Degree Name

Master of Science (MS)

Semester of Degree Completion


Thesis Director

Kandy D. Baumgardner


The pre-adult viability of four pure strains and two hybrid strains was determined for Drosophila melanogaster. The data fail to show significant mortality and the ratios of the duration of the three different stages remained approximately constant. There are many factors which have been found to affect survivorship; one factor is density. As density of population within a limited and closed universe increases, the rate of mortality would increase and viability would generally decrease. However, our densities were well within the range having no effect on viability. Under the conditions these experiments were performed, no genetic or environmental factors were found that caused marked interstrain differences in pre-adult survivorship. This is in marked contrast to the results observed for adults of these same strains.

Included in

Entomology Commons