Productivity of the spruce grouse at the southeastern limit of its range
Whitcomb SD, O'Connell AF, Servello FA. 1996. Productivity of the spruce grouse at the southeastern limit of its range. Journal of Field Ornithology. 67(3):422-427
'We measured productivity of the spruce grouse (Dendragapus canadensis canadensis) in patchy black spruce (Picea mariana) habitat along the southeastern limit of its range in mid-coastal Maine. We captured grouse and attached necklace-mounted radio transmitters to hens prior to nesting. Of 19 females monitored, only 26% raised chicks to the late brood-rearing period. Predation was high on hens (37%) and five were killed before hatching eggs. Six (55%) entire broods were lost and only 30% of chicks survived to late summer. Production (No. of chicks/female), an index of productivity, was less than 1 and lower in Maine and Minnesota study areas in black spruce than areas dominated by jack pine (Pinus banksiana) or a mixture of jack pine and spruce with dense undergrowth. Where spruce grouse breed in patchy black spruce communities, immigration from neighboring populations or inter-patch movement by local individuals may be required to maintain viable populations.' /STUDY LOCATIONS:/ /MOUNT DESERT ISLAND/
- Type
- Journal Article
- Authors
- Whitcomb, Scott; O'Connell, Allan; Servello, Frederick
- Units
- ACAD
- Keywords
- Breeding, Distribution, Habitat Utilization, Mount Desert Island, Nests & Nesting, Population Density, Productivity