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Article
Tom W. Pennycott, Auteur ; David Grant, Auteur ; Mardik F. Leopold, Auteur ; Ruedi G. Nager, AuteurThe diet of Herring Gulls Larus argentatus breeding in southwest Scotland in 2018 and 2019 was investigated by analysis of regurgitated pellets. Marine food items were found in 24.2% of 314 pellets, with the major items being Norway Lobster Neph[...]
Article
Bianca P. Vieira, Auteur ; Robert W. Furness, Auteur ; Ruedi G. Nager, AuteurIdentifying sexes in birds from visual observations could be a useful and inexpensive method. While sexual dichromatism and ornaments are readily used by observers, sexual size dimorphism can also be used to identify sexes in some bird species. [...]
Article
Bianca P. Vieira, Auteur ; Robert W. Furness, Auteur ; Ruedi G. Nager, AuteurMethods to obtain moult data from wild birds have not changed much over the last century and most studies still depend on checking museum specimens or capturing birds. Here we assess the applicability of systematic field photography for detectin[...]
Article
Ruedi G. Nager, Auteur ; Nina J. O'Hanlon, AuteurBetween-population variation of changes in numbers can provide insights into factors influencing variation in demography and how population size or density is regulated. Here, spatio-temporal patterns of population change of Herring Gull (Larus [...]
Article
Ruedi G. Nager, Auteur ; Heinz Hafner, Auteur ; Alan R. Johnson, Auteur ; Frank Cézilly, AuteurDans Ardea (98(3) 2010)Wetlands in the Mediterranean area have become a rare habitat due to human impact. To model the ecology and breeding biology of birds depending on that habitat, we describe long-term studies on two wetland birds (Little Egret Egretta garzetta an[...]
Article
Liliana D'Alba, Auteur ; Pat Monaghan, Auteur ; Ruedi G. Nager, AuteurModels of climate change predict that its effects on animal populations will not always be negative, but most studies indicate negative associations between changes in climate and the phenology of animal migration and reproduction. For some popu[...]
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Maria I. Bogdanova, Auteur ; Ruedi G. Nager, Auteur ; Pat Monaghan, AuteurThe quality of conditions provided by avian parents will have consequences for both parental and offspring fitness. While many components of avian reproduction appear to vary with parental age, the effect of age on incubation has largely been ig[...]
Article
Ruedi G. Nager, AuteurDans Ardea (94(3) 2006)Egg formation is a demanding process both in terms of energy and nutrient requirements. Birds must not only collect specific nutrients for egg formation, but must do so over a brief period when food may not yet be plentiful. Supplementary feedin[...]
Article
Andreas Nord, Auteur ; Marina Lehmann, Auteur ; Ross Macleod, Auteur ; Dominic J. McCafferty, Auteur ; Ruedi G. Nager, Auteur ; Jan-Ake Nilsson, Auteur ; Barbara Helm, AuteurBody temperature (T-b) is a valuable parameter when assessing the physiological state of animals, but its widespread measurement is often constrained by methods that are invasive or require frequent recapture of animals. Alternatives based on au[...]
