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放养密度对稻鱼综合种养系统中[鱼的品种未明确]生长性能、生理参数、抗氧化状态及脂质代谢的影响

Effects of Stocking Density on the Growth Performance, Physiological Parameters, Antioxidant Status and Lipid Metabolism of in the Integrated Rice-Fish Farming System.

作者信息

Diao Weixu, Jia Rui, Hou Yiran, Dong Yin, Li Bing, Zhu Jian

机构信息

Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China.

Key Laboratory of Integrated Rice-Fish Farming Ecology, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China.

出版信息

Animals (Basel). 2023 May 23;13(11):1721. doi: 10.3390/ani13111721.

Abstract

is a freshwater fish commonly raised in rice fields, yet the optimal stocking density for this species remains unknown. Therefore, this study aimed to investigate the appropriate stocking density of in integrated rice-fish farming systems. Three different stocking densities--low density (LD, 125 g/m), middle density (MD, 187.5 g/m), and high density (HD, 250 g/m)--were set up to evaluate 's growth performance, stress indices, immune function, antioxidant status, and lipid metabolism after 90 days of farming. The results indicated that HD treatment had a detrimental effect on 's growth parameters. HD treatment led to an increase in cortisol (Cor) and lactate (La) levels, but a decrease in glucose (Glu) content in serum. After 90 days of farming, an immune response accompanied by the increase of complement 3 (C3), C4, and immunoglobulin M (IgM) was observed in the HD group. Meanwhile, HD treatment induced oxidative stress and altered antioxidative status evidenced by the levels of catalase (CAT), glutathione peroxidase (Gpx), glutathione (GSH), malondialdehyde (MDA), superoxide dismutase (SOD), and total antioxidant capacity (T-AOC) in serum or liver. Additionally, the lipid metabolism-related genes including lipoprotein lipase (), peroxisome proliferators-activated receptor (), carnitine palmitoyltransferase-1 (), and sterol regulatory element binding protein-1 () were markedly downregulated in the HD and/or MD group after 90 days of farming. In conclusion, this study contributes to a better understanding of 's response to different stocking densities in integrated rice-fish farming systems. We suggest that the appropriate stocking density for in these farming systems should be below 250 g/m, considering both fish growth and physiological responses.

摘要

是一种常见于稻田中养殖的淡水鱼,然而该物种的最佳放养密度仍不清楚。因此,本研究旨在探讨稻鱼综合养殖系统中的适宜放养密度。设置了三种不同的放养密度——低密度(LD,125克/平方米)、中密度(MD,187.5克/平方米)和高密度(HD,250克/平方米),以评估养殖90天后的生长性能、应激指标、免疫功能、抗氧化状态和脂质代谢。结果表明,高密度处理对的生长参数有不利影响。高密度处理导致血清中皮质醇(Cor)和乳酸(La)水平升高,但葡萄糖(Glu)含量降低。养殖90天后,在高密度组中观察到免疫反应,伴随着补体3(C3)、C4和免疫球蛋白M(IgM)的增加。同时,高密度处理诱导氧化应激并改变抗氧化状态,血清或肝脏中过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(Gpx)、谷胱甘肽(GSH)、丙二醛(MDA)、超氧化物歧化酶(SOD)和总抗氧化能力(T-AOC)水平证明了这一点。此外,养殖90天后,高密度和/或中密度组中与脂质代谢相关的基因,包括脂蛋白脂肪酶()、过氧化物酶体增殖物激活受体()、肉碱棕榈酰转移酶-1()和固醇调节元件结合蛋白-1()明显下调。总之,本研究有助于更好地了解稻鱼综合养殖系统中对不同放养密度的反应。考虑到鱼类生长和生理反应,我们建议这些养殖系统中的适宜放养密度应低于250克/平方米。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9007/10251942/b97e4aef0c4e/animals-13-01721-g001.jpg

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