Polyodon spathula: Population traits

at T = 15 °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: 2025/02/12
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.559591 0.559591 0.560687 0.560687 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00317601 0.00317601 0.000846642 0.000846642 spec pop growth rate
t2 d NaN NaN NaN NaN 218.245 218.245 818.702 818.702 population doubling time
a_b d 16.5995 16.6982 16.5958 16.6945 15.6822 15.757 15.6822 15.757 age at birth
t_p d 29142.6 NaN 16822.2 NaN 3323.28 3496.54 3323.28 3496.54 time since birth at puberty
S_b - 1 1 1 1 1 1 1 1 survival probability at birth
S_p - 1 1 0.391011 0.397595 1 1 0.33695 0.341322 survival probability at puberty
theta_0b - 0.000694663 0.00071381 0.348726 0.34239 0.0484731 0.0487016 0.433887 0.430215 frac of ind that is embryo
theta_bp - 0.00069655 0.000715325 0.218546 0.216245 0.046232 0.0464359 0.249366 0.248818 fraction of individuals that is juvenile
theta_pi - 0.998609 0.998571 0.432727 0.441366 0.905295 0.904863 0.316746 0.320967 frac of ind that is adult
L_bi cm 8.77592 8.30291 1.23634 1.22946 1.47832 1.44697 0.395358 0.394035 mean structural length of post-natals
L2_bi cm^2 81.0981 72.5584 8.11278 7.6773 3.80184 3.62894 0.605939 0.594017 mean squared structural length of post-natals
L3_bi cm^3 763.718 646.073 71.3208 63.8559 13.6376 12.6661 2.63189 2.50771 mean cubed structural length of post-natals
Ww_bi g 2638.99 2145.41 246.789 212.336 73.4787 65.1937 14.1805 12.9075 mean wet weight of post-natals
L_pi cm 8.78195 8.30877 1.79576 1.76903 1.5467 1.5141 0.601853 0.596643 mean structural length of adults
L2_pi cm^2 81.1547 72.6104 12.2016 11.4306 3.99498 3.81416 1.06869 1.04053 mean squared structural length of adults
L3_pi cm^3 764.251 646.535 107.34 95.1406 14.3339 13.3159 4.70192 4.44978 mean cubed structural length of adults
Ww_pi g 2640.83 2146.94 371.424 316.365 77.2304 68.5386 25.3336 22.9035 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 5.68795 4.8097 0.570117 0.509904 0.476506 0.429872 0.0759457 0.0703653 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 0.0908975 0.0935803 0.0293403 0.030173 yield of living structure on food
Y_VX_d mol/mol 0.00698043 0.00711626 0.0174598 0.0178229 3.50674e-06 3.81987e-06 0.0573388 0.0589281 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.398853 0.388088 0.128743 0.125131 yield of living reserve on food
Y_EX_d mol/mol 0.0171401 0.0165146 0.0429557 0.0414424 1.53874e-05 1.58414e-05 0.251599 0.244382 yield of dead reserve on food
Y_CX mol/mol 0.866504 0.866994 0.830209 0.83136 0.400856 0.408937 0.423603 0.432011 yield of CO2 on food
Y_HX mol/mol 0.623402 0.623754 0.59729 0.598117 0.288393 0.294207 0.304759 0.310808 yield of H2O on food
Y_OX mol/mol -0.942324 -0.942856 -0.902853 -0.904104 -0.435931 -0.444719 -0.460668 -0.469812 yield of O2 on food
Y_NX mol/mol 0.129976 0.130049 0.124531 0.124704 0.0601284 0.0613406 0.0635405 0.0648017 yield of N-waste on food
mu_TX J/mol 459583 459859 440144 440795 207672 212251 219972 224717 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