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Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement

Kishkinev, Dmitry; Chernetsov, Nikita; Heyers, Dominik; Mouritsen, Henrik

Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement Thumbnail


Authors

Nikita Chernetsov

Dominik Heyers

Henrik Mouritsen



Abstract

Several studies have shown that experienced night-migratory songbirds can determine their position, but it has remained a mystery which cues and sensory mechanisms they use, in particular, those used to determine longitude (east-west position). One potential solution would be to use a magnetic map or signpost mechanism like the one documented in sea turtles. Night-migratory songbirds have a magnetic compass in their eyes and a second magnetic sense with unknown biological function involving the ophthalmic branch of the trigeminal nerve (V1). Could V1 be involved in determining east-west position? We displaced 57 Eurasian reed warblers (Acrocephalus scirpaceus) with or without sectioned V1. Sham operated birds corrected their orientation towards the breeding area after displacement like the untreated controls did. In contrast, V1-sectioned birds did not correct for the displacement. They oriented in the same direction after the displacement as they had done at the capture site. Thus, an intact ophthalmic branch of the trigeminal nerve is necessary for detecting the 1,000 km eastward displacement in this night-migratory songbird. Our results suggest that V1 carries map-related information used in a large-scale map or signpost sense that the reed warblers needed to determine their approximate geographical position and/or an east-west coordinate.

Citation

Kishkinev, D., Chernetsov, N., Heyers, D., & Mouritsen, H. (2013). Migratory Reed Warblers Need Intact Trigeminal Nerves to Correct for a 1,000 km Eastward Displacement. PloS one, https://doi.org/10.1371/journal.pone.0065847

Acceptance Date May 4, 2013
Publication Date Jun 26, 2013
Journal PLoS One
Print ISSN 1932-6203
Publisher Public Library of Science
DOI https://doi.org/10.1371/journal.pone.0065847
Keywords animal migration, animals, geography, orientation, songbirds, trigeminal nerve
Publisher URL http://doi.org/10.1371/journal.pone.0065847

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