Feed and Nutrition Group, Institute of Marine Research (IMR), PO Box 1870 Nordnes, N-5817 Bergen, Norway.
Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy.
Food Chem. 2021 Dec 15;365:130500. doi: 10.1016/j.foodchem.2021.130500. Epub 2021 Jun 30.
There is a growing interest in exploiting Antarctic fisheries for human consumption. However, information on how the nutritional qualities of these resources will respond to the predicted seawater warming in the region for the next century is poor. The present research investigates changes in various nutritional indices of dietary importance (e.g. the ratio polyunsaturated to saturated fatty acids, the atherogenicity index, the thrombogenicity index, the hypo-cholesterolemic to hyper-cholesterolemic index, the health-promoting index, the flesh lipid quality and the ratio omega-3 to omega-6 index) by determining the fatty acid composition in muscle of Trematomus bernacchii (an Antarctic fish species) in its natural habitat (-1.87 °C) and warmer temperatures (0.0, 1.0, 2.0 °C). Comparison of the estimated nutritional indices at -1.87 °C with those at warmer temperatures revealed that seawater warming caused changes in the nutritional indices in the range of -12%<Δ < 30%. The observed changes were not statistically significant and ascribed to biological variability. Therefore, the nutritional values of T. bernacchii muscle were preserved after increasing the temperature of its natural habitat by + 4 °C. The present research is the first report describing the nutritional quality indices for an Antarctic fish species and the consequences of seawater warming on the nutritional value of T. bernacchii.
人们对开发南极渔业以满足人类消费的兴趣日益浓厚。然而，关于这些资源的营养价值将如何应对未来一个世纪预计的该地区海水变暖的信息却很少。本研究通过在其自然栖息地（-1.87°C）和较温暖的温度（0.0、1.0 和 2.0°C）下测定 Trematomus bernacchii（一种南极鱼类）肌肉中的脂肪酸组成，调查了各种具有饮食重要性的营养指数（例如多不饱和脂肪酸与饱和脂肪酸的比例、动脉粥样硬化指数、血栓形成指数、低胆固醇与高胆固醇指数、促进健康指数、鱼肉脂质质量和ω-3 与 ω-6 指数比）的变化。将-1.87°C 时估计的营养指数与较温暖温度下的营养指数进行比较发现，海水变暖导致营养指数在-12%<Δ<30%的范围内发生变化。观察到的变化没有统计学意义，归因于生物变异性。因此，在将其自然栖息地的温度升高 4°C 后，T. bernacchii 肌肉的营养价值得以保持。本研究首次报道了一种南极鱼类的营养质量指数以及海水变暖对 T. bernacchii 营养价值的影响。
