Population viability analysis (PVA) is used to assess the probability that a biological population
will persist for a specified period of time. Such models are typically cast as Markov processes
that may include age, stage, sex and metapopulation structures, density-dependence and
ecological interaction processes. They may also include harvesting, stocking, and thresholds that trigger interventions. Here we present Numerus PVA, which is a web app that includes
extensible user-selected options. Specifically, Numerus PVA allows for the specification of one
to ten age classes, one or two sexes, single population or meta-population configurations with 2 or 3 subpopulations, as well as density-dependent settings for inducing region-specific carrying capacities. Movement among subpopulations can be influenced by age, meta-population connectivity, and attractivity of regions based on the relative fitness of the youngest age classes in each region. Simulations can be carried out deterministically or stochastically, with a user-specified combination of demographic and environmental processes.

Numerus PVA is freely available for running directly on any browser and device. Numerus PVA is easily modified by users familiar with the Numerus Software Platform.

Click here to access the manuscript describing this application:
A Numerus Population Viability and Harvesting Analyses Web App by Getz, Muellerklein, Salter, Carlson, Lyons and Seidel.

Click here to access Numerus PVA