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Impact of the partial replacement of fish meal with a chloroplast rich fraction on the growth and selected nutrient profile of zebrafish (Danio rerio)
Food & Function ( IF 6.1 ) Pub Date : 2019-01-15 00:00:00 , DOI: 10.1039/c8fo02109k
Mohamed A. Gedi 1, 2, 3, 4, 5 , Kieran J. Magee 5, 6, 7 , Randa Darwish 1, 2, 3, 4, 5 , Patchaniya Eakpetch 1, 2, 3, 4, 5 , Iain Young 5, 6, 7 , David A. Gray 1, 2, 3, 4, 5
Affiliation  

Increasing global aquaculture production, is putting pressure on fishmeal and fish oil supply. There is therefore a growing search for more sustainable sources of proteins and polyunsaturated fatty acids as fish feed ingredients. Chloroplasts are the organelles in the leaves of plants where many of the valuable nutrients, fatty acids (FAs), amino acids, vitamins and pigments, are synthesised. Chloroplasts could be incorporated into fish diets either retained in, or liberated from, plant cells. In this study zebrafish were fed with seven different diets individually; fish were fed with diets reducing fishmeal levels (10, 20 or 50%) using either spinach leaf powder (SLP) or a chloroplast rich fraction (CRF) prepared by an established method to recover chloroplasts. Both SLP and CRF had a positive impact on the growth, taste response, whole fish FA composition, and carotenoid profile. Fish fed with CRF diets showed significantly (P ≤ 0.05) greater α-linolenic (C18:3 n-3) and hexadecatrienoic (C16:3) acid contents than those of SLP and the control. Hexadecanoic acid (C16:3) is a unique FA in the galactolipids of the chloroplast; its presence in zebrafish tissues proves that zebrafish digest and absorb chloroplast galactolipids. The lutein profile of eggs produced by zebrafish fed with the CRF diet was significantly (P ≤ 0.05) higher than those of SLP and the control. Alterations in egg colour were also noted, warranting further investigations of the diet impact on fish fecundity, embryo fertility, hatch rate and larval survival.

中文翻译:

用富含叶绿体的部分代替鱼粉对斑马鱼(Danio rerio) 的生长和选定营养成分的影响

全球水产养殖产量的增加,对鱼粉和鱼油供应构成压力。因此,人们越来越寻求蛋白质和多不饱和脂肪酸作为鱼饲料成分的更可持续的来源。叶绿体是植物叶片中的细胞器,许多有价值的营养素,脂肪酸(FAs),氨基酸,维生素和色素被合成。叶绿体可以掺入鱼类的食物中,或者保留在植物细胞中或从植物细胞中释放出来。在这项研究中,斑马鱼分别饲喂了七种不同的饮食。用菠菜叶粉(SLP)或富含叶绿体的级分(CRF)饲喂降低鱼粉含量(10%,20%或50%)的鱼饲料,方法是通过既定方法制备以回收叶绿体。SLP和CRF均对生长,味觉响应,整个鱼的FA成分和类胡萝卜素轮廓。饲喂CRF饲料的鱼表现出明显的(P ≤0.05)更大的α亚麻酸(C18:3的n-3)和十六碳(C16:3)酸含量高于SLP和控制的。十六烷酸(C16:3)是叶绿体半乳糖脂中的独特FA。它在斑马鱼组织中的存在证明了斑马鱼消化并吸收了叶绿体半乳糖脂。通过斑马鱼与CRF饮食喂养产蛋的叶黄素分布为显著(P ≤0.05)比SLP和对照的高。还注意到鸡蛋颜色的变化,需要进一步研究饮食对鱼类繁殖力,胚胎繁殖力,孵化率和幼虫存活率的影响。
更新日期:2019-01-15
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