Hystrix africaeaustralis: 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_minf f_max date: 2022/12/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.926263 0.931991 0.965995 0.965995 1 1 scaled functional response
r 1/d 0 0 0.00227441 0.00052078 0.00333594 0.000850137 spec pop growth rate
t2 d NaN NaN 304.759 1330.98 207.782 815.336 population doubling time
a_b d 12.0181 12.0181 12.0181 12.0181 12.0181 12.0181 age at birth
t_x d 950.741 678.689 444.216 444.216 367.863 367.863 time since birth at weaning
t_p d 138.723 137.315 129.659 129.659 123.023 123.023 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_x - 1 0.689454 1 0.679501 1 0.669972 survival probability at weaning
S_p - 0.999952 0.110769 0.999996 0.105621 0.999998 0.101508 survival probability at puberty
theta_0b - 0.0012506 0.0109216 0.0269652 0.0495952 0.0392992 0.0754983 frac of ind that is embryo
theta_bx - 0.0012506 0.0090385 0.026238 0.040497 0.0377547 0.060976 fraction of individuals that is baby
theta_xp - 0.0976818 0.0940161 0.592541 0.276962 0.641351 0.346907 fraction of individuals that is juvenile
theta_pi - 0.899817 0.886024 0.354256 0.632946 0.281595 0.516619 frac of ind that is adult
L_bi cm 17.9006 17.7374 16.1937 16.8642 15.7559 16.4024 mean structural length of post-natals
L2_bi cm^2 321.253 317.844 274.032 297.834 263.433 288.607 mean squared structural length of post-natals
L3_bi cm^3 5773.63 5724.13 4764.99 5388.04 4575.23 5275.48 mean cubed structural length of post-natals
Ww_bi g 9135.56 9077.85 7658.61 8660.03 7451.42 8591.89 mean wet weight of post-natals
L_pi cm 18.0405 18.1517 18.7623 18.7998 19.3261 19.427 mean structural length of adults
L2_pi cm^2 325.46 329.486 352.028 353.433 373.523 377.419 mean squared structural length of adults
L3_pi cm^3 5871.48 5980.74 6605.03 6644.53 7219.7 7332.57 mean cubed structural length of adults
Ww_pi g 9290.38 9484.8 10616.1 10679.5 11758.3 11942.2 mean wet weight of adults
R 1/d 0.000116476 0.00102507 0.00624649 0.00649936 0.0113787 0.0120978 mean reproduction rate of adults
J_X g/d 368.844 367.187 328.123 356.624 326.536 357.74 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 0.0330289 0.00786819 0.0467412 0.0125367 yield of living structure on food
Y_VX_d mol/mol 0.00165856 0.00385951 1.84125e-06 0.010786 7.61824e-07 0.0168794 yield of dead structure on food
Y_EX mol/mol 0 0 0.0200574 0.0047781 0.0293836 0.00788114 yield of living reserve on food
Y_EX_d mol/mol 0.000965763 0.00226125 1.11813e-06 0.00654998 4.78917e-07 0.0106112 yield of dead reserve on food
Y_CX mol/mol 0.821401 0.818166 0.774721 0.796095 0.753412 0.779513 yield of CO2 on food
Y_HX mol/mol 0.700534 0.697776 0.660723 0.678952 0.642549 0.66481 yield of H2O on food
Y_OX mol/mol -0.965701 -0.961898 -0.91082 -0.935949 -0.885768 -0.916454 yield of O2 on food
Y_NX mol/mol 0.0666001 0.0663378 0.0628152 0.0645482 0.0610874 0.0632037 yield of N-waste on food
mu_TX J/mol 463014 461233 437289 449068 425515 439910 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