Annual

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Related to circannual: circannual rhythm

Annual

Describing a situation, event, or statement that occurs or is filed only once per year. See also: Annual Report.
References in periodicals archive ?
Circannual rhythm of exercise metabolic rate in humans.
Circannual vitamin d serum levels and disease activity in rheumatoid arthritis: Northern versus Southern Europe.
Hibernation and circannual rhythms of food consumption in marmots and ground squirrels.
How do photoperiod, the pineal, melatonin and circannual rhythms interact to coordinate seasonal reproduction in salmonid fish?
This survey edited by Kulczyckowska (genetics and marine biotechnology, Polish Academy of Sciences) examines the current state of knowledge and research into the circadian and circannual biological rhythms in fish.
Circannual cycles of blood plasma freezing point and Na+ and Cl- concentration in Newfoundland winter flounder (Pseudopleuronectes americanus): correlation with water temperature and photoperiod.
Levy and Strain (1982) have also noted that the use of the secretion's chemical composition with chemotaxonomic purposes could be inappropriate considering this a parameter with a large amount of circannual variations associated to bird reproduction cycles, and conditioned by environmental, hormonal and physiological factors.
A rhythm with a period of approximately 1 year is called a circannual rhythm.
An endogenous circannual rhythm of reproduction in a tropical bat, Anoura geoffroyi, is not entrained by photoperiod.