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《Chinese Journal of Animal Nutrition》 2016-07
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Comparative Analysis: Nutritional Component Contents in Cuttlebone of Sepia pharaonis at Different Growth Stages

JIANG Maowang;JIANG Xiamin;LIANG Jingjing;WANG Pengshuai;RUAN Peng;HAN Qingxi;School of Marine Sciences,Ningbo University;  
This study was conducted to study the changes of nutritional component contents in cuttlebone of Sepia pharaonis at different growth stages,in order to provide a theoretical basis for development and utilization of Sepia pharaonis. The contents of nutritional components( including moisture,ash,crude protein,crude fat,polysaccharide,amino acids,fatty acids) and minerals [including 5 kinds of major elements—natrium( Na),kalium( K),magnesium( Mg),aluminium( Al),calcium( Ca),and 8 kinds of trace elements—copper( Cu),iron( Fe),zinc( Zn),selenium( Se),manganese( Mn),chromium( Cd),arsenic( As),strontium( Sr) ] in cuttlebone of Sepia pharaonis at different growth stages( grow ing ages were 60,90,120 and150 d,respectively) were determined using national standard nutritional methods. The results show ed as follow s: among different growth stages,the ash was the main component in cuttlebone of Sepia pharaonis and the content of ash was 89.98% to 92.06%,which was increased with the growth and 150 days of age was significantly higher than other days of age( P 0. 05); crude protein content was 2. 82% to 3. 11%,which was increased with the growth and 150 days of age was significantly higher than 60 days of age( P 0.05); the content of moisture was 3.93% to 6.21%,which was decreased with the growth and 60 days of age was significantly higher than other days of age( P 0. 05); the contents of crude fat and polysaccharide were less compared with other components,which were 0.41% to 0.47% and 0.34% to 0.38%,respectively. A total of 17 amino acids were identified in cuttlebone of Sepia pharaonis among different growth stages,including 7 kinds of essential amino acids( EAA). The contents of total amino acid( TAA),EAA and acidic amino acids( AAA) were 2.79% to 2.93%,0.87% to 0.98% and 0.56% to 0.78%,respectively; the content of AAA was increased with the growth,and 150 days of age was significantly higher than other days of age( P 0.05). The content of glutamate( Glu) was the highest( 0. 31% to 0. 43%) and the content of histidine( His) was the low est( 0.03% to 0.07%) in cuttlebone of Sepia pharaonis among different growth stages. A total of 7 fatty acids were identified,including 3 saturated fatty acids( SFA),1 monounsaturated fatty acids( MUFA) and 3polyunsaturated fatty acids( PUFA). C22∶ 6n-3,C16∶ 0 and C18∶ 0 were the main components of fatty acids,among which C22∶ 6n-3 had the highest value( 35. 68% to 37. 62%). The contents of major elements—Na,Mg,Al and Ca,and trace elements—Cu,Zn and Sr were significantly affected by the growth stage( P 0.05),especially the contents of Ca,Mg and Zn,which were increased with the growth; the contents of heavy metal elements—Cd and As were very low, which were 0. 001 to 0.003 mg/g and 0. 012 to0.030 mg/g,respectively. It is concluded that the cuttlebone of Sepia pharaonis has a high nutritional value,Ca,Mg and Zn contents are rich and increase with the growth. Therefore,it has a good spectacle of opening up and application.
【Fund】: 国家自然科学基金项目(41206114);; 宁波市农业科技专项(2014C11001)
【CateGory Index】: S917.4
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