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Fate of domoic acid ingested by the copepod Acartia clausi

机译：pe足纲A虫摄取的海藻酸的命运

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Two important issues in the studies of harmful algae include ecological role of the toxic compounds and their fate through the food web. The aims of this study were to determine whether the production of domoic acid is a strategy evolved to avoid predation and the role of copepods in the fate of this toxic compound through the food web. The copepod Acartia clausi was fed with single and mixed cultures of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschia delicatissima. Ingestion rate as a function of diatom abundance was the same for the toxic and non-toxic Pseudo-nitzschia species, indicating no selective feeding behaviour against P. multiseries. The toxins ingested by the copepods did not affect mortality, feeding behaviour, egg production and egg hatching of the copepods. Copepods assimilated the 4.8% of the total domoic acid ingested. Although the amount of toxins daily detoxincated by the copepods was 63.6%, the copepods accumulated domoic acid in their tissues. We conclude that domoic acid is not toxic for copepods and, probably for this reason, this toxin does not act as feeding deterrent for copepods. However, even though the production of domoic acid has apparently not evolved to deter predation, copepods may play an important role on the fate of this toxic compound through the marine food web.
机译：有害藻类研究中的两个重要问题包括有毒化合物的生态作用及其通过食物网的命运。这项研究的目的是确定是否产生海藻酸是一种避免捕食的进化策略，以及co足类动物通过食物网在这种有毒化合物的命运中的作用。 pe足纲A足类动物被喂食有毒硅藻多假单胞菌和无毒硅藻假单胞菌的单一和混合培养物。对于有毒和无毒的拟南芥属物种，摄食率随硅藻丰度的变化是相同的，这表明对多系列疟原虫没有选择性摄食行为。 co足类动物摄入的毒素不会影响mortality足类动物的死亡率，摄食行为，产卵量和卵孵化率。 pe足类吸收了所摄取的全部海藻酸的4.8％。尽管daily足类动物每天排毒的毒素量为63.6％，但co足类动物在其组织中积累了多摩酸。我们得出的结论是，海藻酸对co足类没有毒性，并且可能由于这个原因，这种毒素不能作为as足类的摄食威慑物。然而，即使海藻酸的产生显然不能发展为能阻止捕食，,足类动物也可能通过海洋食物网对这种有毒化合物的命运起重要作用。

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