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https://hdl.handle.net/2440/65535
Type: | Journal article |
Title: | Changes in egg size of exotic passerines introduced to New Zealand |
Author: | Cassey, P. Blackburn, T. Evans, K. |
Citation: | Notornis, 2005; 52(4):243-246 |
Publisher: | Ornithological Society of New Zealand Inc |
Issue Date: | 2005 |
ISSN: | 0029-4470 |
Statement of Responsibility: | Phillip Cassey, Tim M. Blackburn and Karl L. Evans |
Abstract: | Bird species introduced to New Zealand from high northern latitudes are expected to change their breeding behaviour to conform to well-known geographic gradients in avian reproductive parameters. Here, we demonstrate reductions in average egg size and clutch volume for eight species of exotic passerine originating in the UK, and show that the magnitudes of these reductions appear to trade-off against reductions in annual variation in clutch size. Possible reasons for the trade-off are discussed. |
Keywords: | Ashmole's hypothesis clutch volume egg size introduced birds reproductive effort |
Rights: | © Ornithological Society of New Zealand |
Appears in Collections: | Aurora harvest 5 Earth and Environmental Sciences publications Environment Institute Leaders publications |
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