EARLY_JUV_GROW ¼ EARLY_JUV * EARLY_JUV_GROWTH {Individuals
per Week}
EARLY_JUV_DIE ¼ IF EARLY_JUV < 1 THEN 0 ELSE (EARLY_JUV *
SIZE_RATE_2)+WINTERKILL_2 {Individuals per Week}
JUV_PRED(t) ¼ JUV_PRED(t À dt) + (JUV_GROW À SMALL_PRED_DEATH
À JUV_MAT) * dt
INIT JUV_PRED ¼ 1000 {Individuals}
INFLOWS:
JUV_GROW ¼ PULSE(PREDATOR * 25000,8,52)+BIOMANIPULATION {Individuals per Week}
OUTFLOWS:
SMALL_PRED_DEATH ¼ (SMALL_PRED_DIE * REGULATION_STRENGTH)
* JUV_PRED {Individuals per Week}
JUV_MAT ¼ PULSE(JUV_PRED,8,52) {Individuals per Week}
LARGE_ADULT(t) ¼ LARGE_ADULT(t À dt) + (ADULT_GROW À LARGE_
ADULT_DIE) * dt
INIT LARGE_ADULT ¼ 40 {Individuals}
INFLOWS:
ADULT_GROW ¼ ADULT * ADULT_GROWTH {Individuals per Week}
OUTFLOWS:
LARGE_ADULT_DIE ¼ IF LARGE_ADULT <1 THEN 0 ELSE (.001 *
(LARGE_ADULT))+WINTERKILL_6 {Individuals per Week}
LARVAL(t) ¼ LARVAL(t À dt) + (EGG_DEPOSITION À LARVAE_GROW À
LARVAL_DIE) * dt
INIT LARVAL ¼ 100 {Individuals}
INFLOWS:
EGG_DEPOSITION ¼ (PULSE(REPROD * 20000 * EGG_SURVIVAL,10,52))
+(PULSE(REPROD * 160000 * EGG_SURVIVAL,12,52))+(PULSE
(REPROD * 2000 * EGG_SURVIVAL,16,52)) {Individuals per Week}
OUTFLOWS:
LARVAE_GROW ¼ LARVAL * LARVAL_GROWTH {Individuals per Week}
LARVAL_DIE ¼ IF LARVAL <1 THEN 0 ELSE (LARVAL * SIZE_RATE)
+WINTERKILL {Individuals per Week}
LATE_JUV(t) ¼ LATE_JUV(t À dt) + (EARLY_JUV_GROW À LATE_JUV_GROW
À LATE_JUV_DIE) * dt
INIT LATE_JUV ¼ 75 {Individuals}
INFLOWS:
EARLY_JUV_GROW ¼ EARLY_JUV * EARLY_JUV_GROWTH {Individuals
per Week}
OUTFLOWS:
LATE_JUV_GROW ¼ PULSE(LATE_JUV,9,52) {Individuals per Week}
LATE_JUV_DIE ¼ IF LATE_JUV <1 THEN 0 ELSE ((LATE_JUV * SIZE_RATE_3)
* SEASONAL_SHIFT)+WINTERKILL_3 {Individuals per Week}
PREDATOR(t) ¼ PREDATOR(t À dt) + (GR À PRED_DEATH_RATE) * dt
INIT PREDATOR ¼ 10 {Individuals}
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37 Recruitment and Trophic Dynamics of Gizzard Shad