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在海洋顶峰捕食者中积累的生态驱动因素:人类消费咨询意见
Felipe A de Alencar Goyanna1, Moisés Fernandes Bezerra2, Guelson Batista da Silva3
1Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. Abolição 3207, Meireles, Fortaleza 60.165-081, CE, Brazil.
The Science of the total environment
|March 5, 2025
概括
在西赤道大西洋的大型捕食鱼中发现了高 (Hg) 水平. 提供了消费建议,其中一些物种由于生物积累和生物放大而不能正常消费.
科学领域:
- 海洋生物学 海洋生物学
- 环境化学环境化学
- 生态毒理学 生态毒理学
背景情况:
- (Hg) 是一种持续存在的环境污染物.
- 高摄取量级的海底鱼类和鱼通过饮食积累Hg.
- 了解的生物积累和生物放大对生态系统和人类健康至关重要.
研究的目的:
- 为了评估Hg度和稳定同位素 (δ15N和δ13C) 在关键的海底鱼类物种中.
- 为了确定西赤道大西洋食物网中的Hg生物积累和生物放大动态.
- 为人类人口提供安全的海鲜消费建议.
主要方法:
- 在肌肉组织中分析总 (Hg) 度.
- 稳定同位素分析 (δ15N和δ13C) 来评估热带位置.
- 对Hg水平,鱼的体重和热量标志物之间的相关性分析.
- 计算甲基比例和安全消耗极限.
主要成果:
- 种类之间Hg度的显著变化,在马科 (Isurus oxyrinchus) 和剑鱼 (Xiphias gladius) 中的度最高.
- 在一些物种中,甲基占总的80%以上.
- 稳定的同位素证实了高的热量水平,相关性表明Hg生物放大.
- 安全消费的限制范围为每月0到11餐,具体取决于物种和年龄组.
结论:
- 在西赤道大西洋的捕食鱼表现出高Hg负荷.
- 生物积累和生物放大是这种食物网中Hg水平的重要驱动因素.
- 对特定物种的建议是必要的,以最大限度地减少因食用污染的海鲜造成的人类健康风险.
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