Fish body fatty acids are expected to be further accurate evaluation.

Recently learned that by the Chinese Academy of Aquatic Sciences Yellow Seawater Research Institute, China Ocean University, Australia Deakin University and the Australian Federal Scientific and Industrial Organization of relevant experts to complete the construction of cultured fish "feed-fish body" fatty acid composition database, and through the construction of a series of mathematical models to quantitatively assess the fatty acids from feed to fish fluid flow process, quantitative analysis of experimental conditions and environmental factors on fatty acids from feed to fish fluid process. This work provides a theoretical basis for fine and accurate evaluation of the relationship between fatty acids in farmed fish feed and fatty acids in fish bodies, and a theoretical basis for the regulation of feed pathways to achieve the nutritional quality of fatty acids in farmed fish.
cultured fish products are the main food source for human access to DHA and other long-chain polyunsaturated fatty acids (LC-PUFA). Because the fatty acid composition of fish body is highly malleable, it is generally believed that "the fatty acid composition of fish body generally reflects the composition of feed fatty acids". However, this rough conceptual description does not accurately and comprehensively reflect the relationship between feed fatty acids and fish fatty acid composition, and studies have found that a variety of factors affect the deposition and metabolism of feed fatty acids in fish bodies. For example, fatty acids of different chain length and desaturation differ significantly in the synthesis, oxidative energy supply and selective deposition of fish, differences in fatty acid metabolism between different species, especially fish with different salinity levels, different nutrient levels and different fat content, feed feeding factors (e.g. feeding cycle and feed fat content) and environmental conditions (e.g. temperature and salinity) in the culture process can also significantly affect the deposition process of fatty acids from feed to fish. Therefore, the fine and accurate evaluation of fatty acids from feed to fish body of the flow process for cultured fish quality evaluation and feed fatty acid management is of great significance.
this work, based on 290 representative documents on the composition of farmed fish feed and fish body fatty acids, a "feed-fish body" fatty acid composition database was constructed. After standardizing the fatty acid data in the database, four basic evaluation parameters were calculated for the "feed-fish body" relationship of individual fatty acids in each data, and the contribution value of the fatty acid monosome to the compositional variance of feed and tissue fatty acids was analyzed in combination with the multi-similarity analysis tools in the ecological evaluation model. Subsequently, the values of environmental factors such as initial weight, nutritional grade, feeding cycle, feed fat level, salinity and temperature of the breeding process were further analyzed with the above evaluation parameters in order to achieve a quantitative assessment of the fatty acid relationship of "feed-fish body" influenced by these factors. The results of the analysis systematically expound the differences between the fatty acid composition of "feed-fish body" in different fatty acids, different tissues, different lipid types and different cultured fish, and reveal and discover many new characteristics and laws in the process of fish fatty acid deposition. This research provides an important methodological innovation for the nutritional quality evaluation of fatty acids in farmed fish.
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