Heterodon nasicus: 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 - 0.537204 NaN 0.770627 0.770627 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00172953 0.00172953 9.66802e-05 9.66802e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 400.772 400.772 7169.48 7169.48 population doubling time
a_b d 61.8436 NaN 58.2585 NaN 55.9368 57.9434 55.9368 57.9434 age at birth
t_p d 3351.96 NaN 1051.14 NaN 729.658 994.89 729.658 994.89 time since birth at puberty
S_b - 0.999998 NaN 0.999999 NaN 0.999999 0.999998 0.999999 0.999998 survival probability at birth
S_p - 0.99999 NaN 0.572741 NaN 0.999993 0.99999 0.521393 0.565794 survival probability at puberty
theta_0b - 0.00744455 NaN 0.139753 NaN 0.0922383 0.0954027 0.208743 0.175838 frac of ind that is embryo
theta_bp - 0.00745246 NaN 0.105563 NaN 0.0837841 0.0863671 0.149638 0.131302 fraction of individuals that is juvenile
theta_pi - 0.985103 NaN 0.754684 NaN 0.823978 0.81823 0.64162 0.69286 frac of ind that is adult
L_bi cm 4.83981 NaN 4.90341 NaN 4.16918 3.58405 4.86583 4.36317 mean structural length of post-natals
L2_bi cm^2 24.172 NaN 30.4241 NaN 21.8241 15.6316 34.5276 25.5544 mean squared structural length of post-natals
L3_bi cm^3 122.696 NaN 208.015 NaN 132.86 78.1358 288.49 171.624 mean cubed structural length of post-natals
Ww_bi g 162.584 NaN 305.024 NaN 213.262 115.831 463.073 254.422 mean wet weight of post-natals
L_pi cm 4.86677 NaN 5.40656 NaN 4.45514 3.82251 5.68894 4.94175 mean structural length of adults
L2_pi cm^2 24.3425 NaN 34.4394 NaN 23.8544 17.095 42.1598 30.0696 mean squared structural length of adults
L3_pi cm^3 123.609 NaN 236.794 NaN 146.109 86.1329 355.2 203.714 mean cubed structural length of adults
Ww_pi g 163.793 NaN 347.224 NaN 234.529 127.686 570.153 301.992 mean wet weight of adults
R 1/d 0 NaN 0.00498871 NaN 0.0026352 0 0.0102583 0.00375725 mean reproduction rate of adults
J_X g/d 0.820112 NaN 1.48075 NaN 1.37834 0.787026 2.18066 1.28662 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 0.166711 0.171708 0.0127903 0.0128963 yield of living structure on food
Y_VX_d mol/mol 0.0218277 NaN 0.0499173 NaN 0.00050755 0.000653672 0.0564695 0.0590603 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.100887 0.0828373 0.00774022 0.0062216 yield of living reserve on food
Y_EX_d mol/mol 0.0070961 NaN 0.0232792 NaN 0.00030715 0.000315353 0.0341732 0.0284926 yield of dead reserve on food
Y_CX mol/mol 0.700132 NaN 0.664161 NaN 0.505547 0.516028 0.633305 0.636963 yield of CO2 on food
Y_HX mol/mol 0.744414 NaN 0.706167 NaN 0.537522 0.548665 0.67336 0.677249 yield of H2O on food
Y_OX mol/mol -0.888629 NaN -0.842973 NaN -0.641656 -0.654958 -0.80381 -0.808453 yield of O2 on food
Y_NX mol/mol 0.161569 NaN 0.153268 NaN 0.116665 0.119083 0.146147 0.146991 yield of N-waste on food
mu_TX J/mol 449799 NaN 427258 NaN 327540 334774 407686 410256 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