Clutch desertion and re-nesting in pied flycatchers: an experiment with progressive clutch removal
Article Abstract:
The adaptiveness of desertion and re-nesting behaviors in pied flycatchers (Ficedula hypoleuca) is examined. These behaviors are considered to be vital elements of fitness when the threat of predation is common. The clutches of pied flycatchers were experimentally reduced by removing one egg daily until nest desertion occurred. Majority of the deserting females re-nested in the study area. They tended to desert one-egg nests, while non-re-nesting females tended to desert empty nests. There was partial support for the hypothesis that clutch desertion and re-nesting are adaptive behaviors.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Migratory orientation of pied flycatchers: interaction of stellar and magnetic information during ontogeny
Article Abstract:
The interaction between magnetic compass and star compass during ontogeny were studied in hand-reared young pied flycatchers later released into outdoor aviaries with a full view of the sky. Controls preferred seasonally appropriate migratory direction. Pied flycatchers reared to be oriented to magnetic north turned by 120 degrees anticlockwise preferred a mean of 199 degrees clockwise from controls. However, a group reared on magnetic north orientation turned 120 degrees clockwise and showed scattered orientation.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1992
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Development of migratory orientation in pied flycatchers in different magnetic inclinations
Article Abstract:
A study of the influence of magnetic conditions on the migratory orientation in pied flycatchers shows that celestial rotation during the pre-migratory period enables the birds to identify which end of the magnetic compass points toward wintering area. Birds that are hand-raised without exposure to the sky shows unimodal preference for migration in Germany but a bimodal preference in Latvia. Unimodal preference is observed in Latvian birds exposed to a rotating planetarium sky.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1995
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