Sea lettuce (Ulva ohnoi) cultivation in biofloc technology: growth performance and characterization of bioactive compounds

IF 0.5 4区农林科学 Q4 FISHERIES

Boletim do Instituto de Pesca Pub Date : 2023-11-17 DOI:10.20950/1678-2305/bip.2023.49.e848

Jamilly Sousa Rocha, Daniele Santos, M. A. Martins, Cláudia Marlene Bauer, Marcelo Maraschin, Leila Hayashi, Felipe do Nascimento Vieira

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Abstract

This work evaluated the biofloc technology cultivation of Ulva ohnoi on its growth performance and biocompounds contents. Ulva ohnoi was cultivated under an initial density of 6 g·L-1 for 28 days using water from a biofloc tank which was exchanged daily at a 90% rate. Temperature, salinity, and illuminance were measured daily. Algae growth and their density was adjusted weekly. Results showed an average plant growth of 1.15%·day-1 (49.5 g·week-1). A significant difference was observed when comparing the initial (2.64 ± 0.3%) and final (4.62 ± 0.2%) ulvan concentration, in addition to a protein increase of 30.2%. No statistical differences were found for concentrations of phenolics and chlorophylls. An increase in flavonoids was observed on days 7 and 14 (0.41 ± 0.04; and 0.41 ± 0.07 μg·g-1 of dry weight), as well as a decrease in carotenoids (41.3%). In conclusion, increases in protein and ulvan were observed after Ulva ohnoi was cultivated in bioflocs

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用生物絮团技术栽培海莴苣：生长性能和生物活性化合物的表征

这项研究评估了用生物絮团技术栽培大叶莼对其生长性能和生物化合物含量的影响。在初始密度为 6 g-L-1 的条件下，使用生物絮凝池中的水对大叶莼进行了 28 天的培养。每天测量温度、盐度和光照度。每周调整藻类的生长和密度。结果显示，植物平均生长率为 1.15%-天-1（49.5 克-周-1）。在比较初始（2.64 ± 0.3%）和最终（4.62 ± 0.2%）的乌尔凡浓度时，观察到了明显的差异，此外蛋白质也增加了 30.2%。酚类物质和叶绿素的浓度没有统计学差异。在第 7 天和第 14 天，黄酮类化合物有所增加（分别为 0.41 ± 0.04 和 0.41 ± 0.07 μg-g-1 干重），类胡萝卜素则有所减少（41.3%）。总之，在生物絮团中培养大叶莼后，蛋白质和溃疡素都有所增加。

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来源期刊

Boletim do Instituto de Pesca FISHERIES-ZOOLOGY

CiteScore

0.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： To publish original articles of research and short communications in the following áreas: Fisheries, Aquaculture, Zootechnology, Limnology, Oceanography, Biology and Pathology of aquatic organisms. The publication depends on the approval of the Editorial Board, based on the peer review.