Comparison of Lipid Components between Two Species of Sand Lance, Ammodytes hexapterus and Ammodytes personatus, in Northern Hokkaido

Lipid components of two species of sand lance Ammodytes hexapterus and Ammodytes personatus caught in the region east of Cape Soya, in July and September 1989, were compared. The total lipid contents in whole body, muscle and viscera of Ammodytes personatus were 8.7-12.0%, 6.8-7.3% and 37.6-45.3%, respectively, and those values were higher than those from A. hexapterus (4.7-7.4%, 2.8-4.3% and 5.7-17.3%, respectively). By contrast, the values of gonad somatic index (GSI: gonad weight/body weight x 100) of A. personatus (males: 0.3 and females: 0.3-0.4) were lower than those of A. hexapterus (males: 2.2-11.0 and females: 2.0-4.6). Fatty acids of more than 1% were 14:0, 16:0, 18:0, 16:1(n-7), 18:1(n-9), 18:1(n-7), 20:1(n-11), 20:1(n-9), 22:1(n-11 and n-13), 20:5(n-3) and 22:6(n-3). The contents of monoenoic acids such as 20:1(n-11), 20:1(n-9) and 22:1(n-11 and n-13) in total lipids of whole body as well as muscle were higher in A. personatus than in A. hexapterus.