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  Ghrelin affects stopover decisions and food intake in a long-distance migrant

Goymann, W., Lupi, S., Kaiya, H., Cardinale, M., & Fusani, L. (2017). Ghrelin affects stopover decisions and food intake in a long-distance migrant. Proceedings of the National Academy of Sciences of the United States of America, 114(8), 1946-1951. doi:10.1073/pnas.1619565114.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-3BBC-A Version Permalink: http://hdl.handle.net/21.11116/0000-0003-2D22-5
Genre: Journal Article

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 Creators:
Goymann, Wolfgang1, Author              
Lupi, Sara, Author
Kaiya, Hiroyuki, Author
Cardinale, Massimiliano, Author
Fusani, Leonida2, Author              
Affiliations:
1Abteilung Gahr, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society, ou_2149688              
2Universität Wien, ou_persistent22              

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 Abstract: Billions of birds migrate long distances to either reach breeding areas or to spend the winter at more benign places. On migration, most passerines frequently stop over to rest and replenish their fuel reserves. To date, we know little regarding how they decide that they are ready to continue their journey. What physiological signals tell a bird’s brain that its fuel reserves are sufficient to resume migration? A network of hormones regulates food intake and body mass in vertebrates, including the recently discovered peptide hormone, ghrelin. Here, we show that ghrelin reflects body condition and influences migratory behavior of wild birds. We measured ghrelin levels of wild garden warblers (Sylvia borin) captured at a stopover site. Further, we manipulated blood concentrations of ghrelin to test its effects on food intake and migratory restlessness. We found that acylated ghrelin concentrations of garden warblers with larger fat scores were higher than those of birds without fat stores. Further, injections of unacylated ghrelin decreased food intake and increased migratory restlessness. These results represent experimental evidence that appetite-regulating hormones control migratory behavior. Our study lays a milestone in migration physiology because it provides the missing link between ecologically dependent factors such as condition and timing of migration. In addition, it offers insights in the regulation of the hormonal system controlling food intake and energy stores in vertebrates, whose disruption causes eating disorders and obesity.

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 Dates: 2017-02-21
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1073/pnas.1619565114
Other: Immediate Open Access
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Title: Proceedings of the National Academy of Sciences of the United States of America
  Other : Proceedings of the National Academy of Sciences of the USA
  Other : Proc. Acad. Sci. USA
  Other : Proc. Acad. Sci. U.S.A.
  Abbreviation : PNAS
Source Genre: Journal
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Publ. Info: Washington, D.C. : National Academy of Sciences
Pages: - Volume / Issue: 114 (8) Sequence Number: - Start / End Page: 1946 - 1951 Identifier: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230