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Animals
Special Issues
Using Agricultural By-Products in Aquafeeds
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Using Agricultural By-Products in Aquafeeds

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Animal Nutrition".

Deadline for manuscript submissions: closed (31 March 2024) | Viewed by 978

Special Issue Editors

Dr. Samad Rahimnejad

E-Mail Website
Guest Editor
Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, Murcia, Spain
Interests: fish nutrition; fish physiology; fish immunology
Special Issues, Collections and Topics in MDPI journals
Dr. Francisco A. Guardiola

E-Mail Website
Guest Editor
Immunobiology for Aquaculture Group, Department of Cell Biology and Histology, Faculty of Biology, University of Murcia, 30100 Murcia, Spain
Interests: fish and shellfish immunology; aquaculture nutrition
Special Issues, Collections and Topics in MDPI journals
Dr. Shiwei Xie

E-Mail Website
Guest Editor
Laboratory of Aquatic Animal Nutrition and Feed, Fisheries College, Guangdong Ocean University, Zhanjiang 524088, China
Interests: fish nutrition; fish physiology

Special Issue Information

Dear Colleagues,

Along with the expansion of the aquaculture industry, the demand for compound feed has also significantly risen. The industry has been relying on fish meal and fish oil, which are no longer economically feasible or environmentally sustainable due to dwindling resources.

Agricultural wastes offer considerable potential as feed ingredients in aquafeeds due to their abundant availability and encompass the by-products resulting from the production and processing of agricultural products. Annually, millions of tonnes of agricultural waste are generated from cultivation and processing of crops, fruits, and animals. Without effective waste management strategies, agricultural waste will jeopardize the environment, economy, and human well-being.

The integration of agricultural waste into aquafeeds offers potential benefits in terms of cost-effective production, waste management, and industrial sustainability. These by-products serve as viable alternatives for reducing dependence on traditional commodities used for aquafeed manufacture. Nevertheless, there is currently limited information regarding the availability and utilization of agricultural waste in aquafeeds.

In this context, this Special Issue aims to collect papers, in the form of original research articles or reviews, concerning incorporating potential agricultural wastes abundantly available on an industrial scale into aquafeeds, as well as the employment of technologies for improving their nutritional value and optimizing their inclusion level in aquafeeds.  

Dr. Samad Rahimnejad
Dr. Francisco A. Guardiola
Dr. Shiwei Xie
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aquafeeds
  • fish nutrition
  • aquaculture sustainability
  • agricultural by-products
  • alternative feedstuffs
  • fish health
  • ingredient processing
  • circular aquaculture

Published Papers (1 paper)

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Research

16 pages, 2836 KiB  
Article
Utilization of Cottonseed Meal Protein Hydrolysate by Crustaceans: Insights on Growth Performance, Protein Turnover, and Metabolism in Chinese Mitten Crab Eriocheir sinensis
by Chaofan He, Wenbin Liu, Ling Zhang, Weiliang Chen, Zishang Liu, Xiangyu Qian and Xiangfei Li
Animals 2023, 13(23), 3631; https://0-doi-org.brum.beds.ac.uk/10.3390/ani13233631 - 23 Nov 2023
Viewed by 720
Abstract
Plant protein hydrolysates could enhance the growth performance and diet utilization of aquaculture species. The mechanisms underlying their beneficial effects, however, remain unclear. The purpose of this study was to appraise the effects of cottonseed meal protein hydrolysate (CPH) supplementation on the growth [...] Read more.
Plant protein hydrolysates could enhance the growth performance and diet utilization of aquaculture species. The mechanisms underlying their beneficial effects, however, remain unclear. The purpose of this study was to appraise the effects of cottonseed meal protein hydrolysate (CPH) supplementation on the growth performance, amino acid profiles, and protein turnover and metabolism of Eriocheir sinensis. A total of 240 crabs (initial weight: 37.32 ± 0.38 g) were randomly assigned to six groups, and fed six iso-protein feeds supplemented with varying levels of 0% (the control group), 0.2%, 0.4%, 0.8%, 1.6% and 3.2% of CPH. These diets were continuously fed to the crabs for 12 weeks. The findings demonstrated that, compared with the control group, adding 0.4–0.8% CPH to the diet significantly increased the specific growth rate, nitrogen retention efficiency, hepatopancreas index, body crude protein content, hepatopancreas alanine aminotransferase and glutamine synthetase activities, hemolymph total protein content, the hepatopancreas transcription of S6 kinase-poly-peptide 1, and the hepatopancreas protein levels of insulin-like growth factor-1 (IGF-1), protein kinase B (Akt), and target of rapamycin (TOR) of crabs. In contrast, when the dose of dietary CPH reached 3.2%, the forkhead box O1 (FoxO1) protein expression showed a significant decrease compared with the control group. In addition, CPH supplementation also increased the amount of amino acids and free amino acids in hepatopancreas and hemolymph, respectively. Together, these findings demonstrated that dietary supplementation of 0.4–0.8% CPH could activate the IGF-1/Akt/TOR pathway of E. sinensis, thereby improving growth performance, protein synthesis, and utilization. For cost considerations, the recommended dietary dose of CPH for E. sinensis is 0.8%. Due to the above benefits, CPH has the potential to be used as a growth promoter for other aquatic animals, especially crustaceans. Full article
(This article belongs to the Special Issue Using Agricultural By-Products in Aquafeeds)
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