Fatty acid composition in Chironomid larvae in Lakes Kawaguchi and Shibire, Japan
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概要
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Larvae of Chironomus plumosus, Chironomus nipponensis, Propsilocerus akamusi and Tanypodinae spp. were collected during 1998 and 1999 at Lake Kawaguchi and Lake Shibire in central Japan, and fatty acid compositions of the larvae were examined. Saturated and monounsaturated fatty acids represented 50-80% of total fatty acids; C16:0 (13-32 mol%) and C18:1 (6-23 mol%) were the most abundant saturated and monounsaturated fatty acids, respectively. Polyunsaturated fatty acids (PFUAs) were mainly present as C 18:3 (n-3) and C20:5 (n-3). Tanypodinae spp. also contain a fair amount of C22:6 (n-3), which was not detected in other larvae. After hatching, all larvae showed a decreased level of saturated fatty acids and an increased level of PFUAs. We discuss the functions of PFUAs in Chironomid larvae in relation to their development. The increased level of PFUAs may indicate that they serve important biological functions during development, especially in the metamorphosis in the Chironomid larvae.
- 日本陸水学会の論文
日本陸水学会 | 論文
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