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Multidimensional trace metals and nutritional niche differ between sexually immature and mature common dolphins (Delphinus delphis)
Environmental Pollution ( IF 8.9 ) Pub Date : 2023-05-30 , DOI: 10.1016/j.envpol.2023.121935
Karen A Stockin 1 , Gabriel E Machovsky-Capuska 2 , Emily I Palmer 3 , Christophe Amiot 4
Affiliation  

There is a need to understand the links between metals and nutrition for apex marine predators, which may be subject to different ecotoxicological effects at different life stages. We combined stomach content analyses (SCA), prey composition analysis (PCA), the Multidimensional Niche Framework (MNNF) with Bayesian multivariate ellipses, trace metal analysis and nicheROVER to investigate nutrition and trace metals across sex, age, and sexual maturity status in common dolphins (Delphinus delphis) from New Zealand. A broader prey composition niche breadth (SEAc) was estimated for immature compared to mature conspecifics, showing a higher degree of prey and nutrient generalism driven by protein (P) intake. Cd and Zn niche similarities suggests these metals were incorporated through similar prey in both immature and mature dolphins, whereas Hg and Se niche divergence indicates uptake occurred via different prey. Our multidisciplinary assessment demonstrated how nutrients and metal interactions differ in common dolphins depending upon sexual maturity. This approach has relevance when considering how marine pollution, environmental fluctuations and climate change may affect nutritional and trace metal interactions during different reproductive stages within marine predators.



中文翻译:

性未成熟和成熟普通海豚(Delphinus delphis)之间的多维微量金属和营养生态位存在差异

有必要了解金属与顶级海洋捕食者营养之间的联系,这些捕食者在不同的生命阶段可能会受到不同的生态毒理学影响。我们将胃内容物分析 (SCA)、猎物成分分析 (PCA)、多维生态位框架 (MNNF) 与贝叶斯多元椭圆、微量金属分析和生态位 ROVER 相结合,以研究跨性别、年龄和性成熟状态的营养和微量金属的共同点来自新西兰的海豚(Delphinus delphis )。与成熟的同种相比,未成熟的猎物组成生态位宽度(SEAc)估计更广泛,显示出由蛋白质(P)摄入驱动的更高程度的猎物和营养通用性。Cd 和 Zn 生态位的相似性表明,这些金属是通过未成熟和成熟海豚中相似的猎物摄入的,而 Hg 和 Se 生态位的差异表明,这些金属是通过不同的猎物吸收的。我们的多学科评估证明了普通海豚的营养和金属相互作用如何根据性成熟度而有所不同。当考虑海洋污染、环境波动和气候变化如何影响海洋捕食者不同繁殖阶段的营养和微量金属相互作用时,这种方法具有相关性。

更新日期:2023-05-30
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