True navigation in migrating gulls requires intact olfactory nerves



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Wikelski, Martin and Arriero Higueras, Elena and Gagliardo, Anna and Holland, Richard A. and Huttunen, Markku J. and Juvaste, Risto and Mueller, Inge and Tertitski, Grigori and Thorup, Kasper and Wild, Martin and Alanko, Markku and Bairlein, Franz and Cherenkov, Alexander and Cameron, Alison and Flatz, Reinhard and Hannila, Juhani and Hüppop, Ommo and Kangasniemi, Markku and Kranstauber, Bart and Penttinen, Maija-Liisa and Safi, Kamran and Semashko, Vladimir and Schmid, Heidi and Wistbacka, Ralf (2015) True navigation in migrating gulls requires intact olfactory nerves. Scientific reports (5). pp. 1-11. ISSN 2045-2322, ESSN: 2045-2322

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During migratory journeys, birds may become displaced from their normal migratory route. Experimental evidence has shown that adult birds can correct for such displacements and return to their goal. However, the nature of the cues used by migratory birds to perform long distance navigation is still debated. In this experiment we subjected adult lesser black-backed gulls migrating from their Finnish/Russian breeding grounds (from >60°N) to Africa (to sensory manipulation, to determine the sensory systems required for navigation. We translocated birds westward (1080 km) or eastward (885 km) to simulate natural navigational challenges. When translocated westwards and outside their migratory corridor birds with olfactory nerve section kept a clear directional preference (southerly) but were unable to compensate for the displacement, while intact birds and gulls with the ophthalmic branch of the trigeminal nerve sectioned oriented towards their population-specific migratory corridor. Thus, air-borne olfactory information seems to be important for migrating gulls to navigate successfully in some circumstances.

Item Type:Article
Uncontrolled Keywords:Gulls; Animal behaviour; Migration; Evolutionary ecology
Subjects:Medical sciences > Biology > Birds
ID Code:46285
Deposited On:02 Feb 2018 09:59
Last Modified:10 Dec 2018 15:25

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