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12. Kelp, Urchins, and Otters in the California Coastal Region
INFLOWS:
Male_Born = 0.6*Otters_Born {otters}
OUTFLOWS :
To_2yrs = CONVEYOR OUTFLOW
Death_Young = LEAKAGE OUTFLOW
LEAKAGE FRACTION = 0 .01 {otter /month}
NO-LEAK ZONE = 0
Male_15(t) = Male_15 (t -dt) + (To_2yrs + InMale15To_5yr-Death_Juvenile) * dt
INIT Male_15 = 0 {otters}
TRANSIT TIME = 48
INFLOW LIMIT = =
CAPACITY = =
INFLOWS:
To_2yrs = CONVEYOR OUTFLOW
InMale15 = PULSE(5/5/2000) {Initial otter population}
OUTFLOWS:
To_5yr = CONVEYOR OUTFLOW
Death_Juvenile = LEAKAGE OUTFLOW
LEAKAGE FRACTION = 0 .1 {otter /month}
NO-LEAK ZONE = 0
Male_517(t) = Male_517 (t-dt) + (To_5yr + InMale517Die_Old_2) * dt
INIT Male_51? = 0 {otters}
TRANSIT TIME = 144
INFLOW LIMIT = =
CAPACITY = =
INFLOWS:
To_5yr = CONVEYOR OUTFLOW
InMale517
OUTFLOWS :
Die_Old_2
PULSE(5 ,5 ,2000) {Initial otter population}
CONVEYOR OUTFLOW
Otters_Born(t) = Otters_Born(t-dt) + (Births-Male_BornFemale_Born) * dt
INIT Otters_Born = 0 {otters}
INFLOWS:
Births = Birth_Rate*Repro_Otters*((CarrYing_CapTotal_Otters) /Carrying_Cap) {Otters per otter /month}
OUTFLOWS :
Male_Born
0 .6*Otters_Born {otters}