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Productivity of the spruce grouse in fragmented habitat at the edge of its range

June 16, 2010

We measured productivity of the Spruce Grouse (Dendragapusc anadensicsa nadensis) 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 < 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.

Citation Information

Publication Year 1996
Title Productivity of the spruce grouse in fragmented habitat at the edge of its range
Authors S.D. Whitcomb, A.F. O'Connell, F. A. Servello
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Field Ornithology
Index ID 5223415
Record Source USGS Publications Warehouse
USGS Organization Patuxent Wildlife Research Center