Database Reference
In-Depth Information
TRANSMISSION
EFFICACY
M TO B
BIRD
DEATH
RATE
MOSQ
BREEDING
SEASON
BIRD
DEATH
RATE
TOTAL BIRD
POPULATION
BIRD
BIRTH
RATE
+
BIRD
BREEDING
SEASON
BIRD
DEATH
RATE
~
BI DYING
BR DYING
BS DYING
BITE
RATE
Bird
I to R
~
BIRD
INFECT
BIRD
RECOV
BIRD
SUSC
BIRD
INFECTING
BIRD
BIRTHING
TOTAL BIRD
POPULATION
+
BIRD
RECOVERY
RATE
+
TOTAL BIRD
POPULATION
BIRD %
INFECTED
+
BI DYING WNV
WNV
DEATH
RATE
MOSQ
INFECT
BIRD %
RECOVERED
+
WNV
DEAD
SEROPREVALENCE
+
IMMUNITY
LOSING
IMMUNITY
LOSS RATE
Fig. 12.8
MOSQ
BREEDING
SEASON
TRANSMISSION
EFFICACY
B TO M
~
TOTAL
ADULT
MOSQ
MATURATION
RATE
+
TRANSITION
RATE
TOTAL
ADULT
MOSQ
BITE
RATE
MOSQ
BREEDING
SEASON
+
~
MOSQ
INFECT
MOSQ
EXPOS
MOSQ
SUSCEP
MOSQ
LARVA
MOSQ
BREEDING
SEASON
INCUBATION
MOSQ %
INFECTED
MOSQ
INFECTING
MOSQ
DEVELOPING
MOSQ
BIRTHING
+
~
OVIPOSITION
RATE
MI DYING
ME DYING
MS DYING
LARVAL DYING
MOSQ
DEATH
RATE
MOSQ
DEATH
RATE
LARVAL
DEATH
RATE
BIRD
INFECT
MOSQ
DEATH
RATE
Fig. 12.9
Seasonal dynamics are imposed on the system using a simple graphical function
for BIRD BREEDING SEASON, which modifies the rate of BIRD BIRTHING as a
proportion of the maximum birth rate (0.025 offspring per day per individual) rang-
ing from 0 to 1. MOSQUITO BREEDING SEASON is set similarly as a proportion
changing over time to influence the rates of MOSQUITO BIRTHING, MOSQUITO
EXPOSING, and BIRD INFECTING. These graphical functions allow for affected
flows to operate between April and September for birds and between May and
September for mosquitoes, a season typical of the central Midwestern United States.
