Divergent Evolution of Male Aggressive Behaviour: Another Reproductive Isolation Barrier in Extremophile Poeciliid Fishes?
Figure 1
(a) Fight intensity and (b) “fight evenness” (see main text) in relation to the two opponents’ body size difference (as standard length (SL) difference). Shown are regression lines representing the best-fit (a: logarithmic model; b: logistic model) and 95% confidence intervals ( fights).
