Metabolic and molecular stress responses of European seabass, Dicentrarchus labrax at low and high temperature extremes

• Published in: Ecological indicators 2020-05, Vol.112, p.106118, Article 106118
• Main Authors: Islam, Md Jakiul, Kunzmann, Andreas, Bögner, Mirko, Meyer, Achim, Thiele, Rajko, James Slater, Matthew
• Format: Article
• Language: English
• Subjects: Aquaculture; Climate; Fish physiology; Metabolic-molecular; Mitigation; Temperature extreme
• ISSN: 1470-160X; 1872-7034
• DOI: 10.1016/j.ecolind.2020.106118

[Display omitted] •Growth of European seabass was significantly hampered at cold (8 °C) and warm (32 °C) thermal extremes.•Physiological functions in terms of plasma ions and metabolites were significantly impaired at both cold and warm extremes.•HSP70, IL-1β was up-regulated and Igf1 was down-regulated at the two thermal extremes. Extreme water temperatures related to global climate change represent a significant challenge in terms of fish welfare and aquaculture productivity. Understanding the effect of more frequent and extended extreme temperature events on physiological responses, growth performance and other production-relevant parameters of major aquaculture species are essential for developing suitable mitigation methods and assuring future production. Fish were exposed to 8 °C, 16 °C, 24 °C and 32 °C to evaluate the extreme ambient temperatures effect on growth performance, physiological, biochemical and molecular responses of juvenile European seabass, Dicentrarchus labrax. Fish exposed to 8 °C and 32 °C for 30 days exhibited significantly lower final weight, weight gain, specific growth rate, survival rate, and temperature growth coefficient (p