We reared and recorded behaviours of clonal Amazon mollies in standardized environments, with and without predation stress, from birth through week four of life, to understand how the developmental e...

Behavioral differences among groups can have profound impacts on individual fitness,1 yet how group-level phenotypes arise and change during developme…

We found that Amazons and Sailfins differed in their qualitative, but not quantitative, resistance to parasites. Amazons had worse qualitative resistance (i.e., were more likely to be infected with a...