Contribution of the diatom Navicula sp. to the growth of Penaeus vannamei post-larvae in biofloc system: a quantitative stable isotope assessment.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-10-01 Epub Date: 2024-09-09 DOI:10.1080/10256016.2024.2397472

Elizabeth Pereira Dos Santos, Jéssika Lima de Abreu, Yolanda de Macedo Dantas, Carlos Yure B Oliveira, Gelcirene de Albuquerque Costa, Gilvan Takeshi Yogui, Humber Agrelli de Andrade, Luis Otavio Brito da Silva, Alfredo Olivera Gálvez

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引用次数: 0

Abstract

The addition of Navicula sp. to shrimp nurseries can improve the growth of Penaeus vannamei reared in biofloc systems. However, the contribution of microalgae to the biofloc formation and the effective contribution to shrimp nutrition remain unknown. In this study, Navicula sp. was added to biofloc nursery systems of P. vannamei at distinct time frequencies for evaluating its nutritional contribution to shrimp growth. Nursery rearing was carried out in bioflocs for 35 days at a stocking density of 3000 post-larvae m^-3. Shrimp were fed using a commercial feed plus fresh culture of Navicula sp. at different frequencies: no addition of Navicula sp. (WN - control), the addition of 10 × 10⁴ cells mL^-1 of the diatom every 5, 10 and 15 days (N5, N10 and N15, respectively). Food sources relative contribution to P. vannamei development was estimated using a Bayesian mixture model. The isotopic discrimination factor (Δ¹⁵N and Δ¹³C) for each food source was determined experimentally. After 35 days of culture, survival (∼93 %) was similar across all treatments but there was a significant difference in weight gain and feed conversion ratio. The N10 treatment (0.50 ± 0.05 g, 0.99 ± 0.01) exhibited better growth parameters when compared to the WN treatment (0.33 ± 0.07 g, 11.46 ± 0.30). Biofloc was the food source most assimilated by shrimp followed by Navicula sp. and commercial feed. Contribution of Navicula sp. was higher in the N5 treatment. In the treatments with diatom addition, an inverse correlation was observed between the relative contributions of biofloc and Navicula sp., indicating that Navicula sp. is not in the biofloc composition, but it is directly consumed by P. vannamei post-larvae. Biofloc and Navicula sp. exhibited larger contributions to the growth of shrimp, reinforcing the importance of natural food sources to the aquaculture of P. vannamei post-larvae.

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硅藻Navicula sp.对万年青幼体在生物絮团系统中生长的贡献：定量稳定同位素评估。

在对虾育苗中添加锚藻类（Navicula sp.）可改善在生物絮团系统中饲养的凡纳滨对虾的生长。然而，微藻对生物絮团形成的贡献以及对对虾营养的有效贡献仍然未知。在这项研究中，将 Navicula sp.以不同的时间频率添加到凡纳滨对虾的生物絮团育苗系统中，以评估其对对虾生长的营养贡献。育苗在生物絮团中进行了 35 天，放养密度为 3000 新生幼体 m-3。对虾使用商业饲料和新鲜的锚藻培养物进行喂养，喂养频率各不相同：不添加锚藻（WN - 对照组），每 5 天、10 天和 15 天分别添加 10 × 104 cells mL-1 的硅藻（N5、N10 和 N15）。采用贝叶斯混合物模型估算了食物来源对凡纳米贝发育的相对贡献。每种食物来源的同位素分辨因子（Δ15N和Δ13C）是通过实验确定的。培养 35 天后，所有处理的存活率（∼93 %）相似，但增重和饲料转化率有显著差异。与 WN 处理（0.33 ± 0.07 g，11.46 ± 0.30）相比，N10 处理（0.50 ± 0.05 g，0.99 ± 0.01）的生长参数更好。生物絮团是对虾吸收最多的食物来源，其次是锚藻类和商业饲料。在 N5 处理中，锚藻类的贡献率较高。在添加硅藻的处理中，观察到生物絮体和锚藻类的相对贡献率呈反相关，表明锚藻类不在生物絮体成分中，但被凡纳滨对虾后代直接食用。生物絮团和锚藻类对对虾生长的贡献较大，这加强了天然食物来源对凡纳滨对虾后代养殖的重要性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.