Behavioral Isolation due to Cascade Reinforcement in Lucania Killifish
Behavioral Isolation due to Cascade Reinforcement in Lucania Killifish
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DOI：
10.1086/680023
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发表时间：
2015-04-01
影响因子：
2.9
通讯作者：
Fuller, Rebecca C.
中科院分区：
文献类型：
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作者：
Kozak, Genevieve M.;Roland, Genevieve;Fuller, Rebecca C.
当物种之间的行为隔离由于同域性中对杂交的选择而加强时，就会发生强化。配偶偏好和他们的目标性状可能会改变同域作为强化的结果。如果同域种群进化出极端的偏好或特征，导致它们拒绝来自外来种群的个体作为配偶或被拒绝作为配偶，这可能会在物种内产生进一步的行为隔离。这个过程被称为级联强化。我们测量了同域和异域种群之间的行为隔离的Lucania鳉鱼，以确定是否隔离进化，由于物种之间的强化和强化是否影响物种内的偏好，符合级联强化假说。我们测量了种间（小露夜蛾与古露夜蛾）和种内（露夜蛾种群）两性的择偶偏好。parva）。在物种之间，雄性和雌性对同种的偏好在同域种群中最高。在种内，L.来自同域种群的小蜂雌性更喜欢自己的本地雄性而不是外来雄性。异域湖parva雌性和所有L.小蜂雄性在种内没有表现出偏好。在物种内部，行为隔离与生态变量（如盐度）无关。因此，强化是一个主要因素，产生行为隔离Lucania？？
Reinforcement occurs when behavioral isolation is strengthened between species due to selection against hybridization in sympatry. Mate preferences and their target traits may change in sympatry as a consequence of reinforcement. This can potentially generate further behavioral isolation within species if sympatric populations evolve extreme preferences or traits that cause them to reject individuals from foreign populations as mates or be rejected as mates. This process is known as cascade reinforcement. We measured behavioral isolation between sympatric and allopatric populations of Lucania killifish to determine whether isolation evolves due to reinforcement between species and whether reinforcement affects preferences within species, consistent with the cascade reinforcement hypothesis. We measured mate preferences in both sexes between species (Lucania parva vs. Lucania goodei) and within species (among populations of L. parva). Between species, both male and female preferences for conspecifics were highest in sympatric populations. Within species, L. parva females from sympatric populations preferred their own native males over foreign males. Allopatric L. parva females and all L. parva males showed no preferences within species. Within species, behavioral isolation showed no association with ecological variables, such as salinity. Thus, reinforcement is a primary factor generating behavioral isolation in Lucania killifish, creating strong preferences in both sexes among species and leading to cascade reinforcement of female mate preference within species.