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Fishes
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Fish Hematology
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Fish Hematology

A special issue of Fishes (ISSN 2410-3888).

Deadline for manuscript submissions: closed (20 May 2025) | Viewed by 1648

Special Issue Editors

Dr. Oscar Basilio Del Rio-Zaragoza

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Guest Editor
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada 22860, Mexico
Interests: aquaculture; nutrition; shrimp; innate immunity
Dr. Emyr S. Peña-Marín

E-Mail Website
Guest Editor
Instituto de Investigaciones Oceanológicas, Universidad Autónoma de Baja California, Ensenada 22860, Baja California, Mexico
Interests: aquaculture; fish nutrition; digestive physiology

Special Issue Information

Dear Colleagues,

Fish aquaculture production is one of the fastest animal productions and will have a significant role in providing food for the world's population in the future; however, intensive aquaculture practices can subject cultured animals to stress. The maintenance of healthy fish is fundamental to the productivity of this sector. Monitoring the health of fish using hematological analysis is especially important as a direct or inferential indicator because this gives information related to the tolerance to a stressor agent or/and illness of the fish. Alterations of environmental factors and the presence of a wide range of pathogens can result in changes in physiological and behavioral responses and even the death of the fish due to stress and is one of the potential problems in the advancement of fish culture. Notwithstanding that the determination of hematological parameters represents a useful tool for evaluating erythropoietic activity, cytotoxic and genotoxic effects, nutritional status, immune system, stress response, fish health and welfare status, etc., there is still a lack of knowledge of blood parameters in fish species of importance for aquaculture and especially in those that have the potential to be farmed.

We are pleased to invite you to submit original research or reviews on the latest advances in fish hematology to this Special Issue. Research areas may include (but are not limited to) the hematological parameters that can facilitate the development of indicators of the fish health status in response to changes related to nutrition, husbandry factors, environmental factors and disease outbreaks.

We look forward to receiving your contributions.

Dr. Oscar Basilio Del Rio-Zaragoza
Dr. Emyr S. Peña-Marín
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. 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

  • hematology
  • blood parameters
  • blood cells
  • health
  • stress
  • physiology
  • nutrition
  • diseases
  • aquaculture

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Published Papers (3 papers)

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Research

18 pages, 732 KiB  
Article
L-Arginine Effect as an Additive on Overall Performance, Health Status, and Expression of Stress Molecular Markers in Nile Tilapia (Oreochromis niloticus) Under Chronic Salinity Exposure
by Andrea Itzel Munguía-Casillas, María Teresa Viana, Miroslava Vivanco-Aranda, Luis Eduardo Ruiz-González, Emyr Saul Peña-Marín and Oscar Basilio Del Rio-Zaragoza
Fishes 2025, 10(8), 387; https://doi.org/10.3390/fishes10080387 - 6 Aug 2025
Viewed by 180
Abstract
Growing freshwater fish in saline environments is being explored as a potential solution to the freshwater shortage. However, growing these organisms in suboptimal salinity conditions leads to chronic stress that can be challenging to manage. To address this goal, it is crucial to [...] Read more.
Growing freshwater fish in saline environments is being explored as a potential solution to the freshwater shortage. However, growing these organisms in suboptimal salinity conditions leads to chronic stress that can be challenging to manage. To address this goal, it is crucial to improve the health of fish through the use of dietary supplements. This study evaluated the effects of varying levels of arginine supplementation on the growth, health status, and expression of stress-related molecular markers in juveniles of Nile tilapia exposed to chronic salinity stress. The tilapia were fed four experimental diets supplemented with 0, 1, 2, and 3% of L-arginine (T0, T1, T2, and T3). After an acclimatization period, the tilapias were exposed to a salinity level of 20‰ for 57 days in a recirculating aquaculture system. Our findings revealed that overall performance parameters were significantly influenced by L-arginine supplementation, except for the condition factor, viscerosomatic index, and hepatosomatic index. Additionally, intermediate levels of L-arginine supplementation positively influenced various blood parameters, including hematological profiles (hemoglobin and leukocytes), blood chemistry (total protein, albumin, globulin, and triglycerides), and the frequency of certain nuclear abnormalities. Furthermore, L-arginine supplementation appeared to regulate the expression of molecular markers related to stress and the immune system. In conclusion, this study indicates that L-arginine supplementation can help alleviate the chronic stress caused by salinity in juvenile Nile tilapia. Full article
(This article belongs to the Special Issue Fish Hematology)
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16 pages, 1657 KiB  
Article
Effect of the Inclusion of Natural Pigments on the Performance and Gene Expression of Immune Response and Oxidative Stress of Oreochromis niloticus Cultured in a Biofloc System
by Andres Elias Castro-Castellon, Maria del Carmen Monroy-Dosta, Aida Hamdan-Partida, Martha Patricia Hernandez-Vergara, Jorge Castro-Mejía, German Castro-Mejia, Arnulfo Misael Martinez-Meingüer and José Antonio Mata-Sotres
Fishes 2025, 10(6), 282; https://doi.org/10.3390/fishes10060282 - 8 Jun 2025
Viewed by 512
Abstract
Tilapia (Oreochromis niloticus) is one of the most important species in aquaculture, so the optimization of its culture by using sustainable strategies is fundamental. The aim of this study was to evaluate the effects of incorporating natural pigments (carrot and beetroot [...] Read more.
Tilapia (Oreochromis niloticus) is one of the most important species in aquaculture, so the optimization of its culture by using sustainable strategies is fundamental. The aim of this study was to evaluate the effects of incorporating natural pigments (carrot and beetroot meal) as carbon sources in a biofloc system on the growth, immune response, and oxidative stress of O. niloticus. The experiment comprised four treatments: clear water as control (CT), biofloc with molasses (TBM), biofloc with carrot meal (TBC), and biofloc with beetroot meal (TBB). Results showed that biofloc helped to maintain optimal water quality and high survival rates, but specifically, TBC treatment achieved the highest growth rates and feed conversion ratio, along with elevated leukocyte counts, indicating improved health and immunity. Gene expression analysis revealed enhanced antioxidant activity (sod, gpx) and modulated immune responses (tnf-α, il-1β), particularly under thermal stress. Carrot meal emerged as an effective carbon source in biofloc systems, promoting growth, immune resilience, and oxidative stress resistance in tilapia, while beetroot meal improved pigmentation. These findings highlight the potential of natural pigments to enhance aquaculture sustainability and productivity. Full article
(This article belongs to the Special Issue Fish Hematology)
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13 pages, 1348 KiB  
Article
Morphometric, Nutritional, and Blood Analyses in Hybrid Striped Bass (Morone chrysops x Morone saxatilis, Walbaum 1972) Reared in a Recirculating Aquaculture System (RAS) Implant in Sicily, Italy
by Francesca Aragona, Syed Sikandar Habib, Francesco Fazio, Alessandro Zumbo, Antonino Costa, Kristian Riolo, Alessia Giannetto and Vincenzo Parrino
Fishes 2025, 10(6), 278; https://doi.org/10.3390/fishes10060278 - 6 Jun 2025
Cited by 1 | Viewed by 407
Abstract
Hybrid striped bass (HSB), a cross between white bass (Morone chrysops) and striped bass (Morone saxatilis), has garnered attention in aquaculture due to its adaptability, rapid growth, and high market value. This study investigates the morphometric, nutritional, and blood [...] Read more.
Hybrid striped bass (HSB), a cross between white bass (Morone chrysops) and striped bass (Morone saxatilis), has garnered attention in aquaculture due to its adaptability, rapid growth, and high market value. This study investigates the morphometric, nutritional, and blood characteristics of HSB reared in a recirculating aquaculture system (RAS) in Sicily, Italy, over a 22-month grow-out period. The fish were managed under standardized feeding and water quality protocols, with weekly monitoring of the physicochemical parameters. A total of 21 clinically healthy fish, averaging 571.33 ± 129.32 in body weight, were randomly sampled in the spring season from a commercial RAS facility equipped with biological filtration, UV sterilization, and seasonally regulated water parameters. The results revealed strong positive correlations between the morphometric parameters and blood indices, such as red blood cell (RBC) count, hemoglobin (Hb) levels, and hematocrit (Hct), highlighting their importance as health indicators. The proximate composition revealed an average moisture content of 75.55 ± 1.49, crude protein at 20.29 ± 0.26, total lipid at 4.25 ± 0.97, and ash content at 1.69 ± 0.17. Additionally, statistical analyses, including a principal component analysis (PCA), identified relationships between body size, nutritional content, and blood parameters, emphasizing the role of body size in influencing nutritional and health outcomes. The findings of this study are crucial for optimizing farming protocols and improving the health and productivity of HSB in RAS under Mediterranean conditions. Full article
(This article belongs to the Special Issue Fish Hematology)
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