Low survival of strongly footed pheasants may explain constraints on lateralization

Whiteside, Mark A, Bess, Mackenzie M, Frasnelli, Elisa , Beardsworth, Christine E, Langley, Ellis J. G., van Horik, Jayden O. and Madden, Joah R. (2018) Low survival of strongly footed pheasants may explain constraints on lateralization. Scientific Reports, 8 (13791). ISSN 2045-2322

Full content URL: https://doi.org/10.1038/s41598-018-32066-1

Low survival of strongly footed pheasants may explain constraints on lateralization
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Brain lateralization is considered adaptive because it leads to behavioral biases and specializations that bring fitness benefits. Across species, strongly lateralized individuals perform better in specific behaviors likely to improve survival. What constrains continued exaggerated lateralization? We measured survival of pheasants, finding that individuals with stronger bias in their footedness had shorter life expectancies compared to individuals with weak biases. Consequently, weak, or no footedness provided the highest fitness benefits. If, as suggested, footedness is indicative of more general brain lateralization, this could explain why continued brain lateralization is constrained even though it may improve performance in specific behaviors.

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Keywords:lateralization, fitness, survival, strength of bias, footedness
Subjects:C Biological Sciences > C100 Biology
C Biological Sciences > C180 Ecology
C Biological Sciences > C300 Zoology
Divisions:College of Science > School of Life Sciences
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ID Code:33316
Deposited On:09 Oct 2018 13:28

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