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Can a marine pest reduce the nutritional value of Mediterranean fish flesh?

机译：海洋有害生物会降低地中海鱼肉的营养价值吗？

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Biological invasions are deemed as one of the most severe threats to biodiversity and can result in huge economic impacts on natural resources. Many studies have assessed structural changes caused by the introduction of nonindigenous species, but urgent questions remain to be answered about the complex indirect effects of invasive pests on marine biodiversity at the species and ecosystem level. Previous investigations focusing on the biological invasion by Caulerpa racemosa in the Mediterranean indicated that the lipophilic algal metabolite caulerpin accumulates in the tissues of the native edible white sea bream Diplodus sargus feeding on the exotic alga. The level of caulerpin in D. sargus has been thus used as an indicator of the trophic exposure of the fish to the seaweed and related with adverse effects on the fish health. In the present study, we show that the C. racemosa-based diet can also alter muscle fatty acids composition in the white sea bream by reducing the percentage of polyunsaturated fatty acids of the n-3 and n-6 series, such as eicosapentaenoic (C20:5), docosahexaenoic (C22:6) and arachidonic acids (C20:4). This represents both a real threat to the health of fish unable to biosynthesize these essential fatty acids and an impoverishment of an important source of essential fatty acids for human nutrition, which helps to prevent cardiovascular diseases, diabetes, hepatic steatosis, cancer and neurological disorders. On the whole, this work sheds light on an unexplored and critical aspect of biological invasions with implication on the health of both humans and the environment.
机译：生物入侵被认为是对生物多样性的最严重威胁之一，并可能对自然资源造成巨大的经济影响。许多研究已经评估了由于引入非本地物种而引起的结构变化，但是关于入侵性有害生物对物种和生态系统一级海洋生物多样性的复杂间接影响仍有待解决的紧迫问题。先前的研究主要集中在地中海地中海小菜蛾的生物入侵，表明亲脂性藻类代谢物菜菜碱会积聚在以可食藻类为食的天然可食白鲷石龙的组织中。因此，D。sargus中的菜籽素水平已被用作鱼对海藻营养暴露的指标，并与对鱼类健康的不利影响有关。在本研究中，我们表明，基于消旋衣藻的饮食还可以通过减少n-3和n-6系列的多不饱和脂肪酸（如二十碳五烯酸（ C20：5），二十二碳六烯酸（C22：6）和花生四烯酸（C20：4）。这既代表着无法生物合成这些必需脂肪酸的鱼类健康的真正威胁，也代表着人类营养必需脂肪酸的重要来源贫乏，这有助于预防心血管疾病，糖尿病，肝脂肪变性，癌症和神经系统疾病。总体而言，这项工作揭示了生物入侵的一个未探索和关键的方面，对人类和环境的健康都有影响。

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  • 来源
    《Marine biology》 |2014年第6期|1275-1283|共9页
  • 作者

    Serena Felline; Ernesto Mollo; Alessandra Ferramosca; Vincenzo Zara; Francesco Regoli; Stefania Gorbi; Antonio Terlizzi;

  • 作者单位

    Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Universita del Salento, CoNISMa, Lecce, Italy;

    Istituto di Chimica Biomolecolare, CNR, Pozzuoli, Napoli, Italy;

    Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Universita del Salento, CoNISMa, Lecce, Italy;

    Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Universita del Salento, CoNISMa, Lecce, Italy;

    Dipartimento di Scienze della Vita e dell'Ambiente, Universita Politecnica delle Marche, CoNISMa, Ancona, Italy;

    Dipartimento di Scienze della Vita e dell'Ambiente, Universita Politecnica delle Marche, CoNISMa, Ancona, Italy;

    Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Universita del Salento, CoNISMa, Lecce, Italy;

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