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Article
Paul Dufour, Auteur ; Kevin J. Kardynal, Auteur ; Keith A. Hobson, Auteur ; David Monticelli, Auteur ; Yann Kolbeinsson, Auteur ; Peter Alfrey, Auteur ; Dušan Kerestúr, Auteur ; Thijs Valkenburg, Auteur ; François Fourel, Auteur ; Frédéric Jiguet, AuteurUnderstanding the occurrence of vagrant individuals away from their usual distribution range can shed light on animal navigation systems. In autumn, migratory Nearctic landbirds often occur as far as Western Europe, and while the link between th[...]
Article
Frédéric Jiguet, Auteur ; Paul Dufour, Auteur ; Kevin J. Kardynal, Auteur ; Keith A. Hobson, Auteur ; José Luis Copete, Auteur ; José Luis Arroyo, Auteur ; Raymond W. Lee, Auteur ; Hamid Rguibi-Idrissi, Auteur ; Petr Procházka, AuteurThe Iberian and North African populations of reed warblers have been described recently as a separate taxon, ambiguus, forming a sister clade to the Sahelian subspecies minor of African Reed Warbler Acrocephalus baeticatus. Although the breeding[...]
Article
Jackson W. Kusack, Auteur ; Greg W. Mitchell, Auteur ; Dean R. Evans, Auteur ; Michael D. Cadman, Auteur ; Jenny L. McCune, Auteur ; Keith A. Hobson, AuteurGlobally, grassland and farmland birds have experienced population declines due to habitat loss associated with increasing agricultural land-use intensity. These modified environments can reduce insect availability for aerial insectivorous birds[...]
Article
Fábio José Viana Costa, Auteur ; Keith A. Hobson, Auteur ; Michael B. Wunder, Auteur ; Gabriela Bielefeld Nardoto, AuteurUnderstanding linkages between biotic and abiotic processes operating in highly seasonal environments such as the Savannas in the Neotropics is tremendously challenging but has been aided considerably through biogeochemical markers. Stable isoto[...]
Article
Zheng Han, Auteur ; Hai-Tao Wang, Auteur ; Kevin J. Kardynal, Auteur ; Keith A. Hobson, Auteur ; Wei-Ping Shang, Auteur ; Li-Shi Zhang, Auteur ; Yun-Lei Jiang, Auteur ; Frédéric Jiguet, AuteurThere is sparse and contradictory information concerning the migratory status and non-breeding range of the endangered Jankowski’s Bunting Emberiza jankowskii, precluding the possible development of conservation measures dedicated to protecting [...]
Article
Matthew D. Palumbo, Auteur ; Jackson W. Kusack, Auteur ; Douglas C. Tozer, Auteur ; Shawn W. Meyer, Auteur ; Christian Roy, Auteur ; Keith A. Hobson, AuteurDetermining the source areas of harvested individuals is important for effective conservation and management of migratory game birds. Banding has provided much information about source areas, but obtaining samples of marked individuals represent[...]
Article
Simeon Lisovski, Auteur ; Zoltán Németh, Auteur ; John C. Wingfield, Auteur ; Jesse S. Krause, Auteur ; Keith A. Hobson, Auteur ; Nathaniel E. Seavy, Auteur ; Jennifer Gee, Auteur ; Marilyn Ramenofsky, AuteurWhite-crowned Sparrow (Zonotrichia leucophrys) populations of western North America exhibit dramatic differences in life history strategies including migration behavior. However, individual migration strategies and population-level migratory pat[...]
Article
Cosme López‐Calderón, Auteur ; Keith A. Hobson, Auteur ; Javier Balbontin, Auteur ; María I. Reviriego, Auteur ; Sergio Magallanes, Auteur ; Luz García‐Longoria, Auteur ; Carmen Relinque, Auteur ; Florentino De Lope, Auteur ; Anders P. Møller, Auteur ; Alfonso Marzal, AuteurDans Ibis (161(4) 2019)In migratory species breeding in temperate zones and wintering in tropical areas, the prevalence of blood parasites may be affected by migratory strategies and winter habitat choice. We explored whether African winter habitat was linked to the p[...]
Article
Frédéric Jiguet, Auteur ; Kevin J. Kardynal, Auteur ; Markus Piha, Auteur ; Tuomas Seimola, Auteur ; José Luis Copete, Auteur ; Michel Alexandre Czajkowski, Auteur ; Valery Dombrovski, Auteur ; Ron Efrat, Auteur ; Simonas Minkevicius, Auteur ; Marko Raković, Auteur ; Michał Skierczyǹski, Auteur ; Keith A. Hobson, AuteurBy analysing the deuterium concentration in the scapulars and rectrices (δ2Hf) of breeding and spring migrating Ortolan Buntings (Emberiza hortulana), we found a high correlation attesting that spring body and central rectrices have grown in sim[...]
Article
Matthieu Guillemain, Auteur ; Léo Bacon, Auteur ; Kevin J. Kardynal, Auteur ; Anthony Olivier, Auteur ; Michal Podhrázský, Auteur ; Petr Musil, Auteur ; Keith A. Hobson, AuteurProper delineation of flyways is a prerequisite for adequate management of migratory birds. The implementation of coordinated international management for greylag goose (Anser anser) is currently underway in Europe for the north-west/south-west [...]
Article
Nicholas J. Bayly, Auteur ; Kenneth V. Rosenberg, Auteur ; Camila Gómez, Auteur ; Keith A. Hobson, AuteurThe effect of habitat choice on fuelling behaviour and the organization of migration in birds has rarely been examined, despite the potential impact of widespread anthropogenic transformation of stopover regions. High energetic requirements in m[...]
Article
Quentin R. Hays, Auteur ; Yolanda E. Morbey, Auteur ; Keith A. Hobson, Auteur ; James E. Lyons, Auteur ; Christopher G. Guglielmo, AuteurMigration distance and sex are integral to avian migration strategies, yet these intrinsic factors are understudied with respect to their effects on stopover ecology and behavior. We investigated how individual variation in migration distance an[...]
Article
Yanju Ma, Auteur ; Brian A. Branfireun, Auteur ; Keith A. Hobson, Auteur ; Christopher G. Guglielmo, AuteurMercury (Hg) is a well-known global contaminant that persists in the environment. The organic form, methylmercury (MeHg) has been shown to adversely affect bird immune function, foraging behavior, navigation, and flight ability, which individual[...]
Article
Lucie E. Schmaltz, Auteur ; A. H. Jelle Loonstra, Auteur ; Eddy Wymenga, Auteur ; Keith A. Hobson, Auteur ; Theunis Piersma, AuteurInternational conservation efforts for migratory populations are most effectively based on quantification of the geographical linkages between wintering, staging, and breeding areas, patterns that may not remain constant in times of global chang[...]
Article
Tara L. Imlay, Auteur ; Rolanda J. Steenweg, Auteur ; Belen Garcia-Perez, Auteur ; Keith A. Hobson, Auteur ; Sievert Rohwer, AuteurMolt is energetically demanding and various molt strategies (i.e., molt series, duration, intensity, timing, and location) have evolved to reduce the negative fitness consequences of this process. As such, molt varies considerably among species.[...]
Article
Kevin J. Kardynal, Auteur ; Keith A. Hobson, AuteurUnderstanding non-breeding season movements and identifying wintering areas of different populations of migratory birds is important for establishing patterns of migratory connectivity over the annual cycle. We analyzed archival solar geolocatio[...]
Article
Jaime Resano-Mayor, Auteur ; Ángel Fernández-Martín, Auteur ; Sergio Hernández-Gómez, Auteur ; Ignasi Toranzo, Auteur ; Antonio España, Auteur ; Juan Antonio Gil, Auteur ; Miguel de Gabriel, Auteur ; Isabel Roa-Álvarez, Auteur ; Eliseo Strinella, Auteur ; Keith A. Hobson, Auteur ; Gerald Heckel, Auteur ; Raphaël Arlettaz, AuteurThe population structure and seasonal movements of alpine birds in Europe are still largely unknown. Species living in high mountains now face acute risks of habitat loss, range contractions and local extinction due to current and projected clim[...]
Article
Laura Cárdenas-Ortíz, Auteur ; Nicholas J. Bayly, Auteur ; Gabriel J. Colorado Z., Auteur ; Keith A. Hobson, AuteurCanada Warblers (Cardellina canadensis) are long-distance Neotropical migrants, but little is known about their migratory behavior and ecology. We examined the fall migration of Canada Warblers at two sites, Darién and the Sierra Nevada de Santa[...]
Article
Anthony D. Fox, Auteur ; Keith A. Hobson, Auteur ; Adriaan de Jong, Auteur ; Kevin J. Kardynal, Auteur ; Geoff Koehler, Auteur ; Thomas Heinicke, AuteurFundamental to effective management of migratory waterbird populations is an understanding of their flyway delineation. Taiga Bean Geese Anser fabalis fabalis wintering in NW Denmark, Scotland and England are considered to originate from norther[...]
Article
Juan Arizaga, Auteur ; Steven L. Van Wilgenburg, Auteur ; Daniel Alonso, Auteur ; Jose A. Cortés, Auteur ; Michel Leconte, Auteur ; Hamid Rguibi, Auteur ; Thijs Valkenburg, Auteur ; Pablo Vera, Auteur ; Keith A. Hobson, AuteurCapsule: Stable isotope analyses reveal some degree of migratory connectivity of Bluethroat populations wintering from Iberia to West Africa.Aims: To identify the probable breeding origins of Bluethroats wintering from Iberia to Senegal.Methods:[...]
Article
Juan Arizaga, Auteur ; Steven L. Van Wilgenburg, Auteur ; Daniel Alonso, Auteur ; Jose A. Cortés, Auteur ; Michel Leconte, Auteur ; Hamid Rguibi, Auteur ; Thijs Valkenburg, Auteur ; Pablo Vera, Auteur ; Keith A. Hobson, AuteurCapsule: Stable isotope analyses reveal some degree of migratory connectivity of Bluethroat populations wintering from Iberia to West Africa. Aims: To identify the probable breeding origins of Bluethroats wintering from Iberia to Senegal. Method[...]
Article
Diana Solovyeva, Auteur ; Keith A. Hobson, Auteur ; Natalia Kharitonova, Auteur ; Jason Newton, Auteur ; James W. Fox, Auteur ; Vsevolod Afansyev, Auteur ; Anthony D. Fox, AuteurScaly-sided Mergansers Mergus squamatus breed on freshwater rivers in Far East Russia, Korea, and China, wintering on similar habitat in China and Korea, but information on their post-breeding moulting habitats remains elusive. We combined analy[...]
Article
Alexander L. Bond, Auteur ; Rebecca A. Standen, Auteur ; Antony W. Diamond, Auteur ; Keith A. Hobson, AuteurAssortative mating is an important aspect of mate choice, especially in species where both sexes express ornamentation. Such ornaments could function as signals of individual quality and could result in individuals mating with partners of simila[...]
Article
Graham D. Fairhurst, Auteur ; Alexander L. Bond, Auteur ; Keith A. Hobson, Auteur ; Robert A. Ronconi, AuteurDiet during the non-breeding period influences condition and subsequent reproduction. Physiological mechanisms underlying such carry-over effects are poorly understood but could be clarified by studying physiological responses to variation in di[...]
Article
Graham D. Fairhurst, Auteur ; Alexander L. Bond, Auteur ; Keith A. Hobson, Auteur ; Robert A. Ronconi, AuteurDiet during the non-breeding period influences condition and subsequent reproduction. Physiological mechanisms underlying such carry-over effects are poorly understood but could be clarified by studying physiological responses to variation in di[...]
Article
Laura Cardador, Auteur ; Joan Navarro, Auteur ; Manuela G. Forero, Auteur ; Keith A. Hobson, Auteur ; Santi Mañosa, AuteurVariation in avian migratory behaviour is widespread, not only among species but also within species, and can involve shifts from sedentary at low latitudes to migratory at high latitudes. This leads to a situation whereby non-migratory populati[...]
Article
Anthony D. Fox, Auteur ; Keith A. Hobson, AuteurCapsule: Feather stable isotope analysis suggests summering of so-called \'northern trumpeting\' Bullfinches in Denmark.
Article
Anthony D. Fox, Auteur ; Keith A. Hobson, AuteurCapsule: Feather stable isotope analysis suggests summering of so-called 'northern trumpeting' Bullfinches in Denmark.
Article
Keith A. Hobson, Auteur ; Joseph R. Jehl, AuteurBirds migrating annually to high-latitude breeding grounds may benefit from the transport of endogenous nutrient reserves that ultimately contribute to reproduction. Shorebirds represent a diverse group of Arctic breeders that typically arrive o[...]
Article
Matthieu Guillemain, Auteur ; Steven L. Van Wilgenburg, Auteur ; Pierre Legagneux, Auteur ; Keith A. Hobson, AuteurManagement of migratory game birds must be considered at the flyway scale. Flyway delineation has generally relied on ring recoveries, yet migratory connectivity between breeding and wintering grounds is often difficult to demonstrate due to low[...]
