M
Michael S. Johnson
Researcher at University of Western Australia
Publications - 131
Citations - 5151
Michael S. Johnson is an academic researcher from University of Western Australia. The author has contributed to research in topics: Population & Genetic divergence. The author has an hindex of 38, co-authored 127 publications receiving 4985 citations. Previous affiliations of Michael S. Johnson include Yale University & University of Leeds.
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Journal Article
Antiretroviral postexposure prophylaxis after sexual, injection-drug use, or other nonoccupational exposure to HIV in the United States: recommendations from the U.S. Department of Health and Human Services.
Dawn K. Smith,Lisa A. Grohskopf,Roberta J. Black,Judith D. Auerbach,Fulvia Veronese,Kimberly A Struble,Laura W. Cheever,Michael S. Johnson,Lynn A. Paxton,Ida M Onorato,Alan E. Greenberg +10 more
TL;DR: Recommendations on the provision of antiretroviral drugs to prevent HIV infection after unanticipated sexual or injection-drug--use exposure and the use of nPEP are made.
Journal ArticleDOI
Chaotic genetic patchiness in an intertidal limpet, Siphonaria sp.
Michael S. Johnson,Robert Black +1 more
TL;DR: Variation of 4 polymorphic enzymes was studied for 2 yr in an undescribed species of Siphonaria, a pulmonate limpet, from a rocky shore at Rottnest Island, Western Australia, leading to the proposal that planktonic dispersal, although causing uniformity on a large scale, can give rise to fine-scale genetic patchiness.
Journal ArticleDOI
Pattern beneath the chaos: the effect of recruitment on genetic patchiness in an intertidal limpet.
Michael S. Johnson,Robert Black +1 more
TL;DR: Gene exchange among widely separated areas characterizes many marine organisms with planktonic dispersal; the essential feature of such dispersal is that recruits to local populations come from somewhere else, and changes in the genetic composition of adults reflect single-generation effects of selection and recruitment.
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Congruence Between Morphological and Allozyme Data in Evolutionary Inference and Character Evolution
TL;DR: Cladistical rather than phenetic methods are required for the analysis of character evolution, and the ease of obtaining sufficient information, rather than presumed inherent differences between characters, should determine which characters are used for evolutionary taxonomic inference.
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Effects of recruitment on genetic patchiness in the urchin Echinometra mathaei in Western Australia
TL;DR: It is found that the total variance in allelic frequency among three populations separated by approximately 4 km at Rottnest Island, Western Australia is as large as that among five additional samples collected over a distance of 1 300 km along the Western Australian coast.