The evolution of colouration in parrots (Psittaciformes)

Mitchell, Charlotte (2019) The evolution of colouration in parrots (Psittaciformes). MRes thesis, University of Lincoln.

The evolution of colouration in parrots (Psittaciformes)
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Item Type:Thesis (MRes)
Item Status:Live Archive


The aim of this study is to investigate the colouration of parrots in an evolutionary context utilising novel metrics for the quantification of colour pattern. Previously, the study of animal colouration has been limited by its inability to produce statistically robust and objective measures of pattern. We propose the use of image correlograms, a method adapted from the field of computer science where it is used in the indexing and retrieval of images for search engines, in order to evaluate the whole colour pattern of parrot species as taken from field guides. This is the largest study of parrot colouration in terms of number of species included in the study (403) and includes the ancestral reconstruction of the original parrot’s colouration as well as how colouration has changed over time. Finally, the information gained on the parrots’ colouration is applied to an issue of pressing concern for those studying the conservation of parrots, how differences in colour pattern relates to conservation status.

Keywords:conservation, evolutionary biology, psittacofulvins
Subjects:C Biological Sciences > C180 Ecology
C Biological Sciences > C182 Evolution
C Biological Sciences > C181 Biodiversity
Divisions:College of Science > School of Life Sciences
ID Code:39309
Deposited On:23 Dec 2019 16:19

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