My PhD research focused on the evolution of sperm morphology, especially in the obscura sub-genus of Drosophila. These ~55 species of fruitflies are fairly unusual, in that they have two discrete sperm morphs: one is longer and is capable of fertilisation, and the other is short and apparently never fertilises eggs. My PhD tried to figure out why the flies have evolved two types of sperm when most species do fine with just one. We found some evidence that the smaller sperm improve the survival of their larger brothers after mating, though I’d like to revisit this problem someday and figure it out once and for all!
- Even more functions of sperm RNA: a response to Hosken and Hodgson
- Random sperm use and genetic effects on worker caste fate in Atta colombica leaf‐cutting ants
- Sperm viability staining in ecology and evolution: potential pitfalls
- Drosophila melanogaster seminal fluid can protect the sperm of other males
- A sterile sperm caste protects brother fertile sperm from female-mediated death in Drosophila pseudoobscura