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首页> 外文期刊>Marine biology >An experimental study of the effect of diet on the fatty acid profiles of the European Cuttlefish (Sepia officinalis)
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An experimental study of the effect of diet on the fatty acid profiles of the European Cuttlefish (Sepia officinalis)

机译：饮食对欧洲墨鱼（Sepia officinalis）脂肪酸谱影响的实验研究

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Fatty acid analysis is an alternative dietary investigation tool that complements the more traditional techniques of stomach content and faecal analysis that are often subject to a wide range of biases. In applying fatty acid analysis to ecosystem studies, it is important to have an understanding of the effect diet has on the fatty acid profile of the predator. A feeding experiment, using crustacean and fish as prey for the European cuttlefish Sepia officinalis, was conducted to evaluate the effect of prey fatty acids on the fatty acid profile of this marine predator. Cuttlefish were fed on a fish diet for the first 29 days, and then changed to a crustacean diet for a further 28 days. Another group of cuttlefish was fed on a crustacean diet for the first 29 days, and then changed to a fish diet for a further 28 days. An analysis of the cuttlefish digestive gland showed that the fatty acid profile reflected that of the prey, with cuttlefish on a crustacean diet being clearly distinguishable from the cuttlefish on a fish diet. Cuttlefish fed on a fish diet for 29 days prior to the switch in diet were comparatively higher in 16:0, AA, 20:lω9, DPA6, DHA, 22:4ω6 and DP A3 than those fed on crustaceans. Cuttlefish fed on a crustacean diet for 29 days prior to the switch in diet were comparatively higher in 17:lω8,18:lω9, 18:2ω6, 18:lω7, EPA and 20:2ω6 than those fed on fish. Following a change in diet, the fatty acid profile of the cuttlefish digestive gland reflected that of the new diet within 14 days. The results confirm that the fatty acid profile of the cuttlefish digestive gland clearly reflects the profile of its recent diet. It also shows that the digestive gland may not be an organ that accumulates dietary lipids for long-term storage, but rather is an organ where lipids are rapidly being turned over and potentially excreted.
机译：脂肪酸分析是一种替代性的饮食调查工具，可补充传统的胃液含量和粪便分析技术，这些技术通常会产生广泛的偏差。在将脂肪酸分析应用于生态系统研究中，重要的是要了解饮食对捕食者脂肪酸谱的影响。进行了以甲壳类动物和鱼类作为欧洲墨鱼乌贼墨的猎物的饲养实验，以评估猎物脂肪酸对该海洋捕食者脂肪酸谱的影响。在开始的29天中，乌贼以鱼饲料为食，然后在28天中改为甲壳类。在头29天中，另一组墨鱼以甲壳类饮食为食，然后在另外28天中改为鱼类饮食。对乌贼消化腺的分析表明，脂肪酸特征反映了猎物的脂肪酸特征，甲壳类饮食中的乌贼与鱼类饮食中的乌贼明显不同。在转换饮食之前以鱼饲料喂养了29天的乌贼比以甲壳类动物喂养的乌贼在16：0，AA，20：lω9，DPA6，DHA，22：4ω6和DP A3中相对较高。在转换饮食之前以甲壳类饮食喂养29天的乌贼比以鱼类喂养的乌贼的17：lω8、18：lω9、18：2ω6、18：lω7，EPA和20：2ω6相对较高。饮食改变后，乌贼消化腺的脂肪酸特征在14天内反映出新饮食的特征。结果证实了墨鱼消化腺的脂肪酸特征清楚地反映了其近期饮食的特征。它还表明，消化腺可能不是蓄积饮食脂质以长期保存的器官，而是脂质迅速被转移并可能被排泄的器官。

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