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Article
Enrique Rubio, Auteur ; Olivia Sanllorente, Auteur ; B. Irene Tieleman, Auteur ; Juan Diego Ibáñez-Álamo, AuteurMost altricial birds remove their nestlings’ feces from the nest, but the evolutionary forces driving this behavior are poorly understood. A possible adaptive explanation for this could be that birds avoid the attraction of nest predators to the[...]
Article
Chima J. Nwaogu, Auteur ; B. Irene Tieleman, Auteur ; Kwanye Bitrus, Auteur ; Will Cresswell, AuteurBergmann’s rule, defined as the tendency for endotherms to be larger in colder environments, is a biophysical generalization of body size variation that is frequently tested along latitudinal gradients, even though latitude is only a proxy for t[...]
Article
Joseph Mwangi, Auteur ; Henry K. Ndithia, Auteur ; Rosemarie Kentie, Auteur ; Muchane Muchai, Auteur ; B. Irene Tieleman, AuteurNest survival is critical to breeding in birds and plays an important role in life-history evolution and population dynamics. Studies evaluating the proximate factors involved in explaining nest survival and the resulting temporal patterns are b[...]
Article
Chima J. Nwaogu, Auteur ; B. Irene Tieleman, Auteur ; Will Cresswell, AuteurIn some tropical birds, breeding seasonality is weak at the population level, even where there are predictable seasonal peaks in environmental conditions. It therefore remains unclear whether individuals are adapted to breeding at specific times[...]
Article
Kevin D. Matson, Auteur ; Maaike A. Versteegh, Auteur ; Marco van der Velde, Auteur ; B. Irene Tieleman, AuteurRelationships between avian physiology and bacterial assemblages in the cloaca are poorly understood. We used molecular techniques to analyze cloacal swabs from pigeons that were subjected to two immunological manipulations: lysozyme supplementa[...]
Article
Libor Praus, Auteur ; Arne Hegemann, Auteur ; B. Irene Tieleman, Auteur ; Karel Weidinger, AuteurPredation is a major cause of breeding failure in bird species with open nests. Although many studies have investigated nest predation rates, direct identification of nest predators is sporadic, especially in (semi-)natural habitats. We quantifi[...]
Article
B. Irene Tieleman, Auteur ; Maaike A. Versteegh, Auteur ; Anthony Fries, Auteur ; Barbara Helm, Auteur ; Niels J. Dingemanse, Auteur ; H. Lisle Gibbs, Auteur ; Joseph B. Williams, AuteurDespite their central importance for the evolution of physiological variation, the genetic mechanisms that determine energy expenditure in animals have largely remained unstudied. We used quantitative genetics to confirm that both mass-specific [...]
Article
Deborah M. Buehler, Auteur ; B. Irene Tieleman, Auteur ; Theunis Piersma, AuteurWe studied subspecies, age and environmental effects on constitutive immune function (natural antibody and complement titres, haptoglobin activity and leukocyte concentrations) in Red Knots (Calidris canutus). We compared C. c. islandica and C. [...]
Article
Chima J. Nwaogu, Auteur ; Maurine W. Dietz, Auteur ; B. Irene Tieleman, Auteur ; Will Cresswell, AuteurBirds should store body reserves if starvation risk is anticipated; this is known as an 'interrupted foraging response'. If foraging remains unrestricted, however, body mass should remain low to limit the predation risk that gaining and carrying[...]
Article
Deborah M. Buehler, Auteur ; Theunis Piersma, Auteur ; B. Irene Tieleman, AuteurExperiments on captive animals, in which conditions can be controlled, are useful for examining complex biological phenomena such as immune function. Such experiments have increased our understanding of immune responses in the context of trade-o[...]
Article
Arne Hegemann, Auteur ; Henk P. van der Jeugd, Auteur ; Merlijn de Graaf, Auteur ; Lotte L. Oostebrink, Auteur ; B. Irene Tieleman, AuteurIn recent years, Skylarks Alauda arvensis have undergone dramatic population declines in many European countries. Evidence exists for deteriorating conditions during the breeding season, but little is known about the situation during the rest of[...]
Article
Flavia Geiger, Auteur ; Arne Hegemann, Auteur ; Maurits Gleichman, Auteur ; Heiner Flinks, Auteur ; Geert R. De Snoo, Auteur ; Sebastian Prinz, Auteur ; B. Irene Tieleman, Auteur ; Frank Berendse, AuteurIn recent decades, Skylark (Alauda arvensis) populations in Europe have declined sharply due to agricultural intensification. Insufficient reproduction rates are one reason. Increased winter mortality may also be important, but studies outside t[...]
