检查白头污染物暴露和繁殖风险在大湖附属水域的水上方和下方
Carly Jasmine Eakin1, Lisa Williams2, Jeremy Moore3
1US Fish and Wildlife Service, Anchorage, Alaska, USA. carly_eakin@fws.gov.
Archives of environmental contamination and toxicology
|October 16, 2024
概括
拆除水可以改善鱼类的通行,但可能会增加污染物转移. 然而,在这个大湖研究中,白头幼中的污染物水平并没有对它们的繁殖成功产生负面影响.
科学领域:
- 环境毒理学环境毒理学
- 野生动物生态生态学
- 保护生物学 保护生物学
背景情况:
- 大湖支流的水拆除旨在恢复鱼类通道.
- 这可能会增加从鱼类到野生动物的污染物转移.
- 然而,大湖鱼类中的污染物水平最近有所下降.
研究的目的:
- 分析白头幼中的污染物度 (PCB,DDT,PBDE).
- 评估污染物与生殖成功之间的关系.
- 为了确定大对污染物分布和生产力的影响.
主要方法:
- 在密歇根州的水上下收集了白头幼 (1999-2013) 的血样本.
- 测量了多双 (PCB) 和有毒等效物 (TEQ) 的度.
- 从1997年至2018年检查的繁殖成功指标 (巢成功,每个巢中的幼).
主要成果:
- 污染物度 (Σ20PCB,p,p'-DDE) 在平均值以下通常更高.
- 巢成功率和每个巢的幼在水下更高,但位置的影响很小.
- 污染物没有显著预测生殖成功,尽管超过值.
结论:
- 可能会限制头的上游污染物流动.
- 测量到的污染物度并没有影响白头的生产力.
- 需要对人口动态进行进一步的研究,以了解自我可持续性.
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