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Variable Selection and the Coexistence of Multiple mimetic forms of the Butterfly Heliconius numata
Polymorphism in aposematic animals and coexistence of multiple mimicry rings within a habitat are not predicted by classical Müllerian mimicry. The butterfly Heliconius numata Cramer (Lepidoptera:… Expand
Hybridisation and climate change: brown argus butterflies in Britain (Polyommatus subgenus Aricia)
Abstract. 1. Distribution changes brought about by climate change are likely to alter levels of hybridisation between related taxa, and may threaten some species.
Variable selection and the coexistence of multiple mimetic forms of the butter ̄y Heliconius numata
Polymorphism in aposematic animals and coexistence of multiple mimicry rings within a habitat are not predicted by classical MuÈ llerian mimicry. The butter ̄y Heliconius numata Cramer (Lepidoptera:… Expand
Preliminary observations on the population development of anystid and free-living mesostigmatic mites in a cereal field in Southern England
The effect of manipulating cereal aphid population development, by either adding aphids or spraying with an aphid-specific insecticide, on the predatory mite fauna was investigated. Populations of… Expand
Genetic variability within and between English populations of the damson-hop aphid, Phorodon humuli (Hemiptera: Aphididae), with special reference to esterases associated with insecticide resistance
The damson‐hop aphid, Phorodon humuli (Schrank), is a serious pest of hops in England. It is holocyclic (with obligatory sexual phase) and host alternating. From suction trap data, P. humuli aerial… Expand
Genetic structure of fragmented November moth (Lepidoptera: Geometridae) populations in farmland
Habitats are now becoming increasingly fragmented throughout the world due to intense cultivation. As a consequence, populations of some animals with low mobility have become isolated, thus… Expand
Estimating rates of gene flow in endemic butterfly races: the effect of metapopulation dynamics.
The effect of metapopulation processes on the spatial scaleof adaptation across an environmental gradient
We show that the butterfly Aricia agestis (Lycaenidae) is adapted to its thermal environment in via integer changes in the numbers of generations per year (voltinism): it has two generations per… Expand
The distribution and genetic structure of farmland moth communities
Population genetic structure during aestivation in the sycamore aphid Drepanosiphum platanoidis (Hemiptera: Drepanosiphidae)
Cellulose acetate electrophoresis was used to investigate genetic variation at 15 enzyme loci in aestivating populations of the sycamore aphid, Drepanosiphum platanoidis (Schrank) (Hemiptera:… Expand