Cranial shape evolution in adaptive radiations of birds: comparative morphometrics of Darwin's finches and Hawaiian honeycreepers

File Description SizeFormat 
Tokita et al 2017 Phil Trans B.pdfPublished version2.35 MBAdobe PDFDownload
Title: Cranial shape evolution in adaptive radiations of birds: comparative morphometrics of Darwin's finches and Hawaiian honeycreepers
Author(s): Tokita, M
Yano, W
James, HF
Abzhanov, A
Item Type: Journal Article
Abstract: Adaptive radiation is the rapid evolution of morphologically and ecologically diverse species from a single ancestor. The two classic examples of adaptive radiation are Darwin's finches and the Hawaiian honeycreepers, which evolved remarkable levels of adaptive cranial morphological variation. To gain new insights into the nature of their diversification, we performed comparative three-dimensional geometric morphometric analyses based on X-ray microcomputed tomography (µCT) scanning of dried cranial skeletons. We show that cranial shapes in both Hawaiian honeycreepers and Coerebinae (Darwin's finches and their close relatives) are much more diverse than in their respective outgroups, but Hawaiian honeycreepers as a group display the highest diversity and disparity of all other bird groups studied. We also report a significant contribution of allometry to skull shape variation, and distinct patterns of evolutionary change in skull morphology in the two lineages of songbirds that underwent adaptive radiation on oceanic islands. These findings help to better understand the nature of adaptive radiations in general and provide a foundation for future investigations on the developmental and molecular mechanisms underlying diversification of these morphologically distinguished groups of birds. This article is part of the themed issue ‘Evo-devo in the genomics era, and the origins of morphological diversity’.
Publication Date: 19-Dec-2016
Date of Acceptance: 25-Sep-2016
URI: http://hdl.handle.net/10044/1/50396
DOI: https://dx.doi.org/10.1098/rstb.2015.0481
ISSN: 0962-8436
Publisher: Royal Society, The
Journal / Book Title: Philosophical Transactions B: Biological Sciences
Volume: 372
Issue: 1713
Copyright Statement: © 2016 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.
Keywords: Science & Technology
Life Sciences & Biomedicine
Biology
Life Sciences & Biomedicine - Other Topics
adaptive radiation
geometric morphometrics
Darwin's finches
Hawaiian honeycreepers
skull shape
PARTIAL LEAST-SQUARES
BEAK-SHAPE
MORPHOLOGICAL DIVERSIFICATION
BITE FORCE
PHYLOGENETIC-RELATIONSHIPS
CONVERGENT EVOLUTION
SKULL FORM
COVARIATION
ALLOMETRY
PERFORMANCE
Darwin's finches
Hawaiian honeycreepers
adaptive radiation
geometric morphometrics
skull shape
Science & Technology
Life Sciences & Biomedicine
Biology
Life Sciences & Biomedicine - Other Topics
adaptive radiation
geometric morphometrics
Darwin's finches
Hawaiian honeycreepers
skull shape
PARTIAL LEAST-SQUARES
BEAK-SHAPE
MORPHOLOGICAL DIVERSIFICATION
BITE FORCE
PHYLOGENETIC-RELATIONSHIPS
CONVERGENT EVOLUTION
SKULL FORM
COVARIATION
ALLOMETRY
PERFORMANCE
06 Biological Sciences
11 Medical And Health Sciences
Evolutionary Biology
Publication Status: Published
Article Number: ARTN 20150481
Appears in Collections:Faculty of Natural Sciences



Items in Spiral are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons