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Advances in Functional Diets and Culture Conditions in Fish: Applications...
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Advances in Functional Diets and Culture Conditions in Fish: Applications in Aquaculture

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

Deadline for manuscript submissions: 28 June 2024 | Viewed by 2427

Special Issue Editors

Dr. M.Angeles Gallardo Romero

E-Mail Website
Guest Editor
Departament de Biologia Cel·lular, Fisiologia i Immunologia, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
Interests: fish digestive physiology; aquafeeds; functional diet; feeding strategies; pancreatic enzymes; digestive enzymes; fish intestinal membrane vesicles; nutrient absorption; intestinal oxidative stress; welfare management
Dr. Irene García-Meilán

E-Mail Website
Guest Editor
Departament de Biologia Cel·lular, Fisiologia i Immunologia, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028 Barcelona, Spain
Interests: digestive enzymes; fish nutrition; brush membrane vesicles; nutrient absorption; intestinal oxidative stress; welfare physiological parameters; health management

Special Issue Information

Dear Colleagues,

Aquaculture is the fastest-growing food-producing sector, but more than 50% of production costs are invested in feed. Smart production that includes functional feeds and the optimization of culture conditions is necessary for sustainable aquaculture. In this context, the current challenges are as follows: (1) improving the digestibility and efficiency of feed; (2) enhancing growth and improving both the quality of the final product and its safety; (3) promoting welfare and fish health; and (4) increasing the sustainability of fish farming. In this sense, there is increasing interest in testing prebiotics, probiotics, enzymes, and extracts or bioactive compounds derived from plants in fish feed. Additionally, the inclusion of agricultural industry waste, as ingredients for aquafeeds, contributes to a circular economy. Finally, fish feeding strategies and sustained exercise improve animal welfare and sustainable production, these being important in optimizing fish farming conditions.

This Special Issue aims to address the applications in aquaculture of advances in both functional diets and in fish culture conditions. Key approaches may include new functional feed additives, the inclusion of vegetal bioactive extract or value-added industrial waste in diets, and fish farming conditions like feeding strategies or fish sustained swimming.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following: aquafeeds, additives, dietary alternative ingredients, feed and feeding management, and welfare management.

We look forward to receiving your contributions.

Dr. M.Angeles Gallardo Romero
Dr. Irene García-Meilán
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. 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
  • bioactive compounds
  • feeding strategies
  • fish farming conditions
  • fish nutrition
  • fish sustained swimming
  • fish welfare
  • prebiotics and probiotics
  • sustainability
  • value-added industrial waste

Published Papers (3 papers)

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Research

26 pages, 11008 KiB  
Article
The Supplementation of Berberine in High-Carbohydrate Diets Improves Glucose Metabolism of Tilapia (Oreochromis niloticus) via Transcriptome, Bile Acid Synthesis Gene Expression and Intestinal Flora
by Hongyu Liu, Menglin Wei, Beiping Tan, Xiaohui Dong and Shiwei Xie
Animals 2024, 14(8), 1239; https://doi.org/10.3390/ani14081239 - 20 Apr 2024
Viewed by 561
Abstract
Berberine is an alkaloid used to treat diabetes. This experiment aimed to investigate the effects of berberine supplementation in high-carbohydrate diets on the growth performance, glucose metabolism, bile acid synthesis, liver transcriptome, and intestinal flora of Nile tilapia. The six dietary groups were [...] Read more.
Berberine is an alkaloid used to treat diabetes. This experiment aimed to investigate the effects of berberine supplementation in high-carbohydrate diets on the growth performance, glucose metabolism, bile acid synthesis, liver transcriptome, and intestinal flora of Nile tilapia. The six dietary groups were the C group with 29% carbohydrate, the H group with 44% carbohydrate, and the HB1-HB4 groups supplemented with 25, 50, 75, and 100 mg/kg of berberine in group H. The results of the 8-week trial showed that compared to group C, the abundance of Bacteroidetes was increased in group HB2 (p < 0.05). The cholesterol-7α-hydroxylase (CYP7A1) and sterol-27-hydroxylase (CYP27A1) activities were decreased and the expression of FXR was increased in group HB4 (p < 0.05). The pyruvate carboxylase (PC) and phosphoenolpyruvate carboxykinase (PEPCK) activities was decreased in group HB4 (p < 0.05). The liver transcriptome suggests that berberine affects carbohydrate metabolic pathways and primary bile acid synthesis pathways. In summary, berberine affects the glucose metabolism in tilapia by altering the intestinal flora structure, enriching differentially expressed genes (DEGs) in the bile acid pathway to stimulate bile acid production so that it promotes glycolysis and inhibits gluconeogenesis. Therefore, 100 mg/kg of berberine supplementation in high-carbohydrate diets is beneficial to tilapia. Full article
(This article belongs to the Special Issue Advances in Functional Diets and Culture Conditions in Fish: Applications in Aquaculture)
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14 pages, 791 KiB  
Article
Nutrient and Energy Apparent Digestibility of Protein-Based Feed Ingredients and Effect of the Dietary Factors on Growth Performance and Feed Utilization of Sobaity Seabream, Sparidentex hasta
by Seemab Zehra, Joseph Leopoldo Q. Laranja, Aboobucker Siddik Abulkasim, Reda Saleh, Paulo H. De Mello, Edoardo Pantanella, Jorge Alarcon, Abdulaziz M. Al-Suwailem, A. Al Shaikhi, Brett D. Glencross and Asaad H. W. Mohamed
Animals 2024, 14(6), 933; https://doi.org/10.3390/ani14060933 - 18 Mar 2024
Viewed by 752
Abstract
Two separate feeding trials were undertaken to benchmark a series of commercial diets and determine the nutrient and energy apparent digestibility coefficients of a variety of protein-based feed ingredients when fed to sobaity seabream, Sparidentex hasta. In Experiment 1, triplicate groups of [...] Read more.
Two separate feeding trials were undertaken to benchmark a series of commercial diets and determine the nutrient and energy apparent digestibility coefficients of a variety of protein-based feed ingredients when fed to sobaity seabream, Sparidentex hasta. In Experiment 1, triplicate groups of fish (initial body weight: 330.5 ± 2.6 g) were fed with one of three locally available diets containing crude protein (CP) levels ranging from 44 to 46% of dry matter (DM), each with ~12% crude fat. Fish grew at around 3.2 g day−1 with a specific growth rate (SGR) of 0.7% day−1. Both the feed conversion ratio (FCR) and protein efficiency ratio (PER) were significantly better in fish fed diets, which contained the highest (46.4%) crude protein level. Overall, the data from these preliminary studies suggest that the best performance by sobaity seabream was obtained with a diet containing 46% crude protein, 20 MJ/kg, and a protein-to-energy ratio of 23 mg/kJ. In Experiment 2, fish with an initial body weight of 319 ± 7 g were held in 11 tanks and fed reference (D1) and test diets (D2–D11) for 7 days before fecal collection. This process was repeated twice in a blocking arrangement to generate three replicates. Each of the ten test diets contained 30% of a test ingredient, with the remaining 70% proportionally identical to the D1 diet. Diet apparent digestibility coefficients (ADCs) were measured, and the diet ADCs were then used to derive the protein and energy ADCs for the individual test ingredients. Ingredient protein ADC ranged between 75.5 and 93.9%, while ingredient energy ADC ranged between 66.8 and 81.2%. Full article
(This article belongs to the Special Issue Advances in Functional Diets and Culture Conditions in Fish: Applications in Aquaculture)
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13 pages, 1087 KiB  
Article
A Novel Postbiotic Product Based on Weissella cibaria for Enhancing Disease Resistance in Rainbow Trout: Aquaculture Application
by Mario Quintanilla-Pineda, Francisco C. Ibañez, Chajira Garrote-Achou and Florencio Marzo
Animals 2024, 14(5), 744; https://doi.org/10.3390/ani14050744 - 27 Feb 2024
Viewed by 690
Abstract
Postbiotics are innovative tools in animal husbandry, providing eco-friendly solutions for disease management within the industry. In this study, a new postbiotic product was evaluated for its impact on the health of rainbow trout (Oncorhynchus mykiss). In vivo studies were conducted [...] Read more.
Postbiotics are innovative tools in animal husbandry, providing eco-friendly solutions for disease management within the industry. In this study, a new postbiotic product was evaluated for its impact on the health of rainbow trout (Oncorhynchus mykiss). In vivo studies were conducted to assess the safety of the Weissella cibaria strains used in postbiotic production. Additionally, this study evaluated the impact of diet supplementation with 0.50% postbiotics on growth performance during a 30-day feeding trial; the gut microbial communities, immunomodulation, and protection against Yersinia ruckeri infection were evaluated. The strains did not harm the animals during the 20-day observation period. Furthermore, the effect of postbiotics on growth performance was not significant (p < 0.05). The treated group showed a significant increase in acid-lactic bacteria on the 30th day of the feeding trial, with counts of 3.42 ± 0.21 log CFU/mL. Additionally, there was an up-regulation of the pro-inflammatory cytokine IL-1β in head kidney samples after 48 h of feed supplementation, whereas cytokines IL-10, IL-8, INF-γ, and TNF-α were down-regulated. The findings indicate that rainbow trout fed with postbiotics saw an improvement in their survival rate against Y. ruckeri, with a 20.66% survival improvement in the treated group. This study proves that incorporating postbiotics from two strains of W. cibaria previously isolated from rainbow trout into the diet of fish has immunomodulatory effects, enhances intestinal microbial composition, and improves fish resistance against Y. ruckeri. Full article
(This article belongs to the Special Issue Advances in Functional Diets and Culture Conditions in Fish: Applications in Aquaculture)
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