Population indices and trends of vultures.

Indices and trends were estimated by log-linear Poisson regression from road transect counts in India. Each column shows results for a particular species and time period. Informative transects are those that were surveyed more than once and on which at least one vulture of the species concerned was recorded during the time period. Population indices are estimates of the population density as a proportion of that in the first year of the period shown at the head of each column. A 95% bootstrap confidence interval is shown for each index (in brackets). F tests of significance are shown with P values indicated as; ***PPP