Extreme variation in migration strategies between and within wandering albatross populations during their sabbatical year, and their fitness consequences

Scientific Reports
Henri WeimerskirchPatrick Pinet

Abstract

Migratory behavior, routes and zones used during the non-breeding season are assumed to have been selected to maximize fitness, and can lead to genetic differentiation. Yet, here we show that migration strategies differ markedly between and within two genetically similar populations of wandering albatross Diomedea exulans from the Crozet and Kerguelen archipelagos in the Indian Ocean. Wandering albatrosses usually breed biennially if successful, and during the sabbatical year, all birds from Kerguelen migrate to the Pacific Ocean, whereas most from Crozet are sedentary. Instead of taking the shortest routes, which would involve a return against headwinds, migratory birds fly with the westerly winds, requiring detours of 10,000 s km. In total, migrants circumnavigate Antarctica 2 to 3 times, covering more than 120,000 km in a single sabbatical year. Our results indicate strong links between migratory behavior and fitness; all birds from Kerguelen breed biennially, whereas a significant proportion of those from Crozet, especially females, are sedentary and breed in consecutive calendar years. To breed annually, these females temporarily change mate, but return to their original partner in the following year. This extreme variatio...Continue Reading

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Citations

Jul 16, 2016·Behavioral Ecology : Official Journal of the International Society for Behavioral Ecology·Annette L FayetTim Guilford
May 18, 2016·Scientific Reports·Sophie de GrissacHenri Weimerskirch
Oct 11, 2017·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Susanne ÅkessonBarbara Helm
Mar 21, 2018·Movement Ecology·Philip L RichardsonRichard A Phillips
Jan 3, 2019·Ecological Applications : a Publication of the Ecological Society of America·N J Gownaris, P D Boersma
Nov 15, 2017·Royal Society Open Science·Alice CarravieriYves Cherel
Feb 6, 2020·Biological Reviews of the Cambridge Philosophical Society·Anicee J LombalChristopher P Burridge
Sep 26, 2019·Proceedings. Biological Sciences·Daniel C DunnPatrick N Halpin
Sep 15, 2017·Ecology and Evolution·Sophie de GrissacHenri Weimerskirch
Aug 17, 2020·PloS One·Beatriz MartínJuan A Vicente-Vírseda
Mar 27, 2018·Biological Reviews of the Cambridge Philosophical Society·Jane M ReidCalvin Dytham
Oct 21, 2020·Scientific Reports·Jon MorantPascual López-López
Jun 11, 2021·Proceedings of the National Academy of Sciences of the United States of America·Helena P BairdSteven L Chown
Jul 8, 2021·Journal of the Royal Society, Interface·Svana RogallaMatthew D Shawkey

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