CUCKOO CUCULUS-CANORUS PARASITISM ON ACROCEPHALUS WARBLERS IN SOUTHERN MORAVIA IN THE CZECH REPUBLIC

Citation
A. Moksnes et al., CUCKOO CUCULUS-CANORUS PARASITISM ON ACROCEPHALUS WARBLERS IN SOUTHERN MORAVIA IN THE CZECH REPUBLIC, Journal fur Ornithologie, 134(4), 1993, pp. 425-434
Citations number
29
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ornithology
Journal title
ISSN journal
0021-8375
Volume
134
Issue
4
Year of publication
1993
Pages
425 - 434
Database
ISI
SICI code
0021-8375(1993)134:4<425:CCPOAW>2.0.ZU;2-S
Abstract
The Reed Warbler, Acrocephalus scirpaceus, in the Lednice area, Southe rn Moravia in the Czech Republic, was parasitized by the Cuckoo, Cucul us canorus, at a rate of at least 18.0 %. The Cuckoo eggs showed poor mimesis with the Reed Warbler eggs, but showed a greater resemblance t o the eggs of other species breeding in the area, including the Great Reed Warbler, A. arundinaceus. This latter species was also parasitize d, but we did not find enough nests to obtain a reliable estimate for the mte of parasitism. The parasitized Reed Warblers rejected the Cuck oo eggs at a high rate (42.1 %) and therefore both the hatching succes s and the breeding success of the Cuckoo was considerably lower than s hown by comparable results from Britain. On the background of these re sults (poor mimesis of the Cuckoo eggs and a high rejection rate by th e hosts) the question of the degree of specialization versus generalis m in the Cuckoo's host preference is discussed.