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Analysis and comparison of biochemical composition in squid ink between wild and cultured Sepia pharaonis

JIANG Mao-wang;JIANG Xia-min;GAO Xiao-lan;WANG Peng-shuai;RUAN Peng;HAN Qing-xi;School of Marine Sciences,Ningbo University;  
This study was conducted to provide a basis for the research and development of the nutrient composition in squid ink between wild and cultured Sepia pharaonis. The moisture,crude ash,crude protein,crude fat,polysaccharide,amino acids,fatty acids and minerals were determined by national standard nutritional method. The results showed as follows: the moisture of wild and cultured Sepia pharaons squid ink was not significantly different( P 0. 05),whereas other basic nutrient contents( dry weight basis) were significantly different( P 0. 05). The content of polysaccharide was abundant and in wild squid ink( 3. 25%) in cultured squid ink( 3. 98%). Two kinds of squid ink contained 7 kinds of essential amino acids,10 kinds of non-essential amino acids and 9 kinds of medicinal amino acids,with wild squid ink essential amino acids( 3. 24%) with cultured squid ink( 3. 32%); and wild squid ink medicinal amino acids( 5. 86%) cultured squid ink( 6. 23%),accounting for 56. 78%,65. 71% of total amino acids,respectively. Only five kinds of fatty acids were determined in two kinds of squid inks,and the content of unsaturated fatty acids were significantly different( P 0. 05),with the wild squid ink( 41. 46%) with cultured squid ink( 29. 18%). 4 kinds of constant elements( Na,Ca,K and Mg) and 7 kinds of trace elements( Cu,Fe,Zn,Al,Mn,Sr and As) were determined,and 8 kinds of elements showed significant difference( P 0. 05) with the exception of Mg,Mn and Al. The trace element( Zn) was high,with cultured squid ink( 5. 40 ± 0. 71) mg/g with wild squid ink( 3. 89 ± 0. 19) mg/g. In conclusion,cultured Sepia pharaonis squid ink has higher nutritional value,medicinal and health care function,with promising further development.
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