首页> 外文期刊>Fish Physiology and Biochemistry >Physiological characteristics and stress resistance of great sturgeon (Huso huso) juveniles fed with vitamins C, E, and HUFA-enriched Artemia urmiana nauplii
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Physiological characteristics and stress resistance of great sturgeon (Huso huso) juveniles fed with vitamins C, E, and HUFA-enriched Artemia urmiana nauplii

机译:饲喂维生素C,E和富含HUFA的Artemia urmiana nauplii的great鱼(Huso huso)少年的生理特征和抗逆性

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摘要

This study was carried out to examine the effect of Artemia urmiana nauplii enriched with HUFA, and vitamins C and E on stress tolerance, hematocrit, and biochemical parameters of great sturgeon, Huso huso juveniles. Cod liver oil (EPA 18% and DHA 12%), ascorbyl-6-palmitate and alpha-tocopherol acetate were used as lipid, and vitamin C and E sources, respectively. Beluga juveniles at the stage of first feeding (69.7 +/- A 5.9 mg body weight) were randomly divided into five treatments and three tanks were assigned to each diet. All fish groups were fed non-enriched Artemia for the initial 5 days and then fed enriched Artemia for 7 days. Juveniles were fed with Artemia enriched with HUFA + 20% vitamin C (C group); HUFA + 20% vitamin E-enriched Artemia nauplii (E group); HUFA + 20% vitamin C + 20% vitamin E (C and E group); HUFA without vitamins (HUFA) and non-enriched Artemia (control). After the period of enrichment, Juveniles were fed with Daphnia sp. from the 13th to the 40th day. At day 40, the fish were transferred directly from fresh water (0.5 ppt) to brackish water (6 ppt for 4 days and 12 ppt for 2 days) and warm water (from 27 to 33A degrees C) to evaluate juvenile resistance to salinity and thermal shocks. Moreover, all treatments were separately exposed to freshwater in tanks with the same capacity as used for osmotic and thermal tests (as fresh water control). The addition of vitamins C, E, and C + E to HUFA significantly increased fish resistance to 12 ppt salinity and temperature stress tests, whereas survival was not significantly different among challenges at 6 ppt. There was no significant difference in the hematocrit index under stress conditions. Enrichment had significant influence on plasma Na+ level in the C group on the 4th day at 6 ppt. Na+ and Ca2+ concentrations in C, E, and C and E groups on the 1st day at 12 ppt, and Ca2+ level in E group on the 2nd day at 12 ppt were lower than the other groups. The glucose level in the C and C and E groups was lower than the other treatments on the 1st day at 12 ppt and the 2nd day at 33A degrees C. Regardless of Artemia enrichment, plasma ions (Na+, K+, Ca2+, and Mg2+) and glucose concentrations in fish exposed to salinity stress tests were higher than fish in fresh water. Glucose concentration in plasma also increased after 2 days at 33A degrees C. Although most of our results were not significantly different, the use of vitamins C, E, and HUFA in Artemia enrichment can improve Juveniles tolerance under stress conditions, and regardless of enrichment, these data show that beluga juveniles are partly sensitive to high salinity and temperature.
机译:进行了这项研究,以检验富含HUFA的乌木无节幼体以及维生素C和E对great鱼Huso huso幼鱼的胁迫耐受性,血细胞比容和生化参数的影响。鱼肝油(EPA 18%和DHA 12%),抗坏血酸-6-棕榈酸酯和α-生育酚乙酸酯分别用作脂质和维生素C和E的来源。初次喂养阶段的白幼鱼(69.7 +/- 5.9毫克体重)被随机分为五种治疗方法,每种饮食分配三罐。在最初的5天中,所有鱼群都饲喂了非富集的卤虫,然后喂了7天。少年喂以富含HUFA + 20%维生素C的卤虫(C组); HUFA + 20%富含维生素E的无节幼体(E组); HUFA + 20%维生素C + 20%维生素E(C和E组);不含维生素的HUFA(HUFA)和未富集的贫血(对照)。富集一段时间后,给少年喂食水蚤。从13日到40日。在第40天,将鱼直接从淡水(0.5 ppt)转移到微咸水(6 ppt持续4天,12 ppt持续2天)和温水(从27到33A摄氏度)来评估幼鱼对盐分和盐分的抵抗力热冲击。此外,所有处理都分别置于与水箱相同的容量中,该容量与用于渗透和热测试(作为淡水控制)的容量相同。在HUFA中添加维生素C,E和C + E可以显着提高鱼类对12 ppt盐度和温度胁迫测试的抵抗力,而在6 ppt的挑战之间存活率没有显着差异。在压力条件下血细胞比容指数没有显着差异。在第6天,第4天,富集对C组血浆Na +水平有显着影响。 C,E,C和E组的第1天的Na +和Ca2 +浓度为12 ppt,E组的第2天的Ca2 +浓度为12 ppt低于其他组。 C组和C组和E组的葡萄糖水平低于第1天的12 ppt和第2天的33 A摄氏度下的其他治疗。不管是否有大量的贫血,血浆离子(Na +,K +,Ca2 +和Mg2 +)盐度胁迫试验中鱼的葡萄糖浓度高于淡水中的鱼。在33A的温度下放置2天后,血浆中的葡萄糖浓度也有所增加。尽管我们的大多数结果没有显着差异,但在卤虫富集中使用维生素C,E和HUFA可以提高应激条件下的少年耐受性,无论富集情况如何,这些数据表明,白鲸幼体对高盐度和高温敏感。

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