Arctocephalus gazella: 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: 2023/04/12
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.885009 0.885009 0.894301 0.894301 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000746253 0.000746253 0.000352671 0.000352671 spec pop growth rate
t2 d NaN NaN NaN NaN 928.837 928.837 1965.42 1965.42 population doubling time
a_b d 267.852 267.852 267.852 267.852 267.852 267.852 267.852 267.852 age at birth
t_x d 3562.05 2807.52 2696.63 2389.19 1248.2 1228.23 1248.2 1228.23 time since birth at weaning
t_p d 134.681 129.947 132.346 127.788 112.01 108.851 112.01 108.851 time since birth at puberty
S_b - 1 1 1 1 1 1 1 1 survival probability at birth
S_x - 0.999998 0.999998 0.648619 0.639632 0.999998 0.999998 0.604239 0.596232 survival probability at weaning
S_p - 0.99851 0.999371 0.304149 0.296537 0.999946 0.99995 0.303531 0.29589 survival probability at puberty
theta_0b - 0.0185753 0.0182991 0.0566259 0.0579645 0.181342 0.181333 0.228405 0.233137 frac of ind that is embryo
theta_bx - 0.0185711 0.018295 0.0450427 0.0457769 0.148457 0.14845 0.160022 0.162244 fraction of individuals that is baby
theta_xp - 0.228313 0.173438 0.193206 0.172081 0.348123 0.343259 0.251052 0.247263 fraction of individuals that is juvenile
theta_pi - 0.73454 0.789968 0.705125 0.724177 0.322078 0.326958 0.36052 0.357357 frac of ind that is adult
L_bi cm 17.3116 17.6787 17.154 17.4943 16.0611 16.2934 16.3186 16.5227 mean structural length of post-natals
L2_bi cm^2 301.272 314.272 297.516 309.699 267.542 275.89 278.118 285.946 mean squared structural length of post-natals
L3_bi cm^3 5262.91 5608.85 5200.21 5527.91 4592.69 4821.15 4905.51 5132.35 mean cubed structural length of post-natals
Ww_bi g 21510.8 23303 21423.1 23149.8 20613.7 22006.5 22017.8 23427 mean wet weight of post-natals
L_pi cm 17.7492 18.1264 17.9228 18.3037 19.1427 19.4904 19.4521 19.8263 mean structural length of adults
L2_pi cm^2 315.034 328.568 321.229 335.032 366.95 380.476 378.854 393.648 mean squared structural length of adults
L3_pi cm^3 5591.59 5955.83 5757.41 6132.55 7043.61 7438.8 7387.5 7826.55 mean cubed structural length of adults
Ww_pi g 22854.2 24744.6 23718.6 25681.9 31614.4 33954.9 33157.9 35724.9 mean wet weight of adults
R 1/d 9.41141e-05 0.000278309 0.000298842 0.000493206 0.00189844 0.00209996 0.00225414 0.00249745 mean reproduction rate of adults
J_X g/d 1063.94 1134.09 1061.71 1129.33 1067.59 1124.94 1109.79 1165.95 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 0.00321032 0.0031982 0.00155888 0.00155241 yield of living structure on food
Y_VX_d mol/mol 0.00037163 0.000366356 0.000688433 0.000686181 5.00179e-06 4.73226e-06 0.00146943 0.00149003 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.0111988 0.0114002 0.00543795 0.00553368 yield of living reserve on food
Y_EX_d mol/mol 0.00114732 0.00115574 0.00214768 0.00218741 1.74481e-05 1.68685e-05 0.00512592 0.00531132 yield of dead reserve on food
Y_CX mol/mol 0.215392 0.215389 0.214173 0.214139 0.203448 0.203273 0.204224 0.203951 yield of CO2 on food
Y_HX mol/mol 0.183698 0.183695 0.182658 0.182629 0.173511 0.173362 0.174173 0.17394 yield of H2O on food
Y_OX mol/mol -0.253231 -0.253228 -0.251799 -0.251758 -0.239188 -0.238984 -0.240101 -0.23978 yield of O2 on food
Y_NX mol/mol 0.0174642 0.017464 0.0173654 0.0173626 0.0164958 0.0164816 0.0165587 0.0165366 yield of N-waste on food
mu_TX J/mol 154553 154551 153856 153836 147711 147608 148156 147997 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