Bird population trends as shown by chick ringing data
Open Access
- 1 October 1984
- journal article
- research article
- Published by Taylor & Francis in Ringing & Migration
- Vol. 5 (2) , 113-120
- https://doi.org/10.1080/03078698.1984.9673839
Abstract
An index was derived from the annual chick ringing totals for 48 species, over the years 1950–1980 inclusive, and compared with indices calculated from the Common Bird Census and Waterways Bird Survey. Significant correlations were obtained for 18 species and it was concluded that the chick index could be used to examine population trends for these species. However, because of an absence of correlation in 30 species, it was concluded that the chick index presented here cannot generally be used as a population indicator. For the 18 species showing significant correlations, population trends over the 31 year period are described.Keywords
This publication has 9 references indexed in Scilit:
- Population Trends Indicated by Birds Ringed in SwedenOrnis Scandinavica, 1982
- Habitat occupancy and regulation of clutch size in the European KestrelFalco tinnunculusBird Study, 1982
- Population changes for waterways birds, 1979–80Bird Study, 1981
- Bird population changes for the years 1979–80Bird Study, 1981
- Farming influences on the food and hunting of KestrelsBird Study, 1980
- Population changes for waterways birds, 1974–78Bird Study, 1979
- The use of annual ringing and nest record card totals as indicators of bird population levelsBird Study, 1969
- Movements and mortality of British KestrelsFalco tinnunculusBird Study, 1968
- An enquiry into the recent breeding status of some of the smaller birds of prey and crows in BritainBird Study, 1965