Chelydra serpentina: 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: 2025/02/13
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.619801 0.619801 0.723808 0.723808 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000564215 0.000564215 9.74566e-05 9.74566e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 1228.52 1228.52 7112.37 7112.37 population doubling time
a_b d 97.0921 97.0921 94.5869 94.5869 89.5595 89.5595 89.5595 89.5595 age at birth
t_p d 25840.6 18420.7 12547.7 11111.1 6697.35 6204.23 6697.35 6204.23 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 - 0.999988 0.999988 0.751815 0.751815 0.99999 0.99999 0.695381 0.695381 survival probability at puberty
theta_0b - 0.00447543 0.00447543 0.0988994 0.0988994 0.0493047 0.0493047 0.162678 0.162678 frac of ind that is embryo
theta_bp - 0.00448668 0.00448668 0.0859107 0.0859107 0.0469608 0.0469608 0.134697 0.134697 fraction of individuals that is juvenile
theta_pi - 0.991038 0.991038 0.81519 0.81519 0.903735 0.903735 0.702625 0.702625 frac of ind that is adult
L_bi cm 12.0947 12.0947 7.66241 7.66241 7.45338 7.45338 6.14333 6.14333 mean structural length of post-natals
L2_bi cm^2 157.701 157.701 88.7102 88.7102 74.202 74.202 66.3615 66.3615 mean squared structural length of post-natals
L3_bi cm^3 2132.74 2132.74 1244.3 1244.3 900.264 900.264 1022.31 1022.31 mean cubed structural length of post-natals
Ww_bi g 2407.54 2407.54 1431.53 1431.53 1087.42 1087.42 1234.83 1234.83 mean wet weight of post-natals
L_pi cm 12.1404 12.1404 8.25787 8.25787 7.73353 7.73353 6.92767 6.92767 mean structural length of adults
L2_pi cm^2 158.397 158.397 97.6317 97.6317 77.8362 77.8362 78.2739 78.2739 mean squared structural length of adults
L3_pi cm^3 2142.36 2142.36 1374.57 1374.57 946.585 946.585 1216.62 1216.62 mean cubed structural length of adults
Ww_pi g 2418.4 2418.4 1581.4 1581.4 1143.37 1143.37 1469.54 1469.54 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 2.6082 2.6082 1.71337 1.71337 1.98002 1.98002 1.7708 1.7708 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 0.256534 0.256534 0.0562631 0.0562631 yield of living structure on food
Y_VX_d mol/mol 0.0556831 0.0556831 0.112722 0.112722 0.0021956 0.0021956 0.139658 0.139658 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.0533297 0.0533297 0.0116963 0.0116963 yield of living reserve on food
Y_EX_d mol/mol 0.00717463 0.00717463 0.0169611 0.0169611 0.000456434 0.000456434 0.0290329 0.0290329 yield of dead reserve on food
Y_CX mol/mol 0.672561 0.672561 0.618266 0.618266 0.469714 0.469714 0.531354 0.531354 yield of CO2 on food
Y_HX mol/mol 0.715099 0.715099 0.65737 0.65737 0.499422 0.499422 0.564961 0.564961 yield of H2O on food
Y_OX mol/mol -0.853635 -0.853635 -0.784722 -0.784722 -0.596175 -0.596175 -0.674411 -0.674411 yield of O2 on food
Y_NX mol/mol 0.155206 0.155206 0.142677 0.142677 0.108395 0.108395 0.12262 0.12262 yield of N-waste on food
mu_TX J/mol 433138 433138 399848 399848 308263 308263 346154 346154 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