FEMALE PREFERENCES FOR NATURALLY-OCCURRING NOVEL MALE TRAITS by INGO SCHLUPP 1,2,3) , MEIKE WASCHULEWSKI 1) and MICHAEL J. RYAN 1,4) ( 1 Universität Hamburg, Zoologisches Institut und Museum, Martin-Luther-King-Platz 3, D-20146 Hamburg, Germany; 2 University of Texas, Department of Zoology, Austin, TX 78712, USA) (Acc. 6-IV-1999) Summary We report two independent cases of female preferences for novel male traits in two species of poeciliid sh, Poecilia latipinna and Poecilia mexicana . In both cases the preference predates the occurrence of the trait, lending strong support to the pre-existing bias hypotheses. This support is independent of the assumptions associated with phylogenetic inference. Unlike the two sexual species, the unisexual hybrid P. formosa had no detectable preference for the novel male traits. Keywords: pre-existing bias, novel ornament, sexual selection, tumor, Poecilia latipinna , Poecilia mexicana , Poecilia formosa . Introduction The temporal sequence of the evolution of preferences and traits is almost always unknown. Both trait and preference can evolve simultaneously or either trait or preference can evolve rst and then come under sexual 3) Corresponding author; e-mail address: firstname.lastname@example.org 4) We thank C. Bell and L. Higgins for help with collecting the sh in Texas. L.
Behaviour – Brill
Published: Jan 1, 1999
Keywords: POECILIA FORMOSA; POECILIA LATIPINNA; POECILIA MEXICANA; NOVEL ORNAMENT; PRE-EXISTING BIAS; SEXUAL SELECTION
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