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NTIS 바로가기Journal of chemical ecology, v.26 no.10, 2000년, pp.2291 - 2305
Schaaf, Otmar (University of Bayreuth, Department of Animal Ecology II, Universitä) , Baumgarten, Jörn (tsstr. 30, D-95440 Bayreuth, Germany) , Dettner, Konrad (University of Bayreuth, Department of Animal Ecology II, Universitä)
The chemical composition of the prothoracic defensive secretion of the water beetles Graphoderus cinereus and Laccophilus minutus was examined by gas chromatographic–mass spectrometric analysis of trimethylsilylated gland extracts. The main components are 3α,11α-dihydroxy-5β-pregnan-20-one in G. cinereus and 3α,12α-dihydroxy-5β-pregnan20-one in L. minutus. Fully saturated pregnanes have not been found in the prothoracic defensive glands of dytiscids before. Based on tests with synthetic compounds, their biological role was examined in a feeding assay with the minnow Phoxinus phoxinus. Agar pellets containing either steroid strongly deterred feeding.
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