Inbreeding Affects Female Preference for Symmetry in Computer-Animated Sticklebacks
Inbreeding Affects Female Preference for Symmetry in Computer-Animated Sticklebacks
复制标题
近亲繁殖影响了计算机动画刺鱼中雌性对对称性的偏好
作者：
D. Mazzi;R. Künzler;C. Largiadèr;T. Bakker
波动性不对称是个体在发育过程中无法科普压力而导致的双侧性状与完美对称的微小随机偏差。第二性征的不对称程度被认为传达了关于男性的表型和/或遗传质量的信息，因此女性被期望使用双侧对称作为择偶的线索。以雌性三棘鱼（Gasterosteus aculeatus L.）已经近亲繁殖了一代，而远交的控制组雌性动物在计算机动画的雄性模型之间进行选择，这些模型只在骨盆脊柱的对称性上有所不同。近亲繁殖的女性表现出显着更强的偏好的对称模型比远交的女性，这表明，女性相对较差的质量更愿意付出代价的挑剔，并获得更高的边际收益，从他们的歧视比女性更好的质量。
Fluctuating asymmetries are small random deviations from perfect symmetry in bilateral traits caused by the inability of individuals to cope with stress during development. The degree of asymmetry of secondary sexual characters is supposed to convey information about a male's phenotypic and/or genetic quality, and females are thus expected to use bilateral symmetry as a cue in mate choice. We offered female three-spined sticklebacks (Gasterosteus aculeatus L.) that had been inbred for one generation and outbred control females the choice between computer-animated male models differing exclusively in the symmetry of their pelvic spines. Inbred females exhibited a significantly stronger preference for the symmetric model than outbred females, suggesting that females of relatively poor quality are more prepared to pay the costs of choosiness and obtain higher marginal benefits from their discrimination than females of better quality.