Tufts University  |  School of Arts and Sciences  |  Department of Biology  |  Find People  | 
   

People

Sara M. Lewis, Principal Investigator

The Lewis laboratory is interested in a broad range of questions in evolutionary ecology, and our research is aimed at understanding how selection acts in natural populations. This work combines field and laboratory experiments, and uses a variety of model organisms including insects, fish, and marine invertebrates.

One major research focus concerns the key evolutionary process of sexual selection, based on differences among individuals in their mating and/or paternity success. We are particularly interested in how variation in sex ratio, population density, and parental investment patterns determines both courtship behaviors and post-copulatory behaviors. This work includes studies that have explored:

  • Mechanisms of sperm precedence
  • Nuptial gift evolution
  • Ecological context of sexual selection