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Fishes
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Salmon Aquaculture
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Salmon Aquaculture

A Special Issue of Fishes (ISSN 2410-3888) belonging to the section "Sustainable Aquaculture".

Deadline for manuscript submissions: 20 November 2026 | Viewed by 752

Editors

Dr. Jose Luis Muñoz

E-Mail Website
Guest Editor
Centro i~Mar, Universidad de Los Lagos, Puerto Montt 5480000, Chile
Interests: fish physiology; fish endocrinology; fish stress; chronobiology
Special Issues, Collections and Topics in MDPI journals
Dr. Luis Vargas-Chacoff

E-Mail Website
Guest Editor
Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile
Interests: ecotoxicology; fish biology; signaling pathways; fish physiology; fish metabolism; fish stress; fish osmoregulation; aquaculture
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Salmon aquaculture is facing increasing challenges associated with climate change, environmental variability, and the need to improve fish welfare and production sustainability. This Special Issue aims to address these challenges by exploring the interactions among physiology, health, stress, welfare, and sustainability in salmon aquaculture.

We invite the submission of original research articles and reviews that provide new insights into salmon biology and contribute to the development of more resilient and sustainable production practices. Particular attention will be given to the effects of climate change, future perspectives for the sector, and the role of emerging technologies and system improvements in enhancing performance, welfare, and environmental outcomes.

Topics of interest include, but are not limited to, the following:

  • Salmon physiology and environmental responses;
  • Health, disease, and host resilience;
  • Stress responses and welfare indicators;
  • Climate change impacts and future scenarios;
  • Innovative technologies and precision approaches;
  • System optimization and improvement strategies;
  • Environmental and economic sustainability.

This Special Issue aims to integrate multidisciplinary perspectives, highlight future directions, and provide relevant scientific evidence to support advances in salmon aquaculture.

Dr. Jose Luis Muñoz
Dr. Luis Vargas-Chacoff
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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fishes 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

  • salmon physiology
  • salmon health
  • salmon stress and welfare
  • climate change and salmon farming
  • technological innovation and sustainability
  • salmon aquaculture

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Published Papers (1 paper)

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Research

15 pages, 3139 KB  
Article
Disruption of Osmotic Balance and Metabolic Shifting in Oncorhynchus kisutch Under Hypoxic Stress: Implications for Salmon Aquaculture Climate Resilience
by Luis Vargas-Chacoff, Ricardo Oyarzún-Salazar, Oscar de Lázaro, Pedro Cortés, Kurt Paschke and José Luis P. Muñoz
Fishes 2026, 11(7), 420; https://doi.org/10.3390/fishes11070420 - 16 Jul 2026
Viewed by 431
Abstract
As climate changes worldwide, aquaculture is increasingly exposed to stressors such as warming, altered ocean chemistry, increased CO2 “ocean acidification”, and reduced dissolved oxygen (DO) (i.e., hypoxia). Hypoxic events may also occur naturally during upwelling, when nutrient-rich but low-oxygen deep waters reach [...] Read more.
As climate changes worldwide, aquaculture is increasingly exposed to stressors such as warming, altered ocean chemistry, increased CO2 “ocean acidification”, and reduced dissolved oxygen (DO) (i.e., hypoxia). Hypoxic events may also occur naturally during upwelling, when nutrient-rich but low-oxygen deep waters reach the surface, a process that may intensify with climate change along coastal areas such as the U.S. West Coast and Chile. The aim of this study was to determine the effects of hypoxia on several osmoregulatory organs and tissues of Oncorhynchus kisutch, including gills, kidney, intestine (foregut, midgut, and hindgut), muscle, red blood cells, and brain. Fish were exposed for 28 days to four hypoxic conditions (60, 50, 35, and 25% DO) and a normoxic control. Plasma chloride increased significantly at 25% DO, while plasma pH decreased significantly only under this condition. Plasma osmolality and calcium showed only non-significant tendencies. NKA activity decreased significantly in gills at 50, 35, and 25% DO and in kidney under all hypoxic conditions; however, kidney H+-ATPase remained unchanged. Gill H+-ATPase decreased significantly only at 35 and 25% DO. Intestinal responses varied among segments, whereas muscle and red blood cells showed higher NKA activity at 35% DO, with no significant changes in H+-ATPase activity. Overall, prolonged hypoxia affected osmotic regulation in a tissue-specific way, with reduced NKA activity in key osmoregulatory organs and compensatory NKA responses in peripheral tissues, which may indicate a shift in energy use toward oxygen transport under severe hypoxia. Full article
(This article belongs to the Special Issue Salmon Aquaculture)
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