Arctocephalus tropicalis: 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 - 0.899424 0.899424 0.910723 0.910723 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000742783 0.000742783 0.000311515 0.000311515 spec pop growth rate
t2 d NaN NaN NaN NaN 933.176 933.176 2225.09 2225.09 population doubling time
a_b d 266.005 266.005 266.005 266.005 266.005 266.005 266.005 266.005 age at birth
t_x d 3359.62 982.802 2463.78 960.489 1318.44 829.013 1318.44 829.013 time since birth at weaning
t_p d 275.124 201.375 270.566 199.467 241.893 186.758 241.893 186.758 time since birth at puberty
S_b - 1 1 1 1 1 1 1 1 survival probability at birth
S_x - 0.999997 0.999998 0.57057 0.475299 0.999997 0.999998 0.537573 0.452676 survival probability at weaning
S_p - 0.998174 0.999976 0.249861 0.215372 0.999916 0.999985 0.246511 0.213267 survival probability at puberty
theta_0b - 0.0198 0.0162282 0.0717041 0.0990875 0.179505 0.179401 0.237974 0.307441 frac of ind that is embryo
theta_bx - 0.0197968 0.0162253 0.053214 0.0670695 0.1473 0.147212 0.15839 0.188004 fraction of individuals that is baby
theta_xp - 0.230131 0.0437213 0.186447 0.0787246 0.365712 0.230305 0.241625 0.159663 fraction of individuals that is juvenile
theta_pi - 0.730273 0.923825 0.688635 0.755118 0.307482 0.443083 0.362011 0.344892 frac of ind that is adult
L_bi cm 16.7998 22.6277 16.581 21.7019 15.3686 18.7442 15.6603 18.3205 mean structural length of post-natals
L2_bi cm^2 284.009 517.424 279.022 487.304 246.264 378.622 257.863 373.153 mean squared structural length of post-natals
L3_bi cm^3 4822.07 11906.6 4741.62 11152.8 4077.65 8078.17 4406.86 8184.98 mean cubed structural length of post-natals
Ww_bi g 30711.7 98752.8 30519.1 93522.7 28418.6 73588.5 30713 74561.5 mean wet weight of post-natals
L_pi cm 17.2541 23.1578 17.4576 23.3535 18.5157 22.9475 18.7852 23.8811 mean structural length of adults
L2_pi cm^2 297.705 536.913 304.77 546.329 343.142 531.535 353.147 575.532 mean squared structural length of adults
L3_pi cm^3 5136.64 12461.1 5320.64 12799.9 6364.97 12421.3 6643.68 13984.4 mean cubed structural length of adults
Ww_pi g 32715.1 103351 34245.9 107335 44359.7 113152 46302.1 127392 mean wet weight of adults
R 1/d 0.000101751 0.00838255 0.000390867 0.00876041 0.00198457 0.00802132 0.00236926 0.00982937 mean reproduction rate of adults
J_X g/d 1549.93 3836.15 1541.84 3658.23 1494.23 3120.97 1564.6 3075.9 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 0.00202701 0.00192258 0.000877412 0.000828942 yield of living structure on food
Y_VX_d mol/mol 0.000251811 0.000208298 0.000490842 0.000451753 4.50186e-06 2.31922e-06 0.000948721 0.00105125 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.0120999 0.0155913 0.00523758 0.00672235 yield of living reserve on food
Y_EX_d mol/mol 0.00135197 0.00151931 0.00266843 0.00333645 2.68732e-05 1.88079e-05 0.00566325 0.00852516 yield of dead reserve on food
Y_CX mol/mol 0.215313 0.215199 0.213875 0.213293 0.2037 0.200577 0.205024 0.200954 yield of CO2 on food
Y_HX mol/mol 0.183631 0.183533 0.182404 0.181907 0.173727 0.171063 0.174856 0.171384 yield of H2O on food
Y_OX mol/mol -0.253139 -0.253004 -0.251447 -0.250763 -0.239486 -0.235814 -0.241042 -0.236256 yield of O2 on food
Y_NX mol/mol 0.0174578 0.0174486 0.0173412 0.017294 0.0165163 0.016263 0.0166236 0.0162935 yield of N-waste on food
mu_TX J/mol 154501 154432 153671 153329 147800 145968 148563 146186 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