Estimation of the number of free-roaming dogs and dog density in Dhaka City, Bangladesh during January and March 2011.

n1: total number of animals sighted and marked on the first sample
n2: total number of animals sighted on the second sample
m: number of marked animals on the first sample that were re-sighted on the second sample
N is the estimated total population of dogs using Chapman estimates with 95% confidence interval (see Eqs 1 and 2 in the text).
*Total estimated population is the sum of the estimate in each ward
Estimation of the number of free-roaming dogs and dog density in Dhaka City, Bangladesh during January and March 2011.