Artificial diets determine fatty acid composition in edible Ruspolia differens (Orthoptera: Tettigoniidae)

dc.contributor.authorRutaro, Karlmax
dc.contributor.authorMalinga, Geoffrey M.
dc.contributor.authorOpoke, Robert
dc.contributor.authorLehtovaara, Vilma J.
dc.contributor.authorOmujal, Francis
dc.contributor.authorNyeko, Philip
dc.contributor.authorRoininen, Heikki
dc.contributor.authorValtonen, Anu
dc.description.abstractThere are increasing interests in rearing edible insects in Africa, but information on how the feeds modify their fatty acids is largely lacking. In this work, the influence of artificial diets on the fatty acid contents and composition in the edible Ruspolia differens (Serville, 1838), in Uganda was assessed. R. differens was reared on the mixtures of six gradually diversified diets of two, three, four, six, eight and nine feeds. The diets were formulated from rice seed head, finger millet seed head, wheat bran, superfeed chicken egg booster, sorghum seed head, germinated finger millet, simsim cake, crushed dog biscuit pellet and shea butter. Fatty acid methyl esters were prepared using direct transesterification method, and analysed using gas chromatography. The contents of saturated, monounsaturated and polyunsaturated fatty acid differed significantly among the diets. The more diverse diets resulted in increased content of the polyunsaturated fatty acids. The n6:n3 ratio differed significantly among the diets and between the sexes, with R. differens fed on the four-feed diet having a higher n6:n3 ratio than those fed on other diets. Also, the fatty acid composition differed significantly among the diets, and diet diversification corresponded with the proportions of polyunsaturated fatty acids, especially linoleic acid. Overall, our results demonstrate that higher levels of essential fatty acids can be achieved by rearing R. differens on highly diversified diets. These findings are important in informing the design of future mass-rearing program for this edible insecten_US
dc.identifier.citationKarlmax Rutaro, Geoffrey M. Malinga, Robert Opoke, Vilma J. Lehtovaara, Francis Omujal, Philip Nyeko, Heikki Roininen, Anu Valtonen , Artificial diets determine fatty acid composition in edible Ruspolia differens (Orthoptera: Tettigoniidae). Aspen (2018), doi:10.1016/j.aspen.2018.10.011en_US
dc.publisherJournal of Asia-Pacific Entomologyen_US
dc.subjectEdible insectsen_US
dc.subjectEdible grasshopperen_US
dc.subjectEssential fatty acidsen_US
dc.subjectFatty acid contenten_US
dc.subjectNutritional compositionen_US
dc.titleArtificial diets determine fatty acid composition in edible Ruspolia differens (Orthoptera: Tettigoniidae)en_US
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