Content:
Chapter 1 Chairman's advent (page 1): William Mordue
Chapter 2 advent: The hyperlinks among ‘Wet’ and ‘Dry’ body structure (pages 2–6): David S. Saunders
Chapter three team spirit and variety in Insect Photoperiodism (pages 7–25): Sinzo Masaki
Chapter four The Circadian part in Photoperiodic Induction (pages 26–47): C. S. Pittendrigh, J. Elliott and T. Takamura
Chapter five Photoperiod Reception in Spider Mites: Photoreceptor, Clock and Counter (pages 48–64): A. Veerman and M. Vaz Nunes
Chapter 6 Long?Night Summation and Programming of Pupal Diapause within the Flesh?Fly, Sarcophaga argyrostoma (pages 65–96): David S. Saunders and Helen Bradley
Chapter 7 Genetic research of Geographical edition in Photoperiodic Diapause and Pupal Eclosion Rhythm in Drosophila littoralis (pages 97–114): Pekka Lankinen and Jaakko Lumme
Chapter eight Neuronal association of a Circadian Clock within the Cockroach Leucophaea maderae (pages 115–135): Terry L. Page
Chapter nine Circadian?Clock keep an eye on of Hormone Secretion in Samia Cynthia ricini (pages 136–149): Hironori Ishizaki, Akira Mizoguchi and Mariko Fujishita
Chapter 10 Circadian keep an eye on of Haemolymph Ecdysteroid Titres and the Ecdysis Rhythm in Rhodnius prolixus (pages 150–169): C. G. H. metal and E. J. Ampleford
Chapter eleven Photoperiodic rules of Prothoracicotropic Hormone free up in overdue Larval, Prepupal and Pupal levels of Sarcophaga bullata (pages 170–188): Brian Roberts
Chapter 12 Reproductive Endocrinology and Photoperiodism in a Terrestrial Slug (pages 189–203): P. G. Sokolove, E. J. McCrone, J. van Minnen and W. C. Duncan
Chapter thirteen Photoperiodicity, Rhythmicity and Endocrinology of copy within the Snail Lymnaea stagnalis (pages 204–220): J. Joosse
Chapter 14 Physiological facets of the 2 Oscillators That keep an eye on the Timing of Eclosion in Moths (pages 221–239): James W. Truman
Chapter 15 A hormonal foundation for the Photoperiodic keep watch over of Polymorphism in Aphids (pages 240–258): Jim Hardie
Chapter sixteen Environmental signs, the Neuroendocrine approach, and the legislation of Larval Diapause within the Southwestern Corn Borer, Diatraea grandiosella (pages 259–275): G. Michael Chippendale

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Extra info for Ciba Foundation Symposium 104 - Photoperiodic Regulation of Insect and Molluscan Hormones

Example text

Kikukawa (1983), as part of his doctoral study, has extended our work with thermoperiodic effects in the corn borer and has shown a thermoperiodic response curve for diapause induction in constant darkness; the response is suppressed in constant light. The critical thermoperiod is not sharply defined, but it is considerably longer than the critical photoperiod. 42 DISCUSSION Pittendrigh: One would indeed expect that in constant light the pacemaker would be damped out; so one would obtain no response because one cannot entrain a non-existing oscillation.

You mentioned data on the southwestern corn borer, which we study. Kikukawa (1983), as part of his doctoral study, has extended our work with thermoperiodic effects in the corn borer and has shown a thermoperiodic response curve for diapause induction in constant darkness; the response is suppressed in constant light. The critical thermoperiod is not sharply defined, but it is considerably longer than the critical photoperiod. 42 DISCUSSION Pittendrigh: One would indeed expect that in constant light the pacemaker would be damped out; so one would obtain no response because one cannot entrain a non-existing oscillation.

In the only PITTENDRIGH ET AL 28 T - CYCLE t 12 1 LENQTH' IN 1 I 2 4 3 6 4 0 HOURS I I 6 0 7 2 FLESH-FLY n FIG. 1. A sample of Nanda-Hamner transects. ) as a function of the length, in hours ( r ) ,of the entraining light: dark cycle. The duration of the photoperiod (light pulse) is held constant in each panel. The response rises and falls (modulo -24h) as a function of T. (From Pittendrigh 1981a). Temperature for the lower two panels is in "C. case (Drosophilu) where the kinetics of pacemaker phase-shifts has been adequately studied, the full response (even a 12h shift) has been shown to develop nearly instantaneously (Pittendrigh 1974, 1981a).

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