Antioxidant Properties in Novel Feed Ingredients for Fish

A special issue of Antioxidants (ISSN 2076-3921).

Deadline for manuscript submissions: 31 October 2024 | Viewed by 505

Special Issue Editor


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Guest Editor
CIIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208 Matosinhos, Portugal
Interests: marine and environmental research; aquafeeds; fish; intestine oxidative status

Special Issue Information

Dear Colleagues,

In the future, aquaculture will be the most reliable seafood source to meet the increasing protein requirements. However, concerns are rising regarding its environmental impact due to the reliance of aquaculture feeds on fishery ingredients. Alternative ingredients, such as insect meal, plant feedstuffs, processed animal proteins and single-cell microorganisms, are increasingly being used nowadays. In addition to advantages such as reducing fishery-derived ingredient usage, high availability and affordable prices, alternative ingredients also present antioxidant properties. Those properties may be related with the fatty acid composition, amino acid composition, bioactive components or other components such as the chitin and chitosan in insect meals. Fish oxidative stress is thereby reduced by an increased antioxidant potential or decreased oxidative damage (lipid and protein oxidation). An improved oxidative status will allow for increasing fish welfare even when produced intensively, leading to a more sustainable production pattern.

This Special Issue welcomes contributions on these topics as literature reviews, original research manuscripts or short communications. The topics of interest include manuscripts on the use of alternative feed ingredients, such as insect meal, medicinal plants or any other ingredient which potentially presents antioxidant properties in fish.

Dr. Inês Guerreiro
Guest Editor

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. Antioxidants is an international peer-reviewed open access monthly 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 2900 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
  • oxidative status
  • aquaculture
  • antioxidant
  • insect meal

Published Papers (1 paper)

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Research

21 pages, 51684 KiB  
Article
Mitigating Dietary Microplastic Accumulation and Oxidative Stress Response in European Seabass (Dicentrarchus labrax) Juveniles Using a Natural Microencapsulated Antioxidant
by Matteo Zarantoniello, Nico Cattaneo, Federico Conti, Margherita Carrino, Gloriana Cardinaletti, İdris Şener and Ike Olivotto
Antioxidants 2024, 13(7), 812; https://doi.org/10.3390/antiox13070812 (registering DOI) - 5 Jul 2024
Viewed by 359
Abstract
Aquafeed’s contamination by microplastics can pose a risk to fish health and quality since they can be absorbed by the gastrointestinal tract and translocate to different tissues. The liver acts as a retaining organ with the consequent triggering of oxidative stress response. The [...] Read more.
Aquafeed’s contamination by microplastics can pose a risk to fish health and quality since they can be absorbed by the gastrointestinal tract and translocate to different tissues. The liver acts as a retaining organ with the consequent triggering of oxidative stress response. The present study aimed to combine the use of natural astaxanthin with natural-based microcapsules to counteract these negative side effects. European seabass juveniles were fed diets containing commercially available fluorescent microplastic microbeads (1–5 μm; 50 mg/kg feed) alone or combined with microencapsulated astaxanthin (AX) (7 g/kg feed; tested for half or whole feeding trial—30 or 60 days, respectively). Fish from the different dietary treatments did not evidence variations in survival and growth performance and did not show pathological alterations at the intestinal level. However, the microplastics were absorbed at the intestinal level with a consequent translocation to the liver, leading, when provided solely, to sod1, sod2, and cat upregulation. Interestingly, the dietary implementation of microencapsulated AX led to a mitigation of oxidative stress. In addition, the microcapsules, due to their composition, promoted microplastic coagulation in the fish gut, limiting their absorption and accumulation in all the tissues analyzed. These results were supported by in vitro tests, which demonstrated that the microcapsules promoted microplastic coagula formation too large to be absorbed at the intestinal level and by the fact that the coagulated microplastics were released through the fish feces. Full article
(This article belongs to the Special Issue Antioxidant Properties in Novel Feed Ingredients for Fish)
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