Stress and asymmetry during arrested development of the Australian sheep blowfly

Proceedings. Biological Sciences
J A McKenzie

Abstract

The dieldrin and diazinon resistance systems of the Australian sheep blowfly (Lucilia cuprina) have been used previously to relate stress, departures from bilateral symmetry, developmental stability and relative fitness. These systems are now used to consider stress and asymmetry in a developmental context. Larval to adult development is shown to be significantly impaired after arrested development at 8 degrees C, however the asymmetry score of adults of a given genotype is similar after arrested or continuous development. Selection against dieldrin-resistant and unmodified diazinon-resistant genotypes occurs during arrested development because greater proportions of these genotypes pupae at 8 degrees C than do susceptible or modified diazinon-resistant genotypes. Pre-pupae of all genotypes complete development equally successfully when transferred from 8 degrees C to 27 degrees C. Adults fail to emerge when pupae formed at 8 degrees C undergo this temperature transition. Temperature-shift experiments show the asymmetry score is determined between pre-pupal and pupal stages of the life cycle. This stage occurs at 27 degrees C in arrested and continuously developing cultures providing an explanation for the independence of stres...Continue Reading

References

Aug 1, 1996·Current Opinion in Genetics & Development·M F Palopoli, N H Patel
Oct 1, 1996·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·P BatterhamJ A McKenzie
Jan 22, 1997·Proceedings. Biological Sciences·P Agnew, J C Koella
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Jun 1, 1992·Evolution; International Journal of Organic Evolution·Geoffrey M ClarkePeter Hunt

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Citations

Mar 16, 2000·Trends in Ecology & Evolution·T A BjorkstenA Pomiankowski
Nov 18, 2014·American Journal of Human Biology : the Official Journal of the Human Biology Council·Arodi FarreraRolando González-José

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