Comparative Study Of The Nutritional Components And Texture Properties Of Abalone Muscle

Abalone is a kind of valuable seafoods,ranking first in the "eight treasures of the Sea".Its muscle is tender and delicious,rich in nutrients,and meets the requirements of a healthy diet with high protein and low fat.In recent years,the export production of abalone in China decreased year by year and the domestic market was increased,which means that abalone with high nutritional value began to be concerned by the national people.However,the effects of hybridization,diet,season,and culture patterns on the nutritional quality of abalone have not been clarified.In this paper,the nutritional components and texture properties of abalone foot muscle under different hybrids,different diets,different seasons and different culture modes were analyzed.The above problems were solved by comparing the results,so as to guide the breeding behavior of farmers and the consumption behavior of consumers and provide some references for the cultivation of improved varieties.1.Comparative study on the nutritional components and textural properties of abalone muscle of different varieties:study on Haliotis discus hannai(DD),H.fulgens(FF),H.hannai ?x H.fulgens ?(DF),H.gigantean(GG)?H.gigantean ?x H.hannai ?(GD)with the same culture environment,the same season and the same age to determine the nutritional components and textural properties.The results showed that DF and GD had certain advantages over their parents in fullness,crude protein and taurine content.In the delicious amino acids profile,DF and FF were rich in delicious amino acids,while GG had the highest proportion of bitter amino acids(25.10±1.35%).In the fatty acid profile,the order of the nutritional values of five varieties from high to low was DD,DF,GD,FF and GG.The GG had the highest springness and fracturability,but the FF had the lowest fracturability.DF had no advantage over their parents in texture properties.In conclusion,the effect of hybridization on the nutritional quality of abalone foot muscle was complex,which needs further study and discussion.2.Comparative study on the nutritional components and textural properties of abalone muscle of different diets:DD and DF with the same age were fed with Gracilaria lemaneiformis(LX),Laminaria japonica(HD)and artificial feed(SL)respectively.The glycogen content was highest in SL group(13-18%DW),and lowest in LX group(2-7%DW).The total delicious amino acids in SL group(3.0-3.5 g/100g)were higher than those in HD group(2.5-2.7 g/100g)and LX group(2.3-2.8 g/100g),while the order of bitter amino acids proportion was LX group(24-27%)>HD group(22-24%)>SL group(20-22%).In the fatty acids profile,the order of the nutritional values from high to low was LX-DF,LX-DD,HD-DD,HD-DF,SL-DD,SL-DF.The fracturability in HD group was higher than that in LX group and SL group.The comprehensive evaluation results showed that the nutritional quality of the SL group was the best,so it could be supplemented with artificial feed in the actual feeding,so as to improve the nutritional quality of abalone.3.Comparative study on the nutritional components and textural properties of abalone muscle of different seasons:the nutritional quality of DD and DF foot muscles in November(autumn),February(winter),May(spring)and August(summer)in the same culture environment with the same diet was analyzed.The seasonal change of glycogen content was mainly affected by the reproductive cycle.In both DD and DF,the mineral content in abalone muscle was slightly higher in November and August than in February and May.Overall,the nutritional qualirty of DD and DF in winter and spring was higher than that in summer and autumn.4.Comparative study on the nutritional components and textural properties of abalone muscle of different modes:study on the nutritional quality of DD and DF muscle under the south-north relay mode and south mode(cultured in southern China throughout the year),the results showed that the delicious amino acid content of abalone under the south mode was 25.7%higher than that under the south-north relay mod,but the nutritional value of fatty acids was lower.Compared with the abalone under the south mode,the moisture content in the foot muscle of relay abalone was 4.1%higher,while the content of crude protein was 23.3%lower.All the texture parameters of DF under the south-north relay mode were lower than other groups.Compared with DD under the south mode,DD in the south-north relay mode has higher content of SFA and cholesterol in its foot muscles,and lower content of crude protein,taurine,delicious amino acid,EPA+DHA and selenium.Compared with DF cultured in southern China throughout the year,DF cultured in the south-north relay mode has lower values of crude protein,delicous amino acid and texture parameters in the foot muscle,and higher contents of glycogen,collagen and fatty acids.Therefore,the influence of the south-north relay mode on the quality of DF is relatively complex,which needs further research and exploration.