Dietary Replacement Impacts of Fish Meal With Corn Gluten Meal on the Growth, Feed Utilization, and Biochemical Composition of Juvenile Red Sea Bream (Pagrus major)

IF 3 2区 农林科学 Q1 FISHERIES
Tae Woong Kwon, Sung Hwoan Cho
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引用次数: 0

Abstract

The reliance on fish meal (FM) as the primary protein source in aquafeeds is becoming increasingly unsustainable due to overfishing and limited resources. Therefore, finding an alternative protein source for FM is a crucial issue in the research of aquafeed nutrition. Corn gluten meal (CGM) is a plant protein source commonly used in aquafeeds that has been considered a practical substitute for FM. This study is designed to evaluate the impacts of substituting FM with CGM in the feed of red sea bream (Pagrus major) on growth, feed utilization, and biochemical composition. Total of 600 juvenile (8.60 ± 0.011 g; initial mean body weight ± SE) fish were assigned to twelve 300 L flow-through tanks. The control (Con) diet included 55% FM. In the Con diet, 20%, 40%, and 60% of FM were replaced with CGM, identified as the CG20, CG40, and CG60 diets, respectively. Four isoproteic (51.5%) and isolipidic (14.5%) diets were prepared. All diets were supplied to triplicate groups of fish. Fish were hand-fed to satiation level twice daily for 56 days. At the completion of the 56-day feeding trial, the weight gain (WG) and specific growth rate (SGR) of red sea bream fed the Con and CG20 diets were superior (p < 0.0001 for both) to fish fed the CG40 and CG60 diets. WG and SGR of red sea bream linearly decreased with elevated dietary FM replacement levels (Y = −5.003333X + 38.9667, R2 = 0.9004, p < 0.0001 and Y = −0.002607X + 0.0314, R2 = 0.9083, p < 0.0001, respectively). Feed consumption (FC), protein efficiency ratio (PER), and protein retention (PR) of red sea bream fed the Con and CG20 diets were statistically (p < 0.006, p < 0.003, and p < 0.004, respectively) higher than those of fish fed the CG40 and CG60 diets. The feed conversion ratio (FCR) of red sea bream fed the CG40 and CG60 diets were statistically (p < 0.0002) higher than that of fish fed the Con and CG20 diets. The hepatosomatic index (HSI) of fish fed the Con and CG20 diets was statistically (p < 0.005) lower than that of fish fed the CG40 and CG60 diets. Neither the plasma and serum parameters nor the biochemical composition except for arginine and lysine content of the whole-body fish were statistically (p > 0.05) altered by dietary FM substitution with CGM. In conclusion, FM up to 20% could be replaced by CGM in the diet of red sea bream without bringing about negative impacts on the growth, feed utilization, biological indices (except for HSI), blood chemistry, proximate composition, amino acid (AA; except for arginine and lysine content), and fatty acid (FA) profiles.

玉米蛋白粉替代鱼粉对红鲷幼鱼生长、饲料利用及生化成分的影响
由于过度捕捞和资源有限,依赖鱼粉(FM)作为水产饲料中的主要蛋白质来源正变得越来越不可持续。因此,寻找替代鱼粉的蛋白质来源是水产饲料营养研究中的一个关键问题。玉米蛋白粉(CGM)是水产饲料中常用的一种植物蛋白源,被认为是饲料的实用替代品。本研究旨在评价饲料中用CGM替代鱼粉对红鲷(Pagrus major)生长、饲料利用和生化组成的影响。幼鱼共600只(8.60±0.011 g;初始平均体重±SE)的鱼被分配到12个300l流量的水槽中。对照组饲粮中添加55%的鱼粉。在Con饲粮中,用CGM代替20%、40%和60%的鱼粉,分别确定为CG20、CG40和CG60饲粮。配制4种异蛋白(51.5%)和等脂(14.5%)饲料。所有饲料均提供给三个重复组的鱼。每天两次人工喂鱼至饱腹,连续喂56天。56 d饲喂试验结束时,Con和CG20饲粮对红鲷的增重(WG)和特定生长率(SGR)均有显著提高(p <;0.0001)与CG40和CG60日粮相比。随着饲料中鱼粉替代水平的升高,红鲷的WG和SGR呈线性降低(Y = - 5.003333X + 38.9667, R2 = 0.9004, p <;0.0001 x和Y =−0.002607 + 0.0314,R2 = 0.9083, p & lt;分别为0.0001)。Con和CG20饲粮对红鲷的饲料消耗(FC)、蛋白质效率(PER)和蛋白质保留率(PR)有统计学意义(p <;0.006, p <;0.003, p <;分别为0.004),高于CG40和CG60饲料。红鲷饲喂CG40和CG60饲料的饲料系数(FCR)差异有统计学意义(p <;0.0002),高于Con和CG20饲料。Con和CG20饲料对鱼的肝体指数(HSI)差异有统计学意义(p <;0.005),低于CG40和CG60饲料。除精氨酸和赖氨酸含量外,全鱼的血浆和血清参数及生化组成均无统计学意义(p >;0.05)。综上所述,在不影响红鲷鱼生长、饲料利用率、生物指标(HSI除外)、血液化学、近似组成、氨基酸(AA)、氨基酸(AA)、氨基酸(AA)、氨基酸(AA)等指标的情况下,CGM可替代红鲷鱼饲料中高达20%的鱼粉。除了精氨酸和赖氨酸含量)和脂肪酸(FA)谱。
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来源期刊
Aquaculture Nutrition
Aquaculture Nutrition 农林科学-渔业
CiteScore
7.20
自引率
8.60%
发文量
131
审稿时长
3 months
期刊介绍: Aquaculture Nutrition is published on a bimonthly basis, providing a global perspective on the nutrition of all cultivated aquatic animals. Topics range from extensive aquaculture to laboratory studies of nutritional biochemistry and physiology. The Journal specifically seeks to improve our understanding of the nutrition of aquacultured species through the provision of an international forum for the presentation of reviews and original research papers. Aquaculture Nutrition publishes papers which strive to: increase basic knowledge of the nutrition of aquacultured species and elevate the standards of published aquaculture nutrition research. improve understanding of the relationships between nutrition and the environmental impact of aquaculture. increase understanding of the relationships between nutrition and processing, product quality, and the consumer. help aquaculturalists improve their management and understanding of the complex discipline of nutrition. help the aquaculture feed industry by providing a focus for relevant information, techniques, tools and concepts.
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