Growth and lipid composition of green abalone (Haliotis fulgens Philippi) fed different macroalgae and a seagrass

IF 2.4 3区农林科学 Q2 FISHERIES

Aquaculture International Pub Date : 2025-05-01 DOI:10.1007/s10499-025-01977-y

Elena Palacios-Mechetnov, Angélica Pérez-Juárez, Omar A. López-Verdugo, Olivia Arjona, Alejandra Mazariegos-Villarreal, Elisa Serviere-Zaragoza

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Abstract

Most studies on abalone feeding have focused on protein and total lipid levels. Here, Haliotis fulgens juveniles were fed with four macralgae Ulva lactuca, Eisenia arborea, Macrocystis pyrifera, Gelidium robustum, and a seagrass (Phyllospadix torreyi) for 174 days and lipid composition was analysed in digestive gland and muscle. Better growth for juveniles fed M. pyrifera or E. arborea was observed, and survival was higher for juveniles fed E. arborea. Cholesterol is either synthesized de novo, or transformed from other phytosterols in abalone; several phystosterols were associated with survival. Highly unsaturated fatty acids (HUFA), and particularly docosahexaenoic acid (22:6n-3 or DHA) were found in tissues of juveniles fed E. arborea, that did not contain these HUFA. DHA in muscle phospholipids and several bacteria biomarkers in digestive gland (15:0, 17:0, and branched fatty acids) were negatively associated with growth. Survival was associated with 16:2n-4, a biomarker for diatoms, and iso18:0 a biomarker for mainly gut bacteria. Non-methylene interrupted fatty acids (NMI) were highest in abalone fed U. lactuca, in agreement with the capacity of molluscs to produce NMI when lacking HUFA. Finally, abalone survived for two months without any feed, so feeding experiments should last at least double that time.

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不同大藻类和海草对绿鲍鱼生长和脂质组成的影响

大多数关于鲍鱼喂养的研究都集中在蛋白质和总脂质的水平上。本实验用4种巨藻（Ulva lactuca、Eisenia arborea、Macrocystis pyrifera）、Gelidium robustum和一种海草（Phyllospadix torreyi）喂养黄颡鱼幼鱼174 d，分析其消化腺和肌肉的脂质组成。结果表明，以黄芪和黄芪为食的幼鱼生长较好，且成活率较高。胆固醇要么是从头合成的，要么是从鲍鱼中的其他植物甾醇转化而来的；几种甾醇与生存有关。高不饱和脂肪酸（HUFA），特别是二十二碳六烯酸（22:6n-3或DHA）被发现在喂养的树木幼鱼的组织中，不含这些HUFA。肌肉磷脂中的DHA和消化腺中的几种细菌生物标志物（15:0、17:0和支链脂肪酸）与生长呈负相关。存活与16:2n-4（硅藻的生物标志物）和iso18:0（主要是肠道细菌的生物标志物）有关。非亚甲基中断脂肪酸（NMI）在鲍鱼中最高，这与软体动物在缺乏HUFA时产生NMI的能力一致。最后，鲍鱼在没有任何饲料的情况下存活了两个月，所以喂养实验应该至少持续两倍的时间。

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来源期刊

Aquaculture International 农林科学-渔业

CiteScore

5.10

自引率

6.90%

发文量

204

审稿时长

1.0 months

期刊介绍： Aquaculture International is an international journal publishing original research papers, short communications, technical notes and review papers on all aspects of aquaculture. The Journal covers topics such as the biology, physiology, pathology and genetics of cultured fish, crustaceans, molluscs and plants, especially new species; water quality of supply systems, fluctuations in water quality within farms and the environmental impacts of aquacultural operations; nutrition, feeding and stocking practices, especially as they affect the health and growth rates of cultured species; sustainable production techniques; bioengineering studies on the design and management of offshore and land-based systems; the improvement of quality and marketing of farmed products; sociological and societal impacts of aquaculture, and more. This is the official Journal of the European Aquaculture Society.