Spheniscus demersus: Population traits

at T = 38.2 °C with background hazards for embryo, juv, adult: 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 std f_minf f_max date: 2023/10/02
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.874343 0.91287 0.956435 0.956435 1 1 scaled functional response
r 1/d 0 0 0.00121582 0.000114746 0.00166992 0.000194072 spec pop growth rate
t2 d NaN NaN 570.107 6040.72 415.078 3571.59 population doubling time
a_b d 34.6058 34.5143 34.4198 34.4198 34.3334 34.3334 age at birth
t_p d 489.702 283.565 227.127 227.127 197.423 197.423 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_p - 1 0.402461 1 0.394182 1 0.386744 survival probability at puberty
theta_0b - 0.00310154 0.0279397 0.0410314 0.0527753 0.0557521 0.0751318 frac of ind that is embryo
theta_bp - 0.00310073 0.0172863 0.0393396 0.0322154 0.0526319 0.0453403 fraction of individuals that is juvenile
theta_pi - 0.993798 0.954774 0.919629 0.915009 0.891616 0.879528 frac of ind that is adult
L_bi cm 5.13732 5.29229 5.19856 5.44036 5.25071 5.58179 mean structural length of post-natals
L2_bi cm^2 26.4432 28.2519 27.7553 30.1197 28.6177 31.9937 mean squared structural length of post-natals
L3_bi cm^3 136.26 151.451 150.496 168.153 159.416 185.693 mean cubed structural length of post-natals
Ww_bi g 2008.32 2323.9 2412.26 2695.29 2664.38 3103.55 mean wet weight of post-natals
L_pi cm 5.1462 5.34771 5.32163 5.55292 5.4228 5.75332 mean structural length of adults
L2_pi cm^2 26.5091 28.6717 28.7081 30.9998 29.9793 33.376 mean squared structural length of adults
L3_pi cm^3 136.646 153.981 156.371 173.654 168.035 194.64 mean cubed structural length of adults
Ww_pi g 2014 2362.73 2506.44 2783.46 2808.42 3253.1 mean wet weight of adults
R 1/d 7.28164e-05 0.00152244 0.00169263 0.00306282 0.00256201 0.00460283 mean reproduction rate of adults
J_X g/d 79.7294 88.9361 91.5427 99.3409 98.6863 110.328 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 0.0019988 0.000194228 0.00269756 0.000326642 yield of living structure on food
Y_VX_d mol/mol 0.000155599 0.000371108 2.22476e-06 0.000483557 1.12195e-06 0.0006093 yield of dead structure on food
Y_EX mol/mol 0 0 0.0300396 0.00291902 0.0423878 0.00513264 yield of living reserve on food
Y_EX_d mol/mol 0.00213776 0.00532326 3.34355e-05 0.00726729 1.76296e-05 0.00957416 yield of dead reserve on food
Y_CX mol/mol 0.721769 0.719006 0.697573 0.714806 0.686986 0.710923 yield of CO2 on food
Y_HX mol/mol 0.768407 0.765465 0.742647 0.760993 0.731376 0.75686 yield of H2O on food
Y_OX mol/mol -0.916092 -0.912585 -0.885381 -0.907253 -0.871943 -0.902325 yield of O2 on food
Y_NX mol/mol 0.166562 0.165924 0.160978 0.164955 0.158535 0.164059 yield of N-waste on food
mu_TX J/mol 463118 461290 447104 458509 440091 455937 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