Homarus gammarus: Population traits

at T = 8 °C with background hazards for embryo, larva, 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 abj f_minf f_max date: 2024/05/09
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.329374 0.330638 0.665319 0.665319 1 1 scaled functional response
r 1/d 0 0 0.00208936 0.000295529 0.00277088 0.000365708 spec pop growth rate
t2 d NaN NaN 331.751 2345.44 250.155 1895.36 population doubling time
a_b d 92.3644 92.3133 84.3767 84.3767 80.9826 80.9826 age at birth
t_j d 142.452 142.07 93.3882 93.3882 77.9042 77.9042 time since birth at metam
t_p d 10885 10567.7 2981.98 2981.98 2233.92 2233.92 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 0.999999 0.278744 0.999999 0.166831 0.999999 0.137128 survival probability at metam
S_p - 0.999998 0.140014 0.999999 0.137789 0.999999 0.130225 survival probability at puberty
theta_0b - 0.00359026 0.44915 0.161533 0.594283 0.2009 0.631251 frac of ind that is embryo
theta_bj - 0.00359335 0.253808 0.135522 0.27085 0.15515 0.257489 frac of ind between b and j
theta_jp - 0.00194862 0.0488186 0.0131117 0.00927895 0.00546966 0.00307111 frac of ind between j and p
theta_pi - 0.990868 0.248223 0.689833 0.125589 0.63848 0.108189 frac of ind that is adult
L_bi cm 3.60209 0.997582 1.02703 0.446112 0.976516 0.431767 mean structural length of post-natals
L2_bi cm^2 13.6147 2.8289 1.72652 0.727052 1.6066 0.716023 mean squared structural length of post-natals
L3_bi cm^3 52.3991 10.2058 3.93873 2.82754 3.70627 3.24257 mean cubed structural length of post-natals
Ww_bi g 88.8892 17.3403 9.47921 6.80494 11.5423 10.0982 mean wet weight of post-natals
L_pi cm 3.62101 1.97318 1.20143 1.00007 1.16665 0.991762 mean structural length of adults
L2_pi cm^2 13.6906 6.22875 2.08794 2.25858 1.99802 2.34138 mean squared structural length of adults
L3_pi cm^3 52.6921 22.6381 4.78492 9.11534 4.63561 11.0306 mean cubed structural length of adults
Ww_pi g 89.3862 38.4634 11.5157 21.9376 14.4366 34.3523 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.15479 0.0322139 0.0398195 0.0165969 0.0557709 0.0245979 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 0.206668 0.0503479 0.18414 0.0482087 yield of living structure on food
Y_VX_d mol/mol 0.016189 0.0411793 2.03809e-05 0.101974 9.17885e-06 0.0969836 yield of dead structure on food
Y_EX mol/mol 0 0 0.290713 0.0708226 0.389321 0.101926 yield of living reserve on food
Y_EX_d mol/mol 0.0112738 0.0287867 2.8669e-05 0.143444 1.94066e-05 0.20505 yield of dead reserve on food
Y_CX mol/mol 0.863162 0.820659 0.393195 0.524037 0.317136 0.438457 yield of CO2 on food
Y_HX mol/mol 0.622436 0.591786 0.283537 0.377889 0.22869 0.316176 yield of H2O on food
Y_OX mol/mol -0.938689 -0.892467 -0.427599 -0.56989 -0.344885 -0.476822 yield of O2 on food
Y_NX mol/mol 0.129474 0.123099 0.0589792 0.0786055 0.0475704 0.0657685 yield of N-waste on food
mu_TX J/mol 458205 436078 209248 278493 166288 231067 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