Signal Traits and Oxidative Stress: A Comparative Study across Populations with Divergent Signals
Signal Traits and Oxidative Stress: A Comparative Study across Populations with Divergent Signals
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信号特征和氧化应激：具有不同信号的人群的比较研究
DOI：
10.3389/fevo.2016.00056
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发表时间：
2016
影响因子：
3
通讯作者：
R. Safran
中科院分区：
文献类型：
--
作者：
Maren N. Vitousek;Oldřich Tomášek;T. Albrecht;Matthew R. Wilkins;R. Safran
不同的种群经常改变信号使用的模式--这一过程可能导致生殖隔离和物种形成。然而，目前尚不清楚为什么大多数性状在分歧期间获得或失去信号值。这可能发生的一个原因是因为信号和相关生理参数之间的关系的变化降低了信号的可靠性，甚至改变了其潜在的信息内容。在这里，我们测试的假设，信号性状的阐述和有机体健康的核心组成部分-氧化应激-之间的关系不同的密切相关的人群，在信号的使用和偏好有分歧。在最近分化的家燕亚种复合体（Hirundo rustica，家庭：Hirundinidae）中，不同的种群使用不同的特征作为性信号。其中两个性状，腹侧胸羽色和尾带长度，在北美黑腹蛛之间有显著差异。R. erythrogaster和欧洲H. R.乡下人尽管存在这种差异，腹侧羽色的变化同样与两个种群的氧化损伤指标相关。然而，这些关系的方向性不同的性别：深色男性谷仓燕子有较高水平的血浆氧化损伤比他们的轻同行，而相反的关系被认为是在女性。相反，尾流光长度和氧化应激措施之间的关系是不一致的人群。分析表明，欧洲H. R. rustica，其中男性轴承细长飘带作为配偶的首选，较长streamered男性更氧化强调，然而，相反的模式在北美H。R.红腹尾流光长度与两个群体中的女性氧化应激指标无关。不同人群和性别之间较强信号者的生理状态差异可能与信号加工的成本或限制有关（例如，与黑素生成相关的生物化学途径），或反映信号介导的社会相互作用如何影响氧化应激的差异。总的来说，我们的研究结果表明，虽然一些表型性状似乎能够传达类似的生理信息，无论其作为信号的使用，在其他表型性状的分歧可能与其信息内容的变化。
Diverging populations often shift patterns of signal use – a process that can contribute to reproductive isolation and speciation. Yet it is not clear why most traits gain or lose signal value during divergence. One reason this could occur is because changes in the relationship between signals and relevant physiological parameters degrade the reliability of a signal, or even change its underlying information content. Here we test the hypothesis that the relationship between signal trait elaboration and a central component of organismal health – oxidative stress – differs across closely related populations that have diverged in signal use and preferences. In the recently diverged barn swallow subspecies complex (Hirundo rustica, Family: Hirundinidae), different populations use different traits as sexual signals. Two of these traits, ventral breast plumage color and tail streamer length, differ markedly between North American H. r. erythrogaster and European H. r. rustica. Despite this divergence, variation in ventral plumage color was similarly associated with measures of oxidative damage across both populations. However, the directionality of these relationships differed between the sexes: darker male barn swallows had higher levels of plasma oxidative damage than their lighter counterparts, while the opposite relationship was seen in females. In contrast, relationships between tail streamer length and measures of oxidative stress were not consistent across populations. Some analyses indicated that in European H. r. rustica, where males bearing elongated streamers are preferred as mates, longer-streamered males were more oxidatively stressed; however, the opposite pattern was suggested in North American H. r. erythrogaster. Tail streamer length was not associated with measures of oxidative stress in females of either population. Differences in the physiological state of stronger signalers across populations and between the sexes may be related to costs or constraints on signal elaboration (e.g., biochemical pathways associated with melanogenesis), or reflect differences in how signal-mediated social interactions influence oxidative stress. Overall, our results suggest that while some phenotypic traits appear to be capable of conveying similar physiological information regardless of their use as signals, divergence in other phenotypic traits may be associated with shifts in their information content.
Agouti 相关蛋白刺激灵长类动物的下丘脑-垂体-肾上腺 (HPA) 轴并增强 HPA 对白介素-1 的反应。
影响因子：
4.8
作者：
Xiao,Ennian;Xia-Zhang,Linna;Vulliemoz,NicolasR;Ferin,Michel;Wardlaw,SharonL
通讯作者：
Wardlaw,SharonL