Chironomus plumosus (Diptera, Insecta) larvae as a source of essential fatty acids in feed of carp fry
2011
Živić, I., Faculty of Biology, Belgrade (Serbia) | Trbojević, D., Institute of Meat Hygiene and Technology, Belgrade (Serbia) | Živić, M., Faculty of Biology, Belgrade (Serbia) | Bjelanović, K., Faculty of Biology, Belgrade (Serbia) | Stanković, M., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Vukojević, D., Faculty of Agriculture, Belgrade - Zemun (Serbia) | Marković, Z., Faculty of Agriculture, Belgrade - Zemun (Serbia)
Conclusions: Crude protein content was 6,61% (pond L1) and 6.18% (pond L2) in Chironomus plumosus larvae. Fat content was 0,49% and 0,73%. Water content was 88,95% in L1 and 89,62% in L2. Fat content of the Chironomidae larvae from the pond L1 contained 45.36% saturated and 53.96% unsaturated fatty acids, while fat content of larvae from the pond L2 contained 53.47% saturated and 46.42% unsaturated fatty acids. Among the polyunsaturated (essential) fatty acids isolated from the Chironomidae larvae, the most abundant was ω-6 linoleic acid (21,37%), followed by omega-3 linolenic (3,21%) and omega-3 eikosapentaenoic acid. Linoleic acid content in chironomidae larvae from the pond L2 was lower - 9,78%, omega-3 eicosapentaenoic acid content was 0,45%, and linolenic acid content was higher – 7,78%. Among saturated fatty acids, palmitic (26,15% i.d. 32,67%) following stearic (10,75% in L1 and 10,82% in L2) acid dominated in Chironomus plumosus larvae. Oleic acid was most common among monounsaturated fatty acids (12,63% in L1 and 15,96% in L2), followed by palmitoleic acid (6,86 ie. 4,20%) The lack of PUFA with 22 carbon atoms is probably related to low enzimatic activity of Chironomidae larvae for the synthesis of these acids from their precursor, PUFA with 18 carbon atoms. The measured quantity of omega-3 and omega-6 fatty acids from Chironomus plumosus larvae was 0,21 in the pond L1 and 0,81 in the pond L2, which is sufficient for the nutritional requirements of carp.
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