Migratory cues
نویسندگان
چکیده
منابع مشابه
Polarized light cues underlie compass calibration in migratory songbirds.
Migratory songbirds use the geomagnetic field, stars, the Sun, and polarized light patterns to determine their migratory direction. To prevent navigational errors, it is necessary to calibrate all of these compass systems to a common reference. We show that migratory Savannah sparrows use polarized light cues from the region of sky near the horizon to recalibrate the magnetic compass at both su...
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Migrating monarch butterflies (Danaus plexippus) use a time-compensated sun compass to navigate from eastern North America to their overwintering grounds in central Mexico. Here we describe the neuronal layout of those aspects of the butterfly's central complex likely to establish part of the internal sun compass and find them highly homologous to those of the desert locust. Intracellular recor...
متن کاملFuelling decisions in migratory birds: geomagnetic cues override the seasonal effect.
Recent evaluations of both temporal and spatial precision in bird migration have called for external cues in addition to the inherited programme defining the migratory journey in terms of direction, distance and fuelling behaviour along the route. We used juvenile European robins (Erithacus rubecula) to study whether geomagnetic cues affect fuel deposition in a medium-distance migrant by simula...
متن کاملMagnetic cues and time of season affect fuel deposition in migratory thrush nightingales (Luscinia luscinia).
Bird migration requires high energy expenditure, and long-distance migrants accumulate fat for use as fuel during stopovers throughout their journey. Recent studies have shown that long-distance migratory birds, besides accumulating fat for use as fuel, also show adaptive phenotypic flexibility in several organs during migration. The migratory routes of many songbirds include stretches of sea a...
متن کاملCalibration of magnetic and celestial compass cues in migratory birds--a review of cue-conflict experiments.
Migratory birds use multiple sources of compass information for orientation, including the geomagnetic field, the sun, skylight polarization patterns and star patterns. In this paper we review the results of cue-conflict experiments designed to determine the relative importance of the different compass mechanisms, and how directional information from these compass mechanisms is integrated. We f...
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ژورنال
عنوان ژورنال: Nature Reviews Cancer
سال: 2004
ISSN: 1474-175X,1474-1768
DOI: 10.1038/nrc1302