Sympatric Speciation by Sexual Selection: A Critical Reevaluation
Sympatric Speciation by Sexual Selection: A Critical Reevaluation
复制标题
性选择的同域物种形成：批判性的重新评估
DOI：
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发表时间：
2004
影响因子：
2.9
通讯作者：
F. Weissing
中科院分区：
文献类型：
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作者：
G. S. V. Doorn;U. Dieckmann;U. Dieckmann;F. Weissing
一些实证研究提出性选择是同域物种形成的重要驱动力。这一想法与最近的模型一致，表明物种形成可能通过单个种群内不同的费舍尔失控过程进行。尽管如此，迄今为止的模型还无法证明同域物种形成可以作为仅由性选择驱动的完全适应性过程展开。大多数模型或明或暗地依赖非选择性因素来启动物种形成。事实上，它们并没有对引发不同失控过程所需的女性偏好的巨大差异提供选择性解释。我们认为，这种变异可能是由破坏性选择引起的，但前提是对女性偏好的选择依赖于频率。因此，在传统的女性选择模型中，适应性物种形成是无法实现的，该模型假设女性偏好的选择与频率无关。然而，当频率依赖的性选择过程与配偶选择同时起作用时，真正适应性的同域物种形成就变得可行。然后，物种形成独立于非适应性过程而启动，并且不会受到与当前费舍尔物种形成失控模型相关的理论弱点的影响。然而，适应性物种形成需要多种机制的同时作用，因此它发生的条件比早期的性选择同域物种形成模型所暗示的条件要严格得多。
Several empirical studies put forward sexual selection as an important driving force of sympatric speciation. This idea agrees with recent models suggesting that speciation may proceed by means of divergent Fisherian runaway processes within a single population. Notwithstanding this, the models so far have not been able to demonstrate that sympatric speciation can unfold as a fully adaptive process driven by sexual selection alone. Implicitly or explicitly, most models rely on nonselective factors to initiate speciation. In fact, they do not provide a selective explanation for the considerable variation in female preferences required to trigger divergent runaway processes. We argue that such variation can arise by disruptive selection but only when selection on female preferences is frequency dependent. Adaptive speciation is therefore unattainable in traditional female choice models, which assume selection on female preferences to be frequency independent. However, when frequency‐dependent sexual selection processes act alongside mate choice, truly adaptive sympatric speciation becomes feasible. Speciation is then initiated independently of nonadaptive processes and does not suffer from the theoretical weaknesses associated with the current Fisherian runaway model of speciation. However, adaptive speciation requires the simultaneous action of multiple mechanisms, and therefore it occurs under conditions far more restrictive than earlier models of sympatric speciation by sexual selection appear to suggest.