Formal Properties of the Circadian and Photoperiodic Systems of Japanese Quail: Phase Response Curve and Effects of T-Cycles

Abstract

A role for the circadian system in photoperiodic time measurement in Japanese quail is controversial. The authors undertook studies of the circadian and photoperiodic system of Japanese quail to try to identify a role for the circadian system in photoperiodic time measurement. The circadian studies showed that the circadian system acts like a low-amplitude oscillator: It is readily reset by light without significant transients, has a Type 0 phase response curve (PRC), and has a large range of entrainment. In fact, a cycle length that is often used in resonance protocols (LD 6:30) is within the range of entrainment. The authors employed T-cycle experiments; that is, LD cycles with 6-and 14-h photoperiods and period lengths ranging from 18 to 36 h to test for circadian involvement in photoperiodic time measurement. The results did not give evidence for circadian involvement in photoperiodic time measurement: T-cycles utilizing 6-h photoperiods were uniformly noninductive (that is, did not stimulate the reproductive system), whereas T-cycles utilizing 14-h photoperiods were inductive (stimulatory). A good match was observed between the phase-angles exhibited on the T-cycles employing 6-h photoperiods and the predicted phase-angles calculated from a PRC generated from 6-h light pulses.

Keywords

Japanese quail circadian rhythms photoperiodism reproduction phase response curve T-cycles

References

Bünning E (1936) Die endogene Tagersrhythmik als Grundlage der photoperiodischen Reaktion. Ber Btsch Bot Ges 54:590-607.

Bünning E (1960) Circadian rhythms and the time measurement in photoperiodism. Biological Clocks [Special Issue], Cold Spring Harb Symp Quant Biol 25:249-256.

Elliott JA and Goldman BD (1981) Seasonal reproduction: Photoperiodism and biological clocks. In Neuroendocrinology of Reproduction: Physiology and Behavior, NT Adler , ed, pp 377-423, Plenum Press, New York.

Follett BK and Sharp PJ (1969) Circadian rhythmicity in photoperiodically induced gonadotrophin release and gonadal growth in the quail. Nature 223:968-971.

Guyomarc'h C , Lumineau S , and Richard JP (1998) Circadian rhythm of activity in Japanese quail in constant darkness: Variability of clarity and possibility of selection. Chronobiol Int 15:219-230.

Hamner WM (1963) Diurnal rhythm and photoperiodism in testicular recrudescence in the house finch. Science 142: 1294-1294.

King VM , Bentley GE , and Follett BK (1997) A direct comparison of photoperiodic time measurement and the circadian system in European starlings and Japanese quail. J Biol Rhythms 12:431-442.

Kumar V and Tewary PD (1982) Photoperiodic regulation of the gonadal recrudescence in common Indian Rosefinch: Dependence on circadian rhythms. J Exp Zool 273: 297-302.

Opel H (1966) The timing of oviposition and ovulation in the quail (Coturnix coturnix japonica). Br Poult Sci 7:29-38.

10.

Pittendrigh CS (1960) Circadian rhythms and the circadian organization of living systems. Biological Clocks [Special Issue], Cold Spring Harb Symp Quant Biol 25:159-184.

11.

Pittendrigh CS (1965) On the mechanism of the entrainment of a circadian rhythm by light cycles. In Circadian Clocks, J Aschoff , ed, pp 277-297, North-Holland, Amsterdam.

12.

Pittendrigh CS (1972) Circadian surfaces and the diversity of possible roles of circadian organization in photoperiodic induction. Proc Natl Acad Sci USA 69:2734-2737.

13.

Pittendrigh CS and Minis DH (1964) The entrainment of circadian oscillations by light and their role as photoperiodic clocks. Am Nat 902:261-294.

14.

Planck RJ and Johnson HJ (1975) Oviposition patterns and photoresponsivity in Japanese quail. J Interdiscipl Cycle Res 6:131-140.

15.

Puchalski W and Lynch GR (1994) Photoperiodic time measurement in Djungarian hamsters evaluated from T-cycle studies. Am J Physiol 267:R191-R201.

16.

Siopes TD and Wilson WO (1980) A circadian rhythm in photosensitivity as the basis for the testicular response of Japanese quail to intermittent light. Poult Sci 59:868-873.

17.

Underwood H (1994) The circadian rhythm of thermoregulation in Japanese quail I. Role of the eyes and pineal. J Comp Physiol A 175:639-653.

18.

Underwood H , Barrett RK , and Siopes T (1990) The quail's eye: A biological clock. J Biol Rhythms 5:257-265.

19.

Underwood H and Edmonds K (1995) The circadian rhythm of thermoregulation in Japanese quail II. Multioscillator control. J Biol Rhythms 10:234-247.

20.

Underwood H and Hyde LL (1990) A circadian clock measures photoperiodic time in the male lizard Anolis carolinensis. J Comp Physiol A 167:231-243.

21.

Underwood H , Siopes T , and Edmonds K (1997a) Eye and gonad: Role in the dual-oscillator circadian system of female Japanese quail. J Comp Physiol 272:R172-R182.

22.

Underwood H , Wassmer G , and Page T (1997b) Daily and seasonal rhythms. In Handbook of Physiology, Section 13, Comparative Physiology V.II, WH Dantzler , ed, pp 1653-1763, Oxford University Press, New York.

23.

Underwood H , Whitsett JM , and O'Brien TG (1985) Photo-periodic time measurement in the male deer mouse, Peromyscus maniculatus. Biol Reprod 32:947-956.

24.

Vaz Nunes M and Saunders D (1999) Photoperiodic time measurement in insects: A review of clock models. J Biol Rhythms 14:84-104.

25.

Whitsett JM , Cherry J , and Underwood H (1984) Involvement of the circadian system in photoperiodic control of pubertal development in female deer mice, Peromyscus maniculatus. Experientia 40:887-888.