Pantherophis guttatus: Population traits

at T = 25 °C with background hazards for embryo, juv, adult: 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 std f_min f_max date: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.540449 NaN 0.563261 0.563261 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00256166 0.00256166 0.000591544 0.000591544 spec pop growth rate
t2 d NaN NaN NaN NaN 270.585 270.585 1171.76 1171.76 population doubling time
a_b d 77.4642 NaN 76.9191 NaN 70.0687 70.6344 70.0687 70.6344 age at birth
t_p d 3790.46 NaN 2225.3 NaN 600.503 642.061 600.503 642.061 time since birth at puberty
S_b - 0.999999 NaN 1 NaN 1 1 1 1 survival probability at birth
S_p - 0.999997 NaN 0.676456 NaN 0.999998 0.999998 0.542773 0.553789 survival probability at puberty
theta_0b - 0.0060957 NaN 0.0503038 NaN 0.164245 0.165452 0.266674 0.258732 frac of ind that is embryo
theta_bp - 0.00610195 NaN 0.0412779 NaN 0.13733 0.138142 0.188242 0.184419 fraction of individuals that is juvenile
theta_pi - 0.987802 NaN 0.908418 NaN 0.698425 0.696405 0.545084 0.556849 frac of ind that is adult
L_bi cm 4.87958 NaN 4.70811 NaN 4.00353 3.88477 4.16957 4.09902 mean structural length of post-natals
L2_bi cm^2 24.1229 NaN 23.3067 NaN 19.0068 17.7569 22.9891 21.8654 mean squared structural length of post-natals
L3_bi cm^3 120.145 NaN 118.394 NaN 103.37 92.5355 154.18 140.423 mean cubed structural length of post-natals
Ww_bi g 164.845 NaN 164.301 NaN 174.531 152.993 260.317 232.168 mean wet weight of post-natals
L_pi cm 4.89857 NaN 4.84009 NaN 4.41146 4.275 4.95134 4.82852 mean structural length of adults
L2_pi cm^2 24.2517 NaN 24.2174 NaN 22.0069 20.5447 29.6642 27.9072 mean squared structural length of adults
L3_pi cm^3 120.85 NaN 123.504 NaN 122.252 109.463 204.978 184.62 mean cubed structural length of adults
Ww_pi g 165.812 NaN 171.393 NaN 206.411 180.98 346.086 305.242 mean wet weight of adults
R 1/d 0 NaN 0 NaN 0.00455341 0.00281743 0.0116331 0.00935842 mean reproduction rate of adults
J_X g/d 1.08388 NaN 1.09141 NaN 1.58018 1.40109 1.91126 1.72527 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.109375 NaN 0.109375 NaN 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 NaN 0 NaN 0.167576 0.169185 0.0477195 0.0481469 yield of living structure on food
Y_VX_d mol/mol 0.00960341 NaN 0.0213229 NaN 3.89078e-05 4.14027e-05 0.0732441 0.0729189 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.11536 0.110537 0.0328501 0.0314567 yield of living reserve on food
Y_EX_d mol/mol 0.00357291 NaN 0.00826796 NaN 2.67842e-05 2.70504e-05 0.0504214 0.0476415 yield of dead reserve on food
Y_CX mol/mol 0.712927 NaN 0.69959 NaN 0.493694 0.496303 0.557692 0.561 yield of CO2 on food
Y_HX mol/mol 0.758018 NaN 0.743838 NaN 0.524919 0.527693 0.592965 0.596482 yield of H2O on food
Y_OX mol/mol -0.904869 NaN -0.887941 NaN -0.626612 -0.629923 -0.70784 -0.712038 yield of O2 on food
Y_NX mol/mol 0.164522 NaN 0.161444 NaN 0.113929 0.114531 0.128698 0.129461 yield of N-waste on food
mu_TX J/mol 457705 NaN 449413 NaN 319670 321487 359938 362145 yield of heat on food

Remarks

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