Chromosomal and Behavioral Studies of Mexican Drosophila. VI. Effects of Density on Larval Digging and Pupation in Drosophila pseudoobscura

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Abstract
Ten isofemale lines of Drosophila pseudoobscura from each of three collecting sites in Mexico were tested at three different densities for porporiton of larvae pupating, pupation height, and digging depth. There were no significant differences among the populations for any of the characteristics tested. There were highly significant effects of density on proportion of larvae pupating and pupation height but not on digging depth. These results are discussed with reference to differences in the level of third chromosome inversion polymorphism of these populations and the previously tested vagility behavior.

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