日粮蛋白质来源的昼夜变化对白鲸生长性能、胴体成分和肠道酶活性的影响

IF 2.3 3区 农林科学 Q2 FISHERIES Journal of The World Aquaculture Society Pub Date : 2024-04-18 DOI:10.1111/jwas.13067
Zeinab Najafi, Hossein Ouraji, Sakineh Yeganeh, Ayoub Farhadi
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引用次数: 0

摘要

水产养殖生产的主要成本是饲料,因此管理方法和饲养策略的目标是优化饲料摄入量和效率。本研究旨在评估定期改变日粮蛋白质来源对白鲸生长性能的影响,从而确定可能的创新饲养策略,以更有效地利用日粮蛋白质。本研究设计了两种实验性日粮,即鱼粉(日粮 A)和植物蛋白混合日粮(日粮 B)(蛋白质 40%,脂肪 16%),这两种日粮在 8 周内以不同的饲喂计划饲喂白鲸(初始体重 82.08 ± 4.1 克)。实验处理包括:连续饲喂鱼粉日粮(A);连续饲喂植物蛋白日粮(B);上午 A 日粮和下午 B 日粮交替饲喂(A 上午/B 下午);上午 B 日粮和下午 A 日粮交替饲喂(B 上午/A 下午);A 日粮和 B 日粮交替饲喂一天(1A/1B)。在为期八周的试验结束时,观察到摄入 A、Bam/Apm 和 Aam/Bpm 日粮的鱼的生长性能和饲料利用率分别优于其余处理。饲喂Aam/Bpm和Bam/Apm的鱼的胰蛋白酶和糜蛋白酶的比活力明显较高。连续饲喂以鱼粉为基础的日粮(A)会导致鱼体蛋白质含量降低,脂肪沉积增加。在混合饲喂方案中,Aam/Bpm 和 Bam/Apm 方案节省的成本最高。根据经济分析,与其他处理相比,采用Aam/Bpm和Bam/Apm计划可降低白鲸的生产成本。因此,Aam/Bpm 和 Bam/Apm 是白鲸的最佳饲喂计划,应作为白鲸生产的实用饲喂指南。
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Effects of circadian variation of dietary protein sources on growth performance, carcass composition and intestinal enzyme activity in beluga, Huso huso

The main cost in aquaculture production is feed, so management practices and feeding strategies aim to optimize both feed intake and efficiency. This study aimed to evaluate the growth performance of beluga, Huso huso, affected by periodic changes in dietary protein sources and hence identify possible innovative feeding strategies toward more efficient use of dietary protein. This study was designed with two experimental diets, namely fish meal (diet A) and plant protein blend (diet B) (protein 40%, fat 16%), which were used in different food schedules for feeding beluga (initial weight 82.08 ± 4.1 g) during 8 weeks. The experimental treatments included: continuously feeding a fish meal diet (A); continuously feeding a plant protein diet (B); alternating between diet A in the morning and diet B in the afternoon (A am/B pm); alternating between diet B in the morning and diet A in the afternoon (B am/A pm); and alternating between diet A for one day and diet B for one day (1A/1B). At the end of the eight-week trial, superior growth performance and feed utilization were respectively observed in fish receiving A, Bam/Apm, and Aam/Bpm diets compared with the remaining treatments. The specific activity of trypsin and chymotrypsin was significantly high in fish fed Aam/Bpm and Bam/Apm. Feeding the fish-meal-based diet (A) continuously, led to decreased protein and increased fat deposition in the carcass. Among the mixed feeding schedules, the highest cost-saving was recorded with the Aam/Bpm and Bam/Apm schedules. Based on economic analysis, applying Aam/Bpm and Bam/Apm schedules led to the reduced cost of beluga production compared with the other treatments. Therefore, the optimal feeding schedules for beluga are Aam/Bpm and Bam/Apm, which should be used as a practical feeding guideline for H. huso production.

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来源期刊
CiteScore
5.90
自引率
7.10%
发文量
69
审稿时长
2 months
期刊介绍: The Journal of the World Aquaculture Society is an international scientific journal publishing original research on the culture of aquatic plants and animals including: Nutrition; Disease; Genetics and breeding; Physiology; Environmental quality; Culture systems engineering; Husbandry practices; Economics and marketing.
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