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Table 1 Symbols and definitions in the model with values of parameters.

From: A genetically explicit model of speciation by sensory drive within a continuous population in aquatic environments

Sympol Definition Value
x, y xy coordinates location within the habitat x = 1000–5000, y = 1000
I(λ) The ambient illumination spectrum -
Sm(λ) The reflectance spectrum of the male nuptial color -
Se(λ) The predominant ambient light spectrum -
Ri(λ) The absorption properties of the photoreceptor i -
P(S) The total sensitivity for an object with reflectance spectrum (S) -
qi The quantum catch of photoreceptor i adapted to its background -
kR The relative contributions to overall sensitivity by LWS cone opsin -
kG The relative contributions to overall sensitivity by MWS cone opsin -
kB The relative contributions to overall sensitivity by SWS cone opsin -
λR1, λR2 The peak absorption wavelengths of allele 1 and 2 of LWS opsin gene -
λG1, λG2 The peak absorption wavelengths of allele 1 and 2 of MWS opsin gene -
λB1, λB2 The peak absorption wavelengths of allele 1 and 2 of SWS opsin gene -
Ec The mean (peak) of the distribution of I(λ) -
σE The width (standard deviation) of the distribution of I(λ) 6–16
σm The width (standard deviation) of the reflectance spectrum of male coloration 6–16
GE The steepness of the gradient in predominant light color (peak wavelength) 0–0.225
Gs The steepness with which the width of I(λ) decreases with depth 0.025
GI The steepness with which light intensity decreases with depth 0.0075
EI Light intensity -
r Reproductive rate of an individual 1.6
N The number of individuals within home range (radius of home range = 50) -
Emax Maximum perception above which perception intensity cannot increase 22
K Carrying capacity within the home range of an individual 5–15
V Strength of selectioin 100
F(S) The strength of female preference for males with reflectance spectrum Sm -
M A female's mating area 75–300
μ Mutation rates per generation 10-5,10-3,10-4, 10-6, 10-7, 10-8
d The standard deviation of a normal distribution in which random dispersal distances were generated. 50–225
α The strength of female preference relative to perception intensity 1–14
f The cost of mate preference: the strength of female preference for the preferred male is reduced by f -
c The coefficient of the cost for mating preference 0–0.00005