Vortex

Basic Package Attributes
Attribute	Value
Title	Vortex
Short Description	VORTEX is an individual-based simulation model for population viability analysis (PVA).
Long Description	VORTEX is an individual-based simulation model for population viability analysis (PVA). This program will help you understand the effects of deterministic forces as well as demographic, environmental, and genetic stochastic (or random) events on the dynamics of wildlife populations. VORTEX models population dynamics as discrete, sequential events (e.g., births, deaths, catastrophes, etc.) that occur according to defined probabilities. The probabilities of events are modeled as constants or as random variables that follow specified distributions. Since the growth or decline of a simulated population is strongly influenced by these random events, separate model iterations or “runs” using the exact same input parameters will produce different results. Consequently, the model is repeated many times to reveal the distribution of fates that the population might experience under a given set of input conditions.
Version	9.99
Project Started	1993
Last Release	5 years, 1 month ago
Homepage	http://www.vortex10.org/Vortex10.aspx
Citations	Lacy RC, VORTEX: a computer simulation model for population viability analysis, Wildlife Research, Jan. 1, 1993 [Abstract ]
GSR Certification	This simulator has not yet been evaluated for GSR Certification. Learn more about or request GSR Certification .

Detailed Attributes
Attribute Category	Attribute
Target
Type of Simulated Data	Genotype at Genetic Markers, Sex Chromosomes (Requires complex use of features of the model ),
Variations	Biallelic Marker, Multiallelic Marker, Other (Phenotypes; with user-specified inheritance mechanism),
Simulation Method	Forward-time,
Input
Data Type	Allele Frequencies, Other (Extensive data on demographic rates),
File format	Genepop, XML (Will be available in version 10.), Program Specific,
Output
Data Type	Genotype or Sequence, Phenotypic Trait, Individual Relationship (Pedigree information), Demographic (Extensive reporting of demographic data), Diversity Measures,
Sequencing Reads
File Format	Genepop, Program Specific,
Sample Type	Extended or Complete Pedigrees,
Phenotype
Trait Type	Binary or Qualitative, Quantitative (Possible, but with sophisticated use of functions in the program), Multiple,
Determinants	Environmental Factors (Possible, but with difficulty), Gene-Environment Interaction,
Evolutionary Features
Demographic
Population Size Changes	Bottleneck, Carrying Capacity,
Gene Flow	Stepping Stone Models, Island Models, Sex or Age-Specific Migration Rates, Admixed Population, User-defined Matrix,
Spatiality
Life Cycle	Age structured, User-Defined transition matrices,
Mating System	Random Mating, Monogamous, Polygamous, Selfing, Age- or Stage-Specific, Assortative or Disassortative (With complicated use of program functions),
Fecundity	Randomly Distributed, Individually Determined, Influenced by Environment,
Natural Selection
Determinant	Single-locus, Multi-locus, Fitness of Offspring, Phenotypic Trait, Environmental Factors,
Models	Directional Selection, Multi-locus models, Epistasis, Random Fitness Effects, Disruptive, Phenotype Threshold, Frequency-Dependent, Other (Program is highly flexible. fitness can be defined as any function of genotypes, age, sex, population status),
Recombination
Mutation Models	k-Allele Model (In version 10), Infinite-allele Model (In version 10),
Events Allowed	Varying Demographic Features, Population Events, Varying Genetic Features, Change of Mating Systems,
Other
Interface	Command-line, Graphical User Interface,
Development
Tested Platforms	Windows,
Language	C or C++,
License
GSR Certification

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