Efficacy of various feed attractants on growth, feed intake, immuno-metabolic responses, and gene expression of Penaeus vannamei reared in an oligohaline semi-biofloc system

IF 3.5 3区农林科学 Q2 FISHERIES

Aquaculture International Pub Date : 2026-09-21 DOI:10.1007/s10499-026-02692-y

Potluri Sai Kishore, Md. Aklakur, Tincy Varghese, Karthireddy Syamala, Udipta Roy, Ashutosh D. Deo, Muralidhar P. Ande, Arunashri A., Kedar Nath Mohanta

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Abstract

In the current study, six different attractants were evaluated: 5% gastropod meal (GPM), 5% SQL (SQL), 5% shrimp head meal (SHM), 0.2% taurine (TAR), 2.5% glycine (GLY) and 0.1% dimethyl β-propiothetin (DMP), in the diets of Penaeus vannamei cultured in an oligohaline semi-biofloc system. Juvenile P. vannamei (1.24 ± 0.10 g) were randomly assigned to seven experimental groups (200 juveniles/m³). Each group was fed with a practical basal diet (34% crude protein and 6% lipid), supplemented with the respective attractant, designated as GPM, SQL, SHM, TAR, GLY and DMP. A control group received a diet without any attractant. Among all treatments, the GPM group demonstrated significantly higher (p < 0.05) weight gain, specific growth rate, and apparent protein efficiency ratio, along with a significantly lower (p < 0.05) apparent feed conversion ratio compared to the control group. Digestive and metabolic enzyme activities were enhanced (p < 0.05) in the GPM group compared to the control, though these levels were frequently comparable (p > 0.05) to the SQL group. analysis of whole-body proximate composition and amino acid profile revealed no significant changes (p > 0.05) among experimental groups. Stress indicators, including haemolymph glucose levels and hsp70 mRNA expression levels, were found to be elevated (p < 0.05) in the control group and significantly reduced (p < 0.05) in the GPM group. Antioxidant enzyme responses varied among treatments, with the lowest (p < 0.05) catalase and superoxide dismutase (SOD) activities observed in the GPM and GLY groups, respectively. Among all groups, the immunological parameters, including haemolymph total protein, hemocyanin, phenol oxidase, and prophenoloxidase mRNA expression, were found to be significantly higher (p < 0.05) in GPM group. A simple economic analysis demonstrated that the GPM group achieved the highest benefit-to-cost ratio, suggesting that gastropod meal may serve as a promising feed attractant in commercial feeds of P. vannamei, though these economic outcomes are preliminary estimates derived from the present experimental conditions.

Graphical Abstract

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不同饵料引诱剂对低聚盐半生物群落中凡纳滨对虾生长、采食量、免疫代谢反应和基因表达的影响

本研究对凡纳滨对虾（Penaeus vannamei）在低盐半生物团体系中培养的饲料中分别添加5%腹足类粉（GPM）、5% SQL （SQL）、5%虾头粉（SHM）、0.2%牛磺酸（TAR）、2.5%甘氨酸（GLY）和0.1%二甲基β-丙素（DMP） 6种不同的引诱剂进行了研究。凡纳美对虾幼鱼（1.24±0.10 g）随机分为7个试验组（200尾/m3）。各组饲喂实用基础饲粮（粗蛋白质34%，脂肪6%），并在基础饲粮中添加引诱剂GPM、SQL、SHM、TAR、GLY和DMP。对照组饲喂不含诱食剂的饮食。在所有处理中，GPM组的增重、特定生长率和表观蛋白质效率显著高于对照组（p < 0.05），表观饲料系数显著低于对照组（p < 0.05）。与对照组相比，GPM组的消化和代谢酶活性增强（p < 0.05），尽管这些水平与SQL组通常相当（p < 0.05）。各试验组间全鱼近似组成及氨基酸谱分析无显著差异（p > 0.05）。对照组血淋巴葡萄糖水平和hsp70 mRNA表达水平升高（p < 0.05）， GPM组应激指标显著降低（p < 0.05）。各处理对抗氧化酶的反应各不相同，GPM组过氧化氢酶和超氧化物歧化酶（SOD）活性最低，GLY组最低（p < 0.05）。各组中，GPM组血淋巴总蛋白、血青素、酚氧化酶和酚氧化酶原mRNA表达量均显著升高（p < 0.05）。一项简单的经济分析表明，GPM组获得了最高的效益成本比，这表明腹足类饲料可能作为一种有前途的饲料引诱剂用于凡纳滨虾的商业饲料，尽管这些经济结果是根据目前的实验条件得出的初步估计。图形抽象

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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.