Shantanu’s work on female colour variation in the widespread, tiny damselfly Agriocnemis pygmaea is now out! Females of this damselfly (seen at the campus pond) come in two colors: red and blue, as well as a bunch of intermediate forms. We wondered whether these colours represent allelic forms, or ontogenic (age-related) change. From laboratory studies and field observations at the pond, Shantanu found that the colour variation is ontogenic. Females start off red, and as they mature and develop eggs, they begin to look blue, resembling males. The colour change coincides with males becoming more interested in mating with them. Read the paper here, or the NCBS news article. Photograph: Shantanu Joshi.
