Grouse in Space and Time: The Population Biology of a Managed Gamebird : the Report of the Game Conservancy's Scottish Grouse Research Project & North of England Grouse Research Project

Front Cover
Game Conservancy, 1992 - Grouse - 224 pages
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Contents

Introduction History objectives and achievements
2
CHANGES IN NUMBERS OF GROUSE AND OTHER
13
Variation in grouse yields between estates
26
Changes in abundance of foxes crows and stoats on grouse moors
32
Changes in abundance of other moorland animals birds and blue hares
46
The fall in grouse numbers 19751983
56
Factors associated with breeding and winter losses
63
POPULATION BIOLOGY OF LOW DENSITY
67
Worm egg production and resistance to parasite infection
151
The effects of the trichostrongyle worm on grouse survival and breeding
156
Modelling the interaction of grouse and the trichostrongyle worm
161
Noncyclic populations and parasite burdens
164
The treatment of parasitic infections Medicated grit and direct dosing
167
Parasites and predation
171
TICKS AND LOUPING
178
Life cycle of the sheep tick and infestations on grouse
179

Mortality and losses at low grouse density
83
Dispersal patterns of young grouse from low density populations
89
Why does winter predation not increase with grouse density?
95
Annual changes in the territorial behaviour of grouse
100
Spacing behaviour experiments
109
Distraction displays of grouse
113
HEN HARRIER PREDATION AND DISTURBANCE OF GROUSE
120
The impact of hen harriers on red grouse breeding success
121
Hen harrier hunting behaviour
128
Disturbance of grouse by hen harriers during the shooting season
134
POPULATION BIOLOGY OF CYCLIC POPULATIONS THE EFFECT OF THE TRICHOSTRONGYLE WORM
137
Population cycles in red grouse
138
The life cycle of the Trichostrongyle worm Trichostrongylus tenuis
145
Prevalence of louping ill in grouse populations
185
The control of louping ill
191
HEATHER LOSS AND RESTORATION TECHNIQUES
194
The loss and management of heather moorlands
195
Restoration of heather on overgrazed areas
199
Competition for cotton grass flowers in early spring
204
The ecological impact of moorland drainage
206
Status and potential of red grouse in the Spey Valley
211
Red grouse homing for 35 kilometres
214
Grouse shooting in Scotland Analysis of its importance to the economy and environment
215
Publications on red grouse by The Game Conservancy
218
Copyright

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