Arctocephalus australis: Population traits

at T = 37.5 °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_min f_max date: 2025/05/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.855821 0.855821 0.867441 0.867441 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000796661 0.000796661 0.000325275 0.000325275 spec pop growth rate
t2 d NaN NaN NaN NaN 870.066 870.066 2130.96 2130.96 population doubling time
a_b d 235.747 235.747 235.747 235.747 235.747 235.747 235.747 235.747 age at birth
t_x d 3276.06 975.17 2387.3 950.018 1071.77 758.967 1071.77 758.967 time since birth at weaning
t_p d 549.249 313.445 532.691 309.037 409.231 270.638 409.231 270.638 time since birth at puberty
S_b - 1 1 1 1 1 1 1 1 survival probability at birth
S_x - 0.999999 1 0.618331 0.500077 0.999999 1 0.566567 0.464988 survival probability at weaning
S_p - 0.999514 0.999993 0.266798 0.210365 0.999986 0.999997 0.26434 0.209005 survival probability at puberty
theta_0b - 0.0139952 0.0109241 0.0497585 0.0741927 0.171297 0.171266 0.222477 0.30271 frac of ind that is embryo
theta_bx - 0.0139929 0.0109224 0.0386119 0.0516935 0.141945 0.14192 0.153462 0.189302 fraction of individuals that is baby
theta_xp - 0.180437 0.0342581 0.154029 0.0690152 0.334073 0.234146 0.226946 0.167801 fraction of individuals that is juvenile
theta_pi - 0.791575 0.943895 0.7576 0.805099 0.352685 0.452669 0.397115 0.340187 frac of ind that is adult
L_bi cm 19.2806 27.5451 19.1623 26.6544 18.0346 22.7759 18.503 22.1389 mean structural length of post-natals
L2_bi cm^2 373.532 765.207 371.341 731.713 340.203 565.09 361.327 554.737 mean squared structural length of post-natals
L3_bi cm^3 7260.77 21364 7250.36 20408.9 6650.67 14925.1 7344.9 15154.2 mean cubed structural length of post-natals
Ww_bi g 26406.8 102398 26628.5 98870.8 27142.4 81073.1 29975.7 82317.8 mean wet weight of post-natals
L_pi cm 19.6852 28.043 19.9391 28.3213 21.7287 28.1776 22.2355 29.5764 mean structural length of adults
L2_pi cm^2 387.507 787.209 397.572 803.341 473.124 804.497 495.305 886.62 mean squared structural length of adults
L3_pi cm^3 7628.16 22117.5 7927.35 22817.2 10322.9 23255.6 11051.8 26897.3 mean cubed structural length of adults
Ww_pi g 27743 106009 29114.9 110538 42129.3 126325 45104.2 146106 mean wet weight of adults
R 1/d 7.49526e-05 0.00648127 0.000278287 0.00682418 0.0018725 0.00685178 0.00228579 0.00857431 mean reproduction rate of adults
J_X g/d 1329.77 3918.46 1339.92 3797.81 1415.15 3381.19 1503.02 3319.25 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.765625 0.765625 0.765625 0.765625 0.765625 0.765625 0.765625 0.765625 yield of faeces on food
Y_VX mol/mol 0 0 0 0 0.003744 0.00351657 0.00158954 0.00148506 yield of living structure on food
Y_VX_d mol/mol 0.000345577 0.000271594 0.00067341 0.000604513 2.19987e-06 9.32322e-07 0.00166701 0.00189831 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.0115358 0.0155855 0.0048976 0.00658179 yield of living reserve on food
Y_EX_d mol/mol 0.000911257 0.00103016 0.00179983 0.00232405 6.77812e-06 4.13206e-06 0.00513631 0.00841332 yield of dead reserve on food
Y_CX mol/mol 0.215634 0.215593 0.214509 0.214088 0.202655 0.199123 0.204503 0.199797 yield of CO2 on food
Y_HX mol/mol 0.183904 0.183869 0.182945 0.182586 0.172835 0.169822 0.174411 0.170397 yield of H2O on food
Y_OX mol/mol -0.253516 -0.253467 -0.252193 -0.251698 -0.238256 -0.234104 -0.240429 -0.234896 yield of O2 on food
Y_NX mol/mol 0.0174839 0.0174805 0.0173926 0.0173585 0.0164315 0.0161451 0.0165813 0.0161997 yield of N-waste on food
mu_TX J/mol 154693 154665 154051 153802 147274 145197 148330 145585 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