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Spiroplasma (Entomoplasmatales) Associated With Tabanidae (Diptera) And Lampyridae (Coleoptera), Jimmy Wedincamp Jr.

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Abstract 1:

To determine the exit points of Spiroplasma from tabanids, 45 naturally infected Tabanus gladiator and 6 T. sulcifrons were restrained and fed 10% sucrose. The flies were allowed to feed for 24 hours and the resulting oral and anal specks were cultured in MID broth. Spiroplasmas were isolated from 21 of 51 oral specks but none of 23 anal specks deposited on plastic. In contrast, when anal specks were deposited in a sucrose solution, 9 of 28 anal specks in sucrose yielded spiroplasma cultures. Air-dried spiroplasma cultures in 5% sucrose survived for up to 30 days in the …

Characterization And Genetic Analysis Of A Pigmentation Mutant Of Neurospora Crassa, Craig West Banks

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The mutant overaccumulator of carotenoids, ovc. was obtained from the Fungal Genetics Stock Center in Kansas City, Kansas. This mutant had been isolated following UV irradiation of the colonial mutant col-4 and mapped to Linkage Group IV (R. Harding, 1984 Neurospora Newsletter 34: 23-25). Examination of ovc in our laboratory revealed that in addition to having increased pigmentation, the mutant was osmotic sensitive, failing to grow on 6% NaCl. Morphology of ovc closely resembles that of cut, another osmotic sensitive mutant in LG IV. A cross of ovc to the osmotic sensitive mutant cut failed to produce …

The Role Of Sexual Selection In Structuring West Indian Passerine Communities, C. Lynne Starling

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Patterns of plumage dimorphism were examined among species of passerines native to 19 West Indian islands. Based on sexual selection theory, the predictions were made that dimorphic species: (1) occur on fewer and larger islands than monomorphic species due to reduced colonization ability and reduced survivorship imposed by sexual selection pressure, and (2) should be added to island communities disproportionately as area increases, an idea which was tested using linear models.

No significant difference was observed between number of islands or minimum island area occupied by dimorphics versus monomorphics. The traditional ANCOVA model best fits the data and suggests that …

Susceptibility Of Eumeces Species Skinks To A Southeastern Isolate Of The Lyme Disease Spirochete (Borrelia Burgdorferi), Gregory A. Cummins

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The SI-4 strain of Borrelia burgdorferi obtained from field collected Ixodes scapularis on Sapelo Island, Georgia, was infective to seven of eight cotton mice (Peromyscus gossypinus) by needle inoculation. I. scapularis larvae were then fed on them, and nymphs molting from these larvae were then fed on laboratory mice, Mus musculus, in an attempt to transmit the spirochete. One of three mice was successfully infected; confirmation of the presence of B. burgdorferi was made using BSK II culture and the polymerase chain reaction (PGR). A subsequent attempt was made to determine if SI-4 was infective for Eumeces …