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发表于 2025-3-21 18:27:13
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弄污
发表于 2025-3-21 22:03:10
Evidence for Circannual Rhythms,tury, their existence was not demonstrated before the early 1960’s. The most compelling evidence then was provided by the work of Pengelley and Fisher (1957, 1963) with golden-mantled ground spuirrels (.). Figure 2.1 shows the seasonal changes in body weight and food consumption, as well as the occu
符合你规定
发表于 2025-3-22 02:43:39
Properties of Free-Running Circannual Rhythms,und squirrels (.), those of body weight and other parameters in an eastern chipmunk (.) and the cycles of molt in garden warblers (.) and blackcaps (.) have been found to continue for at least five, six, and nine cycles, respectively (Table 2.1). This means that the circannual clock can function ess
ensemble
发表于 2025-3-22 05:01:39
Synchronization of Circannual Rhythms,hapters. Under natural conditions, on the other hand, their period normally matches that of the natural year. This implicates the existence of zeitgebers, i.e., seasonally varying environmental factors that are capable of synchronizing (entraining) circannual rhythms with the yearly cycle of the sea
纬度
发表于 2025-3-22 10:03:53
Mechanisms of Circannual Organization,lation of overt circannual functions by basic rhythmic processes. The chapter covers a wide and heterogenous field whose content was not easy to structure. The difficulties were further aggravated by the fact that the few investigations that have been devoted to problems of circannual physiology hav
MOTTO
发表于 2025-3-22 13:43:26
Adaptive Significance of Circannual Rhythms,cannual rhythms function only in connection with external seasonal zeitgebers that synchronize them with the natural year and hence the question arises whether these external factors could not do the same job alone. As with circadian rhythms (Enright 1970) there appears to be no convincing answer to
MOTTO
发表于 2025-3-22 18:54:39
Ludger Kolhoff,Peter-Ulrich Wendt,Iris Bothe this question as yet, but two general hypotheses about the biological significance of circannual rhythms merit special consideration. They will be discussed in the following sections (6.1.1 and 6.1.2).
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发表于 2025-3-23 00:23:06
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热情赞扬
发表于 2025-3-23 04:19:09
0720-1842most 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
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发表于 2025-3-23 06:43:26
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