Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Straße 35, 85354Freising, Germany.
Agricultural Biochemistry Department, Faculty of Agriculture, Ain Shams University, P.O. Box 68, Hadayek Shobra, 11241Cairo, Egypt.
J Agric Food Chem. 2023 Feb 1;71(4):2094-2104. doi: 10.1021/acs.jafc.2c07868. Epub 2023 Jan 23.
Wild and farmed rainbow trout were compared with chemical profiling, chemosensory properties, carbon concentration and isotope analyses, 1- and 2-GC/O-MS, GC-FID, and aroma profile analyses. Results were linked with the prokaryotic and eukaryotic microbiological profile of the fish sources using multivariate statistical analysis. Fish from natural environments proved to have better sensory properties in terms of fruity, sweet, and citrusy attributes, compared to farmed fish. However, the farmed fish were found to have higher nutritional value based on their lipid contents. These differences might relate to the introduction of feed extrudates, which could influence the overall quality of fish products. Thereby, malodor episodes linked to musty/earthy off-odor notes related to odorants including geosmin, β-caryophyllene, ()-2,4-nonadienal, and ()-2,4-nonadienal. These compounds, in turn, correlated with , sp., sp., , and abundance and were further affected by oxygen levels in the water column.
对野生和养殖虹鳟鱼进行了比较，包括化学特征分析、嗅觉特性分析、碳浓度和同位素分析、1-GC/O-MS 和 2-GC/O-MS、GC-FID 和香气特征分析。使用多元统计分析将结果与鱼类来源的原核和真核微生物特征相关联。与养殖鱼相比，来自自然环境的鱼在果香、甜味和柑橘味等方面具有更好的感官特性。然而，养殖鱼的脂质含量较高，营养价值更高。这些差异可能与饲料挤压物的引入有关，这可能会影响鱼类产品的整体质量。因此，与霉味/泥土味等异味相关的不愉快气味事件与包括土臭素、β-石竹烯、（）-2,4-壬二烯醛和（）-2,4-壬二烯醛在内的气味物质有关。这些化合物与,,, , 和 的丰度相关，并且进一步受到水柱中氧气水平的影响。
