饲粮碳水化合物水平对银鲑鱼苗生长性能、葡萄糖代谢、抗氧化能力、免疫反应和消化功能的影响

IF 3.2 2区农林科学 Q1 FISHERIES

Aquaculture Reports Pub Date : 2025-06-09 DOI:10.1016/j.aqrep.2025.102917

Hairui Yu , Lingyao Li , Leyong Yu , Abdur Rahman , Govindharajan Sattanathan

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引用次数: 0

摘要

本试验旨在研究不同碳水化合物水平对银鲑鱼苗生长性能和抗氧化能力的影响。配制6种碳水化合物含量分别为0.00 %、4.50 %、9.00 %、13.50 %、18.00 %和22.50 %的等氮（48.75 %粗蛋白质）和等脂（12.98 %粗脂肪）饲粮。试验选取900尾尾鱼（0.27 ± 0.01 g），随机分为18个试验水族箱（240 L），每种饲料设3个重复组。结果表明：饲粮碳水化合物达到13.5 %时，末重（FBW）、特定生长率（SGR）和蛋白质效率（PER）显著提高（p <； 0.05），饲料系数（FCR）显著降低（p <； 0.05）。两组间肠体指数（ISI）、肝体指数（HSI）和病情因子（CF）差异无统计学意义（p >； 0.05）。全鱼水分和灰分含量保持不变，而粗脂肪和粗蛋白质含量显著高于饲粮碳水化合物含量为13.5 %、18.0 %和22.5 %的组（p <； 0.05）。肝超氧化物歧化酶（SOD）和过氧化氢酶（CAT），以及己糖激酶（HK）、丙酮酸激酶（PK）、果糖-1,6-双磷酸酶（FBPase）活性和糖原含量在13.5 %碳水化合物水平时显著升高（p <； 0.05）。肝丙二醛（MDA）含量在13. %碳水化合物水平时最低。肝酸性磷酸酶（ACP）、碱性磷酸酶（AKP）和溶菌酶（LZM）活性（p <； 0.05）随碳水化合物水平升高而升高（p <； 0.05）。肠道淀粉酶、脂肪酶和蛋白酶活性在碳水化合物水平为13.5 %时达到峰值（p <； 0.05）。SGR折线回归分析表明，银鲑鱼苗的最佳碳水化合物需取量为14.15% %。本研究为优化银鲑饲料碳水化合物水平提供了具体目标，同时为制定可持续喂养策略提供了有价值的见解。

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Effects of dietary carbohydrate level on growth performance, glucose metabolism, antioxidant capacity, immune response, and digestive function in coho salmon Oncorhynchus kisutch (Walbaum, 1792) fry

A 10-week feeding trial was conducted to assess the effects of graded dietary carbohydrate levels on growth performance and antioxidant capacity in coho salmon (Oncorhynchus kisutch) fry. Six isonitrogenous (48.75 % crude protein) and isolipidic (12.98 % crude lipid) diets containing 0.00 %, 4.50 %, 9.00 %, 13.50 %, 18.00 %, and 22.50 % carbohydrate were formulated. A total of 900 fish (0.27 ± 0.01 g) were randomly distributed into 18 experimental tanks (240 L water volume), with triplicate groups per diet. Results showed that the final body weight (FBW), specific growth rate (SGR) and protein efficiency ratio (PER) increased significantly with dietary carbohydrate up to 13.5 % (p < 0.05), while feed conversion ratio (FCR) decreased (p < 0.05). No significant differences (p > 0.05) were observed in intestosomatic index (ISI), hepatosomatic index (HSI) and condition factor (CF). Whole-body moisture and ash content remained unchanged, whereas crude lipid and crude protein content were significantly higher in groups fed 13.5 %, 18.0 % and 22.5 % carbohydrate compared to 0.0 % and 4.5 % group (p < 0.05). Hepatic superoxide dismutase (SOD) and catalase (CAT), along with hexokinase(HK), pyruvate kinase (PK), fructose-1,6-biphosphatase (FBPase) activity, and glycogen content increased significantly up to 13.5 % carbohydrate (p < 0.05). Hepatic malondialdehyde (MDA) content was lowest at 13.5 % carbohydrate levels. The activities of hepatic acid phosphatase (ACP), alkaline phosphatase (AKP) and lysozyme (LZM)(p < 0.05) increased with carbohydrate levels (p < 0.05). Intestinal amylase, lipase and protease activities peaked at 13.5 % carbohydrate levels (p < 0.05). Broken-line regression analysis of SGR indicated an optimal dietary carbohydrate requirement of 14.15 % for coho salmon fry. This study provides concrete targets for optimizing dietary carbohydrate levels in coho salmon feed, while offering valuable insights for developing sustainable feeding strategies.

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来源期刊

Aquaculture Reports Agricultural and Biological Sciences-Animal Science and Zoology

CiteScore

5.90

自引率

8.10%

发文量

469

审稿时长

77 days

期刊介绍： Aquaculture Reports will publish original research papers and reviews documenting outstanding science with a regional context and focus, answering the need for high quality information on novel species, systems and regions in emerging areas of aquaculture research and development, such as integrated multi-trophic aquaculture, urban aquaculture, ornamental, unfed aquaculture, offshore aquaculture and others. Papers having industry research as priority and encompassing product development research or current industry practice are encouraged.