Reference : The digestive enzymes and acidity of the pellets regurgitated by raptors
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
Life sciences : Anatomy (cytology, histology, embryology...) & physiology
The digestive enzymes and acidity of the pellets regurgitated by raptors
Leprince, Pierre mailto [Université de Liège - ULiège > > GIGA - Neurosciences >]
Dandrifosse, Guy mailto [Université de Liège - ULiège > Services généraux (Faculté de médecine) > Relations académiques et scientifiques (Médecine) >]
Schoffrniels, Ernest [ > > ]
Biochemical Systematics and Ecology
Pergamon Press - An Imprint of Elsevier Science
Yes (verified by ORBi)
[en] Falconidae ; Strigidae ; Aves ; egested pellet ; digestion
[en] The activity of six digestive enzymes (amylase, chitinase, trypsin, chymotrypsin, carboxypeptidase A, pepsin) was examined in the water-soluble contents of the pellets egested by ten species of raptors (kestrel, saker, lanner, goshawk, barn owl, tawny owl, little owl, long-eared owl, African great-owl and steppe eagle). All the enzymes studied were present in the pellets from these birds, except for chitinase which was not detected in the pellets of the goshawk and the steppe eagle, and amylase and carboxypeptidase absent in the material egested by the lanner. The origin of the enzymes studied was examined. Pancreatic enzymes, which are present in the pellets, arise from a reflux of intestinal fluid into the stomach. The importance of this phenomenon is discussed. The acidity of the pellets was measured. Relations existing between the type of food, characteristics of the pellet and the digestive process in raptors are analysed. The evolutionary advantage of pellet egestion is discussed.
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