Harlequin Duck (Histrionicus histrionicus)

1999 ◽  
Author(s):  
Gregory J. Robertson ◽  
R. Ian Goudie
Keyword(s):  
Histrionicus Histrionicus

Effects of ACTH, capture, and short term confinement on glucocorticoid concentrations in harlequin ducks (Histrionicus histrionicus)

2008 ◽  
Vol 149 (3) ◽  
pp. 275-283 ◽  
Author(s):  
Peter B. Nilsson ◽  
Tuula E. Hollmén ◽  
Shannon Atkinson ◽  
Kendall L. Mashburn ◽  
Pamela A. Tuomi ◽  
...  
Keyword(s):  
Short Term ◽  
Histrionicus Histrionicus ◽  
Harlequin Ducks

scholarly journals Effect of Food Availability on Arrival and Departure Decisions of Harlequin Ducks at Diurnal Feeding Grounds

The Condor ◽  
2001 ◽  
Vol 103 (4) ◽  
pp. 870-874 ◽  
Author(s):  
Michael S. Rodway ◽  
Fred Cooke
Keyword(s):  
Food Availability ◽  
Food Supplementation ◽  
Natural Food ◽  
Clupea Pallasi ◽  
Histrionicus Histrionicus ◽  
Before And After ◽  
Harlequin Ducks ◽  
Near Shore ◽  
Effect Of Food ◽  
Departure Decisions

Abstract We investigated three types of decisions made by Harlequin Ducks (Histrionicus histrionicus) in moving between nearshore feeding and offshore resting areas: when to move, whether to move synchronously, and whether to form dense flocks on the roosting grounds. We used the spawning of Pacific herring (Clupea pallasi) as a natural food-supplementation experiment. Birds arrived at nearshore feeding areas a few minutes later and departed almost an hour earlier relative to sunrise and sunset when spawn was available than before and after. Cloud cover and high winds resulted in earlier departures, especially during spawning. Arriving, departing, and offshore groups consisted most frequently of two ducks, and birds showed little tendency to synchronize movements or to form dense flocks when resting. Results indicate that Harlequin Ducks avoid crepuscular and nocturnal periods near shore when not constrained by food availability and the length of daylight in which to feed. Efecto de la Disponibilidad de Alimento en las Decisiones de Arribo y Partida de Histrionicus histrionicus en Áreas de Alimentación Diurna Resumen. Investigamos tres tipos de decisiones hechas por Histrionicus histrionicus (Pato Arlequín) al moverse entre áreas de alimentación cercanas a la costa y áreas de reposo mar adentro: cuándo moverse, si se mueven de modo sincrónico, y si forman bandadas densas en las áreas de reposo. Utilizamos el desove del arenque del Pacífico (Clupea pallasi) como un experimento de suplemento de alimento natural. En relación al amanecer y anochecer, las aves llegaron a las áreas de alimentación cercanas a la costa unos minutos después y se fueron casi una hora más temprano cuando los huevos de peces estuvieron disponibles que cuando no lo estuvieron, ya sea antes o después. Cobertura de nubes y fuertes vientos trajeron aparejadas partidas más tempranas, especialmente durante la etapa de desove. Los grupos que llegaban, partían y los que se encontraban mar adentro estuvieron en su mayoría conformados por dos patos, y las aves en general no tendieron a sincronizar sus movimientos o a formar grupos densos durante el reposo. Los resultados indican que H. histrionicus evita permanecer cerca de la costa durante períodos crepusculares y nocturnos cuando no se haya limitado por la disponibilidad de alimentos y por la cantidad de horas de luz para alimentarse.

Winter habitat associations of Purple Sandpiper (Calidris maritima) and Harlequin Duck (Histrionicus histrionicus) in Atlantic Canada

2019 ◽  
Vol 222 ◽  
pp. 214-225
Author(s):  
Sarah E. Gutowsky ◽  
Robert A. Ronconi ◽  
Lee F.G. Gutowsky ◽  
Mark F. Elderkin ◽  
Julie Paquet ◽  
...  
Keyword(s):  
Habitat Associations ◽  
Atlantic Canada ◽  
Winter Habitat ◽  
Histrionicus Histrionicus

scholarly journals Distribution and Conservation of the Harlequin Duck, Histrionicus histrionicus, in Greenland

2003 ◽  
Vol 117 (2) ◽  
pp. 249 ◽  
Author(s):  
David Boertmann
Keyword(s):  
Oil Spills ◽  
Breeding Population ◽  
Eastern Canada ◽  
Peak Period ◽  
West Greenland ◽  
Histrionicus Histrionicus ◽  
Harlequin Ducks ◽  
Clutch Initiation ◽  
Conservation Concern ◽  
Winter Population

The breeding range of the Harlequin Duck (Histrionicus histrionicus) in Greenland includes West Greenland to as far north as 72º 30’ N and a few sites in East Greenland. The breeding population is guessed at a few thousand pairs. During winter Harlequin Ducks occur along the West Greenland coast between Maniitsoq and Nanortalik. The size of the winter population is unknown. As Canadian males, which have moulted in Southwest Greenland, also winter there, perhaps accompanied by females and juveniles, the numbers may be considerable. The peak period for clutch initiation seems to be mid- to late June. There is no immediate conservation concern for the small breeding population of Harlequin Ducks in Greenland. However, there is a risk from marine oil spills along coasts where congregations of non-breeding Harlequin Ducks from both Greenland and eastern Canada occur.

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