Heterodon platirhinos: 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 - 0.613564 NaN 0.703371 0.703371 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00241239 0.00241239 0.000433466 0.000433466 spec pop growth rate
t2 d NaN NaN NaN NaN 287.328 287.328 1599.08 1599.08 population doubling time
a_b d 54.3911 NaN 53.1347 NaN 50.1133 48.6012 50.1133 48.6012 age at birth
t_p d 3077.01 NaN 1469.36 NaN 730.621 568.148 730.621 568.148 time since birth at puberty
S_b - 0.999995 NaN 0.999995 NaN 0.999996 0.999997 0.999996 0.999997 survival probability at birth
S_p - 0.999969 NaN 0.665679 NaN 0.999977 0.999983 0.58894 0.549783 survival probability at puberty
theta_0b - 0.0105121 NaN 0.104982 NaN 0.113973 0.110702 0.216258 0.243571 frac of ind that is embryo
theta_bp - 0.0105251 NaN 0.0855549 NaN 0.101072 0.0985208 0.162268 0.176679 fraction of individuals that is juvenile
theta_pi - 0.978963 NaN 0.809463 NaN 0.784956 0.790777 0.621474 0.57975 frac of ind that is adult
L_bi cm 4.06301 NaN 3.65282 NaN 3.20324 3.62244 3.30775 3.54222 mean structural length of post-natals
L2_bi cm^2 17.1239 NaN 15.5736 NaN 12.3686 16.2701 14.9128 18.3067 mean squared structural length of post-natals
L3_bi cm^3 73.6638 NaN 71.9848 NaN 54.9453 85.3014 81.8708 119.416 mean cubed structural length of post-natals
Ww_bi g 94.8023 NaN 95.665 NaN 80.6428 133.663 120.161 187.119 mean wet weight of post-natals
L_pi cm 4.09288 NaN 3.90229 NaN 3.44253 3.90282 3.82357 4.20878 mean structural length of adults
L2_pi cm^2 17.2903 NaN 17.0424 NaN 13.727 18.0609 18.3404 23.322 mean squared structural length of adults
L3_pi cm^3 74.4328 NaN 79.3626 NaN 61.7015 95.6 102.619 155.033 mean cubed structural length of adults
Ww_pi g 95.792 NaN 105.47 NaN 90.5588 149.8 150.613 242.929 mean wet weight of adults
R 1/d 0 NaN 0 NaN 0.000132029 0.010421 0.00780841 0.0207638 mean reproduction rate of adults
J_X g/d 0.62094 NaN 0.647379 NaN 0.730984 1.16563 0.881341 1.31153 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 0.181331 0.176541 0.0402661 0.0394674 yield of living structure on food
Y_VX_d mol/mol 0.0294011 NaN 0.0616809 NaN 0.000968803 0.000780604 0.0850106 0.0837725 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.0848069 0.100089 0.0188321 0.022376 yield of living reserve on food
Y_EX_d mol/mol 0.00843692 NaN 0.0202906 NaN 0.000453102 0.000442562 0.0397588 0.0474947 yield of dead reserve on food
Y_CX mol/mol 0.692889 NaN 0.657031 NaN 0.506241 0.497877 0.57424 0.566731 yield of CO2 on food
Y_HX mol/mol 0.736713 NaN 0.698587 NaN 0.53826 0.529367 0.61056 0.602575 yield of H2O on food
Y_OX mol/mol -0.879437 NaN -0.833924 NaN -0.642536 -0.631921 -0.728844 -0.719312 yield of O2 on food
Y_NX mol/mol 0.159898 NaN 0.151623 NaN 0.116825 0.114895 0.132517 0.130784 yield of N-waste on food
mu_TX J/mol 445356 NaN 423101 NaN 328756 322940 371170 366069 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