...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Experimental Biology >Carotenoid-based coloration, oxidative stress and corticosterone in common lizards
【24h】

Carotenoid-based coloration, oxidative stress and corticosterone in common lizards

机译：普通蜥蜴中类胡萝卜素的着色，氧化应激和皮质酮

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Environmental factors including stressors, health status and social context significantly affect carotenoid-based coloration. For instance, stressors may induce the diversion of carotenoids from pigmentation pathways, potentially explaining why stressed animals often exhibit reduced coloration. However, we recently showed that high blood corticosterone concentrations, which are part of the physiological stress response, are associated with increased redness of the belly in the common lizard (Lacerta vivipara). This result clearly contrasts with the findings of many studies of carotenoid-based coloration because corticosterone is believed to increase oxidative stress. Here, we examined whether these positive effects are influenced by differences in food availability. We tested the effect of high corticosterone levels on carotenoid-based coloration, antioxidant enzyme activity and oxidative damage in common lizards subject to low and high food availability. Food restriction abolished the carotenoid-based color enhancement when corticosterone concentrations in animals were high. We discuss how carotenoid-based color can honestly signal individual quality in this species and how the increased redness induced by corticosterone could be a terminal investment in an environment where long-term survival prospects are poor but not when immediate survival is endangered.
机译：包括压力源，健康状况和社会背景在内的环境因素会严重影响基于类胡萝卜素的着色。例如，压力源可能诱导类胡萝卜素从色素沉着途径转移，这可能解释了为什么压力过的动物经常表现出减少的着色。但是，我们最近发现，高浓度的皮质酮是生理应激反应的一部分，与普通蜥蜴（Lacerta vivipara）腹部的发红增加有关。该结果与许多基于类胡萝卜素的着色的研究结果明显不同，因为认为皮质酮会增加氧化应激。在这里，我们检查了这些积极影响是否受到食物供应差异的影响。我们测试了高皮质酮水平对普通蜥蜴的类胡萝卜素显色，抗氧化酶活性和氧化损伤的影响，这些食物受到食物供应量的限制。当动物体内的皮质酮浓度高时，食物限制取消了基于类胡萝卜素的颜色增强。我们讨论基于类胡萝卜素的颜色如何诚实地表示该物种的个体品质，以及在长期生存前景较差但即时生存受到威胁的情况下，皮质类固醇引起的红肿增加如何作为最终投资。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号