Podocnemis expansa: Population traits

at T = 27 °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: 2025/05/22
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.549125 0.549125 0.604301 0.604301 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00175266 0.00175266 0.000286922 0.000286922 spec pop growth rate
t2 d NaN NaN NaN NaN 395.482 395.482 2415.8 2415.8 population doubling time
a_b d 96.6723 97.6308 95.4503 96.3658 89.9569 90.6507 89.9569 90.6507 age at birth
t_p d 8983.46 NaN 4209.97 6099.22 1864.52 2003.92 1864.52 2003.92 time since birth at puberty
S_b - 0.999998 0.999998 0.999998 0.999998 0.999998 0.999998 0.999998 0.999998 survival probability at birth
S_p - 0.999989 0.999988 0.463362 0.475701 0.999992 0.999991 0.391006 0.399938 survival probability at puberty
theta_0b - 0.00869929 0.00902218 0.216949 0.206225 0.145863 0.146905 0.375251 0.366682 frac of ind that is embryo
theta_bp - 0.0087037 0.00902689 0.147159 0.141733 0.124634 0.125372 0.228404 0.225653 fraction of individuals that is juvenile
theta_pi - 0.982597 0.981951 0.635892 0.652042 0.729503 0.727723 0.396345 0.407665 frac of ind that is adult
L_bi cm 16.0602 14.9685 11.0179 10.6038 9.23235 8.91565 7.84642 7.76476 mean structural length of post-natals
L2_bi cm^2 270.193 234.424 169.886 153.423 115.565 106.703 114.43 108.887 mean squared structural length of post-natals
L3_bi cm^3 4643.38 3749.38 2984.31 2512.27 1785.74 1567.73 2437.9 2190.32 mean cubed structural length of post-natals
Ww_bi g 8803.86 6875.01 5926.96 4817.05 4699.54 3947.75 6415.82 5515.49 mean wet weight of post-natals
L_pi cm 16.1776 15.0805 12.9264 12.3104 10.3006 9.94196 10.7041 10.4732 mean structural length of adults
L2_pi cm^2 272.516 236.507 207.401 185.106 133.766 123.552 175.478 164.514 mean squared structural length of adults
L3_pi cm^3 4684.3 3783.64 3669.84 3053.67 2086.07 1833.13 3828.15 3388.9 mean cubed structural length of adults
Ww_pi g 8881.46 6937.83 7288.43 5855.12 5489.91 4616.06 10074.5 8533.67 mean wet weight of adults
R 1/d 0 0 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 28.2142 22.7753 19.5224 16.4035 21.9761 18.8784 21.7601 19.2649 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 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 0 0 0 0.142419 0.145547 0.0321455 0.0326215 yield of living structure on food
Y_VX_d mol/mol 0.0189149 0.0193899 0.0430546 0.0439667 0.000212851 0.000233707 0.0660695 0.0671354 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.232384 0.220959 0.0524517 0.0495236 yield of living reserve on food
Y_EX_d mol/mol 0.0169479 0.0161642 0.0424534 0.0403353 0.000347309 0.000354797 0.107805 0.10192 yield of dead reserve on food
Y_CX mol/mol 0.694494 0.694745 0.654158 0.655137 0.41865 0.425368 0.513624 0.519532 yield of CO2 on food
Y_HX mol/mol 0.73842 0.738686 0.695532 0.696573 0.445129 0.452271 0.54611 0.552392 yield of H2O on food
Y_OX mol/mol -0.881473 -0.881792 -0.830277 -0.831521 -0.531363 -0.53989 -0.651908 -0.659407 yield of O2 on food
Y_NX mol/mol 0.160268 0.160326 0.150959 0.151186 0.0966115 0.0981618 0.118529 0.119892 yield of N-waste on food
mu_TX J/mol 445900 446091 420257 420954 268467 273096 329467 333477 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