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Pigeons remember visual landmarks after one release and rely upon them more if they are anosmic

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2020

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Gagliardo, Anna
Pollonara, Enrica
Wikelski, Martin

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Animal Behaviour. Elsevier. 2020, 166, pp. 85-94. ISSN 0003-3472. eISSN 1095-8282. Available under: doi: 10.1016/j.anbehav.2020.05.009

Zusammenfassung

Anosmic birds' homing ability is impaired when challenged to navigate over unfamiliar areas. Nevertheless, anosmic pigeons, Columba livia, show unimpaired navigation when released within a familiar area, suggesting that they may rely on familiar visual landmarks for navigation. However, direct evidence for the reliance on familiar visual landmarks during homing in anosmic birds has never been provided. In this study we tracked pigeons subjected singly to one training flight from each of three locations. Prior to their second release from each site, half of the birds were made anosmic while the others were not manipulated. The level of route fidelity was analysed separately for three phases of the homing process, in which familiar visual cues may have different relevance and may be used within different cognitive strategies: (1) ‘Initial decision making’; (2) ‘En route navigation’; (3) ‘Local navigation around home’. Compared to control birds, the anosmic birds flew significantly closer to previously overflown locations in the ‘En route navigation’ phase, while no difference in route fidelity emerged during phases (1) and (3). Our results showed that a single experience is sufficient for pigeons to learn release site features, and that familiar visual landmarks constitute a critical source of navigational information in olfactorily deprived birds during the homing process.

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570 Biowissenschaften, Biologie

Schlagwörter

familiar landmarks, GPS tracking, homing pigeons, olfaction

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ISO 690GAGLIARDO, Anna, Enrica POLLONARA, Martin WIKELSKI, 2020. Pigeons remember visual landmarks after one release and rely upon them more if they are anosmic. In: Animal Behaviour. Elsevier. 2020, 166, pp. 85-94. ISSN 0003-3472. eISSN 1095-8282. Available under: doi: 10.1016/j.anbehav.2020.05.009
BibTex
@article{Gagliardo2020-08Pigeo-50577,
  year={2020},
  doi={10.1016/j.anbehav.2020.05.009},
  title={Pigeons remember visual landmarks after one release and rely upon them more if they are anosmic},
  volume={166},
  issn={0003-3472},
  journal={Animal Behaviour},
  pages={85--94},
  author={Gagliardo, Anna and Pollonara, Enrica and Wikelski, Martin}
}
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    <dcterms:abstract xml:lang="eng">Anosmic birds' homing ability is impaired when challenged to navigate over unfamiliar areas. Nevertheless, anosmic pigeons, Columba livia, show unimpaired navigation when released within a familiar area, suggesting that they may rely on familiar visual landmarks for navigation. However, direct evidence for the reliance on familiar visual landmarks during homing in anosmic birds has never been provided. In this study we tracked pigeons subjected singly to one training flight from each of three locations. Prior to their second release from each site, half of the birds were made anosmic while the others were not manipulated. The level of route fidelity was analysed separately for three phases of the homing process, in which familiar visual cues may have different relevance and may be used within different cognitive strategies: (1) ‘Initial decision making’; (2) ‘En route navigation’; (3) ‘Local navigation around home’. Compared to control birds, the anosmic birds flew significantly closer to previously overflown locations in the ‘En route navigation’ phase, while no difference in route fidelity emerged during phases (1) and (3). Our results showed that a single experience is sufficient for pigeons to learn release site features, and that familiar visual landmarks constitute a critical source of navigational information in olfactorily deprived birds during the homing process.</dcterms:abstract>
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