母亲转移的卵对山地白鱼 (Prosopium williamsoni) 胚胎幼虫生存,生长和发育的影响
Kevin V Brix1, Josh Baker2, Adrian de Bruyn3
1EcoTox, Miami, FL, USA.
Environmental toxicology and chemistry
|April 23, 2025
概括
山地白鱼对 (Se) 的敏感性比以前认为的要小. 卵子Se度没有显著影响生存,但可能会影响生长,尽管孕产妇供给是可能的原因.
科学领域:
- 环境毒理学环境毒理学
- 水生生态学 水生生态学
- 生态毒理学 生态毒理学
背景情况:
- 采矿产生的 (Se) 度升高可能会影响水生生物.
- 山地白鱼 (Prosopium williamsoni) 之前没有对Se的敏感性进行评估.
- 母亲将Se转移到卵子是生命早期暴露的关键途径.
研究的目的:
- 评估母体转移卵对山地白鱼生存,生长和发育的影响.
- 为了确定山地白鱼的Se敏感度值.
- 为了比较山地白鱼Se对通用指南的敏感性.
主要方法:
- 收集了来自不列颠哥伦比亚省65只雌性山地白鱼的蛋,蛋度各不相同 (15.554.0毫克/公斤-1干重).
- 在实验室中培养受精卵,通过游泳后的阶段.
- 评估了幼虫的生存时间,长度,体重以及形和的发生率.
主要成果:
- 胚胎-幼虫变形的EC10为>54毫克/公斤-1个干重蛋Se.
- 观察到幼虫生长 (长度,重量) 和蛋Se度之间存在统计学上显著但浅的线性关系.
- 增长的EC10估计为34毫克/公斤-1干重,但由于未定义的效果极限和潜在的孕产妇储备效应,因此不确定.
结论:
- 山地白鱼似乎对的敏感性低于通用指导方针的建议.
- 虽然不能排除Se对生长的影响,但以大小为依赖的孕产妇供给是观察到的生长关系的更有可能解释.
- 在测试蛋的Se度上没有观察到变形,这表明耐受性水平很高.
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