
YU Chao ◽  
◽  
ZHOU Lizhi ◽  
SONG Yunwei
Keyword(s):  
Energy Expenditure ◽  
Paddy Field ◽  
Human Activities ◽  
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

scholarly journals PO-211 Reliability and Validity of Measuring Energy Expenditure in Inline and Shuttle Running with Honor and Lifesense Fitness Wristbands

2018 ◽  
Vol 1 (5) ◽  
Author(s):  
Liankai Ge ◽  
Kaixuan Wang ◽  
Xiaotian Li ◽  
Lu Jin ◽  
Xinxin Wang ◽  
...  
Keyword(s):  
Physical Activity ◽  
Energy Expenditure ◽  
Human Activities ◽  
Respiratory Quotient ◽  
Reliability And Validity ◽  
Correlation Coefficients ◽  
Reliability Test ◽  
Retest Reliability ◽  
Test Retest Reliability ◽  
Acceptable Reliability

Objective Energy expenditure is an indicator that comprehensively reflects the amount of physical activity. Fitness wristbands are used to monitor the energy expenditure of human activities in the fitness field. Among the fitness wristbands popular in China, Honor and Lifesense rank in the top list. However, there was no research on the reliability and validity of these two wristbands in measuring the energy expenditure. This study aims to evalute the reliability and validity of the two fitness wristbands (Honor and Lifesense) in measuring the energy expenditure in inline and shuttle running. Methods 18 male collegiate students (age: 22.4±2.5yrs, height: 177±7cm, mass: 69.3.±8.4kg) volunteered to participate in two four-stage incremental inline running tests (8km/h, 10km/h, 12km/h, 14km/h) and two 20m four-stage incremental shuttle running test (6km/h, 8km/h, 10km/h, 12km/h). The duration of each stage was 5 min, and intermittent per stage was 1 min. Honor B3（GMN-BX9, Honor, China） and Lifesense Mombo2（LS417-B, Lifesense, China）fitness wristbands was utilized to measure the energy expenditure of each stage in incremental inline and shuttle running. A portable spirometric system (K4b2, Cosmed, Italy) was utilized to measure the ventilator information during the test. The energy expenditure was converted into equivalent units (kcal) according to the measured respiratory quotient coefficient. The repeat measuremented reliability test was carried out on the energy expenditure indicators measured by the fitness wristbands in the twice incremental inline running and the shuttle running. The energy expenditure calculated by the portable gas metabolic instrument was comparedwith those  measured by Honor and Lifesense fitness wristbands. Results The result test-retest reliability found that the Honor and Lifesense fitness wristbands had well correlations between the two tests at a speed of 8km/h, 10km/h, 12km/h in inline running, and 8km/h, and 10km/h in shuttle running (r=0.44~0.93, P<0.05), but the correlation was not well at 6km/h in shuttle running (r<0.43, P>0.05). The Honor wristband correlation (r=0.83~0.93, P<0.05) was higher than the Lifesense fitness wristbands (r=0.44~0.60, P<0.05) at 8km/h, 10km/h, and 12km/h in inline running and at 8km/h, and 10km/h in shuttle running. The correlation coefficients of the two fitness wristbands at 8km/h and 10km/h in inline running (r=0.52~0.93, P<0.05) were both higher than those in shuttle running (r=0.44~0.83, P<0.05). The energy expenditure measured by K4b2 and the two kinds fitnees wristband was significantly different (P<0.05), except at 12km/h in inline running and 10km/h in shuttle running (P > 0.05).  Conclusions Honor and Lifesense wristbands have acceptable reliability in measuring energy expenditure at 8, 10, 12km/h in inline and shuttle running, with the fore slightly higher than the after. The two wristbands have higher reliability in measuring the energy expenditure in inline running than in shuttle running. The validity of measuring the energy expenditure with the two fitness wristbands is acceptable at 12km/h in inline running and at 10km/h in shuttle running, but not at other speed.

Tundra Swan (Cygnus columbianus)

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

Export Citation Format

Share Document