REALISTIC MODELS I N POPULATION ECOLOQY
245
280FIG. 11. The population history and the birth rate (lower line) for a feeding rate
of 100 000 cells/ml every two days.
N
'
FIG. 12. The population and the birth rate for a population in which old, stunted
animals devote some energy to reproduction.
but the important point illustrated here is that the model has identified
the factor which controls oscillation decay, viz. the energy separation
between reproduction and growth of older stunted animals.
The model developed above can be improved in various ways. For
example, the birth submodel could be bettered and temperature
dependence could be included in all submodels. The latter modification
should not be very difficult to implement.
I
245
280FIG. 11. The population history and the birth rate (lower line) for a feeding rate
of 100 000 cells/ml every two days.
N
'
FIG. 12. The population and the birth rate for a population in which old, stunted
animals devote some energy to reproduction.
but the important point illustrated here is that the model has identified
the factor which controls oscillation decay, viz. the energy separation
between reproduction and growth of older stunted animals.
The model developed above can be improved in various ways. For
example, the birth submodel could be bettered and temperature
dependence could be included in all submodels. The latter modification
should not be very difficult to implement.
I