Title

Tracking the seasons: the internal calendars of vertebrates

UMMS Affiliation

Department of Neurology

Date

8-10-2007

Document Type

Article

Subjects

Adaptation, Physiological; Animals; Biological Clocks; Environment; *Seasons; Vertebrates

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Animals have evolved many season-specific behavioural and physiological adaptations that allow them to both cope with and exploit the cyclic annual environment. Two classes of endogenous annual timekeeping mechanisms enable animals to track, anticipate and prepare for the seasons: a timer that measures an interval of several months and a clock that oscillates with a period of approximately a year. Here, we discuss the basic properties and biological substrates of these timekeeping mechanisms, as well as their reliance on, and encoding of environmental cues to accurately time seasonal events. While the separate classification of interval timers and circannual clocks has elucidated important differences in their underlying properties, comparative physiological investigations, especially those regarding seasonal prolactin secretions, hint at the possibility of common substrates.

Rights and Permissions

Citation: Philos Trans R Soc Lond B Biol Sci. 2008 Jan 27;363(1490):341-61. Link to article on publisher's site

DOI of Published Version

10.1098/rstb.2007.2143

Related Resources

Link to Article in PubMed

Journal Title

Philosophical transactions of the Royal Society of London. Series B, Biological sciences

PubMed ID

17686736