Sex Recognition via Chemical Cues in the Sex-Role-Reversed Gulf Pipefish (Syngnathus scovelli)
نویسندگان
چکیده
Mate choice is often based on multivariate suites of traits perceived in more than one sensory modality (Partan & Marler 2005). A variety of scenarios have recently been proposed to address how these complex sets of traits evolve (Candolin 2003; Hebets & Papaj 2005) and interact to elicit receiver responses (Rowe 1999; Partan & Marler 2005; Chenoweth & Blows 2006). Sex-role-reversed systems provide an excellent opportunity to examine complex trait evolution because the same processes underlying evolution when males are experiencing stronger sexual selection should apply when females experience stronger sexual selection, except that the constraints on the sexes differ in sex-role-reversed taxa compared to taxa with ordinary sex roles. For example, in sex-role-reversed species females must evolve traits involved in competition for access to mates, while still producing energetically expensive gametes. In addition, male choice has evolved recently in most sex-role-reversed taxa, so the history of evolution of multivariate signaling may be better reconstructed in such taxa. The first step is to characterize the sensory modalities involved in mate choice in sex-role-reversed species. Over 20 years of research has been conducted on mate choice in pipefishes and seahorses (Berglund Correspondence N. L. Ratterman, Department of Biology, Texas A&M University, 3258 TAMU, College Station, TX 77840-3258, USA. E-mail: [email protected]
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