March 25, 2024 Graham, Z. A., D. J. Padilla-Perez and M. J. Angilletta. 2020. Virile crayfish escalate aggression according to body size instead of weapon size. Animal Behaviour 163(May):9-15. Home » Graham, Z. A., D. J. Padilla-Perez and M. J. Angilletta. 2020. Virile crayfish escalate aggression according to body size instead of weapon size. Animal Behaviour 163(May):9-15.