的空间和时间变化在上和下红湖Walleye
Tyler J Orgon1, Andrew W Hafs2, Carl W Isaacson2
1Department of Natural Resources, Water Resources Program, 15761 High School Drive, Red Lake, MN, 56671, USA. tyler.orgon@redlakenation.org.
Ecotoxicology (London, England)
|August 12, 2023
概括
在Walleye (Sander vitreus) 中的含量在上红湖和下红湖之间存在显著差异. 为了维持生计,消费Walleye≤400mm从下红湖以最大限度地减少暴露.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 渔业 科学 渔业 科学
背景情况:
- 是一种普遍存在的全球污染物,通过鱼类消费影响水生生态系统和人类健康.
- 鱼类消费建议是为了减轻与生物积累相关的风险而发布的.
研究的目的:
- 为了调查明尼苏达州上红湖和下红湖的Walleye (Sander vitreus) 的总度.
- 确定影响Walleye含量的关键因素,并提供盆地特定的消费建议.
主要方法:
- 在2019年至2020年期间,从上红湖和下红湖收集和分析了265个Walleye样本 (158610毫米长,年龄016岁).
- 利用统计建模来确定度的预测因素,包括鱼的长度,年龄,性别和湖泊盆地.
主要成果:
- 威利水银度在0.030至0.564毫克/公斤之间 (平均 ± sd:0.179 ± 0.105毫克/公斤).
- 与下红湖 (0.144 ± 0.077 mg/kg) 相比,上红湖 (0.215 ± 0.117 mg/kg) 的度显著更高.
- 鱼的长度,年龄,性别和湖泊盆地是度的重要预测因素.
结论:
- 上红湖和下红湖的不同含量需要单独的管理和监测策略.
- 想要尽量减少摄入量的个人应该从下红湖的较小的Walleye (≤400毫米) 目标.
- 水银度的差异可能归因于湖泊盆地之间的湿地影响,鱼类生长率和物理化学参数的变化.
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