Ondatra zibethicus: Population traits

at T = 37.4 °C with background hazards for embryo, baby, juv, adult: 0, 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 stx f_minf f_max date: 2022/12/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.940801 0.944829 0.972414 0.972414 1 1 scaled functional response
r 1/d 0 0 0.00479785 0.00119729 0.00674609 0.0018836 spec pop growth rate
t2 d NaN NaN 144.47 578.932 102.748 367.991 population doubling time
a_b d 13.1806 13.1806 13.1806 13.1806 13.1806 13.1806 age at birth
t_x d 827.53 557.167 350.419 350.419 290.657 290.657 time since birth at weaning
t_p d 21.7384 21.7074 21.5043 21.5043 21.3159 21.3159 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_x - 1 0.377867 1 0.373592 1 0.36959 survival probability at weaning
S_p - 1 0.0756269 1 0.0714899 1 0.0678605 survival probability at puberty
theta_0b - 0.00302381 0.0372417 0.0612809 0.153724 0.0850795 0.211906 frac of ind that is embryo
theta_bx - 0.00302378 0.0223997 0.0575252 0.0906451 0.0778405 0.1233 fraction of individuals that is baby
theta_xp - 0.186821 0.137398 0.706461 0.308038 0.708308 0.336033 fraction of individuals that is juvenile
theta_pi - 0.807131 0.80296 0.174733 0.447593 0.128772 0.328761 frac of ind that is adult
L_bi cm 2.15519 2.12 1.92755 1.95367 1.86961 1.86959 mean structural length of post-natals
L2_bi cm^2 4.6583 4.55958 3.90402 4.07605 3.7334 3.84754 mean squared structural length of post-natals
L3_bi cm^3 10.0838 9.86779 8.13466 8.77173 7.75175 8.3049 mean cubed structural length of post-natals
Ww_bi g 997.196 979.972 831.203 896.299 814.327 872.436 mean wet weight of post-natals
L_pi cm 2.17269 2.18199 2.24541 2.24561 2.30787 2.30887 mean structural length of adults
L2_pi cm^2 4.72057 4.76107 5.04186 5.04276 5.32626 5.3309 mean squared structural length of adults
L3_pi cm^3 10.2563 10.3886 11.321 11.3241 12.2923 12.3084 mean cubed structural length of adults
Ww_pi g 1014.26 1031.69 1156.79 1157.1 1291.32 1293 mean wet weight of adults
R 1/d 0.000287403 0.00353039 0.0257799 0.0258525 0.0479234 0.0482974 mean reproduction rate of adults
J_X g/d 81.5562 80.1696 70.6473 73.7603 69.4761 71.6002 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 yield of faeces on food
Y_VX mol/mol 0 0 0.000552447 0.000142384 0.000752691 0.000218478 yield of living structure on food
Y_VX_d mol/mol 2.89377e-05 7.04619e-05 1.55238e-11 0.000208581 8.66142e-13 0.000316057 yield of dead structure on food
Y_EX mol/mol 0 0 0.0558969 0.0144064 0.078318 0.0227328 yield of living reserve on food
Y_EX_d mol/mol 0.00283275 0.00692712 1.57071e-09 0.0211043 9.01227e-11 0.032886 yield of dead reserve on food
Y_CX mol/mol 0.821181 0.817355 0.771613 0.790656 0.750688 0.771886 yield of CO2 on food
Y_HX mol/mol 0.700347 0.697084 0.658072 0.674313 0.640226 0.658305 yield of H2O on food
Y_OX mol/mol -0.965443 -0.960945 -0.907166 -0.929555 -0.882565 -0.907488 yield of O2 on food
Y_NX mol/mol 0.0665822 0.0662721 0.0625632 0.0641072 0.0608666 0.0625854 yield of N-waste on food
mu_TX J/mol 462804 460570 433848 444973 421623 434007 yield of heat on food

Remarks

  • Reprod-code O applies. Sex ratio is assumed to be 1:1. Parameters of male and female are the same.
  • Buffer handling rule: release each egg as soon as reproduction buffer allows
  • Weights of adults do not include reproduction buffer