增加的代谢需求揭示了由可沉大气颗粒物对鱼造成的形态功能影响
C F De Angelis1, M P Soares1, I L Cardoso1
1Department of Physiological Sciences, Federal University of São Carlos, São Carlos, SP, Brazil.
Environmental toxicology and pharmacology
|November 27, 2024
概括
暴露于稳定性大气颗粒物 (SePM) 损害了鱼的状结构和离子平衡. 这会对尼罗河鱼的有氧性能和游泳恢复产生负面影响.
科学领域:
- 环境毒理学环境毒理学
- 水生生理学 水生生理学
- 鱼的健康 鱼的健康
背景情况:
- 大气中的颗粒物对水生生态系统构成环境风险.
- 已知定居大气颗粒物 (SePM) 降低了不活跃鱼类的有氧性能.
- 在有氧压力期间,SePM对鱼形态功能的特定影响尚不清楚.
研究的目的:
- 调查尼罗河鱼中SePM暴露的状形态功能影响.
- 为了在最大有氧游泳力度条件下评估这些影响.
- 了解SePM暴露如何影响运动期间鱼中的离子平衡.
主要方法:
- 尼罗河鱼在96小时内暴露在SePM中.
- 分析了状结构 (上皮线丝厚度,叶片高度,叶片间距离).
- 血离子度 (Na+,Cl-,K+) 被测量在鱼体中进行最大有氧游泳和休息的鱼.
主要成果:
- 暴露于SePM改变了静止鱼的状形态,增加了上皮丝丝的厚度,并减少了叶片高度和叶片间距离.
- 暴露于SePM显著影响了血离子平衡,增加了Cl-和K+,同时减少了Na+.
- 在最大游泳期间,与对照鱼和不活跃的SePM暴露鱼相比,暴露于SePM的鱼表现出进一步的状结构变化和离子干扰.
结论:
- 暴露于SePM会导致尼罗河鱼的状形态功能发生显著的改变.
- 这些变化,特别是在游泳压力下,导致离子失衡,可能会危及生理维护和恢复.
- 研究结果表明,SePM对鱼类在更高的活动水平上表现的能力产生负面影响,这对水生生态系统健康有影响.
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