Annual variation

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Related to Annual variation: seasonal variation
(Astron.) the yearly change in the right ascension or declination of a star, produced by the combined effects of the precession of the equinoxes and the proper motion of the star.

See also: Variation

References in periodicals archive ?
For most species studied here, observed annual variation in fruit abundance most likely reflects variations in both the resources available for, and the resources allocated to, fruit production.
magnirostris) to correct for annual variation (see Gibbs and Grant 1987).
207), the annual variation of body mass was quite similar for both sexes, with the highest values from April to September and the lowest from eecember to February (Fig.
The prices of clothes and footwear climbed up by 7% in terms of annual variation, due to the rise by 5.
Develop water regulation schedules and capacities that promote the protection of wetlands and flatwoods communities, provide annual variation in water depth and hydroperiod in response to climatic inputs, and enhance habitats for wildlife without adversely affecting adjacent landowners.
Findings showed a clear annual variation in the decay rate of a radioactive isotope called chlorine 36, with the highest rate in January and February and the lowest rate in July and August, over a period from July 2005 to June 2011.
The fact that the highest observed population rate was [approximately equal to] 50% greater than the lowest rate suggests that annual variation in norovirus activity may account for a considerable proportion of what otherwise seems to be unspecified.
Another potential mechanism that could account for annual variation in size of litters is residual effects of reproduction in prior years (Lourdais et al.
Gareth Jones, ASCL secretary, said he had been "receiving a stream of comment about the huge annual variation in 16-19 funding allocated to LEAs and subsequently schools".
It asks interested parties to reply to a series of questions on the best way to apply the precautionary principle when setting fishing opportunities for stocks where scientists are unable to provide a quantitative forecast, and the possibility of going beyond the 15% maximum annual variation in TAC in the case of stocks which are persistently outside biological limits.
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