Circannual Clocks

Circannual Clocks

Annual Biological Rhythms

1st Edition - January 1, 1974

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  • Editor: Eric Pengelley
  • eBook ISBN: 9780323146760

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Circannual Clocks: Annual Biological Rhythms documents the Proceedings of a Satellite Symposium of the 140th Meeting of the American Association for the Advancement of Science held in San Francisco, California, February 25, 1974. The purpose of the symposium was to summarize the present state of knowledge on endogenous annual rhythms (circannual clocks), and to point out their biological significance and importance. The presentations included studies on the following: the circannual rhythms of an arthropod, the cave crayfish, Orconectes pellucidus inermis, and a cnidarian, Campanularia flexuosa; the occurrence, manifestation, and importance of circannual rhythms in birds with different migratory habits; and the importance of circannual rhythms in hibernating mammals. Also covered are the relationships between circannual rhythms and endogenous lunar and tidal rhythms; circannual rhythm of reproduction in male European starlings; the adaptational value of internal annual clocks in birds; the expression and suppression of the circannual antler growth cycle in deer; and circannual rhythms in man.

Table of Contents

  • Participants


    Dedication to Professor William Rowan

    Biographical Sketch of Professor Rowan

    Relation of Light to Bird Migration and Developmental changes, Professor Rowan's Paper of 1925, Reprinted from Nature

    Circannual Rhythmicity in Invertebrates

    Circannual Rhythms in Birds with Different Migratory Habits

    Circannual Rhythmicity in Hibernating Mammals


    Evidences for Blood-Borne Substances Which Trigger or Impede Natural Mammalian Hibernation

    External and Internal Components of the Mechanism Controlling Reproductive Cycles in Drakes

    Relationships between Circannual Rhythms and Endogenous Lunar and Tidal Rhythms

    Physiological and Biochemical Reflections of Circannual Rhythmicity in the European Hedgehog and Man

    Circannual Rhythm of Reproduction in Male European Starlings (Stemm vulgaris)

    The Adaptational Value of Internal Annual Clocks in Birds

    Expression and Suppression of the Circannual Antler Growth Cycle in Deer

    Aspects of Circannual Rhythms in Man

    Circannual Rhythms in Circadian Perspective

Product details

  • No. of pages: 538
  • Language: English
  • Copyright: © Academic Press 1974
  • Published: January 1, 1974
  • Imprint: Academic Press
  • eBook ISBN: 9780323146760

About the Editor

Eric Pengelley

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