Geographic variation in female mate-copying in the species complex of a unisexual fish, Poecilia formosa Katja U. Heubel 1,2,3) , Katja Hornhardt 1) , Tanja Ollmann 1) , Jakob Parzefall 1) , Michael J. Ryan 2) & Ingo Schlupp 1,2,4) ( 1 Universität Hamburg, Biozentrum Grindel, Hamburg, Germany; 2 University of Texas, Section of Integrative Biology, Austin, TX 78712, USA) (Accepted: 19 February 2008) Summary The Amazon molly, Poecilia formosa , is a gynogenetic, all-female fish. Its mating system relies on heterospecific matings with males of closely related sexual species. In mixed popu- lations, males mate with conspecific sexual females and heterospecific asexual females. Such matings are not isolated dyadic interactions but rather elements of a communication net- work, because multiple females can observe these interactions. This is the only known case of heterospecific mate-copying and, thus, a system in which the potential for mate-copying could be influenced by the presence of another species. Here we show that mate-copying is exhibited by the sexual species P. mexicana and P. latipinna , and the asexual P. formosa . Both sexual and asexual females copy each other’s mate choice decisions in sympatry, but females from allopatric populations do not show
Behaviour – Brill
Published: Jan 1, 2008
Keywords: SEXUAL-ASEXUAL COEXISTENCE; MALE MATING BEHAVIOUR; ASSOCIATION PREFERENCES; VIDEO PLAYBACK; FEMALE CHOICE; EVOLUTION OF MATE-COPYING; VISUAL COMMUNICATION
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