Evaluation on nutritional quality and differences of segmentations of silver carp and tilapia
In order to systematically clarify the difference of nutritional quality between silver carp(Hypophthal-michthys molitrix)and tilapia(Oreochromis niloticus)from the view of food raw materials,the differences in nutri-tional quality was investigated between silver carp and tilapia,including the traditional edible parts(dorsal muscle,abdomen muscle,belly flesh and tail muscle)and non-traditional edible parts(head,lower jaw,scales,skin and bone)of silver carp with body weight of(3 139.3±93.0)g and tilapia with body weight of(713.6±33.3)g.The systematically nutritional quality evaluation indicated that silver carp and tilapia had moisture from 53.54%to 79.57%,protein from 7.84%to 42.21%,fat from 0.19%to 12.45%and ash from 0.42%to 18.27%.There was significantly higher crude protein in fish scales of the two species than that of other non-traditional edible parts(P<0.05),with the maximal amino acid score and chemical score of fish lower jaw part.In addition,significantly high-er contents of fat,fatty acids,oleic acid and polyunsaturated fatty acids were observed in the belly flesh of silver carp than those in other parts(P<0.05).There were higher contents of EPA and DHA in all parts of silver carp than those in tilapia.The balanced contents of macroelements and microelements in the dorsal muscle,head and fish scale of the two species of fish were shown to be used as good mineral sources.To sum up,there were differ-ences in nutritional quality between silver carp and tilapia,with higher nutritional value of protein in other parts of tilapia than that in silver carp except the belly flesh and skin and higher nutritional value of fatty acids in most parts of silver carp.There was better nutritional balance in the traditional edible parts of the two fish than that in the non-traditional edible parts.According to the needs of different consumer groups,the refined segmentation products can be processed differently to make full use of the whole fish.
万方数据
维普
