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Full-Text Articles in Life Sciences
Phenotypic Constraints At The Top Of The World: An Arctic Songbird Faces The Cumulative Cost Of Maintaining A Winter-Like Phenotype During Breeding, Audrey Le Pogam, Ryan S. O’Connor, Oliver P. Love, Kevin G. Young, Justine Drolet, Lyette Régimbald, Gabrielle Roy, Francis Robitaille, Dominique Berteaux, Andrew Tam, François Vézina
Phenotypic Constraints At The Top Of The World: An Arctic Songbird Faces The Cumulative Cost Of Maintaining A Winter-Like Phenotype During Breeding, Audrey Le Pogam, Ryan S. O’Connor, Oliver P. Love, Kevin G. Young, Justine Drolet, Lyette Régimbald, Gabrielle Roy, Francis Robitaille, Dominique Berteaux, Andrew Tam, François Vézina
Integrative Biology Publications
Among birds, several body composition traits typically decrease in size or mass during breeding likely as a result of competing demands during this critical life history stage. However, a recent outdoor captive study in an Arctic-breeding cold-specialist songbird (snow buntings – Plectrophenax nivalis) demonstrated that these birds maintain winter cold acclimatization during the spring and summer, despite facing summer temperatures much warmer than on their Arctic breeding grounds. This suggests that buntings may face a cumulative physiological cost during breeding: having to support a winter phenotype while also upregulating additional traits for reproduction. The current study aimed to test this …
Timing Of Breeding Site Availability Across The North-American Arctic Partly Determines Spring Migration Schedule In A Long-Distance Neotropical Migrant, Jean François Lamarre, Gilles Gauthier, Richard B. Lanctot, Sarah T. Saalfeld, Oliver P. Love, Eric Reed, Oscar W. Johnson, Joe Liebezeit, Rebecca Mcguire, Mike Russell, Erica Nol, Laura Koloski, Felicia Sanders, Laura Mckinnon, Paul A. Smith, Scott A. Flemming, Nicolas Lecomte, Marie Andrée Giroux
Timing Of Breeding Site Availability Across The North-American Arctic Partly Determines Spring Migration Schedule In A Long-Distance Neotropical Migrant, Jean François Lamarre, Gilles Gauthier, Richard B. Lanctot, Sarah T. Saalfeld, Oliver P. Love, Eric Reed, Oscar W. Johnson, Joe Liebezeit, Rebecca Mcguire, Mike Russell, Erica Nol, Laura Koloski, Felicia Sanders, Laura Mckinnon, Paul A. Smith, Scott A. Flemming, Nicolas Lecomte, Marie Andrée Giroux
Great Lakes Institute for Environmental Research Publications
Long-distance migrants are under strong selection to arrive on their breeding grounds at a time that maximizes fitness. Many arctic birds start nesting shortly after snow recedes from their breeding sites and timing of snowmelt can vary substantially over the breeding range of widespread species. We tested the hypothesis that migration schedules of individuals co-occurring at the same non-breeding areas are adapted to average local environmental conditions encountered at their specific and distant Arctic breeding locations. We predicted that timing of breeding site availability (measured here as the average snow-free date) should explain individual variation in departure time from shared …