M. J. Usher

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Following eclosion, adult Calliphora stygia were individually housed (at 22 degrees C and 73% RH) in 125 ml plastic vials and provided with ad libitum access to either 0.125 or 0.2M sucrose as a food source and daily food consumption measured throughout their adult life. All blowflies were weighed daily and food consumed is determined by weighing individual(More)
This thesis takes up a program initiated by S. Donaldson and I. Smith aimed at using symplectic Lefschetz fibration techniques to obtain information about pseudoholomor-phic curves in symplectic 4-manifolds. Donaldson and Smith introduced an invariant DS which counts holomorphic sections of a relative Hilbert scheme constructed from a symplectic Lefschetz(More)
The membrane pacemaker theory of ageing proposes that the polyunsaturated fatty acid (PUFA) composition of membrane lipids of a species is an important determinant of its maximum lifespan. We report three experiments using the blowfly Calliphora stygia, where this theory was tested by manipulation of dietary fat profile. Although the fat profile of the(More)
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