منابع مشابه
The sun compass revisited
Many animals, and birds in particular, are thought to use directional information from the sun in the form of a time-compensated sun compass, with predictably deviated orientation under clock shift being regarded as the litmus test of this. We suggest that this paradigm obscures a number of other ways in which solar-derived information could be important in animal orientation. We distinguish be...
متن کاملCompass Gait Revisited
It has been established that a suitably designed unpowered mechanical biped may \walk" down an inclined plane all by itself and eventually acquire a stable periodic gait. The characteristics of this periodic gait (e.g., velocity, time period) depend on the geometry of the biped and the slope of the plane. The energy to maintain the periodic motion comes from the conversion of the biped's gravit...
متن کاملSun-Compass Orientation in Mediterranean Fish Larvae
Mortality is very high during the pelagic larval phase of fishes but the factors that determine recruitment success remain unclear and hard to predict. Because of their bipartite life history, larvae of coastal species have to head back to the shore at the end of their pelagic episode, to settle. These settlement-stage larvae are known to display strong sensory and motile abilities, but most wo...
متن کاملThe depth of the honeybee's backup sun-compass systems.
Honeybees have at least three compass mechanisms: a magnetic compass; a celestial or sun compass, based on the daily rotation of the sun and sun-linked skylight patterns; and a backup celestial compass based on a memory of the sun's movements over time in relation to the landscape. The interactions of these compass systems have yet to be fully elucidated, but the celestial compass is primary in...
متن کاملSun Compass Orientation by Juvenile Green Sea Turtles (Chelonia mydas)
– Juvenile green turtles occupy home ranges on shallow reefs that parallel the southeastern coast of Florida. When disturbed, the turtles often flee eastward toward deeper water. We captured turtles at night and recorded their orientation during the next 2 days while they swam tethered inside a large circular outdoor pool and were exposed to the sun. The turtles from 2 reef sites were significa...
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ژورنال
عنوان ژورنال: Animal Behaviour
سال: 2014
ISSN: 0003-3472
DOI: 10.1016/j.anbehav.2014.09.005