You are not logged in.

The evolution of the avian bill as a thermoregulatory organ.

Tattersall, Glenn J, Arnaout, Bassel and Symonds, Matthew 2016, The evolution of the avian bill as a thermoregulatory organ., Biological reviews, In Press, pp. 1-27, doi: 10.1111/brv.12299.

Attached Files
Name Description MIMEType Size Downloads

Title The evolution of the avian bill as a thermoregulatory organ.
Author(s) Tattersall, Glenn J
Arnaout, Bassel
Symonds, MatthewORCID iD for Symonds, Matthew
Journal name Biological reviews
Season In Press
Start page 1
End page 27
Total pages 27
Publisher Wiley
Place of publication Chichester, Eng.
Publication date 2016-10-07
ISSN 1469-185X
Keyword(s) Allen's Rule
character traits
developmental plasticity
phenotypic flexibility
Summary The avian bill is a textbook example of how evolution shapes morphology in response to changing environments. Bills of seed-specialist finches in particular have been the focus of intense study demonstrating how climatic fluctuations acting on food availability drive bill size and shape. The avian bill also plays an important but under-appreciated role in body temperature regulation, and therefore in energetics. Birds are endothermic and rely on numerous mechanisms for balancing internal heat production with biophysical constraints of the environment. The bill is highly vascularised and heat exchange with the environment can vary substantially, ranging from around 2% to as high as 400% of basal heat production in certain species. This heat exchange may impact how birds respond to heat stress, substitute for evaporative water loss at elevated temperatures or environments of altered water availability, or be an energetic liability at low environmental temperatures. As a result, in numerous taxa, there is evidence for a positive association between bill size and environmental temperatures, both within and among species. Therefore, bill size is both developmentally flexible and evolutionarily adaptive in response to temperature. Understanding the evolution of variation in bill size however, requires explanations of all potential mechanisms. The purpose of this review, therefore, is to promote a greater understanding of the role of temperature on shaping bill size over spatial gradients as well as developmental, seasonal, and evolutionary timescales.
Language eng
DOI 10.1111/brv.12299
Field of Research 060399 Evolutionary Biology not elsewhere classified
Socio Economic Objective 970106 Expanding Knowledge in the Biological Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Wiley
Persistent URL

Connect to link resolver
Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved.

Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in TR Web of Science
Scopus Citation Count Cited 1 times in Scopus
Google Scholar Search Google Scholar
Access Statistics: 16 Abstract Views, 1 File Downloads  -  Detailed Statistics
Created: Mon, 28 Nov 2016, 14:52:24 EST

Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact