Velvet Scoter (Melanitta fusca)

2020 ◽  
Author(s):  
Carles Carboneras ◽  
Guy M. Kirwan ◽  
Chris Sharpe
Keyword(s):  
Melanitta Fusca

Nesting Ecology of White-Winged Scoters (Melanitta fusca deglandi) at Redberry Lake, Saskatchewan

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 950-962
Author(s):  
Ray T. Alisauskas ◽  
F. Patrick Kehoe
Keyword(s):  
Nesting Ecology ◽  
Melanitta Fusca

scholarly journals First record of Melanitta fusca in the Republic of Korea and update on Northeast Asian records

2022 ◽  
Vol 7 (1) ◽  
Author(s):  
Amaël Borzée ◽  
◽  
Nial Moores ◽  
Keyword(s):  
East Asia ◽  
Korean Peninsula ◽  
First Record ◽  
Republic Of Korea ◽  
Review Of The Literature ◽  
The Third ◽  
Melanitta Fusca ◽  
The Republic ◽  
Northeast Asian

We report the first confirmed sighting of the globally Vulnerable Melanitta fusca (Anatidae, Anseriformes) from Yeongil Bay in Pohang in the Republic of Korea. Based on the review of the literature and published checklists of two separate databases (Birds Korea and eBird), we consider this to be the first record of M. fusca on the Korean Peninsula and only the third or fourth record of this species in coastal East Asia.

scholarly journals Triple stable isotope analysis to estimate the diet of the Velvet Scoter (Melanitta fusca) in the Baltic Sea

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5128 ◽  
Author(s):  
Rasa Morkūnė ◽  
Jūratė Lesutienė ◽  
Julius Morkūnas ◽  
Rūta Barisevičiūtė
Keyword(s):  
Stable Isotope ◽  
Baltic Sea ◽  
Isotope Analysis ◽  
Nitrogen Isotope ◽  
Enrichment Factors ◽  
Food Sources ◽  
Sandy Bottom ◽  
Sulphur Isotope ◽  
Winter Diet ◽  
Melanitta Fusca

This study quantifies contributions of different food sources in the winter diet of the Velvet Scoter (Melanitta fusca) in coastal waters of the Lithuanian Baltic Sea using non-lethal avian sampling. We highlight the application of stable sulphur isotope ratios as complementary to stable carbon and nitrogen isotope analysis in order to discriminate sandy bottom macrozoobenthos organisms as potential food sources for the Velvet Scoter. Selection of the most relevant trophic enrichment factors and Monte Carlo simulations in order to choose the best fitted model were undertaken. The stable isotope mixing model revealed the main contributions of a group of bivalves, Mya arenaria and Cerastoderma glaucum, to be 46–54%, and while the crustacean, Saduria entomon, comprised 26–35% of the diet.

scholarly journals The importance of offshore areas in southern Öresund, Sweden, for staging and wintering sea ducks

Ornis Svecica ◽  
2015 ◽  
Vol 25 (1–2) ◽  
pp. 24-39
Author(s):  
Martin Green ◽  
Leif Nilsson
Keyword(s):  
Somateria Mollissima ◽  
Time Pattern ◽  
Sea Ducks ◽  
National Importance ◽  
Mergus Merganser ◽  
Winter Peak ◽  
International Importance ◽  
Melanitta Fusca ◽  
Clangula Hyemalis ◽  
General Time

The occurrence of wintering and spring-staging sea ducks in the southern part of Swedish Öresund was surveyed from air and ship during the period 2001–2011. Altogether 22 air and 20 boat surveys were made during the months November–May and here we present the results regarding five commonly recorded sea ducks. We present the numbers recorded and the general time pattern of occurrence during winter and spring in the area. Recorded numbers are then used for evaluating the importance of the area, both in relation to national wintering totals as well as to international (Baltic) totals. Southern Swedish Öresund is of no larger importance for Long-tailed Duck Clangula hyemalis in winter and spring. The area is however of national importance for both Velvet Scoter Melanitta fusca and Common Scoter Melanitta nigra in winter. Peak numbers of Common Scoters do also reach international importance. Southern Swedish Öresund is of large national and international importance for both wintering and spring-staging Eider Somateria mollissima and Red-breasted Merganser Mergus merganser.

scholarly journals Nesting Ecology of White-Winged Scoters (Melanitta Fusca Deglandi) at Redberry Lake, Saskatchewan

The Auk ◽  
2004 ◽  
Vol 121 (3) ◽  
pp. 950-962 ◽  
Author(s):  
Joshua J. Traylor ◽  
Ray T. Alisauskas ◽  
F. Patrick Kehoe
Keyword(s):  
Function Analysis ◽  
Nest Success ◽  
Nest Survival ◽  
Population Decline ◽  
Negative Relationship ◽  
Nest Site Selection ◽  
Nesting Ecology ◽  
Habitat Features ◽  
Nest Sites ◽  
Melanitta Fusca

Abstract Population surveys indicate a trend of declining abundance of scoters (Melanitta spp.) in North America. Little is known about changes in life-history traits that may be responsible for the recent population decline of White-winged Scoters (Melanitta fusca deglandi). Therefore, we studied nesting ecology of White-winged Scoters at Redberry Lake, Saskatchewan, during the summers of 2000–2001. We found 198 nests and examined nest-site selection by comparing habitat features of successful nests, depredated nests, and random sites. Discriminant function analysis differentiated habitat features—measured at hatch—of successful nests, depredated nests, and random sites; lateral (r = 0.66) and overhead (r = 0.35) concealment were microhabitat variables most correlated with canonical discriminant functions. We also modeled daily survival rate of nests as a function of year, linear and quadratic trends with nest age, nest initiation date, and seven microhabitat variables. Nest survival from a time-constant model (i.e. Mayfield nest-success estimate) was 0.35 (95% CL: 0.27, 0.43). Estimates of nest success were lower than those measured at Redberry Lake in the 1970s and 1980s. Nest survival increased throughout the laying period and stabilized during incubation, and showed positive relationships with nest concealment and distance to water and a negative relationship with distance to edge. Considering those factors, a model-averaged estimate of nest survival was 0.24 (95% CL: 0.09, 0.42). We concluded that White-winged Scoters selected nesting habitat adaptively, because (1) successful sites were more concealed than depredated sites; (2) nest sites (both successful and depredated) had higher concealment than random sites; and (3) nest sites were on islands, where success is greater than on the mainland.

Velvet/White-winged Scoter (Melanitta fusca/deglandi)

1997 ◽  
Author(s):  
Patrick W. Brown ◽  
Leigh H. Fredrickson
Keyword(s):  
Melanitta Fusca

Phenology and duration of remigial moult in Surf Scoters (Melanitta perspicillata) and White-winged Scoters (Melanitta fusca) on the Pacific coast of North America

2012 ◽  
Vol 90 (8) ◽  
pp. 932-944 ◽  
Author(s):  
R.D. Dickson ◽  
D. Esler ◽  
J.W. Hupp ◽  
E.M. Anderson ◽  
J.R. Evenson ◽  
...  
Keyword(s):  
North America ◽  
Pacific Coast ◽  
Selective Pressure ◽  
Wing Loading ◽  
Melanitta Perspicillata ◽  
The Pacific ◽  
Wide Range ◽  
Melanitta Fusca ◽  
Remigial Moult ◽  
Age And Sex

By quantifying phenology and duration of remigial moult in Surf Scoters ( Melanitta perspicillata (L., 1758)) and White-winged Scoters ( Melanitta fusca (L., 1758)), we tested whether timing of moult is dictated by temporal optima or constraints. Scoters (n = 3481) were captured during moult in Alaska, British Columbia, and Washington, and remigial emergence dates were determined. We provide evidence for a pre-emergence interval of 7.3 days that occurs after old primaries are shed and before new ones become visible. All age and sex classes of both scoter species exhibited a wide range of emergence dates (Surf Scoters: 26 June to 22 September; White-winged Scoters: 6 July to 21 September) suggestive of a lack of strong temporal optima for remigial moult. For both species, timing of moult was influenced by site, year, age, and sex. Relative to other waterfowl species, scoters have typical remigial growth rates (Surf Scoters: 3.9 mm·day–1; White-winged Scoters: 4.3 mm·day–1) but a long flightless period (34–49 days), in part because their relatively high wing-loading requires a greater proportion of feather regrowth to regain flight. Our data suggest that moulting scoters are not under strong selective pressure to complete moult quickly.

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