三种沼虾肌肉营养成分差异研究OA

This study collected samples from aquaculture and natural waters in Zhejiang Province(20 individu-als per species,3 replicates per group,total 60 individuals)to understand the differences in muscle nutritional composition among Macrobrachium rosenbergii,M.hainanense,and M.nipponense,evaluate their nutritional value,and provide a basis for differentiated utilization of resources.Body weight,body length,and meat yield were meas-ured,followed by systematic analyses of basic nutritional composition,mineral content,fatty acid profiles,and amino acid content.The results indicated that M.rosenbergii exhibited significantly greater body weight,body length,and meat yield compared to the other two species.Regarding basic nutritional components,M.hainanense had the highest crude protein content(20.81±0.46)%,whereas M.nipponense had the highest moisture content(76.95±0.52)%.M.rosenbergii showed a significantly higher ash content(2.06±0.09)%.Amino acid analysis revealed that M.hainanense possessed the highest total amino acid and total essential amino acid contents,along with the most favorable proportion of essential amino acids(37.77%).M.rosenbergii was notable for its higher methionine content[(0.41±0.06)g/100 g].In terms of fatty acid composition,M.nipponense and M.rosenbergii contained higher total polyunsaturated fatty acids,while M.hainanense was richer in arachidonic acid.Analysis of nutritional elements showed that M.rosenbergii had significantly higher levels of calcium,magnesium,and iron.M.hainanense contained the highest potassium level,and M.nipponense exhibited the highest sodium content.In conclusion,the three Macrobrachium prawn species exhibit distinct nutritional profiles.This research provides a scientific basis for evaluating their nutritional value and supports their differentiated utilisation.