I examined two aspects of the reproductive behavior of the garibaldi, Hypsypops rubicundus, a temperate marine damselfish with male parental care. My primary objective was to determine the relationship between female choice and male parental investment in the care of offspring. In particular, I sought to determine: (1) how the...
Chromosome maps were made of Drosophila gibberosa salivary gland
and fat body chromosomes, and the puffing patterns were compared in
the two tissues for selected times in development. The times were
early third instar (E), late third instar (0, at pupariation
(0 hr), at two hours (2 hr), four hours...
Current evidence suggests that temporal regulation of gene
expression in eucaryotic organisms relies primarily upon localized
structural modifications of chromatin. One possible means of
changing chromatin structure is through varying the level of
acetylation of the histone proteins. Sodium butyrate has been found
to inhibit the activity of histone deacetylase...
Twenty yearling sheep were allotted to four groups, each containing
five sheep of approximately equal weight. On experimental
days 0, 1, 2, 3, and 4, each sheep in each group was given the following
inoculations by stomach tube: five sheep in group I (Fasciola
hepatica-exposed controls) were given approximately 120...
In the past decade, declines in amphibian populations have captured scientific and popular interest. The causes of the declines are likely to be complex and involve interactions between several environmental stressors. Using multifactorial experiments, I investigated the combined effects of several anthropogenic stressors on developing amphibians in Oregon, USA. In...