Independence of circadian entrainment state and responses to melatonin in male Siberian hamsters

BMC Physiology

Table 1 ETV minimum (mean ± SEM) and fraction of hamsters exhibiting threshold gonadal regression in 13L:11D.

	Week 2–4	Week 4–8	ETV minimum	Fraction regressed
Mel capsule	LD	LD	335 ± 71	4 / 8
	LD	SD	370 ± 48	5 / 1 0
	SD	LD	456 ± 27	0 / 7
	SD	SD	455 ± 24	0 / 7
			*p = 0.05	**p < 0.01
Beeswax capsule	LD	LD	386 ± 57	2 / 5
	SD	LD	229 ± 59	3 / 5

*significant main effect of Week 2–4 photoperiod in two-factor ANOVA **significant effect of Week 2–4 photoperiod by Fisher's exact test

ISSN: 1472-6793