Zinc-threonine enriched yeast improved the growth and mineral composition of marine rotifer, Brachionus plicatilis

IF 0.8 4区农林科学 Q3 FISHERIES

Iranian Journal of Fisheries Sciences Pub Date : 2020-07-10 DOI:10.22092/IJFS.2018.119688

K. Nematzadeh, N. Ahmadifard, N. Samadi, N. Agh, Serwe Ghaderpoor

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引用次数: 0

Abstract

The survival and larval growth of marine ﬁsh in mass production are affected by the nutritional value of live feeds such as rotifers, thus many studies have been conducted to develop effective methods for the enrichment of live feeds with mineral, essential fatty acids and vitamins. In this study, the effect of zinc-threonine enriched yeast on growth factors and mineral composition of rotifer was investigated. For this purpose, rotifers in four groups including: 1) yeast without enrichment (the control), 2) yeast contain 18.22 mg.g-1 of zinc 3) yeast contain 23.76 mg.g-1 of zinc and 4) yeast contain 46.15 mg.g-1 of zinc were cultured for 10 days. Total rotifer and egg number, on a daily basis were assayed. Mean of specific growth rate and egg ratio of the rotifer B. plicatilis were calculated. Changes in the amount of four element (Zn, Cu, Fe and Mn) of rotifer fed with different treatments were also studied. Based on results, zinc-threonine enriched yeast with 46.15 mg.g-1 of zinc-threonine significantly (P<0.05) improved growth and body composition of rotifers. Maximum number of rotifers and eggs were respectively 219.3±2.0 and 30.3±11.0 number.ml-1. The maximum egg ratio and SGR is related to the treatment of 23.76 mg.g-1 and 46.15 mg/g of zinc, respectively. Highest amount of zinc in treatment 4 was 19.54.73±0.99 mg.g-1 (wet weight of rotifer). Also the amount of Cu in treatment 4 was significantly higher than other groups. Conversely, by increasing zinc content, iron and manganese levels were significantly decreased (P<0.05). In conclusion, zinc-threonine enriched yeast could improve the growth, reproduction and body composition of marine rotifers, Brachionus plicatilis.

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富含锌苏氨酸的酵母改善了褶皱臂尾轮虫的生长和矿物质组成

大规模生产中的海鱼的存活和幼体生长受到活饲料（如轮虫）营养价值的影响，因此已经进行了许多研究，以开发有效的方法来富集矿物质、必需脂肪酸和维生素的活饲料。研究了富含锌苏氨酸的酵母对轮虫生长因子和矿物质组成的影响。为此，将四组轮虫培养10天，包括：1）未富集的酵母（对照），2）含有18.22mg.g-1锌的酵母，3）含有23.76mg.g-1锌的酵母和4）含有46.15mg.g-1的锌的酵母。每天测定轮虫总数和卵数。计算了褶皱轮虫的比生长率和卵率的平均值。研究了不同处理对轮虫体内锌、铜、铁、锰四种元素含量的影响。结果表明，添加46.15mg.g-1锌苏氨酸的富含锌苏氨酸酵母显著改善了轮虫的生长和身体成分（P<0.05）。轮虫和卵的最大数量分别为219.3±2.0和30.3±11.0只。最大卵子比例和SGR分别与23.76毫克/克-1和46.15毫克/克锌的处理有关。处理4的锌含量最高，为19.54.73±0.99mg.g-1（轮虫湿重）。此外，处理4中的Cu含量显著高于其他组。结果表明，锌-苏氨酸富集酵母能改善褶皱臂尾轮虫的生长、繁殖和体成分。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Iranian Journal of Fisheries Sciences FISHERIES-

CiteScore

2.30

自引率

11.10%

发文量

审稿时长

3 months

期刊介绍： 1- Living various species (contains animals and vegetal species) in various aquatic ecosystems. 2- Health and diseases of aquatic species. 3- Determining the stocks and specific time and location for catching and reliable exploitation for sustainable development. 4- Methods of propagation and culture of high value aquatic resources. 5- Aquatic stock assessment and the methods of restocking the high value species and suggestion for rate, areas and the time for releasing fish and other aquatic organisms fries. 6- Pollutant agents and their effects to the environments of aquatic species. 7- Feed and feeding in aquatic organisms. 8- Fish processing and producing new products. 9- The economic and social aspects of fisheries.