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1986
Journal article
Parasitoid communities: their size, structure and development
In this chapter the authors first consider the literature on host-parasitoid associations and its limitations. They then review ideas that have been applied to the study of parasitoid communities. The authors develop a system of categorizing parasitoids, based on a fundamental dichotomy in their biology, which allows them to make...Askew, R R ; Shaw, Mark R
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1990
Journal article
Influences of host feeding-niche and foodplant type on generalist and specialist parasitoids
Parasitoids of 185 British herbivorous insect species were classified as being koinobionts (tending to be specialists) or idiobionts (potential generalists) to examine the influences of host feeding-niche and food plant type on the numbers of parasitoid species attacking individual host species. The majority of parasitoid species of exophytic (internally feeding)...Hawkins, B A ; Askew, R R ; Shaw, Mark R
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1992
Journal article
Relations among assemblage size, host specialization and climatic variability in North American parasitoid communities
We classified the parasitoids attacking 628 species of North American herbivorous insects as idiobionts (those that permanently disable their host during attack) or koinobionts (those that permit continued host development following parasitization). Using these physiological attributes of parasitoids as estimators of host range, we tested three hypotheses that might explain...Hawkins, B A ; Shaw, Mark R ; Askew, R R
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1997
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1999
Journal article
Reproductive variability in Pediobius alcaeus (Walker) (Hymenoptera: Eulophidae), a parasitoid of Phyllonorycter (Lepidoptera: Gracillariidae)
Separate, but sympatric, sexual and asexual populations of Pediobius alcaceus ( Walker) (Hymenoptera: Eulophidae), a parasitoid of leaf-mining Phyllonoryter species (Lepidoptera: Gracillariidae), are shown to exist and to be associated with hosts on a different tree species in BritainShaw, Mark R ; Askew, R R
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2001
Journal article
Brachymeria tibialis (Walker, 1834) (Hymenoptera: Chalcididae), a parasitoid of Zygaena Fabricius, 1777, and other Lepidoptera
The primary parasitoids of Zygaena spp. exhibit extreme specialisation to Zygaenidae. However, B. tibialis is a parasitoid of Zygaena, but has a broad lepidopteran host range. The morphology of B. tibialis specimens reared from Zygaena was compared with that of specimens from other host Lepidoptera (Lymantria dispar, Ocnerogyia amanda, Euproctis...Askew, R R ; Shaw, Mark R
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2010
Book chapter
Hymenopterous parasitoids of diptera
Shaw, Mark R ; Askew, R R
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2012
Journal article
Parasitism and migration in southern Palaearctic populations of the painted lady butterfly, Vanessa cardui (Lepidoptera: Nymphalidae)
The painted lady butterfly (Vanessa cardui) (Lepidoptera: Nymphalidae: Nymphalinae) is well known for its seasonal long-distance migrations and for its dramatic population fluctuations between years. Although parasitism has occasionally been noted as an important mortality factor for this butterfly, no comprehensive study has quantified and compared its parasitoid complexes in...