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Mourning dove population indices, as determined from the nationwide Call-Count Survey, decreased from 1973 to 1974 by 3% in the Eastern Management Unit, but increased by 2% in the Central Management Unit, and by 21% in the Western Management Unit. The 1974 indices were below the 10-year means (1964-1973) by 11% in the Eastern Unit and 3% in the Central Unit, but 19% above the long-term mean in the Western Unit. Regression analyses of the call-count data for 1964-1974 indicate a downward trend in dove breeding populations in all management units; mean rates of annual decline were 2% in the Eastern Unit, 1% in the Central Unit, and 2% in the Western. The trends for the Eastern and Central Units were statistically significant. From 1971 to 1974, Western Unit population indices increased by 46%.
This report includes Mourning Dove Call-count Survey information gathered over the last 36 years within the conterminous United States. Trends were calculated for the most recent 2- and 10-year intervals and for the entire 36-year period. Between 2000 and 2001, the average number of doves heard per route decreased significantly in the Eastern and Central Management Units. No change was detected for the Western Unit. Over the most recent 10 and 36-year periods, significant declines were indicated for doves heard in the Central and Western Units. Additionally, in the Eastern Management Unit, a significant decline was detected over the most recent 10 years while there was no trend indicated over 36 years. In contrast, for doves seen over the 10-year period, a significant increase was found in the Eastern Unit while no trends were found in the Central and Western Unit. Over the 36-year period, no trend was found for doves seen in the Eastern and Central Units while a decline was indicated for the Western Unit.
Mourning dove population indices, as determined from the nationwide Call-Count Survey, increased from 1974 to 1975 by 10% in the Eastern Management Unit, remained unchanged in the Central Management Unit, and decreased by 3% in the Western Management Unit. The 1975 indices were below the 10-year means (1965-1974) by 4% in the Eastern and Central Units, but the index was 18% above the long-term mean in the Western Unit. Regression analyses of the call-count data for 1965-1975 indicate a downward trend in dove breeding populations in all management units; mean rates of annual decline were 2% in the Eastern and Central Units, and less than 1% in the Western Unit.
Mourning dove population indices, as determined from the nationwide Call-Count Survey, increased from 1975 to 1976 in the Central and Western Management Units by 8% and 32%, respectively, but decreased by 1% in the Eastern Unit. The 1976 indices were above the most recent 10-year means (1966-1975) by 5% in the Central Unit and 54% in the Western Unit, but the index was below the long-term mean by 3% in the Eastern Unit. Linear regression analyses of the call-count data for 1966-1977 indicate a downward trends in the Eastern and Central Management Units with mean annual rates of annual decrease of 2% and 1% respectively.