The influence of ambient ultraviolet light on sperm quality and sexual ornamentation in three-spined sticklebacks (Gasterosteus aculeatus)
The influence of ambient ultraviolet light on sperm quality and sexual ornamentation in three-spined sticklebacks (Gasterosteus aculeatus)
复制标题
环境紫外线对三刺刺鱼（Gasterosteus aculeatus）精子质量和性装饰的影响
DOI：
10.1007/s00442-013-2773-x
复制
发表时间：
2014
期刊：
影响因子：
2.7
通讯作者：
Bakker
中科院分区：
文献类型：
--
作者：
Mehlis;Bakker
暴露于更高水平的环境紫外线辐射可对水生生物产生不利影响，包括在细胞和分子水平上的损害以及发育、繁殖力和存活的损害。许多研究都是关于有害的UVB辐射的作用。然而，由于其在水中的更大渗透性，更丰富的UVA辐射也可以作为环境应激源。虽然精子细胞特别容易受到紫外线诱导的氧化应激，但紫外线对精子特性的影响知之甚少。此外，紫外线相关的氧化状态的变化可能会影响表型表达的积极昂贵的性饰品。我们调查了长期暴露于生态相关水平的模拟UVA辐射对三棘鱼精子质量和性取向的影响。雄性被分配到三个不同的紫外线光谱部分的光谱暴露治疗，使他们收到增强，中度或无UVA辐射。结果表明，暴露于增强的环境UVA水平对雄性繁殖着色和精子速度都有不利影响，提供证据表明，紫外线辐射影响交配前和交配后性选择的目标性状。通过强调UVA作为影响健身相关特征的因素的作用，我们的研究结果可能有助于更好地了解当前和未来太阳紫外线辐射水平对交配系统和生命史的影响。
Exposure to enhanced levels of ambient ultraviolet (UV) radiation (UVR) can have adverse effects on aquatic organisms including damage at the cellular and molecular level and impairment of development, fecundity and survival. Much research has been conducted on the role of the harmful UVB radiation. However, due to its greater penetration in water the more abundant UVA radiation can also act as an environmental stressor. Little is known about UVR effects on sperm characteristics although sperm cells should be especially prone to UV-induced oxidative stress. Moreover, UV-related changes in oxidative status may affect the phenotypic expression of energetically costly sexual ornaments. We investigated the effects of long-term exposure to ecologically relevant levels of simulated UVA radiation on sperm quality and sexual ornamentation in three-spined sticklebacks (Gasterosteusaculeatus). Males were assigned to three spectral exposure treatments differing in the UV spectral part so that they received either enhanced, moderate or no UVA radiation. The results reveal that exposure to enhanced ambient UVA levels had detrimental effects on both male breeding coloration and sperm velocity providing evidence that UVR affects traits targeted by pre- and post-copulatory sexual selection. By highlighting the role of UVA as a factor influencing fitness-relevant traits, our findings may contribute to a better understanding of the consequences of current and future levels of solar UVR for mating systems and life history.