Mean male size (+/- standard error) as a function of their rank by the transitive females. The body size was measured as the standard length, from the tip of the mouth to the caudal peduncle. The mean male sizes were computed for the 36 females having made a transitive ordering of the triplet of males: male 1 was preferred over male 2, male 2 over male 3, and male 1 over male 3. Different letters mean statistically significant difference. The horizontal dotted line depicts the mean female size. (A) Choice made by the smaller females (n = 19). (B) Choice made by the larger females (n = 17).