Fish processing side streams are promising ingredients in diets for rainbow trout (Oncorhynchus mykiss) – Effects on growth physiology, appetite, and intestinal health

Author:

Warwas Niklas123ORCID,Langeland Markus34,Roques Jonathan A. C.12,Montjouridès Marie1,Smeets Jolie1,Sundh Henrik12,Jönsson Elisabeth123,Sundell Kristina123

Affiliation:

1. Department of Biological and Environmental Sciences University of Gothenburg Gothenburg Sweden

2. Swedish Mariculture Research Center SWEMARC, University of Gothenburg Gothenburg Sweden

3. Blue Food, Center for future seafood University of Gothenburg Gothenburg Sweden

4. RISE Research Institute of Sweden Gothenburg Sweden

Abstract

AbstractDue to the growth of aquaculture and the finite supply of fishmeal and oil, alternative marine protein and lipid sources are highly sought after. Particularly promising is the use of side streams from the fish processing industry, allowing for the recovery and retention of otherwise lost nutrients in the food production chain. The aim of the present study was to evaluate the potential of three fish processing side streams as fish feed ingredients. The side streams originated from different stages of the production chain, were used without further processing, and included sprat trimmings (heads, frames, viscera), marinated herring (fillets) and mackerel in tomato sauce (fillets and sauce). The three side streams contained moderate levels of protein (28–32% dry matter) and high levels of lipid (34–43%). The sprat trimmings included ca. 29% ash and 1.5% phosphorous which may add value due to the high level of essential minerals but needs to be considered in feed formulations. Three diets were formulated to include 50% of each side stream replacing all fishmeal and ca. 80% of the fish oil of the control diet, which contained 35% fishmeal and 10% fish oil. The diets were evaluated in a 12‐week feeding trial using rainbow trout (Oncorhynchus mykiss). Fish fed the sprat diet displayed the highest feed intake and growth, and showed no negative effects on the intestinal health. The mackerel side stream displayed a good digestibility but resulted in lower growth rates compared to the sprat trimmings. Fish fed the herring diet, displayed the lowest performance regarding growth, feed intake and digestibility. They further exhibited a reduction in nutrient uptake in both proximal and distal intestine, likely contributing to the observed lower digestibility and growth, and a reduction in plasma ghrelin levels. As part of a circular approach to increase marine lipid and protein production for fish feed, the tested sprat and mackerel side streams are promising raw materials however additional studies using more commercial‐like feed formulations are encouraged.

Funder

Göteborgs Universitet

Kungl. Skogs- och Lantbruksakademien

Svenska Forskningsrådet Formas

Publisher

Wiley

Subject

Aquatic Science,Ecology, Evolution, Behavior and Systematics

Reference84 articles.

1. Abdollahi M. Hyldig G. Sørensen A. D. M. Sørensen R. Iñarra B. Chastagnol C. B. Gutierrez M. San Martin D. Simonsen A. Dam L. &Jacobsen C.(2020).Hurdles and bottlenecks in maintaining and value adding of seafood side‐streams.

2. Seasonal Changes in Crude and Lipid Composition of Herring Fillets, Byproducts, and Respective Produced Oils

3. Arason S. Karlsdottir M. Valsdottir T. Slizyte R. Rustad T. Falch E. Eysturskard J. &Jakobsen G.(2009).Maximum resource utilisation‐value added fish by‐products.

4. Development and regression of soybean meal induced enteritis in Atlantic salmon, Salmo salar L., distal intestine: a comparison with the intestines of fasted fish

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3