Chitosan is a cationic polysaccharide that is primarily derived from chitin, a natural polymer of N‐acetyl glucosamine mainly found in crustacean, insect exoskeletons and fungal cell walls, by exhaustive alkaline deacetylation to varying degrees. Chitosan has been found to have many favourable biological properties including biosafety, biodegradability and biocompatibility. These advantages make it a very promising material for diverse applications. For terrestrial animals, chitosan has been widely used as a feed additive because of its low side effects, enhancing the growth performance, improving immune functions, inhibition intestinal microbial pathogens and lowering cholesterol. Recently, it has been used as a feed additive in fish diets. Moreover, chitosan has gained an attention as an effective agent in aquaculture water treatment. A number of studies have been conducted on the effectiveness of the use of chitosan in aquaculture. Thus, the present review explored the current state of knowledge on the effects of dietary chitosan on farmed aquatic animals including antimicrobial, growth promoting, antioxidant activity and immunostimulation effects, with a particular emphasis on the optimal dose of chitosan. As well as, this review pointed out the possibility of using chitosan in aquaculture water treatment. According to the studies that were discussed in this review, chitosan is considered as a promising material with a massive potential of applications in aquaculture.

中文翻译：

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日粮壳聚糖的添加对养殖鱼类的影响；回顾

壳聚糖是一种阳离子多糖，主要衍生自几丁质。几丁质是一种N-乙酰氨基葡糖的天然聚合物，主要通过各种程度的碱性脱乙酰作用而存在于甲壳类动物，昆虫外骨骼和真菌细胞壁中。已经发现壳聚糖具有许多有利的生物学特性，包括生物安全性，生物降解性和生物相容性。这些优点使其成为用于各种应用的非常有前途的材料。对于陆生动物，壳聚糖因其低副作用，增强生长性能，改善免疫功能，抑制肠道微生物病原体和降低胆固醇而被广泛用作饲料添加剂。最近，它已被用作鱼饲料中的饲料添加剂。此外，壳聚糖作为水产养殖水处理中的有效试剂已受到关注。关于在水产养殖中使用壳聚糖的有效性已经进行了许多研究。因此，本综述探讨了饮食中壳聚糖对养殖水生动物的影响的当前知识水平，包括抗菌，促进生长，抗氧化活性和免疫刺激作用，特别强调了壳聚糖的最佳剂量。而且，该评论指出了在水产养殖用水中使用壳聚糖的可能性。根据这篇综述中讨论的研究，壳聚糖被认为是一种有前途的材料，在水产养殖中具有巨大的应用潜力。本综述探讨了饮食中壳聚糖对养殖水生动物的影响的当前知识水平，包括抗菌，促进生长，抗氧化活性和免疫刺激作用，特别强调了壳聚糖的最佳剂量。而且，该评论指出了在水产养殖用水中使用壳聚糖的可能性。根据这篇综述中讨论的研究，壳聚糖被认为是一种有前途的材料，在水产养殖中具有巨大的应用潜力。本综述探讨了饮食中壳聚糖对养殖水生动物的影响的当前知识水平，包括抗菌，促进生长，抗氧化活性和免疫刺激作用，特别强调了壳聚糖的最佳剂量。而且，该评论指出了在水产养殖用水中使用壳聚糖的可能性。根据这篇综述中讨论的研究，壳聚糖被认为是一种有前途的材料，在水产养殖中具有巨大的应用潜力。