食行为和年龄会影响的母体转移到北方海大象幼
Sarah H Peterson1,2,3, Michael G Peterson4, Joshua T Ackerman5
1Western Ecological Research Center, Dixon Field Station, U.S. Geological Survey, 800 Business Park Drive Suite D, Dixon, CA, USA. sepeterson@usgs.gov.
Scientific reports
|February 26, 2024
概括
北方象海母从深海猎物转移到幼中. 幼中的高含量表明潜在的健康风险,并将海与北太平洋中性食物网污染联系起来.
科学领域:
- 海洋生物学 海洋生物学
- 生态毒理学 生态毒理学
- 保护科学 保护科学
背景情况:
- 北方海象在北太平洋的深水中寻找食物,食用鱼和鱼.
- 成年雌性通过怀孕和哺乳期将生物积累的污染物,包括,传递给幼.
- 半层性食物网是污染物转移到海洋哺乳动物的重要途径.
研究的目的:
- 为了研究从成年雌性北方海象海到它们的幼的转移.
- 为了将母体的污染和食行为与幼的水平相关联.
- 评估海幼对健康的潜在风险,以及对更广泛的半生态系统的影响.
主要方法:
- 在幼中度的分析lanugo (在子宫毛发).
- 利用生物遥测和稳定同位素分析来追踪母亲的食行为和饮食.
- 根据母体食地点,深度和个体母体病史,比较幼中的含量.
主要成果:
- 幼的度是年轻足动物中记录的最高度之一 (几何平均值为23.01μg/g dw).
- 孕产妇的水平和深水食行为与幼的度较高有很强的相关性.
- 同一雌性连续的幼中的含量始终很高,表明了可预测的暴露模式.
结论:
- 北方海大象在深海生态系统中作为有效的生物哨兵,防止污染.
- 北太平洋中性食物网中的对开发海幼和其他捕食者构成潜在风险.
- 母亲的食策略显著影响胎儿暴露和后代的潜在健康结果.
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