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首页> 外文期刊>Marine biology >Essential fatty acids influence metabolic rate and tolerance of hypoxia in Dover sole (Solea soled) larvae and juveniles
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Essential fatty acids influence metabolic rate and tolerance of hypoxia in Dover sole (Solea soled) larvae and juveniles

机译：必需脂肪酸影响多佛唯一（Solea腌制）幼虫和幼虫的代谢率和耐缺氧性

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Dover sole (Solea solea, Linneaus 1758) were raised from first feeding on brine shrimp (Artemia sp.) with different contents and compositions of the essential fatty acids (EFA) arachidonic acid (ARA, 20:4n - 6); eicosa-pentaenoic acid (EPA, 20:5n - 3), and docosahexaenoic acid (DHA, 22:6n - 3), and their metabolic rate and tolerance to hypoxia measured prior to and following metamorphosis and settlement. Four dietary Artemia preparations were compared: (1) un-enriched; (2) enriched with a commercial EFA mixture (Easy DHA SELCO Emulsion); (3) enriched with a marine fish oil combination (VEVODAR and Incromega DHA) to provide a high ratio of ARA to DHA, and (4) enriched with these fish oils to provide a low ratio of ARA to DHA. Sole fed un-enriched Artemia were significantly less tolerant to hypoxia than the other dietary groups. Larvae from this group had significantly higher routine metabolic rate (RMR) in normoxia, and significantly higher O_2 partial pressure (PO_2) thresholds in progressive hypoxia for their regulation of RMR (P_(crit)) and for the onset of agitation, respiratory distress and loss of equilibrium. Metamorphosis was associated with an overall decline in RMR and increase in P_(crit), but juveniles fed on un-enriched Artemia still exhibited higher P_(crit) and agitation thresholds than the other groups. Sole fed un-enriched Artemia had significantly lower contents of EFA in their tissues, both before and after settlement. Thus, enriching live feeds with EFA has significant effects on the respiratory physiology of sole early life stages and improves their in vivo tolerance to hypoxia. We found no evidence, however, for any effect of the ratio of ARA to DHA.
机译：多佛鞋底（Solea solea，Linneaus 1758）是从第一次饲喂不同含量和组成的必需脂肪酸花生四烯酸（ARA，20：4n-6）的盐水虾（Artemia sp。）时饲养的；二十碳五烯酸（EPA，20：5n-3）和二十二碳六烯酸（DHA，22：6n-3），以及它们在变态和沉降之前和之后的代谢率和对缺氧的耐受性。比较了四种饮食中的卤虫制剂：（1）未富集； （2）富含商业EFA混合物（Easy DHA SELCO乳液）； （3）富含海洋鱼油组合（VEVODAR和Incromega DHA）以提供较高的ARA与DHA比例，以及（4）富含这些鱼油以提供较低的ARA与DHA比例。单独喂食未富集的卤虫比其他饮食组对缺氧的耐受性明显差。该组幼虫在正常氧状态下的常规代谢率（RMR）显着较高，在进行性低氧状态下对RMR（P_（crit））的调节以及躁动发作，呼吸窘迫和呼吸暂停的O_2分压（PO_2）阈值显着更高。失去平衡。变态与RMR的总体下降和P_（crit）的升高有关，但是以未富集的卤虫为食的未成年人仍表现出较高的P_（crit）和激动阈值。单独喂食未富集的卤虫在沉降之前和之后其组织中的EFA含量均显着降低。因此，用EFA丰富活饲料对单独生命早期的呼吸生理具有显着影响，并提高了其体内对缺氧的耐受性。但是，我们没有发现ARA与DHA的比例有任何影响的证据。

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