Goldeneye (Bucephala clangula) Science Article 2 abstract We studied nest prospecting by Common Goldeneye (Bucephala clangula) females in north-central Minnesota. Adults unsuccessful in nesting, those with broods, and nonnesting yearlings were captured in nests while prospecting. Prospecting began in late May and continued into early July. Active nests received up to 25 prospecting visits per […]
Category: Anatidae
Host-parasite relatedness shown by protein fingerprinting in a brood parasitic bird
Goldeneye (Bucephala clangula) Science Article 1 abstract Brood parasitism as an alternative female breeding tactic is particularly common in ducks, where hosts often receive eggs laid by parasitic females of the same species and raise their offspring. Herein, we test several aspects of a kin selection explanation for this phenomenon in goldeneye ducks (Bucephala clangula) […]
The Origins of moulting Goosanders on the EdenEstuary
Goosander (Mergus merganser) Science Article 1 abstract Moulting Goosanders were counted on the Eden estuary, Fife, UK from 1979 to 1994, and some of these birds were caught and wing-tagged from 1992 to 1994. This paper documents changes in numbers of moulting birds, and their provenance, as determined from subsequent sightings. Goosanders only started to […]
Evolution ih the Breeding Habits of the Fulvous Tree Duck.
Fulvous Tree-Duck (Dendrocygna bicolor) Science Article 1 abstract Mr. Wanzer states that Dendrocygna fulva was first brought to his notice in June 1895, and that they have returned each subsequent season, arriving about the first of June, and that they did not seem to increase until about 1898, but since that time have increased withsuch […]
Fuelling rates of garganey ( Anas querquedula) stagingin the Camargue, southern France, during spring migration
Garganey (Anas querquedula) Science Article 1 abstract Most species of long-distance migratory birds put on energy stores to fuel their travels. However, recent studies have highlighted the potential costs associated with carrying too much fuel, either through increased predation risk or decreased .ight e.ciency. Consequently, it is now widely accepted that migratory birds should carry […]
Year-round movements of Northern Common Eiders Somateria mollissima borealis breeding in Arctic Canada and West Greenland followed by satellite telemetry.
Eider (Somateria mollissima) Science Article 7 abstract We implanted satellite transmitters to track Northern Common Eiders Somateria mollissima borealis from breeding grounds in West Greenland and eastern Arctic Canada, and from their wintering grounds in southwest Greenland. We compared distances moved, timing, duration, and patterns of movement between migration flyways and between spring and autumn […]
Sleep changes during long-term fasting in the incubating female Common Eider Somateria mollissima
Eider (Somateria mollissima) Science Article 6 abstract In the present study we have made observations of eye closure duration of Common Eider Somateria mollissima in the field, to determine the amount of time devoted to sleep during the incubation period, both in breeding and non-breeding females. Breeding females started to incubate with a higher level […]
Nesting success of common eiders Somateria mollissima as influenced by nest-site and female characteristics in the Gulf of the St. Lawrence
Eider (Somateria mollissima) Science Article 3 abstract In the common eider Somateria mollissima as well as in many other bird species, nesting success has been associated with female reproductive characteristics and predator accessibility to the nest site. In this study, we tested the following predictions on nesting common eiders: 1) female and nest-site characteristics are […]
Local movements, home ranges and body condition of Common Eiders Somateria mollissima wintering in Southwest Greenland.
Eider (Somateria mollissima) Science Article 8 abstract We examined local movements, home ranges and body condition of wintering Northern Common Eiders Somateria mollissima borealis in Southwest Greenland from late winter until spring migration in 2000 and 2001. At key marine habitats at coastal areas and in the inner fjord system of Nuuk, we implanted 33 […]
The cost of mate guarding in the Common Eider
Eider (Somateria mollissima) Science Article 9 abstract Amale biased sex ratio in Finnish Common Eiders (Somateria mollissima) results in unmated males interacting with eider pairs. We quantified the effects of mate guarding on other behaviors.Matedmales spent less time feeding and performed fewer dives than unmatedmales in 2003, but not in 2004.Acoldwinter in 2003 implies that […]