Thamnophis sirtalis: Population traits

at T = 26 °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 - 0.546755 NaN 0.636634 0.636634 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.0025454 0.0025454 0.000337448 0.000337448 spec pop growth rate
t2 d NaN NaN NaN NaN 272.314 272.314 2054.09 2054.09 population doubling time
a_b d 91.4469 NaN 90.3242 NaN 87.6733 88.8611 87.6733 88.8611 age at birth
t_p d 2377.67 NaN 1156.76 NaN 667.679 814.881 667.679 814.881 time since birth at puberty
S_b - 0.999997 NaN 0.999997 NaN 0.999997 0.999997 0.999997 0.999997 survival probability at birth
S_p - 0.999983 NaN 0.392501 NaN 0.999986 0.999982 0.339977 0.36283 survival probability at puberty
theta_0b - 0.0170005 NaN 0.203855 NaN 0.200123 0.202588 0.376501 0.342256 frac of ind that is embryo
theta_bp - 0.0170042 NaN 0.12609 NaN 0.160115 0.1616 0.211539 0.198275 fraction of individuals that is juvenile
theta_pi - 0.965995 NaN 0.670055 NaN 0.639762 0.635812 0.41196 0.459469 frac of ind that is adult
L_bi cm 3.68354 NaN 3.46078 NaN 3.09743 2.79885 3.25209 3.06347 mean structural length of post-natals
L2_bi cm^2 13.9056 NaN 13.7784 NaN 11.8417 9.35483 15.2121 12.4189 mean squared structural length of post-natals
L3_bi cm^3 53.1756 NaN 58.4667 NaN 52.4168 35.4508 86.527 58.6435 mean cubed structural length of post-natals
Ww_bi g 200.542 NaN 247.132 NaN 318.1 179.294 525.103 296.592 mean wet weight of post-natals
L_pi cm 3.72697 NaN 3.88652 NaN 3.54867 3.18856 4.28307 3.85775 mean structural length of adults
L2_pi cm^2 14.1239 NaN 16.096 NaN 14.3762 11.317 22.2088 17.1188 mean squared structural length of adults
L3_pi cm^3 54.0785 NaN 69.1269 NaN 64.9545 43.9139 129.895 83.1089 mean cubed structural length of adults
Ww_pi g 203.947 NaN 292.191 NaN 394.187 222.097 788.286 420.327 mean wet weight of adults
R 1/d 0 NaN 0.00332625 NaN 0.00284834 0 0.0171373 0.00717156 mean reproduction rate of adults
J_X g/d 1.78669 NaN 2.06137 NaN 2.7828 1.75984 3.57483 2.33626 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 0.0479452 0.0512753 0.00816774 0.00847041 yield of living structure on food
Y_VX_d mol/mol 0.00652992 NaN 0.0147908 NaN 0.000134787 0.000179372 0.019554 0.0205111 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.243018 0.208052 0.0413995 0.0343691 yield of living reserve on food
Y_EX_d mol/mol 0.0180965 NaN 0.0477283 NaN 0.000683188 0.000727811 0.0991125 0.0832248 yield of dead reserve on food
Y_CX mol/mol 0.703624 NaN 0.672836 NaN 0.486561 0.512192 0.586943 0.60454 yield of CO2 on food
Y_HX mol/mol 0.748127 NaN 0.715391 NaN 0.517334 0.544587 0.624066 0.642776 yield of H2O on food
Y_OX mol/mol -0.893061 NaN -0.853984 NaN -0.617558 -0.65009 -0.744966 -0.767301 yield of O2 on food
Y_NX mol/mol 0.162375 NaN 0.15527 NaN 0.112283 0.118198 0.135448 0.139509 yield of N-waste on food
mu_TX J/mol 451358 NaN 431277 NaN 308945 326176 374748 386525 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