Equus quagga: Population traits

at T = 38.3 °C with background hazards for embryo, baby, juv, adult: 0, 0, 0, 0 1/d

Ln survival probability as function of age, with (dashed) and without (solid) thinning at max (red) and min (blue) scaled functional response for females.
Ln survivor function of the stable age distribution as function of age, with (dashed) and without (solid) thinning at max (red) and min (blue) scaled functional response for females.
model stx f_minf f_max date: 2022/12/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.825267 0.836856 0.918428 0.918428 1 1 scaled functional response
r 1/d 0 0 0.000448284 0.000195411 0.000676066 0.000297343 spec pop growth rate
t2 d NaN NaN 1546.22 3547.12 1025.27 2331.14 population doubling time
a_b d 324.599 324.599 324.599 324.599 324.599 324.599 age at birth
t_x d 2907.36 2211.49 1183.74 1183.74 902.398 902.398 time since birth at weaning
t_p d 591.703 569.208 459.184 459.184 394.955 394.955 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_x - 0.999999 0.648582 0.999999 0.606977 0.999999 0.572987 survival probability at weaning
S_p - 0.999674 0.368226 0.999979 0.364956 0.99999 0.362261 survival probability at puberty
theta_0b - 0.0166707 0.0445427 0.135739 0.162133 0.197163 0.233322 frac of ind that is embryo
theta_bx - 0.016666 0.0353046 0.117326 0.116845 0.158275 0.158227 fraction of individuals that is baby
theta_xp - 0.132596 0.11363 0.23943 0.162746 0.208569 0.147473 fraction of individuals that is juvenile
theta_pi - 0.834067 0.806522 0.507505 0.558276 0.435993 0.460978 frac of ind that is adult
L_bi cm 29.5698 29.6666 29.3791 29.9853 29.7124 30.4863 mean structural length of post-natals
L2_bi cm^2 876.895 885.161 882.44 920.502 912.927 965.708 mean squared structural length of post-natals
L3_bi cm^3 26060.6 26521.3 26976.6 28766 28830.6 31512.7 mean cubed structural length of post-natals
Ww_bi g 127632 131340 143988 153539 164990 180339 mean wet weight of post-natals
L_pi cm 30.0173 30.4207 32.5034 32.8771 34.0791 34.8992 mean structural length of adults
L2_pi cm^2 901.041 925.429 1057.46 1081.64 1164.98 1221.24 mean squared structural length of adults
L3_pi cm^3 27046.9 28152.7 34434.2 35609 39942.7 42842.7 mean cubed structural length of adults
Ww_pi g 132463 139420 183793 190063 228582 245178 mean wet weight of adults
R 1/d 6.13881e-05 0.000169726 0.00076523 0.00086606 0.00124554 0.0014846 mean reproduction rate of adults
J_X g/d 748.565 766.233 838.336 874.496 944.33 998.927 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.109375 0.109375 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 0 0.0144252 0.00642793 0.0206405 0.00938016 yield of living structure on food
Y_VX_d mol/mol 0.00188845 0.00338465 4.85707e-05 0.00608334 1.77628e-05 0.00873882 yield of dead structure on food
Y_EX mol/mol 0 0 0.0625694 0.0278812 0.0974798 0.0443001 yield of living reserve on food
Y_EX_d mol/mol 0.00736028 0.013377 0.000210675 0.0263865 8.38894e-05 0.0412712 yield of dead reserve on food
Y_CX mol/mol 0.815273 0.808324 0.752368 0.762058 0.714473 0.727915 yield of CO2 on food
Y_HX mol/mol 0.695308 0.689381 0.641659 0.649923 0.60934 0.620804 yield of H2O on food
Y_OX mol/mol -0.958497 -0.950326 -0.884541 -0.895933 -0.839988 -0.855791 yield of O2 on food
Y_NX mol/mol 0.0661032 0.0655398 0.0610028 0.0617885 0.0579302 0.0590201 yield of N-waste on food
mu_TX J/mol 459443 455454 423292 428859 401443 409176 yield of heat on food

Remarks

  • Reprod-code O applies. Sex ratio is assumed to be 1:1. Parameters of male and female are the same.
  • Buffer handling rule: release each egg as soon as reproduction buffer allows
  • Weights of adults do not include reproduction buffer