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 cocks despite the sex ratio in chicks favouring females. A probable explanation is that adult cocks li...

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Veröffentlicht in:Ibis (London, England) England), 2000-04, Vol.142 (2), p.259-267
Hauptverfasser: MOSS, ROBERT, PICOZZI, NICHOLAS, SUMMERS, RON W., BAINES, DAVID
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BAINES, DAVID
description 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 cocks despite the sex ratio in chicks favouring females. A probable explanation is that adult cocks lived longer. Juvenile survival was less than adult survival, largely because juveniles were more likely to die from hitting fences. Although poor reproduction was probably the main cause of the decline, this might not have occurred had fence strikes been substantially fewer.
doi_str_mv 10.1111/j.1474-919X.2000.tb04865.x
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source Wiley Online Library Journals Frontfile Complete
subjects Animal and plant ecology
Animal, plant and microbial ecology
Animals
Aves
Biological and medical sciences
British Isles, Scotland
Demecology
Fundamental and applied biological sciences. Psychology
Tetrao urogallus
Vertebrata
title Capercaillie Tetrao urogallus in Scotland - demography of a declining population
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