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首页> 外文期刊>Aquaculture Research >Prey-predator dynamics in seahorses (Hippocampus guttulatus): deciphering fatty acid clues.
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Prey-predator dynamics in seahorses (Hippocampus guttulatus): deciphering fatty acid clues.

机译：海马（海马guttulatus）中的捕食者动力学：破译脂肪酸线索。

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摘要

Understanding the flow of fatty acids between trophic levels can provide important clues on prey-predator dynamics and nutritional requirements of the species. This study investigates the fatty acid flow between enrichment emulsions, Artemia nauplii and Hippocampus guttulatus juveniles, and evaluates the nutritional value of enriched and unenriched Artemia for newborn seahorses. The fatty acid profile of Artemia and seahorses generally reflected the dietary composition, but fatty acids were not linearly transferred between trophic levels. The incorporation of dietary fatty acids showed to be a more complex process involving dietary composition, predator metabolism and nutritional requirements. Artemia composition resulted from a dynamic balance between what was assimilated and metabolized by the nauplii during enrichment. Prey fatty acids were incorporated in seahorses, but HUFA, particularly DHA, were selectively retained to fulfil their high requirements. H. guttulatus newborns were not successfully reared on Artemia nauplii, not even on enriched Artemia, with low survival rates (15.0-26.7%) being observed in all feeding treatments. The high MUFA content and low DHA level of Artemia did not fulfil the high SFA and PUFA requirements of newborn juveniles, particularly their great DHA demands. Higher survivorship was obtained with enriched Artemia, but no differences were detected in juvenile growth.
机译：了解营养水平之间的脂肪酸流动可以为捕食者-捕食者的动力学和该物种的营养需求提供重要线索。这项研究调查了富营养乳剂，无节肢无节幼体和海马guttulatus幼鱼之间的脂肪酸流动，并评估了富营养和未富营养型卤虫对新生海马的营养价值。卤虫和海马的脂肪酸概况通常反映了饮食组成，但在营养水平之间脂肪酸并未线性转移。膳食脂肪酸的掺入显示是一个更复杂的过程，涉及膳食组成，捕食者代谢和营养需求。卤虫的组成是由于富营养期间无节幼体被吸收和代谢之间的动态平衡所致。猎物脂肪酸被掺入海马中，但是HUFA，特别是DHA被选择性保留以满足其高要求。 guttulatus新生儿不能在无节状无节肢动物上成功饲养，甚至在丰富的无节律上也没有成功饲养，在所有喂养治疗中均观察到低的存活率（15.0-26.7％）。高MUFA含量和低DHA卤虫不能满足新生儿的高SFA和PUFA要求，尤其是他们对DHA的很高要求。丰富的卤虫获得了更高的存活率，但未发现幼虫生长差异。

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