January 13, 2007 at 11:19 AM · Filed under biology, ecology, evolution, host-parasite, photography
Pictured is a comparison of an infected (top) and uninfected (bottom) freshwater snail, Potamopyrgus antipodarum. The parasite is called Microphallus, and can colonize the snail hen the snail passively ingests Microphallus eggs while feeding. The snail serves as an intermediate host for the parasite–meaning that the parasite needs the snail’s resources to develop and reach its next host. Often these final hosts are waterfowl, though in the lab mice are used for experimental purposes.
This images was made in the lab of Curt Lively at the Department of Biology at Indiana University, Bloomington.
Digital Print
1′x1′
2003
January 13, 2007 at 11:09 AM · Filed under biology, ecology, evolution, photography
The cover photograph demonstrates sexual dimporphism in a flowering plant, Silene latifolia. I made the image while working as a research assistant in Lynda Delph’s lab in the Department of Biology at Indiana University in Bloomington. The
Pictured are the female (left) and male (right) reproductive organs. Notice the extreme differences in size. There is enough genetic variation in many populations of Silene latifolia such one can reduce or expand the degree of dimorphism by artifically selecting on a physical trait such as calyx width or flower number.
Gender and Sexual Dimorphism in Flowering Plants. 1999. M.A. Geber, T.E. Dawson, and L.F. Delph, Eds. Springer, Berlin.
