M is the minimum viable population. Build a Stella model incorporating both minimum viable populations and hunting. So far we have not introduced any new Stella capabilities. In this section we struggle with a new and very powerful idea, the ability of Stella to incorporate time delays in its modeling. The key to this ability is the form of reservoir known as a conveyor.
Conveyors always occur in concert with an outgoing valve.
The outgoing valve cannot take a formula, it is always open to whatever level of material is leaving the conveyor. Conveyors work by accepting flows into the conveyor and then holding it there for a specified length of time. When the time is up the material is disgorged from the conveyor into its outgoing valve which carries it away from the conveyor. The time delay for a given conveyor is fixed for an entire run of the model, but different conveyors can have different delays. It is still possible to delay decreases in quantities, but it requires some obscure messing around with the model to accomplish.