Molecular studies involved in thermal stress for Dicentrarchus labrax, Sparus aurata and Oncorhynchus mykiss
Abstract
Heat stress is a major environmental variable affecting survival, behavior, and physiology of fish, especially in the context of global climate warming. In recent years, research on heat stress in fish has expanded rapidly, focusing on both organism-level molecular responses and broader impacts on wild and farmed populations. Based on the literature, this review provides a holistic synthesis of molecular responses to heat stress in commercially significant fish species in Türkiye, namely Dicentrarchus labrax (Linnaeus, 1758), Sparus aurata (Linnaeus, 1758), and Oncorhynchus mykiss (Walbaum, 1792), associated with stress-protein induction (e.g., heat shock proteins), antioxidant defense modulation (e.g., superoxide dismutase, catalase activity), immune system alterations (e.g., pro-inflammatory cytokines), and metabolic adjustments. Understanding the genetic and molecular alterations that emerge under heat stress may contribute to strategies aimed at improving aquaculture performance in the face of ongoing thermal warming. This review may also serve as a useful reference for protecting fish health and production sustainability under intensifying thermal stress. Although previous reviews have addressed thermal stress in fish broadly, and in Mediterranean or aquaculture contexts, reviews jointly synthesizing the molecular heat-stress responses of D. labrax, S. aurata, and O. mykiss - particularly with reference to Turkish aquaculture - appear to be limited. This review may provide a practical and phased biomarker-based framework to support early-warning monitoring and climate-resilient management in Türkiye’s aquaculture sector.
Keywords
Ethical Statement
References
- Abdel-Tawwab, M., Omar, A. A., Khalil, R. H., Selema, T. A., Elsamanooudy, S., El-Saftawy, H. A., & Abdel-Razek, N. (2025). Influences of thermal stress on the growth biometrics, stress indicators, oxidative stress biomarkers, and histopathological alterations in European seabass, Dicentrarchus labrax, juveniles. Fish Physiology and Biochemistry, 51(2), 70. https://doi.org/10.1007/s10695-025-01470-6
- Alfonso, S., Gesto, M., & Sadoul, B. (2021). Temperature increase and its effects on fish stress physiology in the context of global warming. Journal of Fish Biology, 98(6), 1496–1508. https://doi.org/10.1111/jfb.14599
- Amir, F., Muchlisin, Z. A., Nur, F. M., Fadli, N., Siti-Azizah, M. N., Wilkes, M., & Marimuthu, K. (2022). Effect of increasing water temperature on the physiology and gill histology of barramundi, Lates calcarifer (Pisces, Perciformes) fingerlings. International Aquatic Research, 14, 263–273.
- Beitinger, T. L., & Bennett, W. A. (2000). Quantification of the role of acclimation temperature in temperature tolerance of fishes. Environmental Biology of Fishes, 58, 277–288. https://doi.org/10.1023/A:1007618927527
- Benítez-Dorta, V., Caballero, M. J., Betancor, M. B., Manchado, M., Tort, L., Torrecillas, S., & Montero, D. (2017). Effects of thermal stress on the expression of glucocorticoid receptor complex linked genes in Senegalese sole (Solea senegalensis): Acute and adaptive stress responses. General and Comparative Endocrinology, 252, 173–185. https://doi.org/10.1016/j.ygcen.2017.06.022
- Bertotto, D., Poltronieri, C., Negrato, E., Richard, J., Pascoli, F., Simontacchi, C., & Radaelli, G. (2011). Whole body cortisol and expression of HSP70, IGF-I and MSTN in early development of sea bass subjected to heat shock. General and Comparative Endocrinology, 174(1), 44–50. https://doi.org/10.1016/j.ygcen.2011.08.003
- Brett, J. R. (1971). Energetic responses of salmon to temperature. A study of some thermal relations in the physiology and freshwater ecology of sockeye salmon (Oncorhynchus nerka). American Zoologist, 11(1), 99–113. https://doi.org/10.1093/icb/11.1.99
- Chang, C. H., Huang, J. J., Yeh, C. Y., Tang, C. H., Hwang, L. Y., & Lee, T. H. (2018). Salinity effects on strategies of glycogen utilization in livers of euryhaline milkfish (Chanos chanos) under hypothermal stress. Frontiers in Physiology, 9, 81. https://doi.org/10.3389/fphys.2018.00081
Details
Primary Language
English
Subjects
Fisheries Management, Aquaculture
Journal Section
Review
Early Pub Date
June 9, 2026
Publication Date
June 25, 2026
Submission Date
March 10, 2026
Acceptance Date
May 26, 2026
Published in Issue
Year 2026 Volume: 15 Number: 2