Divergent Evolution of Male Aggressive Behaviour: Another Reproductive Isolation Barrier in Extremophile Poeciliid Fishes?
Figure 5
Mean (±SE) numbers of aggressive and sexual behaviours shown by males in cross-population dyadic fights () between Río Oxolotán (Ox) males and males from chamber X of the sulphidic Cueva del Azufre (CA-X). All comparisons were statistically different between populations (see main text).
