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Article
Robert A. Robinson, Auteur ; Stephen N. Freeman, Auteur ; Dawn E. Balmer, Auteur ; Mark J. Grantham, AuteurCapsule Productivity in the UK Cetti's Warbler population is constant, but overwinter survival has become increasingly dependent on winter temperatures. Aims To demonstrate how constant effort (CE) ringing can be used to estimate productivity of[...]
Article
Stephen N. Freeman, Auteur ; David G. Noble, Auteur ; Stuart E. Newson, Auteur ; Stephen R. Baillie, AuteurCapsule A method for producing and validating long-term population indices using data from the Common Birds Census and its successor, the Breeding Bird Survey, is described. Aim To investigate a means of combining site-specific records from two [...]
Article
Stephen N. Freeman, Auteur ; David G. Noble, Auteur ; Stuart E. Newson, Auteur ; Stephen R. Baillie, AuteurCapsule A method for producing and validating long-term population indices using data from the Common Birds Census and its successor, the Breeding Bird Survey, is described. Aim To investigate a means of combining site-specific records from two [...]
Article
Stephen N. Freeman, Auteur ; Robert A. Robinson, Auteur ; Jacquie A. Clark, Auteur ; Bridget M. Griffin, Auteur ; Sue Y. Adams, AuteurUnderstanding demography is critical for understanding the causes underlying population declines, and for initiating and monitoring policies to reverse them. A method of fitting demographic models directly to avian count data recorded at a sampl[...]
Article
Stephen N. Freeman, Auteur ; Stuart E. Newson, AuteurWe discuss a log-linear model for series of regular bird counts taken at a number of survey sites. The model is parameterized in terms of annual growth rates rather than actual indices of abundance, as is more frequently done. This not only perm[...]
Article
Stephen N. Freeman, Auteur ; Panagiotis Besbeas, AuteurIntegrated population modelling techniques combine information from population surveys and independent demographic studies to estimate population size, survival and productivity rates simultaneously. We review the development of the approach, an[...]
Article
Stephen P. Brooks, Auteur ; Stephen N. Freeman, Auteur ; Jeremy J. D. Greenwood, Auteur ; Ruth King, Auteur ; Chiara Mazzetta, AuteurFor species that are still widespread, obtaining accurate and precise measures of population change inevitably means gathering representative sample data rather than undertaking a complete census. In the UK, a system of raising 'alerts' utilises[...]
