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Circannual Rhythms - Endogenous Annual Clocks in the Organization of Seasonal Processes (Paperback, Softcover reprint of the original 1st ed. 1986)
Loot Price: R2,760
Discovery Miles 27 600
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Circannual Rhythms - Endogenous Annual Clocks in the Organization of Seasonal Processes (Paperback, Softcover reprint of the original 1st ed. 1986)
Series: Zoophysiology, 18
Expected to ship within 10 - 15 working days
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Total price: R2,780
Discovery Miles: 27 800
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In addition to the more or less static properties of the environ
ment, plants and animals must cope with its temporal variations.
Among the most conspicuous temporal changes to which organisms are
exposed are periodic phenomena generated by the rotation of the
earth about its axis, its revolution around the sun, and the more
complex movements of the moon in relation to both sun and earth.
The first two of these astronomical cycles are basic to the
familiar daily and annual rhythms, respectively, in the
environment. The third generates somewhat more complex cycles, such
as those in moonlight and variations in tides. These environmental
cycles have provided challenges and opportunities for organisms to
adjust their physiology and behavior to them. Indeed, the
predictability inherent to these periodic processes has enabled
organisms to evolve innate endogenous rhythmic programs that match
the environmental cycles and allow, in a variety of different ways,
adjustment of biological activities to the cycles of environmental
changes. The endogenous nature of rhythmicity was first clearly
recognized in the 1930's in daily periodicities, the most widely
distributed and best investigated class of biological rhythms of
this type. In the 1950's, demonstrations of endogenous tidal and
lunar rhythms, which occur in some littoral and marine organisms,
ensued. Another decade passed before endogenous annual
periodicities were first demonstrated unambiguously."
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