Arctica islandica: Population traits

at T = 6 °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: 2025/05/22
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.321913 0.321913 0.660956 0.660956 1 1 scaled functional response
r 1/d 0 0 0.00152716 0.000364049 0.00279365 0.000645734 spec pop growth rate
t2 d NaN NaN 453.879 1903.99 248.115 1073.43 population doubling time
a_b d 10.2409 10.2409 9.15492 9.15492 8.56118 8.56118 age at birth
t_j d 165.607 165.607 82.0298 82.0298 55.4758 55.4758 time since birth at metam
t_p d 35375.5 35375.5 7085.42 7085.42 4276.94 4276.94 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.853462 1 0.750605 1 0.672286 survival probability at metam
S_p - 1 0.077121 1 0.0765 1 0.0763067 survival probability at puberty
theta_0b - 5.13012e-05 0.106365 0.013715 0.202165 0.023348 0.261251 frac of ind that is embryo
theta_bj - 5.20415e-05 0.0997856 0.0136934 0.177378 0.0230814 0.217177 frac of ind between b and j
theta_jp - 0.000789527 0.528653 0.102436 0.474518 0.117134 0.389871 frac of ind between j and p
theta_pi - 0.999107 0.265197 0.870156 0.145939 0.836436 0.131701 frac of ind that is adult
L_bi cm 1.52199 0.220348 0.260813 0.0428562 0.219575 0.041072 mean structural length of post-natals
L2_bi cm^2 2.36018 0.283943 0.123262 0.00956362 0.0897262 0.00805972 mean squared structural length of post-natals
L3_bi cm^3 3.68366 0.431906 0.081577 0.0080932 0.0529097 0.00642098 mean cubed structural length of post-natals
Ww_bi g 3.91895 0.459495 0.0922759 0.00915463 0.0634083 0.00769507 mean wet weight of post-natals
L_pi cm 1.52325 0.688977 0.292067 0.133494 0.251928 0.126389 mean structural length of adults
L2_pi cm^2 2.36217 0.955531 0.139612 0.0498858 0.104642 0.0427359 mean squared structural length of adults
L3_pi cm^3 3.68676 1.45537 0.0924611 0.0441844 0.0617754 0.0359549 mean cubed structural length of adults
Ww_pi g 3.92225 1.54833 0.104587 0.0499792 0.0740332 0.0430892 mean wet weight of adults
R 1/d 5.53503 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.00553705 0.000665813 0.000595236 4.5409e-05 0.000656021 5.77528e-05 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 0.209297 0.0648841 0.225315 0.071793 yield of living structure on food
Y_VX_d mol/mol 0.00363308 0.0102845 1.82094e-07 0.131376 5.29497e-08 0.145451 yield of dead structure on food
Y_EX mol/mol 0 0 0.0274494 0.00850957 0.0447082 0.0142455 yield of living reserve on food
Y_EX_d mol/mol 0.000232065 0.000656928 2.38816e-08 0.01723 1.05066e-08 0.0288611 yield of dead reserve on food
Y_CX mol/mol 0.88676 0.879684 0.653878 0.668626 0.620602 0.630275 yield of CO2 on food
Y_HX mol/mol 0.643394 0.638259 0.474425 0.485125 0.450281 0.457299 yield of H2O on food
Y_OX mol/mol -0.964351 -0.956656 -0.711092 -0.727131 -0.674904 -0.685424 yield of O2 on food
Y_NX mol/mol 0.133014 0.131953 0.0980817 0.100294 0.0930903 0.0945412 yield of N-waste on food
mu_TX J/mol 470556 466996 352754 360213 335253 340170 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