Divergence in brain composition during the early stages of ecological specialization in Heliconius butterflies
Divergence in brain composition during the early stages of ecological specialization in Heliconius butterflies
复制标题
赫利康蝴蝶生态专业化早期阶段大脑成分的差异
DOI：
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发表时间：
2017
影响因子：
2.1
通讯作者：
R. Merrill
中科院分区：
文献类型：
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作者：
Stephen H. Montgomery;Stephen H. Montgomery;R. Merrill
在跨越生态梯度的物种形成过程中，不同的种群暴露在对比鲜明的感官和空间信息中，这些信息提出了新的行为和感知挑战。这些挑战可以通过遗传或环境诱导的大脑功能变化来应对，这些变化介导了行为。然而，很少有研究调查的模式，神经分歧的早期阶段的物种形成，抑制我们的理解这些过程的相对重要性。在这里，我们提供了一个新的案例研究。早期种对Heliconius erato和H. himera，在环境和海拔梯度上都是parapatric。尽管基因流动不断，但这些物种具有不同的生态、行为和生理特征。我们证明，这些类群也显着不同的大脑组成，特别是在相对水平的投资结构，处理感官信息。这些差异不仅仅是由环境诱导的可塑性来解释的，还包括大脑结构中遗传的、非异速生长的变化。我们认为，这些差异反映了分歧，以满足不同的感官生态的需求。这一结论支持了大脑结构和功能的进化在促进生态独特物种的出现中起重要作用的假设。
During speciation across ecological gradients, diverging populations are exposed to contrasting sensory and spatial information that present new behavioural and perceptive challenges. These challenges may be met by heritable or environmentally induced changes in brain function which mediate behaviour. However, few studies have investigated patterns of neural divergence at the early stages of speciation, inhibiting our understanding of the relative importance of these processes. Here, we provide a novel case study. The incipient species pair, Heliconius erato and H. himera, are parapatric across an environmental and altitudinal gradient. Despite ongoing gene flow, these species have divergent ecological, behavioural and physiological traits. We demonstrate that these taxa also differ significantly in brain composition, in particular in the relative levels of investment in structures that process sensory information. These differences are not explained solely by environmentally‐induced plasticity, but include heritable, nonallometric shifts in brain structure. We suggest these differences reflect divergence to meet the demands of contrasting sensory ecologies. This conclusion would support the hypothesis that the evolution of brain structure and function play an important role in facilitating the emergence of ecologically distinct species.
DOI：
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发表时间：
1997
期刊：
Acta physiologica Scandinavica. Supplementum
影响因子：
--
作者：
Finger,TE
通讯作者：
Finger,TE
DOI：
10.1073/pnas.94.5.2001
发表时间：
1997-03-04
影响因子：
11.1
作者：
Balaban, E
通讯作者：
Balaban, E
神经结构与视觉表现的相关性：双翅目视觉系统的系统发育保守和变异。
DOI：
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发表时间：
1997
期刊：
The Journal of comparative neurology.
影响因子：
--
作者：
Buschbeck,EK;Strausfeld,NJ
通讯作者：
Strausfeld,NJ