Download Free Mourning Dove Status Report 1974 Book in PDF and EPUB Free Download. You can read online Mourning Dove Status Report 1974 and write the review.

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%.
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.
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.
Report on activities in the divisions of research.
Mourning dove population indices, as determined from the nationwide Call-Count Survey, decreased from 1972 to 1973 by 7% in the Eastern Management Unit, by 8% in the Central Management Unit, but increased by 8% in the Western Management Unit. The 1973 indices were below the 10-year means, 1963-1972, by 9% in the Eastern Unit, 6% in the Central Unit, and 4% in the Western Unit. Regression analyses of the call-count data for 1963-73 indicate a statistically significant downward trend in dove breeding populations in all management units; mean rates of decline per year were 1% in the Eastern, 2% in the Central and 4% in the Western Unit.