Relatedness can affect fitness through modulation of intrasexual competition in Drosophila melanogaster; male competition and female harm are lower when three related males compete over an unrelated female than when three unrelated males compete, but when two brothers and an unrelated male compete, the unrelated male sires twice as many offspring as either brother, suggesting that minorities of unrelated competitors may be able to infiltrate coalitions of relatives.
- Pau Carazo
- Cedric K. W. Tan
- Tommaso Pizzari
