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Grey seals use anthropogenic signals from acoustic tags to locate fish : evidence from a simulated foraging task

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Janik_2014_ProcB_GreySeals.pdf (777.6Kb)
Date
07/01/2015
Author
Stansbury, Amanda
Götz, Thomas
Deecke, Volker Bernt
Janik, Vincent M.
Keywords
Anthropogenic noise
Acoustic fish tags
Dinner bell effect
Chemosensory cues
Pinnipeds
QH301 Biology
QL Zoology
NDAS
BDC
R2C
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Abstract
Anthropogenic noise can have negative effects on animal behaviour and physiology. However, noise is often introduced systematically and potentially provides information for navigation or prey detection. Here, we show that grey seals (Halichoerus grypus) learn to use sounds from acoustic fish tags as an indicator of food location. In 20 randomized trials each, 10 grey seals individually explored 20 foraging boxes, with one box containing a tagged fish, one containing an untagged fish and all other boxes being empty. The tagged box was found after significantly fewer non-tag box visits across trials, and seals revisited boxes containing the tag more often than any other box. The time and number of boxes needed to find both fish decreased significantly throughout consecutive trials. Two additional controls were conducted to investigate the role of the acoustic signal: (i) tags were placed in one box, with no fish present in any boxes and (ii) additional pieces of fish, inaccessible to the seal, were placed in the previously empty 18 boxes, making possible alternative chemosensory cues less reliable. During these controls, the acoustically tagged box was generally found significantly faster than the control box. Our results show that animals learn to use information provided by anthropogenic signals to enhance foraging success.
Citation
Stansbury , A , Götz , T , Deecke , V B & Janik , V M 2015 , ' Grey seals use anthropogenic signals from acoustic tags to locate fish : evidence from a simulated foraging task ' , Proceedings of the Royal Society B: Biological Sciences , vol. 282 , no. 1798 , 20141595 . https://doi.org/10.1098/rspb.2014.1595
Publication
Proceedings of the Royal Society B: Biological Sciences
Status
Peer reviewed
DOI
https://doi.org/10.1098/rspb.2014.1595
ISSN
0962-8452
Type
Journal article
Rights
© 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
Description
This study was conducted under Home Office licence number 60/33030. This study was funded by the Natural Environment Research Council of the UK, grant no. NE/I024682/1.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5800

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