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Vortex

Population Viability Analysis software

 

Vortex is an individual-based simulation of deterministic forces as well as demographic, environmental and genetic stochastic events on wildlife populations. It can model many of the extinction vortices that can threaten persistence of small populations. Vortex models population dynamics as discrete, sequential events that occur according to probabilities that are random variables following user-specified distributions. Vortex simulates a population by stepping through a series of events that describe an annual cycle of a typical sexually reproducing, diploid organism: mate selection, reproduction, mortality, increment of age by one year, dispersal among populations, removals, supplementation, and then truncation (if necessary) to the carrying capacity. The simulation of the population is iterated many times to generate the distribution of fates that the population might experience.

 

Click here to learn about an email discussion group (a "Listserv") for Vortex users.

 

 

 

Downloads:

 

Before downloading, please Register as a user to provide us with information about how Vortex is being used and how we can better serve species conservation.

VortexCover.jpg

 

Note: If the msi installation file does not work for you, try downloading the zip file, extracting the two files, and then running setup.exe.

 

Citation for software:

Lacy, R.C., and J.P. Pollak. 2014. Vortex: A stochastic simulation of the extinction process. Version 10.0. Chicago Zoological Society, Brookfield, Illinois, USA.


 

Creative Commons License
Vortex is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.

References:

 


Vortex10 change Log


Go to Vortex FAQs

 

Go to Vortex Publications 

 


 

Vortex10.org site built by Robert Lacy and JoAnna Kelly

Copyright 2017 Chicago Zoological Society / IUCN/SSC Conservation Breeding Specialist Group