Correction: simulating free-roaming cat population management options in open demographic environments.

There is an error in the third sentence of the Abstract. The definition of TR should be trap-remove, not trap-return. The complete, correct sentence is: Previous analyses that use simulation modeling tools to evaluate alternative management methods have focused on relative efficacy of removal (or trap-remove, TR), typically involving euthanasia, and sterilization (or trap-neuter-return, TNR) in demographically isolated populations.