Journal ArticleDOI
The ontogeny and cost of migration in Drosophila subobscura Collin
C. Inglesfield,Michael Begon +1 more
TLDR
The ontogeny of migratory potential of male and female Drosophila subobscura has been quantified using tethered flight in the laboratory and there is an intervening peak in the potential of males, which may result from an increased rejection-rate by inseminated females.Abstract:
The ontogeny of migratory potential of male and female Drosophila subobscura has been quantified using tethered flight in the laboratory. In both sexes there is an increase in the few days immediately after eclosion, and a decline before the flies cease reproductive activity. There is an intervening peak in the potential of males, which may result from an increased rejection-rate by inseminated females. The migratory potential generally appears greater than that usually utilized in the field. Such extended migration extracts a significant cost from female flies in terms of reduced fecundity.read more
Citations
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Journal ArticleDOI
The evolution of wing dimorphism in insects
TL;DR: A review of the literature indicates that the presence or absence of wings may be controlled by a single locus, two‐allele genetic system or a polygenic system, and both types of inheritance can be subsumed within a general threshold model.
Journal ArticleDOI
The evolution of flightlessness in insects
TL;DR: It is hypothesized that larval migration by ballooning, the large—scale spatiotemporal stability of woodlands, and the small—scale unpredictability of spring bud burst are primary factors favoring the evolution of flightlessness in these Lepidoptera.
Journal ArticleDOI
Habitat Persistence and the Evolution of Wing Dimorphism in Insects
TL;DR: Analysis of a simulation model of an environment composed of discrete patches that persist for a fixed period and a generalized life-history pattern shows that a dominant brachyptery allele can readily spread in a monomorphically macropterous population and that at equilibrium genetic variability is maintained.
Journal ArticleDOI
Trade-offs and constraints in plant-herbivore defense theory: a life-history perspective
TL;DR: It is argued that trade-offs, such as those between defense and growth, may be better understood by incorporating insights from life-history studies, because these lie at the heart of current defense theory.
Journal ArticleDOI
Thermal evolution of egg size in drosophila melanogaster.
TL;DR: It is not clear which life‐history traits are direct targets of thermal selection and which are showing correlated responses, and disentangling these is a task for the future.
References
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Journal ArticleDOI
Genetics of life history in drosophila melanogaster. ii. exploratory selection experiments
TL;DR: Natural selection for late-age fitness components increased late fecundity, female longevity, and the duration of female reproduction, while early fecundities and mean egg-laying rate decreased.
Journal ArticleDOI
The utilization of reserve substances in Drosophila during flight.
TL;DR: It is suggested that the deposits of glycogen in the haltere knob may serve to increase the inertia of the haltedere and so its efficiency as a gyroscopic sense organ is increased.
Journal ArticleDOI
Fertility, mating behaviour and sexual selection inDrosophila Subobscura
TL;DR: Inbred males are inferior both in the quality and quantity of sperm produced after mating to outbred males.
Journal ArticleDOI
Group selection and the evolution of dispersal.
TL;DR: A balance between dispersal and other desirable features that would be reduced by an optimization of dispersal is used, to equalize the probability of survival for individuals that do and do not disperse.
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