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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The scientific strategy of the BTO Ringing Scheme
Auteurs :	Stephen R. Baillie, Auteur ; R. W. Furness, Auteur ; J. A. Clark, Auteur ; R. E. Green, Auteur ; A. G. Gosler, Auteur ; S. J. Ormerod, Auteur ; W. J. Peach, Auteur ; D. A. Stroud, Auteur ; W. J. Sutherland, Auteur ; J. D. Wilson, Auteur
Type de document :	Article
Dans :	Ringing & Migration (19(Suppl.) Nov., 1999)
Article en page(s) :	S129-S143
Résumé :	1 This strategy aims to increase the contribution which ringing makes to conservation science and ornithological research, recognising that the primary outputs of the scheme are scientific publications based on data gathered by volunteer ringers. The strategy envisages a greater involvement of ringers in planned projects that are designed to provide specific types of information. Clear advice on priority species and categories of birds (eg age classes, seasons of ringing, breeding vs roosting) to be ringed and recaptured will be given to those ringing outside centrally organised projects. 2 The research programme will focus on two main topics, population dynamics and migration and movements. In addition research on life-histories, moult and condition should be conducted when opportunities allow. 3 The Ringing Scheme makes a vital contribution to studies of population dynamics by providing data on survival rates and productivity, and sometimes also on numbers. Population dynamics models based on such data can make an important contribution to understanding the causes of population declines. Thus ringing provides a key component of the BTO's Integrated Population Monitoring Programme. 4 Better demographic data can be collected through planned projects which have a specified study design and which concentrate on gathering mark-recapture data for survival estimation. The highly successful Constant Effort Sites (CES) Scheme will be maintained and enhanced. High priority projects for further development are demographic monitoring of farmland birds, ringing and retrapping adults for survival rate estimation (using species-specific techniques for a range of species and habitats), standardised wader ringing on estuaries and a seabird ringing programme (including both mass ringing for recoveries and the collection of mark-recapture data). Five other monitoring projects are also proposed. 5 Analyses of ringing and recovery data will continue to have an important role because they allow pre-breeding (eg first-year) survival to be estimated. It is essential that adequate samples of pulli, juveniles and adults attributable to known breeding populations are ringed. 6 Priorities for in-house analytical work should be given to work that is of high priority within the Trust's overall strategy, particularly studies of rapidly declining species of conservation interest (BOCC list/Biodiversity Action Plan). Emphasis will often fall on species and issues of which data can be integrated across schemes or across species. High priority projects are analyses of demographic data for declining species on the BOCC/Biodiversity Action Plan list, demographic analyses of estuarine wader populations and analyses of seabird demography. 7 The production of an Atlas of Bird Migration based on ring recoveries is a high priority. This will be a flagship publication for the Ringing Scheme and should rapidly become a key reference for conservationists, policy-makers, bird watchers and ecologists. 8 More detailed analyses of existing ring recovery data should be undertaken, particularly in relation to specific applied questions. Studies of long-time changes in seabird movements and of partial migration are proposed. 9 Planned projects to investigate specific questions concerned with movements and migration should be developed. Standardised catching at migration sites, using methods similar to those of the recent ESF project, could be used to investigate habitat use, turnover rates and weight gain. The movement patterns of wintering thrushes could be investigated through a project involving both ringing and field observations. Further work on the ecology of Palaearctic-African migrants in Africa should be encouraged.

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