ABSTRACT: Recent studies have shown that the Mediterranean white sea bream Diplodus sargus includes the invasive green alga Caulerpa cylindracea in its diet, with consequent metabolic and enzymatic alterations. As a result of this novel alimentary habit, the bioactive algal red pigment caulerpin has been detected in its tissues. However, this may not be an isolated case: other fish species have also been reported to feed on C. cylindracea, although the possible accumulation of caulerpin in their tissues has not yet been investigated. In this report, we analysed stomach contents and caulerpin levels in the native sparid species Spondyliosoma cantharus, Sarpa salpa, and Diplodus vulgaris, and in the scarid Sparisoma cretense, along with the Lessepsian siganid Siganus luridus. C. cylindracea was found in the stomachs of all but one fish species, the exception being S. cretense, in which prey items could not be determined due to the high degree of digestion. Chemical analysis of fish tissues revealed that only S. cantharus and S. salpa accumulated caulerpin, while no traces of the compound were detected in the other species. Despite intense research efforts on natural products obtained from C. cylindracea, a complete picture of the impacts caused by fish including this alga in their diet has not been elucidated. The identification of caulerpin in other Mediterranean native fish suggests a need for further research in order to assess the possible transfer of such molecules to humans through seafood consumption.

中文翻译：

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入侵地中海地中海鱼类中Caulerpa cylindracea中caulerpin积累的初步观察

摘要：最近的研究表明，地中海白鲷Diplodus sargus的饮食中含有侵入性绿藻Caulerpa cylindracea，因此会引起代谢和酶促改变。由于这种新的饮食习惯，已在其组织中检测到了具有生物活性的藻红色颜料caulerpin。但是，这可能不是一个孤立的案例：虽然尚未研究过其他物种的鱼类以C. cindindacea为食，但尚未研究过卡立平在其组织中的可能积累。在此报告中，我们分析了本地西班牙spa物种Spondyliosoma cantharus，Sarpa salpa和Diplodus vulgaris的胃内容物和caulerpin水平，并在scarid异齿鹦鲷，随着Lessepsian siganid蓝子luridus。除一种鱼类外，在其他所有鱼类的胃中都发现有C. cindindracea，因为其高消化率无法确定猎物。鱼组织的化学分析表明，仅食蟹沙门氏菌和S. salpa积累了卡勒平，而在其他物种中未发现该化合物的痕迹。尽管对从C. cylindracea获得的天然产物进行了深入的研究，，尚未阐明包括藻类在内的鱼类对鱼类造成的影响的完整情况。在其他地中海本地鱼类中对卡来平的鉴定表明，有必要进行进一步研究，以评估通过食用海鲜将此类分子转移给人类的可能性。