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Research | Open Access

Behavioral plasticity is not significantly associated with head volume in a wild Chestnut Thrush (Turdus rubrocanus) population

Qingshan Zhao1,2, Yuehua Sun1( )
Key Laboratory of Animal Ecology and Conservation Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
University of the Chinese Academy of Sciences, Beijing 100049, China
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Abstract

Background

The drivers of intraspecific variation in behavioral plasticity are poorly known. A widely held hypothesis is that brain size is positively correlated with behavioral plasticity.

Methods

A total of 71 Chestnut Thrushes (Turdus rubrocanus) were caught in the wild population. We quantified behavior plasticity of activity of individuals measured in the same cage across two contexts (common and with a novel object stimulation), using a random regression analysis. We then investigated whether head volume (a proxy for brain size) was associated with behavioral plasticity in activity level using Spearman rank-order correlation.

Results

We found no significant evidence that activity plasticity was associated with relative head volume. There was no sex difference in head volume or in variance in head volume.

Conclusions

We speculate that the absence of an association between brain volume and activity behavior plasticity may result from the inaccuracy of using external skull measurements to estimate brain size, or from a particular part of the brain being responsible for plasticity in activity level.

Keywords

ActivityBehavioral plasticityChestnut ThrushHead volume

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Avian Research
Volume 7 Issue 1,
January 2016
Article number: 12
DOI: 10.1186/s40657-016-0048-z
Cite this article:
Zhao Q, Sun Y. Behavioral plasticity is not significantly associated with head volume in a wild Chestnut Thrush (Turdus rubrocanus) population. Avian Research, 2016, 7(1): 12. https://doi.org/10.1186/s40657-016-0048-z

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Received: 26 April 2016
Accepted: 27 July 2016
Published: 09 August 2016
© 2016 The Author(s).

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