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Patch occupancy and dispersal of spruce grouse on the edge of its range in Maine

Canadian Journal of Zoology

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Abstract

We surveyed 18 habitat patches (black spruce (Picea marinana) - tamarack (Larix larcina) wetlands) for spruce grouse (Dendragapus canadensis canadensis) on Mount Desert Island, Maine, during April-May in 1992 and 1993 to determine patch occupancy relative to patch area. We also equipped nine juvenile grouse with radio transmitters to determine movement and habitat use outside of patches during autumn dispersal. The 2 large patches (77 and 269 ha), 5 of 6 medium-sized (11-26 ha) patches, and 1 of 10 small (4-8 ha) patches were occupied. Spruce grouse occupied smaller habitat patches than previously reported, and occupied patches were closer (P < 0.05) to the nearest occupied patch (x = 1.2 km) than were unoccupied patches (x = 2.5 km). Eight of nine juvenile grouse left their natal habitat patch during autumn dispersal, and net dispersal distance (x = 2.3 km) was greater than that reported for grouse in areas with more contiguous habitat. Dispersing juveniles used all major forest types and 33 % of relocations were in deciduous forest. Thus, deciduous forest was not an absolute dispersal barrier.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Patch occupancy and dispersal of spruce grouse on the edge of its range in Maine
Series title:
Canadian Journal of Zoology
Volume
74
Issue:
11
Year Published:
1996
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
1951-1995
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1951
Last page:
1995
Number of Pages:
45