A model of carp life history has been developed to examine, in particular, the recruitment dynamics of carp under different flow regimes.  The underlying construct is a 30 age class model with estimates for survival and fecundity for each age class.  A number of different spawning habitat types were identified and these habitat types were specified within the model framework.  Spawning, larvae and young of the year output from each habitat defined under different flow regimes provided the expected dynamics of carp recruitment.  Regional differences have allowed the model to target specific wetlands/reaches in the Murray River.  Given a suite of different flow regimes expected, carp dynamics are produced to provide insights to managers on how best to manage flow to minimise carp recruitment.