Arctocephalus philippii: 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: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.944387 NaN 0.95385 0.95385 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000821984 0.000821984 0.000326571 0.000326571 spec pop growth rate
t2 d NaN NaN NaN NaN 843.262 843.262 2122.5 2122.5 population doubling time
a_b d 158.808 NaN 158.808 NaN 158.808 158.808 158.808 158.808 age at birth
t_x d 2535.18 NaN 1874.41 NaN 1193.63 735.436 1193.63 735.436 time since birth at weaning
t_p d 235.667 NaN 232.374 NaN 218.21 175.226 218.21 175.226 time since birth at puberty
S_b - 1 NaN 1 NaN 1 1 1 1 survival probability at birth
S_x - 0.999999 NaN 0.590933 NaN 0.999999 1 0.574 0.509394 survival probability at weaning
S_p - 0.999193 NaN 0.234045 NaN 0.999942 0.99999 0.23151 0.20481 survival probability at puberty
theta_0b - 0.0163345 NaN 0.0630397 NaN 0.122604 0.122495 0.172302 0.214339 frac of ind that is embryo
theta_bx - 0.0163333 NaN 0.0477795 NaN 0.107593 0.107496 0.122458 0.143477 fraction of individuals that is baby
theta_xp - 0.244363 NaN 0.203043 NaN 0.442002 0.291002 0.285715 0.199959 fraction of individuals that is juvenile
theta_pi - 0.722969 NaN 0.686138 NaN 0.327801 0.479006 0.419525 0.442225 frac of ind that is adult
L_bi cm 21.5195 NaN 21.1635 NaN 19.6468 22.8709 19.9996 22.8127 mean structural length of post-natals
L2_bi cm^2 466.083 NaN 454.944 NaN 399.924 552.045 416.896 559.416 mean squared structural length of post-natals
L3_bi cm^3 10138.8 NaN 9879.8 NaN 8362.01 13846.2 8949.84 14393.6 mean cubed structural length of post-natals
Ww_bi g 47770 NaN 46917 NaN 41226 80748.3 44124.1 83940.9 mean wet weight of post-natals
L_pi cm 22.0991 NaN 22.308 NaN 23.045 27.0827 23.206 27.7537 mean structural length of adults
L2_pi cm^2 488.371 NaN 497.651 NaN 531.201 735.848 538.609 772.268 mean squared structural length of adults
L3_pi cm^3 10792.6 NaN 11101.7 NaN 12247.4 20055 12503.2 21540.3 mean cubed structural length of adults
Ww_pi g 50850.2 NaN 52719.5 NaN 60381.4 116957 61642.8 125619 mean wet weight of adults
R 1/d 0.000142227 NaN 0.000577768 NaN 0.00220451 0.00980578 0.00251859 0.0114617 mean reproduction rate of adults
J_X g/d 3655.27 NaN 3603.66 NaN 3321.11 5636.12 3462.05 5711.37 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.765625 NaN 0.765625 NaN 0.765625 0.765625 0.765625 0.765625 yield of faeces on food
Y_VX mol/mol 0 NaN 0 NaN 0.00206962 0.00201936 0.000844226 0.000823014 yield of living structure on food
Y_VX_d mol/mol 0.000308889 NaN 0.000611348 NaN 6.45756e-06 3.51385e-06 0.000981769 0.001055 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.00813392 0.00975715 0.00331794 0.00397665 yield of living reserve on food
Y_EX_d mol/mol 0.00114647 NaN 0.00229181 NaN 2.53792e-05 1.69783e-05 0.0038585 0.00509756 yield of dead reserve on food
Y_CX mol/mol 0.215451 NaN 0.214111 NaN 0.207329 0.205885 0.20847 0.206666 yield of CO2 on food
Y_HX mol/mol 0.183748 NaN 0.182606 NaN 0.176821 0.175589 0.177794 0.176256 yield of H2O on food
Y_OX mol/mol -0.2533 NaN -0.251726 NaN -0.243752 -0.242054 -0.245093 -0.242972 yield of O2 on food
Y_NX mol/mol 0.017469 NaN 0.0173604 NaN 0.0168105 0.0166934 0.0169029 0.0167567 yield of N-waste on food
mu_TX J/mol 154584 NaN 153816 NaN 149923 149076 150578 149526 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