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Article
D. Shutler, Auteur ; R. G. Clark, Auteur ; S. T. Rutherford, Auteur ; A. Mullie, AuteurWe analysed total clutch volumes and condition of female ducks relative to their haemosporidian blood parasite loads. Twenty-four percent of Gadwalls Anas strepera and 60% of Mallards A. platyrhynchos were infected with at least one type of bloo[...]
Article
M. T. Bidwell, Auteur ; R. G. Clark, Auteur ; G. G. Mack, Auteur ; E. E. Dzus, Auteur ; S. M. Slattery, Auteur
Article
J. T. Pelayo, Auteur ; R. G. Clark, AuteurResearchers often use nasal saddles or discs to identify individuals in studies of waterfowl ecology, but previous studies showed that these markers may have detrimental effects on reproductive behavior and success of Ruddy Ducks (Oxyura jamaice[...]
Article
M. L. Mallory, Auteur ; L. Kiff, Auteur ; R. G. Clark, Auteur ; T. Bowman, Auteur ; P. Blums, Auteur ; A. Mednis, Auteur ; R. T. Alisauskas, AuteurEggs that are abnormally small are called runt eggs, and they occur in clutches across a wide variety of bird species. We surveyed waterfowl researchers to determine the natural frequency of occurrence of runt eggs in wild nesting ducks, geese, [...]
Article
R. W. Brook, Auteur ; R. G. Clark, AuteurForty-seven wild female Lesser Scaup (Aythya affinis) were marked with nasal markers and radio transmitters (implanted subcutaneously on the back) just prior to breeding near Yellowknife, Northwest Territories, in 1999 and 2000, Retention rate, [...]
Article
Wetland fidelity of female Mallard Anas platyrhynchos and Gadwall Anas strepera during brood rearing
R. G. Clark, Auteur ; S. W. Leach, Auteur ; K. W. Dufour, Auteur ; M. Gendron, AuteurDans Wildfowl (55 2005)Occurrence of and factors affecting fidelity to brood-rearing areas have received little attention in ducks; thus, data from individually marked female Mallard Anas platyrhynchos and Gadwall Anas strepera collected over 5-7 years were used to in[...]
