Homarus americanus: Population traits

at T = 10 °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_min f_max date: 2024/05/09
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.190031 0.190031 0.190031 0.190031 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00374279 0.00374279 0.000685014 0.000685014 spec pop growth rate
t2 d NaN NaN NaN NaN 185.195 185.195 1011.87 1011.87 population doubling time
a_b d 110.751 110.751 110.751 110.751 103.382 103.382 103.382 103.382 age at birth
t_j d 126.396 126.396 126.396 126.396 92.4449 92.4449 92.4449 92.4449 time since birth at metam
t_p d 6919.9 3071 6919.9 3071 2019.05 1492.1 2019.05 1492.1 time since birth at puberty
S_b - 1 1 1 1 1 1 1 1 survival probability at birth
S_j - 0.999999 0.999999 0.114302 0.114302 1 1 0.0815474 0.0815474 survival probability at metam
S_p - 0.999999 0.999999 0.0841389 0.0841389 1 1 0.0675449 0.0675449 survival probability at puberty
theta_0b - 0.00442609 0.00442609 0.604418 0.604418 0.320748 0.320748 0.72609 0.72609 frac of ind that is embryo
theta_bj - 0.00442949 0.00442949 0.24701 0.24701 0.198674 0.198674 0.225288 0.225288 frac of ind between b and j
theta_jp - 0.000625699 0.000625699 0.00841212 0.00841212 0.019275 0.019275 0.00514828 0.00514828 frac of ind between j and p
theta_pi - 0.990519 0.990519 0.14016 0.14016 0.461303 0.461303 0.0434734 0.0434734 frac of ind that is adult
L_bi cm 1.50277 1.50277 0.375262 0.375262 0.323526 0.323526 0.121351 0.121351 mean structural length of post-natals
L2_bi cm^2 2.33896 2.33896 0.45099 0.45099 0.186213 0.186213 0.0490919 0.0490919 mean squared structural length of post-natals
L3_bi cm^3 3.68671 3.68671 0.675914 0.675914 0.156409 0.156409 0.0682427 0.0682427 mean cubed structural length of post-natals
Ww_bi g 29.1239 29.1239 5.33952 5.33952 5.83535 5.83535 2.54602 2.54602 mean wet weight of post-natals
L_pi cm 1.51 1.51 0.927328 0.927328 0.434658 0.434658 0.37212 0.37212 mean structural length of adults
L2_pi cm^2 2.35086 2.35086 1.26284 1.26284 0.270237 0.270237 0.278419 0.278419 mean squared structural length of adults
L3_pi cm^3 3.70552 3.70552 1.90687 1.90687 0.229906 0.229906 0.427366 0.427366 mean cubed structural length of adults
Ww_pi g 29.2725 29.2725 15.0637 15.0637 8.57742 8.57742 15.9443 15.9443 mean wet weight of adults
R 1/d 0.661931 12.6039 0 2.98396 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.0786604 0.0786604 0.0151246 0.0151246 0.0331987 0.0331987 0.00848238 0.00848238 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 0.0176334 0.0176334 0.0055111 0.0055111 yield of living structure on food
Y_VX_d mol/mol 0.00216992 0.00216992 0.00587171 0.00587171 2.24563e-07 2.24563e-07 0.0112394 0.0112394 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.64024 0.64024 0.200099 0.200099 yield of living reserve on food
Y_EX_d mol/mol 0.0149718 0.0149718 0.040513 0.040513 8.1535e-06 8.1535e-06 0.408084 0.408084 yield of dead reserve on food
Y_CX mol/mol 0.873483 0.873483 0.84424 0.84424 0.232743 0.232743 0.265692 0.265692 yield of CO2 on food
Y_HX mol/mol 0.629879 0.629879 0.608791 0.608791 0.167834 0.167834 0.191594 0.191594 yield of H2O on food
Y_OX mol/mol -0.949913 -0.949913 -0.918111 -0.918111 -0.253108 -0.253108 -0.28894 -0.28894 yield of O2 on food
Y_NX mol/mol 0.131022 0.131022 0.126636 0.126636 0.0349115 0.0349115 0.0398539 0.0398539 yield of N-waste on food
mu_TX J/mol 463181 463181 447282 447282 111547 111547 129625 129625 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