Egg laying and incubation rhythm of the Chinese Grouse (Tetrastes sewerzowi) at Lianhuashan, Gansu, China

Table 2 Reported reproductive parameters between grouse species

Species	Body weight (g)	Egg laying interval (h)	Clutch size	Egg weight (g)	Incubation (days)	Incubation constancy (%)	Number of daily recesses	Recess duration (min)	References^a
Chinese Grouse (Tetrastes sewerzowi)	327.4	49	6.19	20.5	28–31	92.8	5.0	20.25	1
Willow Ptarmigan (Lagopus lagopus)	525–652	24	7.1, 10.2	23	21–22				2, 3
White-tailed Ptarmigan (Lagopus leucurus)	329	26–44	5.9	21	22–23	95.7, 93.9	3.07		2, 3, 4
Rock Ptarmigan (Lagopus mutus)	427–701	36	6.6	21	21				2, 5
Ruffed Grouse (Bonasa umbellus)	500–586	36	11.5	19	24	96	2.0	20–40	2, 6, 7
Hazel Grouse (Tetrastes bonasia)	370–422	31	8.3	19	23–27	95	2.0	33	2, 8, 9
Blue Grouse (Dendragapus obscurus)	813–867		6.37	33	26				2
Greater Sage-grouse (Centrocercus urophasianus)	770		12	24	26.5	96.1	2.2	26.5	2, 10
Spruce Grouse (Dendragapus canadensis)	456–620		5.8, 7.54	23	21–25			26.4	2, 11
Capercaillie (Tetrao urogallus)	1755–2004		7.07	48	24–28			35	2

^aThe references refer to as follows: 1. Sun (2000), 2. Johnsgard (1983), 3. Wiebe and Martin (1995), 4. Wiebe and Martin (1997), 5. Watson (1972), 6. Bump et al. (1947), 7. Maxson (1977), 8. Semenov-Tyan-Shanskii (1960), 9. Müller (1992), 10. Coates and Delehanty (2008), 11. Naylor et al. (1988)

ISSN: 2053-7166