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Lei Yanju Zhang Wenbing Xu Wei Zhang Yanjiao Zhou Huihui Mai Kangsen 《中国海洋大学学报(英文版)》2015,14(3):511-521
The aim of this study was to compare the effects of waterborne copper(Cu) and cadmium(Cd) on survival, anti-oxidative response, lipid peroxidation and metal accumulation in abalone Haliotis discus hannai. Experimental animals(initial weight: 7.49 g ± 0.01 g) were exposed to graded concentrations of waterborne Cu(0.02, 0.04, 0.06, 0.08 mg L-1) or Cd(0.025, 0.05, 0.25, 0.5mg L-1) for 28 days, respectively. Activities of the anti-oxidative enzymes(catalase, CAT; superoxide dismutase, SOD; glutathione peroxidases, GPx; glutathione S-transferase, GST), contents of the reduced glutathione(GSH) and malondiadehyde(MDA) in the hepatopancreas, and metal accumulation in hepatopancreas and muscles were analyzed after 0, 1, 3, 6, 10, 15, 21, 28 days of metal exposure, respectively. Results showed that 0.04 mg L-1, 0.06 mg L-1 and 0.08 mg L-1 Cu caused 100% death of abalone on the 21 st, 10 th and 6th day, respectively. However, no dead abalone was found during the 28-day waterborne Cd exposure at all experimental concentrations. Generally, activities of SOD and GST in hepatopancreas under all Cu concentrations followed a decrease trend as the exposure time prolonged. However, these activities were firstly increased and then decreased to the control level and increased again during Cd exposure. Activities of CAT in all Cu exposure treatments were higher than those in the control. These activities were firstly increased and then decreased to the control level and increased again during Cd exposure. Contents of MDA in hepatopancreas in all Cu treatments significantly increased first and then decreased to the control level. However, the MDA contents in hepatopancreas were not significantly changed during the 28-day Cd exposure. The metals accumulation in both hepatopancreas and muscles of abalone significantly increased with the increase of waterborne metals concentration and exposure time. These results indicated that H. discus hannai has a positive anti-oxidative defense against Cu or Cd. In conclusion, anti-oxidative mechanism in abalone to resist waterborne Cu did not follow the same pattern as that for waterborne Cd. 相似文献
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以灭活的嗜水气单胞菌（Aeromonas hydrophila）脂多糖和绣球菌（Sparasis crispa）多糖作为免疫增强剂，对接种免疫后的泥鳅（Misgurnus anguillicaudatus）进行抗氧化性能、免疫功能及消化功能等指标进行测定。结果表明：嗜水气单胞菌脂多糖和绣球菌多糖不仅可以提高泥鳅的抗氧化性能和免疫功能，而且可以增强泥鳅的消化功能，质量浓度为1g／L的灭活嗜水气单胞菌脂多糖和9g／L的绣球菌多糖对泥鳅的作用效果较明显，能较明显地提高泥鳅抗氧化性能、免疫功能及消化功能，与注射灭活的嗜水气单胞菌脂多糖相比，9g／L绣球菌多糖对泥鳅的作用时间更持久。 相似文献
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以初始体质量为(5.49±0.01)g的大菱鲆幼鱼为实验对象,探讨饲料中过量添加晶体蛋氨酸或蛋氨酸羟基类似物对大菱鲆生长、饲料利用和抗氧化反应的影响.以白鱼粉和豆粕为主要蛋白源,饲料中同时添加0.25％ DL-蛋氨酸和0.3％蛋氨酸羟基类似物钙盐(MHA)作为对照,在此基础上分别添加0.5％ DL-蛋氨酸、1.25％ DL-蛋氨酸、0.59％MHA、1.49％ MHA、1.25％ DL-蛋氨酸+0.85％柠檬酸钙,配制出6种实验饲料,使饲料中蛋氨酸和蛋氨酸羟基类似物(HMTBA)含量分别是1.35％、1.83％、2.50％、1.45％、1.37％、2.51％和0.22％、0.22％、0.22％、0.63％、1.38％、0.29％.养殖试验在室内流水系统中进行,持续10周,每个处理设5个重复,每个重复放养大菱鲆幼鱼30尾.结果显示,过量添加DL-蛋氨酸和HMTBA对大菱鲆幼鱼生长无显著影响(P＞0.05).过量添加DL-蛋氨酸和HMTBA对大菱鲆体组分、肥满度(CF)、脏体比(VSI)和肝体比(HSI)均无显著影响(P＞0.05),但柠檬酸钙添加组(处理6)体蛋白含量与基础饲料组相比显著降低(P＜0.05).对大菱鲆肝脏过氧化氢酶( CAT)、超氧化物歧化酶(SOD)和肝脏硫代巴比妥酸反应产物量(TBARS)进行测定,各处理组间均无显著性差异(P＞0.05).结果显示,在该实验条件下,过量添加晶体蛋氨酸(1.31～1.73倍)和HMTBA(1.32～1.75倍)对大菱鲆幼鱼的生长、饲料利用和抗氧化反应没有显著影响. 相似文献
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对中国南海侧扁软柳珊瑚(Subergorgia suberosa)乙醇提取物及其石油醚相、乙酸乙酯相、正丁醇相进行了抗氧化和抑菌两种生物活性研究。结果表明:中国南海侧扁软柳珊瑚乙醇提取物及其各萃取相对羟自由基的清除效果好,在50mg/L时清除效率均高于同浓度的合成抗氧化剂TBHQ和BHT;石油醚相、乙酸乙酯相对DPPH自由基和超氧阴离子自由基的清除效率优于正丁醇相和乙醇提取物。另外,对5种海洋细菌、4种陆地细菌进行了抑菌活性测定,发现乙醇提取物及其各萃取相对海洋细菌的最低抑菌浓度(MIC)为100g/L左右,对受试陆地细菌未见抑菌作用。 相似文献
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