Table S1.
Testing for difference in fertilization success in crosses between LAT and SAT offspring and wild-type fish, including both sexes in one model
| Parameter | χ2 | df | P |
| Treatment | 0.245 | 1 | 0.621 |
| Sex | 177.33 | 1 | <0.0001 |
| Treatment × sex | 15.63 | 1 | <0.0001 |
Where the term “sex” was significant, we analyzed the two sexes separately.