Metabolic and molecular stress responses of European seabass, Dicentrarchus labrax at low and high temperature extremes.
Islam, Md Jakiul, Kunzmann, Andreas, Bögner, Mirko, Meyer, Achim, Thiele, Rajko and James Slater, Matthew (2020) Metabolic and molecular stress responses of European seabass, Dicentrarchus labrax at low and high temperature extremes. Ecological Indicators, 112 . p. 106118. DOI https://doi.org/10.1016/j.ecolind.2020.106118.
Full text not available from this repository.Abstract
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 < 0.05) compared to 16 °C and 24 °C. Hepatosomatic index (HSI), viscera somatic index (VSI), intestine somatic index (ISI) and spleen somatic index (SSI) were significantly (p < 0.05) lower in fish at 8 °C and 32 °C at day 30. Plasma [Na+] and [Cl−] ion concentrations were significantly lower (p < 0.05) in fish reared at 8 °C at day 10, 20 and 30. Plasma triglycerides, lactate, cortisol were significantly (p < 0.05) increased, while plasma glucose, protein and liver energy storage showed the inverse trend in 8 °C and 32 °C reared fish at day 10, 20 and 30. Heat shock proteins (HSP70) gene was significantly (p < 0.05) up-regulated in the dorsal muscle and kidney tissue of fish reared at 8 °C and 32 °C at day 10, 20 and 30. Whereas Interleukin 1β (IL-1β) gene exhibited a similar, but less regular expression with upregulation at day 10 across all four temperature treatments. Insulin growth factor 1 (Igf1) relative expression was decreased significantly in fish reared in 8 °C and 32 °C than in 16 °C and 24 °C at day 10, 20 and 30. European seabass exhibits significant physiological, biochemical and gene expression alterations and marked performance reduction during extreme temperatures of 8 °C and 32 °C. None of the repeatedly measured parameters in the current study indicated a capacity for compensation by physiological adaptation over periods of 10, 20 or 30 days.
Document Type: | Article |
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Programme Area: | PA1 |
Research affiliation: | Infrastructure > Biology Laboratory Ecology > Experimental Aquaculture |
Refereed: | Yes |
Open Access Journal?: | No |
DOI: | https://doi.org/10.1016/j.ecolind.2020.106118 |
ISSN: | 1470160X |
Date Deposited: | 12 Feb 2020 11:18 |
Last Modified: | 26 Mar 2024 13:30 |
URI: | http://cris.leibniz-zmt.de/id/eprint/3335 |
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