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4.6 Conclusion
We hope that this report will be useful as a ready source of information
for conservation practitioners, and as a source of information for
those involved in more strategic conservation policy making, as
well as to the general student of bird populations. The information
presented here is very much the 'tip of the iceberg' of information
held by the BTO, providing a concise overview of the way in which
populations are changing and suggesting areas where further research
and conservation action needs to be taken.
Alerts are raised as a result of declines in the population
sizes of a considerable number of species. These alerts will help
conservation organisations to prioritise future conservation action,
alongside the Population Status of Birds list (Gregory
et al. 2002) and other information.
The information concerning demographic factors contained in this
report will also help conservation organisations to target their
resources more effectively. For declining species of conservation
importance, declines in breeding performance may indicate that conservation
action should be targeted at the breeding season; such responses
may sometimes be masked, however, by density-dependent improvements
in breeding success (Green 1999).
The lack of a decline in breeding performance may suggest that factors
other than nesting success, such as loss of habitat or changes in
survival rates are more likely to be influencing the observed population
declines. A
report of this kind can provide only an initial summary
of such information, and a full assessment of the population dynamics
of a declining species will generally require more detailed investigations
(e.g. Peach et al.
1999, Freeman &
Crick 2003, Robinson
et al. 2004).
Finally, we hope that users of this report will provide
feedback on how the report can be improved. We will welcome comments
on any aspect of this report, as they will help us to produce a
better and more useful next edition.

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