13.5. Questions and Tasks
303
model parameters. A max uncertainty of one will result
in no flux}
minimum_size = env_variability*min_size {minimum size,
in grams, for the gill net and line fishery}
min_size = 1500 {minimum size of fishable fish in
grams}
Min_uncertainty
1 { a number between zero and one
which denotes the lowest level of random flux in the
model }
Total_fishing_intensity =
Gill_net_management_regime*env_variability {total mass
of fish removed per day}
Total_seining_intensity =
(Seine_management_regime*env_variability) {total mass
of fish seined per day}
Mass Balance
Respired(t) = Respired(t-dt) + (respiring) * dt
INIT Respired = 0
INFLOWS :
resplrlng = ARRAYSUM(Respiration[*])
can [Cohorts] =
(susceptible_joules[Cohorts] /(total_joules_available+su
sceptible_joules[Cohorts]))*Consumption_other[Cohorts]
cann[Cohorts] =
susceptible_joules[Cohorts] /(hap_standing_stock+other_s
tanding_stock+susceptible_joules[Cohorts))
Consumption (Cohorts] =
(Consumption_hap(Cohorts]*haps[Cohorts])+(Consumption_o
ther[Cohorts]*summary[Cohorts]) {total consumption in
joules}
Consumption_hap [Cohorts] = IF(Fishwt[Cohorts] = 0) THEN
o ELSE((621 .728 * (Fishwt[Cohorts] A.339))*NP_mass[Cohorts]) {consumption in joules per
day}
Consumption_other [Cohorts] = IF(Fishwt[Cohorts] = 0)
THEN 0 ELSE((525 .644 * (Fishwt[Cohorts] A. 29 ) ) *NP_ma s s [Cohor t s ] ) {consumption in joules per day}
Egestion[Cohorts] =
(haps[Cohorts]*Egestion_hap[Cohorts])+(Egestion_other[C
ohorts]*summary[Cohorts]) {total egestion in joules}