Keesey Ian W, Grabe Veit, Knaden Markus, Hansson Bill S
Max Planck Institute for Chemical Ecology (MPICE), Department of Evolutionary Neuroethology, Jena, Germany.
Elife. 2020 Jun 30;9:e57008. doi: 10.7554/eLife.57008.
The examination of phylogenetic and phenotypic characteristics of the nervous system, such as behavior and neuroanatomy, can be utilized as a means to assess speciation. Recent studies have proposed a fundamental tradeoff between two sensory organs, the eye and the antenna. However, the identification of ecological mechanisms for this observed tradeoff have not been firmly established. Our current study examines several monophyletic species within the group, and asserts that despite their close relatedness and overlapping ecology, they deviate strongly in both visual and olfactory investment. We contend that both courtship and microhabitat preferences support the observed inverse variation in these sensory traits. Here, this variation in visual and olfactory investment seems to provide relaxed competition, a process by which similar species can use a shared environment differently and in ways that help them coexist. Moreover, that behavioral separation according to light gradients occurs first, and subsequently, courtship deviations arise.
对神经系统的系统发育和表型特征（如行为和神经解剖学）的研究可作为评估物种形成的一种手段。最近的研究提出了两种感觉器官——眼睛和触角之间的基本权衡。然而，这种观察到的权衡的生态机制尚未得到确凿证实。我们目前的研究考察了该类群中的几个单系物种，并断言尽管它们亲缘关系密切且生态重叠，但它们在视觉和嗅觉投入上有很大差异。我们认为求偶和微生境偏好都支持这些感觉特征中观察到的反向变化。在这里，视觉和嗅觉投入的这种变化似乎提供了缓和的竞争，通过这个过程，相似物种可以以不同方式利用共享环境，从而有助于它们共存。此外，根据光梯度的行为分离首先发生，随后出现求偶偏差。
