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Full-Text Articles in Life Sciences
Bower Size And Male Reproductive Success In A Cichlid Fish Lek, Kenneth R. Mckaye, Svata M. Louda, Jay R. Stauffer, Jr.
Bower Size And Male Reproductive Success In A Cichlid Fish Lek, Kenneth R. Mckaye, Svata M. Louda, Jay R. Stauffer, Jr.
School of Biological Sciences: Faculty Publications
Sexual selection may be a major factor in the proliferation of polygamous species (Lande 1981). When males provide no resources or parental care and females have numerous males from which to choose, "extravagant" male secondary characteristics may result solely from sexual selection (Darwin 1871; Fisher 1930; Lande 1981). Dominey (1984) argued that such "runaway" sexual selection was the driving mechanism behind the explosive speciation of the polygamous cichlid fishes in the Great Lakes of Africa. However, the few studies examining cichlid mate selection in situ have concentrated primarily on species engaging in biparental care of the young (Perrone 1978; Neil …
Relationships Between Blood Parasites, Mating Success And Phenotypic Cues In Male Sage Grouse Centrocercus Urophasianus, Robert M. Gibson
Relationships Between Blood Parasites, Mating Success And Phenotypic Cues In Male Sage Grouse Centrocercus Urophasianus, Robert M. Gibson
School of Biological Sciences: Faculty Publications
In lek breeding Sage Grouse Centrocercus urophasianus in eastern California, male mating success is strongly correlated with individual differences in lek attendance, and in the rate and acoustic quality of courtship display, suggesting that these provide cues by which females choose mates. Increased lek attendance and high display rates also associated with elevated metabolic expenditure. This paper examines the hypothesis that the ability to commit energy to display is related to the incidence of blood parasites. A single hematozoan genus, Haemoproteus, was found in 37.5% of 184 Sage Grouse sampled over a five year period. Parasitism varied across years and …
The Functional Organization Of The Vestigial Locus In Drosophila Melanogaster, Jim A. Williams, Audrey L. Atkin, John B. Bell
The Functional Organization Of The Vestigial Locus In Drosophila Melanogaster, Jim A. Williams, Audrey L. Atkin, John B. Bell
School of Biological Sciences: Faculty Publications
Vestigial mutants are associated with imaginal disc cell death which results in the deletion of adult wing and haltere structures. The vestigial locus has previously been cloned, and mutational lesions associated with a number of vg alleles were mapped within a 19 kb DNA region defined as essential for vg function. Herein we report the identification and characterization of a developmentally regu-lated 3.8 kb vg transcript which is spliced from exons distributed throughout the essential interval defined above. All the characterized classical alleles have predictable effects on this transcription unit, and the severity of this effect is directly proportional to …
Construction Of An Opal Suppressor By Oligonucleotide-Directed Mutagenesis Of A Saccharomyces Cerevisiae Trna Gene, Audrey L. Atkin, K. L. Roy, J. B. Bell
Construction Of An Opal Suppressor By Oligonucleotide-Directed Mutagenesis Of A Saccharomyces Cerevisiae Trna Gene, Audrey L. Atkin, K. L. Roy, J. B. Bell
School of Biological Sciences: Faculty Publications
In vitro mutagenesis was used to create putative opal suppressor alleles of a tRNATrp gene of Saccharomyces cerevisiae. The construct with the requisite anticodon change did not result in an active suppressor, whereas when a second change was introduced into the portion of the gene encoding the intron, an active and specific opal suppressor was produced. We propose that the secondary structure of transcripts from the first mutant may prevent efficient pre-tRNA processing, whereas normal processing occurs with the double mutant.