发育过程中的盐度波动会影响鱼类的生活史。

IF 3.7 1区 环境科学与生态学 Q1 ECOLOGY
Meng-Han Joseph Chung, Daniel W. A. Noble, Rebecca J. Fox, Lauren M. Harrison, Michael D. Jennions
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引用次数: 0

摘要

气候变化和人类活动正在提高淡水生态系统中盐度的水平和变化。因此,许多水生物种现在经历了更极端的发育环境。由此产生的发育轨迹的变化可能会改变持续到成年期的关键生活史特征。“银汤匙”假说认为,有利的发育条件导致更快的生长、更早的成熟和更大的繁殖成功率。相反,“可预测的适应性反应”假说认为,在有压力的发育条件下,应该选择更快的生长和更早的繁殖,因为压力提供了在未来环境中死亡风险更高的线索。为了了解发育过程中对盐度的生活史反应,我们从出生起就在淡水对照(0‰)、稳定盐(10‰)或波动盐环境(0‰-20‰;平均值= 10‰)直至成熟。然后,我们在一个普通的花园环境中监测了他们成年早期和晚期的表现。与盐度稳定升高的鱼相比,盐度波动的鱼生长得更慢,繁殖量也更少(精子数量更少,卵子更小)。这些差异与提供“银勺”效应的更稳定的环境是一致的。相反,盐度稳定升高的鱼类比淡水中的鱼类生长得更快,成熟得更早,支持“预测性适应反应”,即盐度是触发更快发育和加速繁殖的压力源。此外,盐度的波动改变了高盐度对自我维持的影响。盐度稳定升高导致雄性端粒长度和雌性肠道长度减少,而盐度波动导致雌性肠道长度增加。我们的研究结果表明,在发育过程中,波动和稳定的盐度导致了不同的鱼类生活史。某些性状的效应大小在男性和女性之间存在显著差异,这表明性别对气候波动的反应具有特异性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Fluctuating salinity during development impacts fish life histories

Fluctuating salinity during development impacts fish life histories

Fluctuating salinity during development impacts fish life histories

Fluctuating salinity during development impacts fish life histories

Fluctuating salinity during development impacts fish life histories

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来源期刊
Journal of Animal Ecology
Journal of Animal Ecology 环境科学-动物学
CiteScore
9.10
自引率
4.20%
发文量
188
审稿时长
3 months
期刊介绍: Journal of Animal Ecology publishes the best original research on all aspects of animal ecology, ranging from the molecular to the ecosystem level. These may be field, laboratory and theoretical studies utilising terrestrial, freshwater or marine systems.
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