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Documents disponibles écrits par cet auteur (10)
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Article
Than J. Boves, Auteur ; Jinelle H. Sperry, Auteur ; Kristin Comolli, Auteur ; Patrick J. Weatherhead, AuteurThe cost of brood parasitism favors the evolution of host behaviors that reduce the risk or expense of being parasitized. Endangered Black-capped Vireos (Vireo atricapilla) have likely coexisted with brood-parasitic Brown-headed Cowbirds (Moloth[...]
Article
Jeffrey R. Row, Auteur ; Gabriel Blouin-Demers, Auteur ; Patrick J. Weatherhead, AuteurRoads negatively affect animal populations by presenting barriers to movement and gene flow and by causing mortality. We investigated the impact of a secondary road on a population of black ratsnakes (Elaphe obsoleta) in Ontario, Canada by radio[...]
Article
J. Dylan Maddox, Auteur ; Patrick J. Weatherhead, AuteurMultiple factors potentially affect nestling survival and maternal reproductive success. However, little is known about the relative importance of different factors when operating simultaneously or whether the same factors are important for nest[...]
Article
John A. Dassow, Auteur ; Michael W. Eichholz, Auteur ; Joshua D. Stafford, Auteur ; Patrick J. Weatherhead, AuteurParent birds should take greater risks defending nests that have a higher probability of success. Given high rates of mammalian nest predation, therefore, parents should risk more for nests in areas with a lower risk of mammalian predation. We t[...]
Article
Patrick J. Weatherhead, Auteur ; Katherine E. Muma, Auteur ; J. Dylan Maddox, Auteur ; Jenny M. Knox, Auteur ; Kevin W. Dufour, AuteurPast studies of offspring sex ratios in birds have often relied on sexually size dimorphic species where nestling sex could be determined based on weight at a given age. DNA-based sexing techniques allow us to assess the accuracy of those techni[...]
Article
Jinelle H. Sperry, Auteur ; Rebecca G. Peak, Auteur ; David A. Cimprich, Auteur ; Patrick J. Weatherhead, AuteurVariation in predator behavior has been proposed, but not tested, as a mechanism producing seasonal declines in avian nest success. We test this hypothesis by documenting seasonal activity of Texas ratsnakes Elaphe obsoleta and nest failure of e[...]
Article
Jinelle H. Sperry, Auteur ; Douglas G. Barron, Auteur ; Patrick J. Weatherhead, AuteurSeasonal variation in nest success is well documented for many bird species. Predator behavior has been suggested as a mechanism behind these seasonal patterns, but this hypothesis has received little attention. Here we test the hypothesis that [...]
Article
Brett A. DeGregorio, Auteur ; Scott J. Chiavacci, Auteur ; Patrick J. Weatherhead, Auteur ; John D. Willson, Auteur ; Thomas J. Benson, Auteur ; Jinelle H. Sperry, AuteurPredation is the leading cause of nest failure for most birds. Thus, for ornithologists interested in the causes and consequences of variation in nest success, knowing the identity and understanding the behavior of dominant nest predators is lik[...]
Article
Daniel Steven Harvey, Auteur ; Patrick J. Weatherhead, AuteurUnderstanding the process animals follow to select habitat, rather than just documenting the habitat they use, will improve our ability to predict how the animals use habitat in other locations and how they will respond to changes in habitat. An[...]
Article
J. Dylan Maddox, Auteur ; Rachel M. Bowden, Auteur ; Patrick J. Weatherhead, AuteurMaternal effects are typically thought to enhance rather than reduce offspring performance, but asynchronous hatching (ASH) in birds typically produces a size hierarchy within a clutch that frequently reduces the growth and survival of nestlings[...]
