13.5. Questions and Tasks
313
hap_R = .01 {maximum rate of replenishment in joules
per day}
other_K = (4*(10
A 1 3 ) ) - h a p _ s t a n d i n g _ s t o c k
{carrying
capacity of other}
other_R = .01 {maximum rate of replenishment in joules
per day}
Sector 2
cohort_spawned = IF (day = 1) THEN 2 ELSE IF(day = 2)
THEN 3 ELSE IF(day = 3) THEN 4 ELSE IF(day = 4) THEN 5
ELSE IF(day = 5) THEN 6 ELSE IF(day = 6) THEN 7 ELSE
IF(day = 7) THEN 8 ELSE IF(day = 8) THEN 9 ELSE IF(day
= 9) THEN 10 ELSE IF(day = 10) THEN 11 ELSE IF(day =
11) THEN 12 ELSE IF(day = 12) THEN 13 ELSE IF(day = 13)
THEN 14 ELSE IF (day = 14) THEN 15 ELSE IF(day 15)
THEN 16 ELSE IF(day = 16) THEN 17 ELSE IF(day = 17)
THEN 18 ELSE IF (day = 18) THEN 19 ELSE IF(day = 19)
THEN 20 ELSE 0 {cohort which received spawned biomass}
day = (TIME+start_date) /365
larval_mortality = .99 {percentage of spawned biomass
lost}
larval_survivorship = ((1larval_mortality)*env_variability) /2 {quantity in
biomass entering the cohort as juvenile fish}
mature_size = 1500 {size of sexually mature fish
size_at_maturity = env_variability*mature_size
spawning = IF(spawn_timing = 1) THEN
(0.02*env_variabi1ity) ELSE 0 {percent biomass spawned}
spawn_timing = IF(day = 1) THEN 1 ELSE IF(day = 2) THEN
1 ELSE IF(day = 3) THEN 1 ELSE IF (day = 4) THEN 1 ELSE
IF(day = 5) THEN 1 ELSE IF(day = 6) THEN 1 ELSE IF(day
= 7) THEN 1 ELSE IF(day = 8) THEN 1 ELSE IF(day 9)
THEN 1 ELSE IF(day = 10) THEN 1 ELSE IF (day = 11) THEN
1 ELSE IF (day = 12) THEN 1 ELSE IF(day = 13) THEN 1
ELSE IF(day = 14) THEN 1 ELSE IF (day = 15) THEN 1 ELSE
IF(day = 16) THEN 1 ELSE IF(day = 17) THEN 1 ELSE
IF(day = 18) THEN 1 ELSE IF(day = 19) THEN 1 ELSE
IF(day = 20) THEN 1 ELSE 0 {controls spawning}
start_date
0 {adjust for later start date}