A further examination of a pre-existing bias favouring a sword in the genus Xiphophorus
A further examination of a pre-existing bias favouring a sword in the genus
Xiphophorus
复制标题
对剑龙属中先前存在的偏爱剑的偏见的进一步检查
作者：
A. Basolo
最近，性选择模型被扩大到包括预先存在的偏见模型。这个模型表明，导致男性特征进化的女性偏好可以在男性特征出现之前建立起来。先前的研究表明，在剑鱼属（由无剑的月牙鱼和剑尾组成）中，雌性南方月牙鱼（X. maculatus）更喜欢同类型的有剑的雄性，尽管系统发育证据表明，月牙鱼和剑尾的共同祖先是无剑的。在目前的研究中，发现雌性斑尾棘鱼更喜欢具有剑的自然组成部分的同种雄性，即短的下尾条纹。为了研究之前提出的偏爱剑的偏见是否仅仅是斑纹月牙鱼对这种条纹的偏好的延伸，我们测试了雌性可变月牙鱼（X. variatus）是否也表现出对带有剑的雄性的偏好；这个物种既没有剑，也没有剑的任何组成部分。雌性变异天牛被发现更喜欢有剑的雄性而不是没有剑的雄性。这项研究表明，尽管在这些物种中没有剑，但变异棘球蚴和斑纹棘球蚴都有对剑的偏好。？ 1995年动物行为研究协会
Models of sexual selection have recently been broadened to include the pre-existing bias model. This model suggests that female preferences that result in the evolution of male traits can be established prior to the appearance of a male trait. Previous work suggests that in the genus Xiphophorus, which consists of swordless platyfish and sworded swordtails, female southern platyfish, X. maculatus, prefer conspecific males with surgically attached swords, despite phylogenetic evidence that the common ancestor of platyfish and swordtails was swordless. In the present study, female X. maculatuswere found to prefer conspecific males with a naturally occurring component of the sword, an abbreviated lower caudal stripe. To investigate the possibility that the previously suggested pre-existing bias favouring a sword was merely an extension of a preference for this stripe specific to X. maculatus, whether female variable platyfish, X. variatus, also demonstrate a preference for males with swords was tested; this species has neither a sword nor any component of the sword. Female X. variatuswere found to prefer conspecific males with swords to those without. This work suggests that X. variatus and X. maculatus share a preference favouring a sword, despite the lack of a sword in these species. ? 1995 The Association for the Study of Animal Behaviour
昆虫交配系统的进化
DOI：
10.1093/acprof:oso/9780199678020.003.0004
发表时间：
2014
期刊：
--
影响因子：
--
作者：
Ritchie M
通讯作者：
Ritchie M