circannual


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Related to circannual: circannual rhythm

circannual

occurring rhythmically every year.
References in periodicals archive ?
Circadian and circannual rhythms in sexual activity and plasma hormones (FSH, LH, testosterone) of five human males.
Studies have found that several factors influence testosterone levels, such as time of day, and on a circannual pattern (e.
Circaseptan (about weekly) and circannual (about yearly) rhythms are examples of infradian rhythms.
Avian circannual clocks: adaptive significance and possible proximate control by energy turnover.