期刊
MARINE ENVIRONMENTAL RESEARCH
卷 139, 期 -, 页码 122-128出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2018.03.017
关键词
Heat shock; Fatty acid composition; Trematomus bernacchii; Muscle; Gas chromatography-mass spectrometry; Antarctica; Principal component analysis
资金
- Programma Nazionale di Ricerche in Antartide under the project on Chemical Contamination [2013/AZ2.01]
In the Ross Sea region (average temperature of - 1.87 degrees C), shelf water warming up to +0.8-+1.4 degrees C is predicted by 2200, so there is an urgent need to understand how organisms can respond to rising temperatures. In this study, we analyzed the effect of a heat shock on the fatty acid (FM) composition of muscle of the Antarctic teleost Trematomus bernacchii, caught in Terra Nova Bay (Ross Sea), and held in fish tanks at 0, +1 or +2 degrees C, for 1, 5 and 10 days. In general, heat shock produced, beyond a reduction in total lipid content correlated to the temperature, an increase in the percentage of saturated FM, and a decrease in mono-unsaturated FAs; however, the level of poly-unsaturated FM did not seem to directly correlate with temperature. Principal component analysis indicated that both temperature and exposure time affect the composition of FM in the muscle probably through an alteration of the metabolic pathways of FM. In this study, we demonstrated that T. bernacchii was capable to rapidly acclimatize to a heat shock. This study contributes to increasing knowledge on the effect of temperature on the lipid composition of T. bernacchii and is complementary to previous studies on the gene expression and biochemistry of this species face multiple stressors.
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