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Full-Text Articles in Life Sciences
Environmental Effects On Remating In Drosophila Melanogaster, Lawrence G. Harshman, Ary A. Hoffman, Timothy Prout
Environmental Effects On Remating In Drosophila Melanogaster, Lawrence G. Harshman, Ary A. Hoffman, Timothy Prout
Lawrence G. Harshman Publications
The effects of density and food on remating were investigated using Drosophila melanogaster. The frequency of remating was unaffected by density for some combinations of fly strains but was reduced at low relative densities for other combinations. Until females had used most of their stored sperm, remating was less likely when food was absent or contact with food was prevented. Food availability had little effect on the incidence of remating once stored sperm were depleted and had no effect on initial virgin mating frequency. This study indicates that environmental factors can have a substantial direct influence on the frequency …
Genic Studies Of Lasiurus (Chiroptera: Vespertilionidae), Robert J. Baker, John C. Patton, Hugh H. Genoways, John W. Bickham
Genic Studies Of Lasiurus (Chiroptera: Vespertilionidae), Robert J. Baker, John C. Patton, Hugh H. Genoways, John W. Bickham
University of Nebraska State Museum: Mammalogy Papers
Bats of the genus Lasiurus present a number of interesting systematic problems that are difficult to resolve by traditional techniques. Members of the genus share a suite of derived morphological (Hall and Jones, 1961; Handley , 1960) and karyotypic (Bickham 1979, 1988) characteristics. However, until 1960 (Handley, 1960), members were placed in two genera- Lasiurus and Dasypterus-based primarily upon the presence or absence of the small, first upper premolar. Handley (1960) analyzed the differences and similarities among these two genera and concluded they were not distinct even at a subgeneric level. One goal of this study was to provide …