Staying_at_3 ¼ (Juveniles_Pond_3/7) * 0.96
Juveniles_3_Dying ¼ Juveniles_Pond_3 * Juvenile_Death_Rate
Larvae_Pond_1(t) ¼ Larvae_Pond_1(t À dt) + (Reproducing_1 À Growing_1 À
Larvae_1_Dying) * dt
INIT Larvae_Pond_1 ¼ 0
INFLOWS:
Reproducing_1 ¼ (.5 * Adults_Pond_1 * Number_of_Eggs * Hatching_Success) *
(1À(Adults_Pond_1/Carrying_Capacity_1))
OUTFLOWS:
Growing_1 ¼ DELAY(Larvae_Pond_1,0.25)
Larvae_1_Dying ¼ Larvae_Pond_1 * Larvae_Death_Rate
Larvae_Pond_2(t) ¼ Larvae_Pond_2(t À dt) + (Reproducing_2 À Growing_2 À
Larvae_2_Dying) * dt
INIT Larvae_Pond_2 ¼ 0
INFLOWS:
Reproducing_2 ¼ (.5 * Adults_Pond_2 * Number_of_Eggs * Hatching_Success) *
(1À(Adults_Pond_2/Carrying_Capacity_2))
OUTFLOWS:
Growing_2 ¼ DELAY(Larvae_Pond_2,0.25)
Larvae_2_Dying ¼ Larvae_Pond_2 * Larvae_Death_Rate
Larvae_Pond_3(t) ¼ Larvae_Pond_3(t À dt) + (Reproducing_3 À Growing_3 À
Larvae_3_Dying) * dt
INIT Larvae_Pond_3 ¼ 0
INFLOWS:
Reproducing_3 ¼ (.5 * Adults_Pond_3 * Number_of_Eggs * Hatching_Success) *
(1À(Adults_Pond_3/Carrying_Capacity_3))
OUTFLOWS:
Growing_3 ¼ DELAY(Larvae_Pond_3,0.25)
Larvae_3_Dying ¼ Larvae_Pond_3 * Larvae_Death_Rate
Adult_Death_Rate ¼ .17 {IF TIME >¼ 10 and TIME <¼ 15 THEN 1 ELSE 0.17}
Carrying_Capacity_1 ¼ 274 {IF TIME >¼ 10 and TIME <¼ 15 THEN 1 ELSE
274}
Carrying_Capacity_2 ¼ 180 * 0+274
Carrying_Capacity_3 ¼ 274
Dispersal_Through_Forest ¼ 0.333
Dispersal_Through_Grass ¼ 0.167
Hatching_Success ¼ 0.27
Juvenile_Death_Rate ¼ .43 {IF TIME >¼ 10 and TIME <¼ 15 THEN 1 ELSE
0.43}
Larvae_Death_Rate ¼ .5 {IF TIME >¼ 10 and TIME <¼ 15 THEN 1 ELSE 0.5}
Number_of_Eggs ¼ 125
Observerd_Pop ¼ GRAPH(TIME)
(0.00, 236), (1.00, 236), (2.00, 240), (3.00, 260)
38.2 Salamander Dispersal Model Equations
355