Abstract

The present study is aimed to investigate the effects of iron nanoparticles (Fe-NPs) on growth performance, liver histopathology and some blood parameters of the stellate sturgeon (Acipenser stellatus) juvenile. A total of 144 fish (182.09 ± 9.05 g) were fed diets containing graded levels of Fe-NPs (0, 25, 50, and 100 mg kg^–1 diet) for 8 weeks. No significant differences were observed in weight gain, body weight increases, specific growth rate, feed conversion ratio, mean cell volume, mean cell hemoglobin, mean cell hemoglobin concentration, eosinophils, monocytes, albumin, alanine aminotransferase, aspartate aminotransferase and lysozyme activity between treatments (P > 0.05). The group fed 50 mg kg^–1 Fe-NPs showed a significant difference in the contents of red and white blood cells, neutrophils, and total protein, in respiratory burst activity, and total immunoglobulin level (P < 0.05); the diet caused the least negative effect on the fish liver. After 8 weeks, survival rates of 76.67, 90.00, and 93.33% were recorded in groups that received 25, 50, and 100 mg kg^–1 Fe-NPs of feed, respectively, compared to 66.67% survivals in the control. These results indicated that Fe-NPs at a level of 50 mg kg^–1 improved the welfare and survival of stellate sturgeon juveniles and had no negative effect on the fish liver.

中文翻译：

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纳米铁作为饲料添加剂对星状urge鱼生长性能，成活率，血液参数和免疫功能的影响

摘要

本研究旨在研究铁纳米颗粒（Fe-NPs）对星状st鱼（Acipenser stellatus）少年的生长性能，肝脏组织病理学和某些血液参数的影响。总共144条鱼（182.09±9.05 g）饲喂含有分级的Fe-NPs的饲料（0、25、50和100 mg kg ^-1饲料），持续8周。在治疗之间，体重增加，体重增加，比生长速率，饲料转化率，平均细胞体积，平均细胞血红蛋白，平均细胞血红蛋白浓度，嗜酸性粒细胞，单核细胞，白蛋白，丙氨酸氨基转移酶，天冬氨酸氨基转移酶和溶菌酶活性没有观察到显着差异。 （P > 0.05）。该组喂食50 mg kg ^–1Fe-NPs在红细胞和白细胞，嗜中性粒细胞和总蛋白质，呼吸爆发活性和总免疫球蛋白水平方面显示出显着差异（P <0.05）；饮食对鱼肝的负面影响最小。8周后，分别接受25、50和100 mg kg ^–1 Fe-NPs饲料的组的存活率分别为76.67％，90.00和93.33％，而对照组的存活率为66.67％。这些结果表明，Fe-NPs含量为50 mg kg ^{-1时，可以}改善星状st鱼幼鱼的福利和存活率，并且对鱼肝没有负面影响。