Saunders Insect Clocks

Pergamon International Library of Science, Technology, Engineering and Social Studies
1. Auflage 2014
ISBN: 978-1-4831-8218-6
Verlag: Elsevier Science & Techn.
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 288 Seiten, Web PDF

Insect Clocks is mainly concerned with the phenomena in which ''environmental time'' has a practical implication for the life of insects for them to perform behavioral or physiological episodes at the ''right time'' and season. This text first discusses the concept of rhythms and clocks, along with the seasonal changes in the environment that affect a particular group of organisms. This book then explains circadian rhythms of insects. Photoperiodism and seasonal cycles of development; photoperiodic response, clock, and counter; and other types of insect clock are also tackled. This text concludes by explaining the anatomical location of photoreceptors and clocks. This publication will be invaluable to those interested in studying insects and their development affected by circles of influences.

Autoren/Hrsg.

Saunders, D. S.

Inhaltsverzeichnis

1;Front Cover;1
2;Insect Clocks;4
3;Copyright Page;5
4;Table of Contents;6
5;Preface;8
6;Chapter 1. Introduction: Rhythms and clocks;10
7;Chapter 2. Circadian rhythms of activity in individual insects;15
7.1;A. Activity rhythms in light/dark-cycles;16
7.2;B. The endogenous nature of activity rhythms;17
7.3;C. Exogenous effects;22
7.4;D. Entrainment by light and temperatur;24
8;Chapter
3. Circadian rhythms of activity in populations of insects;32
8.1;A. General properties of the pupal eclosion and other rhythms;33
8.2;B. Population rhythms as "gating" phenomena;40
8.3;C. Entrainment of population rhythms by light and temperature;44
8.4;D. Genetic experiments;58
8.5;E. "Stopping" the cloc;60
8.6;F. Spectral sensitivity and intensity effects;66
9;Chapter
4. Circadian rhythms and physiology: The circadian system;70
9.1;A. Rhythms of cuticle deposition;70
9.2;B. Metabolic rhythms;74
9.3;C. Rhythms in the endocrine and central nervous systems;76
9.4;D. Sensitivity to drugs and insecticides;78
9.5;E. Environmental periodicity and fundamental aspects of physiology;79
9.6;F. Temporal organization and the circadian system;82
10;Chapter
5. Photoperiodism and seasonal cycles of development;86
10.1;A. Dormancy: quiescence and diapause;87
10.2;B. Seasonal morphs;91
10.3;C. Growth rates;94
10.4;D. Migration;96
10.5;E. Miscellaneous photoperiodic phenomena;96
11;Chapter
6. The photoperiodic response;98
11.1;A. Types of response;98
11.2;B. The sensitive and responsive stages;103
11.3;C. Maternal induction of diapause and seasonal forms;104
11.4;D. Factors which modify the photoperiodic response;106
11.5;E. The genetics of the photoperiodic response;121
11.6;F. The spectral sensitivity and the intensity threshold of the photoperiodic response;124
12;Chapter
7. The photoperiodic clock;130
12.1;A. Evidence for the involvement of the circadian system in time measurement;133
12.2;B. Evidence for an hour-glass in time measurement;164
12.3;C. Oscillators and hour-glasses;169
13;Chapter
8. The photoperiodic counter;177
13.1;A. The cumulative effects of photoperiod;178
13.2;B. Interactions between the photoperiodic counter and environmental variables;184
13.3;C. The "programming" of the central nervous system by photoperiod;192
14;Chapter
9. Other types of insect clock;194
14.1;A. The time-memory (Zeitgedächtnis) of bees;194
14.2;B. Time-compensated sun orientation;198
14.3;C. Lunar·, semilunar and tidal rhythms;201
14.4;D. Circannual rhythms and "long-range" timers;206
15;Chapter
10. The anatomical location of photoreceptors and clocks;212
15.1;A. Clocks controlling rhythms of locomotor and stridulatory activity;212
15.2;B. Clocks controlling rhythms of eclosion;221
15.3;C. Photoperiodic clocks;226
16;Appendix A. Glossary and list of symbols used to describe clock phenomena;231
17;Appendix B. List of insects exhibiting rhythmic activity or photoperiodic control;236
18;References;262
19;Index;286