scholarly journals The Common Eider by Chris Waltho and John CoulsonThe Common Eiderby Chris Waltho and John Coulson. 2015. T & AD Poyser, London, UK. 352 pages, 8 color plates, 146 text figures. $85 (hardcover). ISBN 978-1-4081-2532-8.

The Condor ◽  
2016 ◽  
Vol 118 (1) ◽  
pp. 194-195
Author(s):  
Gregory J. Robertson
Keyword(s):  
Common Eider ◽  
The Common

Female sociality in the common eider duck during brood rearing

1982 ◽  
Vol 60 (12) ◽  
pp. 3326-3331 ◽  
Author(s):  
J. K. Schmutz ◽  
R. J. Robertson ◽  
F. Cooke
Keyword(s):  
Maternal Care ◽  
Adaptive Significance ◽  
Common Eider ◽  
Somateria Mollissima ◽  
Brood Rearing ◽  
The Common ◽  
Nutrient Reserves ◽  
Prolactin Hormone

This study investigates the potential adaptive significance of the behavior of female common eider ducks (Somateria mollissima) which have no young of their own ("aunts") but accompany other females and young. "Aunts" exhibited ambivalent aggression and protection toward ducklings. There was no evidence that the presence of "aunts" enhanced the survival of the ducklings they accompanied. Both females which had their clutch removed and females which had not laid eggs behaved as "aunts." The level of circulating prolactin hormone in "aunts" was lower than in incubating females and similar to the basal level of males. We therefore rejected the hypothesis that maternal care was misdirected during hormonal adjustment from breeding to nonbreeding. We suggest that "aunts" which have lost a clutch or brood, spend some time feeding away from the colony, and then return to the nesting grounds after replenishing their nutrient reserves. Upon returning, "aunts" may select sites for nesting in future years. During this time, they are temporarily attracted to broods. We propose that "aunts" flock and fend off predators during an attack in an attempt to seek safety in a flock rather than to protect ducklings of other females.

scholarly journals Frequency, Timing and Costs of Intraspecific Nest Parasitism in the Common Eider

The Condor ◽  
1992 ◽  
Vol 94 (4) ◽  
pp. 871-879 ◽  
Author(s):  
Gregory J. Robertson ◽  
Michelle D. Watson ◽  
Fred Cooke
Keyword(s):  
Common Eider ◽  
Nest Parasitism ◽  
The Common ◽  
Intraspecific Nest Parasitism

Sex and age structures of the White Sea endemic population of the common eider Somateria mollissima

2010 ◽  
Vol 435 (1) ◽  
pp. 435-437 ◽  
Author(s):  
Yu. V. Krasnov ◽  
M. V. Gavrilo ◽  
A. A. Shavykin ◽  
P. S. Vashchenko
Keyword(s):  
White Sea ◽  
Common Eider ◽  
Somateria Mollissima ◽  
The White Sea ◽  
Endemic Population ◽  
The Common ◽  
Age Structures

Diving and Foraging in the Common Eider

1991 ◽  
Vol 22 (4) ◽  
pp. 349 ◽  
Author(s):  
Ron Ydenberg ◽  
Magella Guillemette
Keyword(s):  
Common Eider ◽  
The Common

scholarly journals Helminthes of the Common Eider (Somateria mollissima) on the Eastern Murman, its impact on the digestive activity and physiological state

2019 ◽  
Vol 487 (1) ◽  
pp. 107-110
Author(s):  
M. M. Kuklina ◽  
V. V. Kuklin
Keyword(s):  
Small Intestine ◽  
Species Composition ◽  
Intestinal Mucosa ◽  
Physiological State ◽  
Common Eider ◽  
Somateria Mollissima ◽  
Control Parameters ◽  
Hematological Indices ◽  
The Common ◽  
Digestive Activity

An ecological and physiological study of Common Eider (Somateria mollissima) nesting on the coast of Eastern Murman was carried out. The species composition of helminthofauna of birds and the quantitative parameters of the infection were studied. It is established that trematodes of the genus Microphallus, three species of cestodes - Lateriporus teres (Cestoda: Dilepididae), Fimbriarioides intermedia (Cestoda: Hymenolepididae), Microsomacanthus diorchis (Cestoda: Hymenolepididae) and one species of acanthocephalan - Polymorphus phippsi (Palaeacanthocephala: Polymorphidae) parasitized in the small intestine of Common Eider. It is shown that the activity of proteases decreased at the locations of F. intermedia and M. diorchis in the intestines of birds, with infestation with the acanthocephalan P. phippsi, on the contrary, increased. The activity of glycosides in the intestinal mucosa was reduced in comparison with the control values by infection cestodes M. diorchis. There was an increase in the values of hematological indices in infected individuals relative to the control parameters.

scholarly journals Seasonal weather effects on the common eider, a subarctic capital breeder, in Iceland over 55 years

2009 ◽  
Vol 38 ◽  
pp. 237-248 ◽  
Author(s):  
JE Jónsson ◽  
A Gardarsson ◽  
JA Gill ◽  
A Petersen ◽  
TG Gunnarsson
Keyword(s):  
Common Eider ◽  
Weather Effects ◽  
Capital Breeder ◽  
The Common ◽  
Seasonal Weather
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