title: Composition of uropygial gland secretions of birds of prey.
abstract: The chemical composition of the uropygial gland secretion of five species of birds of prey was investigated by gas liquid chromatography-mass spectroscopy technique, and the results are discussed from the chemotaxonomical point of view. The secretion is a complex mixture of monoester waxes, the fatty acids of which are mainly dimethyl-branched, with the first substituent in 2 position and the other near the methyl end of the molecule. Mono-, trimethyl-, and unbrached fatty acids also are observed. The wax alcohols are mainly mono- and dimethyl-substituted. Unbranched alcohols and traces of trimethyl-substituted alcohols also were detected. Chemotaxonomically, the birds of prey differ from all orders hitherto investigated. The degree of substitution increases from the Falconidae to the Accipitridae.
mesh_terms: D000818:Animals; D001717:Birds / Q000145:classification / Q000378:metabolism*; D002849:Chromatography, Gas; D005227:Fatty Acids / Q000032:analysis*; D005233:Fatty Alcohols / Q000032:analysis*; D013058:Mass Spectrometry; D012627:Sebaceous Glands / Q000032:analysis*; D013045:Species Specificity; D014885:Waxes / Q000032:analysis* / Q000378:metabolism
chemical_list: D005227:Fatty Acids; D005233:Fatty Alcohols; D014885:Waxes