Melanitta perspicillata: BirdLife International

2016 ◽  
Author(s):  
Keyword(s):  
Melanitta Perspicillata

Surf Scoter (Melanitta perspicillata)

2015 ◽  
Author(s):  
Eric M. Anderson ◽  
Rian D. Dickson ◽  
Erika K. Lok ◽  
Eric C. Palm ◽  
Jean-Pierre L. Savard ◽  
...  
Keyword(s):  
Melanitta Perspicillata ◽  
Surf Scoter

Behavior and Survival of Rehabilitated Surf Scoters (Melanitta Perspicillata) Oiled during the Cosco Busan Spill on San Francisco Bay

2011 ◽  
Vol 2011 (1) ◽  
pp. abs281
Author(s):  
M. Ziccardi ◽  
R. Golightly ◽  
S. E. W. De La Cruz ◽  
J. Y. Takekawa ◽  
K. Spragens ◽  
...  
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
Melanitta Perspicillata

New definitive host, range extension, and notes on the morphology of Tristriata anatis Belopolskaia, 1953 (Trematoda, Notocotylidae) from southeast Alaska

1969 ◽  
Vol 47 (2) ◽  
pp. 265-266 ◽  
Author(s):  
George W. Frame
Keyword(s):  
North America ◽  
Host Range ◽  
Large Intestine ◽  
Definitive Host ◽  
Host Record ◽  
Species Description ◽  
New Host ◽  
Southeast Alaska ◽  
New Host Record ◽  
Melanitta Perspicillata

Two surf scoters (Melanitta perspicillata L.) from near Juneau, Alaska, were examined; a total of 22 Tristriata anatis Belopolskaia, 1953, were removed from the ceca and large intestine. This is the second reported discovery of T. anatis, the first in North America, and a new host record. The species description is expanded. Morphology and the influence of methods on interpretation of structures are discussed.

Foraging effort of Surf Scoters (Melanitta perspicillata) wintering in a spatially and temporally variable prey landscape

2007 ◽  
Vol 85 (12) ◽  
pp. 1207-1215 ◽  
Author(s):  
Molly K. Kirk ◽  
Daniel Esler ◽  
W. Sean Boyd
Keyword(s):  
Rocky Intertidal ◽  
Seasonal Effects ◽  
Soft Bottom ◽  
Foraging Effort ◽  
Melanitta Perspicillata ◽  
Shellfish Farm ◽  
Farm Structures ◽  
Strong Depletion ◽  
Full Day ◽  
Very High

We monitored foraging effort of radio-tagged Surf Scoters (Melanitta perspicillata (L., 1758)) in three different habitats: (1) shellfish farm structures with high densities of mussels and strong seasonal prey depletion, (2) soft-bottom clam beds with more stable but less available prey, and (3) rocky intertidal beds with moderate mussel densities and depletion rates. We predicted that foraging effort would vary uniquely by habitat, with effort increasing more where depletion was strongest. However, variation in both hourly and daily foraging efforts was best explained by date only. Effort per hour was lowest in early December (presumably owing to very high prey abundance), increased until mid-February as prey declined, and then decreased again in March (probably owing to increased daylight time for foraging). Foraging effort estimated over a full day increased steadily from December to March as prey were depleted. Temporal patterns of effort did not vary by habitat after accounting for seasonal effects. Instead of increasing foraging effort in habitats with strong depletion, Surf Scoters redistributed to habitats with lower degrees of prey reduction as the season progressed. We suggest that Surf Scoters respond to variation in prey by adjusting both foraging effort and habitat selection as the prey landscape changes.

scholarly journals Registros nuevos y notables de aves en el AICA Humedales de Alvarado, Veracruz

2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Axel Fuentes-Moreno ◽  
Helxin Fuentes Moreno ◽  
Roberto Carmona
Keyword(s):  
Gavia Immer ◽  
Melanitta Perspicillata

A partir del trabajo de campo realizado entre marzo de 2003 y enero de 2015 en los humedales de Alvarado (HA), reunimos aquíobservaciones de 10 especies de aves encontradas fuera de sus intervalos típicos de distribución o de las que, a pesar de estarpotencialmente presentes en ha, carecen o cuentan con pocos registros en el Área de Importancia para la Conservación de lasAves (AICA). Registramos por primera vez para esta área al colimbo mayor (Gavia immer) y al bobo enmascarado (Sula dactylatra);por segunda ocasión a la negreta nuca blanca (Melanitta perspicillata), la gaviota de Bonaparte (Chroicocephalus philadelphia),al reyezuelo de rojo (Regulus calendula) y al chipe de pradera (Setophaga discolor). Presentamos observaciones adicionales delmielero pata roja (Cyanerpes cyaneus) y de la tángara escarlata (Piranga olivacea), especies raras en el área; así como del jilguerodominico (Spinus psaltria) y la tórtola turca (Streptopelia decaocto), las cuales recientemente han expandido su distribución. Estosregistros pueden atribuirse a diferentes causas: conducta migratoria, fenómenos meteorológicos, introducción humana, modificacionesde hábitat e incremento del esfuerzo de observación.

scholarly journals Foraging Behaviors of Surf Scoters and White-Winged Scoters During Spawning of Pacific Herring

The Condor ◽  
2007 ◽  
Vol 109 (1) ◽  
pp. 216-222 ◽  
Author(s):  
Tyler L. Lewis ◽  
Daniel Esler ◽  
W. Sean Boyd
Keyword(s):  
Radio Telemetry ◽  
Search Time ◽  
Early Spring ◽  
Pacific Herring ◽  
Clupea Pallasi ◽  
Melanitta Perspicillata ◽  
Courtship Behaviors ◽  
Spawning Periods ◽  
Winter Diets

Abstract Abstract Winter diets of Surf (Melanitta perspicillata) and White-winged Scoters (M. fusca) are composed primarily of bivalves. During spawning of Pacific herring (Clupea pallasi) in early spring, scoters shift their diets to herring eggs. Using radio-telemetry, we contrasted scoter foraging behaviors between winter and herring spawning periods. Scoters increased their dive durations during herring spawning, likely to maximize the amount of roe consumed per dive; in winter, dives were typically terminated upon clam capture. Scoters spent approximately 50% less time foraging (min underwater hr−1) and decreased their dive rate (dives hr−1) by 70% when feeding on roe. The observed reduction in time spent foraging was presumably caused by the abundance of herring eggs, and thus a reduction in prey search-time. Scoters were able to meet energetic requirements with reduced effort, despite potentially increased demands related to spring fattening. Less time spent foraging may also allow more time for premigratory courtship behaviors.

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.

Sign in / Sign up

Export Citation Format

Share Document