The Open UniversitySkip to content

Phenotypic changes and reduced genetic diversity have accompanied the rapid decline of the garden tiger moth (Arctia caja) in the U.K

Anderson, Sarah J.; Conrad, Kelvin F.; Gillman, Mike P.; Woiwod, Ian P. and Freeland, Joanna R. (2008). Phenotypic changes and reduced genetic diversity have accompanied the rapid decline of the garden tiger moth (Arctia caja) in the U.K. Ecological Entomology, 33(5) pp. 638–645.

DOI (Digital Object Identifier) Link:
Google Scholar: Look up in Google Scholar


1. Previous studies have quantified the recent decline of numerous Lepidopteran species in the U.K., including the garden tiger moth (Arctia caja), in which abundance has decreased by 85% over the past 30 years. At the same time that overall numbers have been falling, the distribution of abundance of this species has been moving northwards. In this study, morphological and genetic data were used to investigate the possibility that these changes in abundance and distribution have been accompanied by microevolutionary changes. 2. A comparison of wing size and shape in current and historical moth samples revealed that wing shape has altered significantly over the past century, resulting in longer, narrower hindwings and narrower forewings for a given forewing length. Habitat fragmentation and increased suitability of northerly sites provide a plausible explanation for the selection of increasingly dispersive individuals. 3. Mitochondrial DNA revealed no phylogeographic structuring either before or after the population decline. However, a comparison of mtDNA haplotypes from current and museum specimens indicated that the recent population decline across the U.K. has been accompanied by a significant loss of genetic diversity. 4. The changes in wing shape suggest recent adaptation to environmental change, whereas a loss of genetic diversity may limit the ability of garden tiger moths to adapt to future environmental change.

Item Type: Journal Article
Copyright Holders: 2008 The Authors
ISSN: 0307-6946
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetBBSRC (Biotechnology and Biological Sciences Research Council)
Not SetNot SetNERC (Natural Environment Research Council)
Keywords: dispersal; genetic diversity; Lepidoptera; microevolution; mitochondrial DNA; wing morphology
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Science > Environment, Earth and Ecosystems
Interdisciplinary Research Centre: OpenSpace Research Centre (OSRC)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 15757
Depositing User: Colin Smith
Date Deposited: 14 Apr 2009 21:23
Last Modified: 15 Jan 2016 11:13
Share this page:


Scopus Citations

▼ Automated document suggestions from open access sources

Actions (login may be required)

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340