Search results for: M. Craddock

Items from 1 to 9 out of 9 results

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Ultrastructural variation and adaptive evolution of the ovipositor in the endemic Hawaiian Drosophilidae

Elysse M. Craddock, Michael P. Kambysellis, Lisa Franchi, Peter Francisco, more

Journal of Morphology > 279 > 12 > 1725 - 1752

Ecological diversification of the endemic Hawaiian Drosophilidae has been accompanied by striking divergence in egg morphology, and ovarian structure and function. To determine how these flies successfully oviposit in a variety of breeding substrates, we used Scanning Electron Microscopy to examine the ultrastructure of the ovipositor of a sample of 65 Drosophila species and five Scaptomyza species...

article

Profuse evolutionary diversification and speciation on volcanic islands: transposon instability and amplification bursts explain the genetic paradox

Elysse M. Craddock

Biology Direct > 2016 > 11 > 1 > 1-15

Background Species-rich adaptive radiations arising from rare plant and animal colonizers are common on remote volcanic archipelagoes. However, they present a paradox. The severe genetic bottleneck of founder events and effects of inbreeding depression, coupled with the inherently stressful volcanic environment, would seem to predict reduced evolutionary potential and increased risk of extinction,...

article

Hawaiian Drosophila genomes: size variation and evolutionary expansions

Elysse M. Craddock, Joseph G. Gall, Mark Jonas

Genetica > 2016 > 144 > 1 > 107-124

This paper reports genome sizes of one Hawaiian Scaptomyza and 16 endemic Hawaiian Drosophila species that include five members of the antopocerus species group, one member of the modified mouthpart group, and ten members of the picture wing clade. Genome size expansions have occurred independently multiple times among Hawaiian Drosophila lineages, and have resulted in an over 2.3-fold range of genome...

article

Cultivation practices and manufacturing processes to produce Hoodia gordonii extract for weight management products

Tamsin L. Knight, Chris M. Swindells, Andrew M. Craddock, Vinesh J. Maharaj, more

Food and Chemical Toxicology > 2012 > 50 > Supplement 1 > S1-S5

Hoodia gordonii (Masson) Sweet ex Decne., is a succulent shrub, indigenous to the arid regions of southern Africa. Indigenous people have historically utilised certain species of Hoodia, including H. gordonii, as a source of food and water. Studies by the Council for Scientific and Industrial Research (CSIR, South Africa) identified that extracts of H. gordonii had appetite suppressant activity associated...

article

P.1.034 Copy number variants in CYP450 psychotropic drug metabolising enzymes in a large study of recurrent depressive disorder

J.J.H. Rucker, K. Aitchison, S. Cohen-Woods, C.M. Lewis, more

European Neuropsychopharmacology > 2011 > 21 > Supplement 1 > S28

article

Correlation of Dative Bond Length and Donor Proton Affinity in Adducts of SO ₃ : A Good Predictor for HCCCN-SO ₃

S. W. Hunt, D. L. Fiacco, M. Craddock, K. R. Leopold

Journal of Molecular Spectroscopy > 2002 > 212 > 2 > 213-218

The rotational spectrum of HCCCN-SO ₃ has been observed using Fourier transform microwave spectroscopy. The vibrationally averaged structure is that of a symmetric top, with the HCCCN axis along the C ₃ axis of the SO ₃ , and the nitrogen end near the sulfur. The N-S bond length is 2.567(13) Å, which is slightly shorter than the sum of the van der Waals radii. The NSO angle...

article

Phylogeny of the Island Populations of the HawaiianDrosophila grimshawiComplex: Evidence from Combined Data

Fabio Piano, Elysse M. Craddock, Michael P. Kambysellis

Molecular Phylogenetics and Evolution > 1997 > 7 > 2 > 173-184

The picture-winged speciesDrosophila grimshawiis unique among HawaiianDrosophilain its wide geographic range, having populations on several islands of the Hawaiian archipelago. This distribution contrasts with the pattern of single-island endemism observed in most of the picture-winged group; significantly, it does not concur with predictions of the founder theory, where speciation is the typical...

article

Pattern of ecological shifts in the diversification of Hawaiian Drosophila inferred from a molecular phylogeny

Michael P. Kambysellis, Kin-Fan Ho, Elysse M. Craddock, Fabio Piano, more

Current Biology > 1995 > 5 > 10 > 1129-1139

Background: The endemic Hawaiian drosophilids, a unique group that are remarkable for their diversity and rapid proliferation, provide a model for analysis of the process of insular speciation. Founder events and accompanying random drift, together with shifts in sexual selection, appear to explain the dramatic divergence in male morphology and mating behaviour among these flies, but these forces...

article

The Symmetry Groups of Linear Partial Differential Equations and Representation Theory, 1

M. Craddock

Journal of Differential Equations > 1995 > 116 > 1 > 202-247

We study the symmetry groups of three closely related PDEs. It is shown that the symmetry groups for these equations are actually global Lie groups and that the symmetry operations arise from standard group representation theory via intertwining operators derived from the fundamental solutions of the equations.

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