Differences in the dimensions of diurnal and nocturnal pellets of the barn owl,Tyto alba
作者:
Franca Guidali,
Giorgio Pigozzi,
期刊:
Italian Journal of Zoology
(Taylor Available online 1996)
卷期:
Volume 63,
issue 2
页码: 157-161
ISSN:1125-0003
年代: 1996
DOI:10.1080/11250009609356124
出版商: Taylor & Francis Group
关键词: Birds;Tyto alba;Pellets;Feeding behaviour
数据来源: Taylor
摘要:
Linear dimensions and weight of barn owl pellets collected at a hay‐loft and at a roost‐site were examined. Pellets ejected in the hayloft during nocturnal hunting activity were significantly smaller and lighter than those ejected at the roost‐site during resting periods in daylight hours. This observation is in agreement with the “pelote diurne et pelote nocturne” theory suggested by Guerin (1932). Linear dimensions and weight of pellets varied from one to another season. Thus, it was suggested that the feeding tactics exhibited by barn owls may affect the content and the linear dimensions and weight of pellets; moreover, it was pointed out that further studies are necessary on pellet characteristics in habitats where barn owl faces spatial and temporal variations in the availability of its most important food resources.
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