title: Behavioural ecology: transient sexual mimicry leads to fertilization.
abstract: Sexual mimicry among animals is widespread, but does it impart a fertilization advantage in the widely accepted 'sneak-guard' model of sperm competition? Here we describe field results in which a dramatic facultative switch in sexual phenotype by sneaker-male cuttlefish leads to immediate fertilization success, even in the presence of the consort male. These results are surprising, given the high rate at which females reject copulation attempts by males, the strong mate-guarding behaviour of consort males, and the high level of sperm competition in this complex mating system.
authors.affiliation: Marine Resources Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA. rhanlon@mbl.edu
authors.forename: Roger T
authors.initials: RT
authors.lastname: Hanlon
authors.forename: Marié-Jose
authors.initials: MJ
authors.lastname: Naud
authors.forename: Paul W
authors.initials: PW
authors.lastname: Shaw
authors.forename: Jon N
authors.initials: JN
authors.lastname: Havenhand
mesh_terms: D000220:Adaptation, Biological; D000818:Animals; D003163:Competitive Behavior / Q000502:physiology*; D003307:Copulation / Q000502:physiology; D005260:Female; D005306:Fertilization / Q000502:physiology*; D005838:Genotype; D008297:Male; D008974:Mollusca / Q000235:genetics / Q000502:physiology*; D010641:Phenotype; D012727:Sex Characteristics; D012744:Sex Ratio; D012726:Sexual Behavior, Animal / Q000502:physiology*