Genetics and the Evolution of Muellerian Mimicry in Heliconius Butterflies
By hybridizing races of Heliconius melpomene and races of H. erato, it is shown that, as expected from the two-step theory, the races differ at a number of genetic loci, usually unlinked or loosely linked, including at least one mutant of major effect in each case.
Rapid human-induced evolution of insect–host associations
The proportion of insects preferring the novel host has increased, in one case clearly because of genetic changes in the insect population, and this process is now starting to generate insects that refuse to accept their ancestral host, foreshadowing a new problem in conservation biology.
Experimental Confirmation That Inbreeding Depression Increases Extinction Risk in Butterfly Populations
- M. Nieminen, M. Singer, W. Fortelius, K. Schöps, I. Hanski
- Environmental ScienceAmerican Naturalist
- 1 February 2001
This poster presents a probabilistic procedure called a “shots fired” approach that combines a high-resolution 3D image of the genome and a simple 2D model to estimate the number of cells in a population.
Beyond climate change attribution in conservation and ecological research.
It is argued that development of quantitative ecological models for this purpose faces several impediments, particularly the existence of strong, non-additive interactions among different external factors.
HERITABILITY OF OVIPOSITION PREFERENCE AND ITS RELATIONSHIP TO OFFSPRING PERFORMANCE WITHIN A SINGLE INSECT POPULATION
- M. Singer, D. Ng, C. D. Thomas
- Environmental ScienceEvolution; international journal of organic…
- 1 September 1988
Analysis of the data showed that no single factor, neither maternal preference nor the host species on which the offspring were raised, accounted for any significant variation in larval performance, but the effect of the interaction between host species and maternal preference on offspring performance was highly significant.
Complex Components of Habitat Suitability within a Butterfly Colony
- M. Singer
- Environmental ScienceScience
- 7 April 1972
The microdistribution of adult Euphydryas editha changes from year to year, and the colony is subdivided into three populations that fluctuate independently in size, which entails selection pressure favoring the observed low dispersal tendency of adults.
Catastrophic Extinction of Population Sources in a Butterfly Metapopulation
Increasing emphasis is being placed on the large-scale and long-term dynamics of populations. A butterfly (Euphydryas editha) metapopulation that was naturally restricted to rocky outcrops in an area…
Quantification of host preference by manipulation of oviposition behavior in the butterfly Euphydryas editha
- M. Singer
- 1 February 1982
A novel method of measuring host specificity and determining host rank order is described, applied to oviposition behavior of the butterfly Euphydryas editha, where specificity is quantified in terms of the rate at which searching insects become less discriminating.
Sexual Selection for Small Size in Male Butterflies
- M. Singer
- BiologyAmerican Naturalist
- 1 March 1982
It is pointed out that this form of sexual selection in butterflies i likely to result in small male size, the reverse of the effect ofSexual selection in vertebrates.
Phenological asynchrony between herbivorous insects and their hosts: signal of climate change or pre-existing adaptive strategy?
- M. Singer, C. Parmesan
- Environmental SciencePhilosophical Transactions of the Royal Society B…
- 12 October 2010
Evidence is synthesized that synchrony was not the historical condition in two insect–plant interactions involving Edith's checkerspot butterfly, the winter moth, and their host plants, which contributed to extinction of a well-studied metapopulation and to the skewed geographical pattern of population extinctions underlying a northward and upward range shift in this species.