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Climate change and breeding success: decline of the capercaillie in Scotland
Summary 1. The number of capercaillie in Scotland has fallen since the 1970s. Previous work showed that low breeding success, exacerbated by deaths of fully grown birds flying into forest fences, was… Expand
Effects of testosterone on breeding density, breeding success and survival of red grouse
Territorial intolerance can limit bird numbers by preventing subordinates from holding territories and breeding. We report the first controlled and replicated experiment in a natural population of… Expand
Capercaillie breeding success in relation to forest habitat and predator abundance
Summary 1 The capercaillie Tetrao urogallus is widely valued as a game bird and an indicator of forest ecosystem quality. In Scotland, its numbers have declined since the 1970s, due primarily to… Expand
Capercaillie Tetrao urogallus in Scotland - demography of a declining population
Capercaillie Tetrao urogallus numbers declined in Scottish forests between 1992 and 1997, although the rate (mean 16% per year, 95% CL 1-30%) differed among forests. Hens declined more quickly than… Expand
Injury surveillance at the USTA Boys' Tennis Championships: a 6-yr study.
- M. Hutchinson, R. LaPrade, Q. M. Burnett, R. A. Moss, J. Terpstra
- Medicine and science in sports and exercise
- 1 June 1995
Injuries that required physical or medical assistance were recorded for participants at the United States Tennis Association National Boys' Tennis Championships from 1986-1988, 1990-1992 (N = 1440,… Expand
Population cycles in birds of the grouse family (Tetraonidae)
Publisher Summary The regular population cycles of boreal herbivores such as voles, hares and birds of the grouse family (Tetraonidae) were an early source of wonder in ecology. All tetraonid species… Expand
Experimental Prevention of a Population Cycle in Red Grouse
Red Grouse (Lagopus lagopus scoticus) show unstable population dynamics. The number shot for sport at Rickarton moor in northeast Scotland, for example, has cycled with 10-11-yr periodicity since… Expand
Spatial arrangement of kin affects recruitment success in young male red grouse
Models have shown that population cycles might be driven by time lags resulting from positive feedback between kin structure and population change, coupled with negative feedback between density and… Expand
Experimentally increased aggressiveness reduces population kin structure and subsequent recruitment in red grouse Lagopus lagopus scoticus
Summary 1. According to the ‘territorial behaviour’ hypothesis, red grouse population cycles are caused by delayed density-dependent changes in male aggressiveness influencing recruitment. These… Expand
Screening for anorexia and bulimia nervosa in a college population: problems and limitations.
In relation to prevalence studies, bulimia and anorexia nervosa symptoms have been reported to be surprisingly high, although such studies have relied upon questionnaire data. The present study… Expand