A colour and size dimorphism in the green swordtail (population Jalapa): female mate choice, male–male competition, and male mating strategies

@article{Franck2003ACA,
  title={A colour and size dimorphism in the green swordtail (population Jalapa): female mate choice, male–male competition, and male mating strategies},
  author={Dierk Franck and Agn{\`e}s M{\"u}ller and Natascha Rogmann},
  journal={acta ethologica},
  year={2003},
  volume={5},
  pages={75-79}
}
Two types of males are present in the Jalapa population of Xiphophorus helleri: Males with a black or dark brownish mid-lateral stripe ("black males") mature earlier and are smaller than males with a red or brownish mid-lateral stripe ("red males"). We tested the hypothesis that the colour patterns of red males may be regarded as ornaments, which evolved as the result of inter- and/or intrasexual selection. As predicted, in choice tests females exhibited a strong preference for red versus black… CONTINUE READING
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