Skip to main content

Table 4 Description of the different parameters used in the model

From: Rift Valley fever vector diversity and impact of meteorological and environmental factors on Culex pipiens dynamics in the Okavango Delta, Botswana

Parameter

Definition

Value

Reference

β 1

Number of eggs laid by ovipositing nulliparous females (per female)

141

[37, 51, 67, 75]

β2

Number of eggs laid by ovipositing parous females (per female)

80

[37, 51, 67, 75]

k Lmin

k Lmax

Standard environment carrying capacity for larvae (larvae ha-1)

8 × 106

1 × 108

Expert opinion

k P min

k P max

Standard environment carrying capacity for pupae (pupae ha-1)

8 × 106

1 × 108

Expert opinion

σ

Sex-ratio at the emergence

0.5

[16, 36]

μ E

Egg mortality rate (day-1)

0.0262

[37, 51, 67, 75]

μ L

Minimum larva mortality rate (day-1)

0.0304

[37, 51, 67, 75]

μ P

Minimum pupa mortality rate (day-1)

0.0735

[37, 51, 67, 75, 76]

μ em

Mortality rate during adult emergence (day-1)

0.21845

[67, 77]

μ A

Minimum adult mortality rate (day-1)

0.1

[77]

μ r min

μ r max

Adult mortality rate related to seeking behaviour (day-1)

0.18

0.59

[78]

γ Ah

Transition rate from host-seeking to engorged adults (day-1)

0.885

[37, 51, 67, 75]

γ Ao

Transition rate from engorged adult to oviposition site-seeking adults (day-1)

0.25

[67]

γ Aem

Development rate of emerging adults (day-1)

0.25

[37, 51, 67, 75]

T E

Minimal temperature needed for egg development (°C)

10

[16]

TDD E

Total number of degree-day necessary for egg development (°C)

19.18

[16]

T Ag

Minimal temperature needed for development of engorged females (°C)

10

[37, 51, 67, 75]

TDD Ag

Total number of degree-days necessary for engorged females development (°C)

64.4

[37, 51, 67, 75]

  1. “Expert opinion”: estimation from others species or areas [37]