VORTEX is a individual-based simulation program for use in Population Viability Analysis.
VORTEX is used to: -- assess conservation status (degree of threat) for populations of wildlife; -- for planning conservation actions; -- for studying determinants of population dynamics; -- and for teaching about population biology.
VORTEX was written by Robert Lacy, Species Conservation Toolkit Initiative. More information about VORTEX can be obtained from https://scti.tools/vortex/