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New Insights into Fish Physiology-Applications Focus: Challenges and Mitigations II
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New Insights into Fish Physiology-Applications Focus: Challenges and Mitigations II

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Marine Biology".

Deadline for manuscript submissions: closed (20 September 2023) | Viewed by 5301

Special Issue Editors

Dr. Ten-Tsao Wong

E-Mail Website
Guest Editor
The Institute of Marine and Environmental Technology, University of Maryland, Baltimore County, Baltimore, MD 21202, USA
Interests: marine biotechnology; germ cell biology; sterility; reproductive endocrinology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Allen Place

E-Mail Website
Guest Editor
Institute for Marine and Environmental Technology, University of Maryland Center of Environmental Science, Columbus Center, Suite 236, 701 East Pratt Street, Baltimore, MD 21202, USA
Interests: algal toxins; biosynthesis; sterolysin; karlotoxin; fishkill
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue is the continuation of a previous release, and aims to collect and convey the latest progress in applied aspects of fish physiology. We invite review and original research manuscripts that contribute knowledge to topics including but not limited to the following:

  • Selective breeding for improving beneficial physiological traits;
  • Diets and gut microbiome for improving performance and health;
  • Reproductive physiology;
  • Environmental physiology;
  • Disease physiology;
  • Genomics and epigenetics in fish physiology;
  • Mitigating approaches to the challenges in fish physiology.

Our goal is to develop this Special Issue to the extent that it will promote our knowledge of fish physiology and physiological responses. In addition, we hope to provide valuable insights into mitigating and resolving physiological problems and complications in the applied aspects.

Dr. Ten-Tsao Wong
Prof. Dr. Allen Place
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. Journal of Marine Science and Engineering 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 2600 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

  • applied fish physiology
  • selective breeding
  • alternative diets
  • environmental physiology
  • disease physiology
  • genomics and epigenetics
  • gut microbiome

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

14 pages, 2965 KiB  
Article
Induction of Reproductive Sterility in Coho Salmon (Oncorhynchus kisutch) by an Immersion-Based Gene Silencing Technology
by Lan Xu, Mingli Zhao, Yonathan Zohar and Ten-Tsao Wong
J. Mar. Sci. Eng. 2023, 11(12), 2208; https://doi.org/10.3390/jmse11122208 - 21 Nov 2023
Viewed by 1619
Abstract
Undesired maturation and reproduction are major challenges in fish aquaculture regarding genetic introgression, precocious maturation, and reproduction-related mortality, which can have profound ecological or economic impacts. Farming reproductively sterile fish can effectively mitigate these challenges. In this paper, we transferred and applied a [...] Read more.
Undesired maturation and reproduction are major challenges in fish aquaculture regarding genetic introgression, precocious maturation, and reproduction-related mortality, which can have profound ecological or economic impacts. Farming reproductively sterile fish can effectively mitigate these challenges. In this paper, we transferred and applied a novel immersion-based, non-transgenic gene silencing technology to sterilize coho salmon for the first time. Unfertilized eggs were bath immersion-treated with csdnd-MO-Vivo in different immersion media. Eyed rates of treated groups ranged from 0.9 to 63.5%. Sterile fish lacking germ cells, and those with arrested germ cells/atretic oocytes, were obtained at 14 and 20 months of age, albeit at a low percentage (2.3 to 10.0% based on females). Gonadal histology and vasa/nanos3 gene expression profile were provided for comparing fertile and sterile gonads, as well as retarded ovaries. Future directions and strategies for optimizing the technology and improving sterility induction were also proposed. The successful production of sterile coho salmon achieved in this study demonstrates the proof of principle for this new sterilization technology. As we continue to expand upon these findings and refine the technology, achieving coho salmon sterile population farming would facilitate the future transfer and application to other commercially important aquaculture fish. Full article
(This article belongs to the Special Issue New Insights into Fish Physiology-Applications Focus: Challenges and Mitigations II)
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17 pages, 2724 KiB  
Article
Establishment and Optimization of an Aggregate Culture System of Testicular Cells from Marine Medaka, Oryzias dancena
by Jae Hoon Choi, Jun Hyung Ryu and Seung Pyo Gong
J. Mar. Sci. Eng. 2023, 11(11), 2077; https://doi.org/10.3390/jmse11112077 - 30 Oct 2023
Cited by 1 | Viewed by 1403
Abstract
Although testicular organoids have remarkable potential as testicular models in vitro, there have been few studies about testicular organoids in teleost fish. As a first step to establish a stable culture system for fish testicular organoids, we investigated the efficient conditions for an [...] Read more.
Although testicular organoids have remarkable potential as testicular models in vitro, there have been few studies about testicular organoids in teleost fish. As a first step to establish a stable culture system for fish testicular organoids, we investigated the efficient conditions for an aggregate culture of dispersed testicular cells from adult marine medaka (Oryzias dancena) by evaluating the effects of culture methods and media composition on an aggregate culture. As the results, we found that culturing dispersed testicular cells in an ultra-low attachment 96 well without Matrigel was most effectively able to induce the formation of testicular cell aggregates among the five different methods tested. Subsequently, through media testing, we confirmed that the modified ESM2 was more optimal for this aggregate culture than the media conventionally used in porcine, human, and rat testicular aggregate cultures. Furthermore, we demonstrated that three supplements in the modified ESM2 including fish serum (FS), basic fibroblast growth factor (bFGF), and embryo extracts (EE) did not influence the number and size of the testicular aggregates formed, but fetal bovine serum and other supplements including β-mercaptoethanol, non-essential amino acids, sodium pyruvate, and sodium selenite were affected significantly. Nevertheless, the removal of three supplements (FS, bFGF, and EE) during culture negatively affected scp3 and sox9a expression levels, indicating their necessity. Finally, we identified that the sperms derived from in vitro cultured testicular aggregates were able to produce offspring after fertilization with naturally matured oocytes. The results from this study will provide fundamental information to develop the techniques for fish testicular organoid culture, which will eventually contribute to the development of reproductive biotechnology for aquaculture and the conservation of endangered fish species. Full article
(This article belongs to the Special Issue New Insights into Fish Physiology-Applications Focus: Challenges and Mitigations II)
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15 pages, 3133 KiB  
Article
Dietary Wheat Gluten Alters the Gut Microbiome and Plasma Taurine Levels in European Sea Bass (Dicentrarchus labrax)
by Mary E. M. Larkin and Allen R. Place
J. Mar. Sci. Eng. 2023, 11(5), 1022; https://doi.org/10.3390/jmse11051022 - 11 May 2023
Viewed by 1792
Abstract
Incorporating environmentally sustainable plant-based protein sources into aquafeeds is a priority for the aquaculture industry. Wheat gluten as a plant protein source has been successfully integrated into feeds for several fish species. However, unique nutritional requirements and the potential for intolerances necessitate the [...] Read more.
Incorporating environmentally sustainable plant-based protein sources into aquafeeds is a priority for the aquaculture industry. Wheat gluten as a plant protein source has been successfully integrated into feeds for several fish species. However, unique nutritional requirements and the potential for intolerances necessitate the evaluation of plant-based diets by species. Previous work by our laboratory indicated that wheat gluten at less than 4% inclusion in a compound feed had a negative impact on growth and survival rate in juvenile cobia (Rachycentron canadum). In the current study, we evaluated the effects of wheat gluten inclusion in a plant-based diet in juvenile European sea bass (Dicentrarchus labrax). No major differences were observed in terms of growth rate, plasma biochemical parameters, detectable induction of plasma IgM, IgT, or factors capable of binding gliadin in response to the inclusion of 4% dietary wheat gluten. However, plasma levels of taurine doubled in the fish fed wheat gluten, and there were considerable changes to the intestinal microbiome. Despite these measurable changes, the data suggest that dietary inclusion of 4% wheat gluten is well tolerated by juvenile European sea bass in a plant-based feed formulation. Full article
(This article belongs to the Special Issue New Insights into Fish Physiology-Applications Focus: Challenges and Mitigations II)
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