1. College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China;
2. Marine Science Research Institute of Shandong Province, Qingdao 266104, China;
3. School of Food and Bioengineering, Jiangsu University, Zhenjiang 212013, China;
4. Quzhou Sturgeon Aquatic Food Technology Development Co., Ltd., Quzhou 324002, China
Abstract：The proximate nutrients, mineral content, amino acid and fatty composition, and histological characteristics of skins of six common sturgeon species were measured, including Siberian sturgeon Acipenser baerii, Russian sturgeon A. gueldenstaedti, kaluga sturgeon Huso dauricus, beluga H. huso, large hybrid sturgeon (H. dauricus♀× A. schrenckii ♂), and small hybrid sturgeon (A. baerii♀× A.schrenckii♂), to compare and evaluate the similarities and differences in their nutritional composition and histological characteristics. The results showed that the skins of the six species of sturgeon were rich in collagen (21.85%—30.47%), types of fatty acids and mineral elements, and the proportion of flavored amino acids was as high as 52.19%—53.04%. Specifically, the highest content of crude protein (37.21%) was found in beluga; kaluga sturgeon had the highest content of unsaturated fatty acid (27 287.63 μg/g)and proportion of flavored amino acids (53.04%); Russian sturgeon was rich in mineral elements, among which the calcium content (18 101.08 mg/kg) was the highest. Furthermore, the results of histological analysis indicated that the collagen fiber bundles of kaluga sturgeon, beluge, and large hybrid sturgeon were tight and thick, while that of Siberian sturgeon, Russian sturgeon and small hybrid sturgeon were small and loose. Overall, this study analyzed the nutrient composition of six different sturgeon skins commonly used in production to better understand their similarities and differences, thereby providing a theoretical background and desirable prospects for promoting the high-value utilization of sturgeon skins.
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2022, Vol. 41 
