AN ESTIMATOR FOR TOTAL ROAMING DOGS IN A CITY BLOCK USING SIGHT-RESIGHT DATA

The following download uses a set of simplified sight-resight history frequencies for a sample of dogs in a city block to estimate what fraction of the dogs that roam in that block are seen on any one count. A sample of distinctive dogs is identified during the first count and resights of those dogs on a second and third count recorded.  For each identified dog the four possible histories are thus: seen on both the second and third counts; seen on neither the second nor the third count; seen on the third but not the second count; seen on the second but not the third count.  The four frequencies are entered on a screen and an estimate of the fraction of dogs seen on any one count returned along with an estimate of the fraction of dogs that remain in the block from one count to the next. 

SightResight_install.zip

LIST OF ADDITIONAL PROGRAMS

• Sterilisation rates required to stabilise a population
• A regression estimator for a roaming dog population
• An estimator for total roaming dogs in a city block using sight-resight data (allowing for possible emigration)
• An estimator for total roaming dogs in a city block using sight-resight data (allowing for possible heterogeneity)
• A program for using temporary marking of owned dogs to estimate numbers of owned and unowned dogs
• A program for using permanent marking of roaming dogs to estimate their survival
• Population dynamics