Trachemys scripta: Population traits

at T = 24 °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 - 0.535442 0.535442 0.680539 0.680539 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000941055 0.000941055 8.50733e-05 8.50733e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 736.564 736.564 8147.64 8147.64 population doubling time
a_b d 127.423 132.104 122.781 127.103 116.184 119.89 116.184 119.89 age at birth
t_p d 10530.3 4440.27 3985.81 2709.79 2295.24 1655.97 2295.24 1655.97 time since birth at puberty
S_b - 0.999998 0.999998 0.999999 0.999998 0.999999 0.999998 0.999999 0.999998 survival probability at birth
S_p - 0.999991 0.999988 0.540971 0.586765 0.999994 0.999991 0.471141 0.510306 survival probability at puberty
theta_0b - 0.00726137 0.0081498 0.160223 0.131885 0.103578 0.106712 0.270609 0.236927 frac of ind that is embryo
theta_bp - 0.00726739 0.00815759 0.117585 0.100823 0.0928985 0.0953824 0.183593 0.167237 fraction of individuals that is juvenile
theta_pi - 0.985471 0.983693 0.722192 0.767293 0.803524 0.797905 0.545798 0.595836 frac of ind that is adult
L_bi cm 5.83677 4.6799 5.02639 4.36339 4.3897 3.81922 4.55141 4.2192 mean structural length of post-natals
L2_bi cm^2 35.3361 22.6439 33.1283 23.4441 25.0811 18.4017 34.3534 26.8173 mean squared structural length of post-natals
L3_bi cm^3 217.747 111.464 243.098 137.944 170.617 103.995 328.041 207.918 mean cubed structural length of post-natals
Ww_bi g 313.732 150.744 379.299 199.728 311.081 172.439 598.107 344.758 mean wet weight of post-natals
L_pi cm 5.8705 4.70848 5.63679 4.77236 4.74119 4.11834 5.63763 5.03965 mean structural length of adults
L2_pi cm^2 35.5848 22.819 38.2543 26.3178 27.7679 20.3923 45.314 33.8683 mean squared structural length of adults
L3_pi cm^3 219.337 112.373 282.331 155.808 190.049 116.146 437.58 265.648 mean cubed structural length of adults
Ww_pi g 316.024 151.973 440.513 225.593 346.511 192.587 797.827 440.481 mean wet weight of adults
R 1/d 0 0.001033 0.00131925 0.00258987 0.000418909 0.00230078 0.00624531 0.0061277 mean reproduction rate of adults
J_X g/d 0.724362 0.371077 0.863133 0.488302 0.960224 0.563196 1.31521 0.82076 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 0.167211 0.173768 0.021219 0.0215511 yield of living structure on food
Y_VX_d mol/mol 0.0210425 0.0227264 0.0484046 0.0511623 0.000360539 0.000467688 0.0611173 0.0636917 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.13766 0.114363 0.017469 0.0141837 yield of living reserve on food
Y_EX_d mol/mol 0.00927582 0.0080087 0.0271196 0.0229151 0.000296822 0.000307804 0.0503162 0.0419181 yield of dead reserve on food
Y_CX mol/mol 0.698999 0.698661 0.662269 0.663445 0.475391 0.488896 0.601659 0.60879 yield of CO2 on food
Y_HX mol/mol 0.743209 0.742849 0.704157 0.705406 0.505458 0.519818 0.639713 0.647295 yield of H2O on food
Y_OX mol/mol -0.887191 -0.886761 -0.840573 -0.842065 -0.603381 -0.620522 -0.763644 -0.772695 yield of O2 on food
Y_NX mol/mol 0.161308 0.161229 0.152831 0.153103 0.109706 0.112822 0.138844 0.14049 yield of N-waste on food
mu_TX J/mol 449005 448864 425924 426844 307484 316807 387274 392167 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