Rapid adjustments of migration and life history in hemisphere-switching cliff swallows
| Autor: | Fabricio C. Gorleri, Keith A. Hobson, David W. Winkler, Teresa M. Pegan, Eli S. Bridge, Sergio A. Salvador, Juan Ignacio Areta, Eric R. Gulson-Castillo, Facundo Ariel Gandoy |
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| Rok vydání: | 2021 |
| Předmět: |
Male
0301 basic medicine Range (biology) Population Bird migration Molting Biology General Biochemistry Genetics and Molecular Biology 03 medical and health sciences 0302 clinical medicine Petrochelidon Animals Colonization education education.field_of_study Phenotypic plasticity Phenology Ecology Central America Feathers South America 15. Life on land biology.organism_classification Breed 030104 developmental biology Swallows North America Animal Migration Female Seasons General Agricultural and Biological Sciences 030217 neurology & neurosurgery |
| Zdroj: | Current Biology. 31:2914-2919.e2 |
| ISSN: | 0960-9822 |
| DOI: | 10.1016/j.cub.2021.04.019 |
| Popis: | Summary Many aspects of bird migration are necessarily innate. 1 However, the extent of deterministic genetic control, environmental influence, and individual decision making in the control of migration remains unclear. 2 , 3 , 4 , 5 , 6 , 7 , 8 Globally, few cases of rapid and dramatic life-history changes resulting in novel migration strategies are known. An example is latitudinal trans-hemispheric breeding colonization, whereby a subpopulation suddenly begins breeding on its non-breeding range. 9 , 10 , 11 , 12 , 13 These life-history reversals demand concomitant changes in the timing of migration, feather molt, and breeding if the population is to remain viable. 13 Cliff swallows, Petrochelidon pyrrhonota, are long-distance migrants that breed in North America and spend the non-breeding season mostly in South America. 14 However, in 2015, a small population switched hemispheres by breeding successfully in Argentina, 9 over 8,000 km from the nearest potential source, after presumably failed attempts. 15 , 16 This provided a unique chance to characterize the early mechanisms of change in migratory behavior and phenology and to assess the possibility of double breeding. We tracked cliff swallows with geolocators following their second and fourth breeding seasons in Argentina, documenting inverted seasonality, three new migratory patterns and non-breeding areas (North America, Mesoamerica, and South America), and a shift of molt phenology by approximately 6 months, all possibly arising within a single generation. These birds did not practice migratory double breeding, although some spent the boreal summer in the traditional breeding range. Our data show that fundamental phenological changes occurred very rapidly during colonization and that phenotypic plasticity can underlie profound changes in the life histories of migratory birds. |
| Databáze: | OpenAIRE |
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