Asymmetric visual input and route recapitulation in homing pigeons

Proceedings of the Royal Society B: Biological Sciences - Tập 282 Số 1816 - Trang 20151957 - 2015
Antone Martinho1, Dora Biro1, Tim Guilford1, Anna Gagliardo2, Alex Kacelnik1
1Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK
2Department of Biology, University of Pisa, Via Volta 6, Pisa 56126, Italy

Tóm tắt

Pigeons (Columba livia) display reliable homing behaviour, but their homing routes from familiar release points are individually idiosyncratic and tightly recapitulated, suggesting that learning plays a role in route establishment. In light of the fact that routes are learned, and that both ascending and descending visual pathways share visual inputs from each eye asymmetrically to the brain hemispheres, we investigated how information from each eye contributes to route establishment, and how information input is shared between left and right neural systems. Using on-board global positioning system loggers, we tested 12 pigeons' route fidelity when switching from learning a route with one eye to homing with the other, and back, in an A-B-A design. Two groups of birds, trained first with the left or first with the right eye, formed new idiosyncratic routes after switching eyes, but those that flew first with the left eye formed these routes nearer to their original routes. This confirms that vision plays a major role in homing from familiar sites and exposes a behavioural consequence of neuroanatomical asymmetry whose ontogeny is better understood than its functional significance.

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Proceedings of the Royal Society B: Biological Sciences

Tập 282 Số 1816

20151957

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