<?xml version="1.0" encoding="UTF-8"?>
<sbml xmlns="http://www.sbml.org/sbml/level2" level="2" version="1">
  <model id="LotkaVolterra">
    <listOfUnitDefinitions>
      <unitDefinition id="substance">
        <listOfUnits>
          <unit kind="item" multiplier="1" offset="0"/>
        </listOfUnits>
      </unitDefinition>
    </listOfUnitDefinitions>
    <listOfCompartments>
      <compartment id="Cell"/>
    </listOfCompartments>
    <listOfSpecies>
      <species id="Prey" compartment="Cell" initialAmount="50" hasOnlySubstanceUnits="true"/>
      <species id="Predator" compartment="Cell" initialAmount="100" hasOnlySubstanceUnits="true"/>
    </listOfSpecies>
    <listOfReactions>
      <reaction id="PreyReproduction" reversible="false">
        <listOfReactants>
          <speciesReference species="Prey"/>
        </listOfReactants>
        <listOfProducts>
          <speciesReference species="Prey" stoichiometry="2"/>
        </listOfProducts>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> c1 </ci>
              <ci> Prey </ci>
            </apply>
          </math>
          <listOfParameters>
            <parameter id="c1" value="1"/>
          </listOfParameters>
        </kineticLaw>
      </reaction>
      <reaction id="PredatorPreyInteraction" reversible="false">
        <listOfReactants>
          <speciesReference species="Prey"/>
          <speciesReference species="Predator"/>
        </listOfReactants>
        <listOfProducts>
          <speciesReference species="Predator" stoichiometry="2"/>
        </listOfProducts>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> c2 </ci>
              <ci> Prey </ci>
              <ci> Predator </ci>
            </apply>
          </math>
          <listOfParameters>
            <parameter id="c2" value="0.005"/>
          </listOfParameters>
        </kineticLaw>
      </reaction>
      <reaction id="PredatorDeath" reversible="false">
        <listOfReactants>
          <speciesReference species="Predator"/>
        </listOfReactants>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <times/>
              <ci> c3 </ci>
              <ci> Predator </ci>
            </apply>
          </math>
          <listOfParameters>
            <parameter id="c3" value="0.6"/>
          </listOfParameters>
        </kineticLaw>
      </reaction>
    </listOfReactions>
  </model>
</sbml>

