Hippopotamus amphibius: Population traits

at T = 36.1 °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 - 0.691203 0.769686 0.884843 0.884843 1 1 scaled functional response
r 1/d 0 0 0.000379995 3.19497e-05 0.000502996 4.62694e-05 spec pop growth rate
t2 d NaN NaN 1824.1 21695 1378.04 14980.7 population doubling time
a_b d 244.04 244.04 244.04 244.04 244.04 244.04 age at birth
t_x d 4395.26 2121.51 1531.03 1531.03 1279.13 1279.13 time since birth at weaning
t_p d 468.372 423.146 379.323 379.323 350.154 350.154 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_x - 1 0.44903 1 0.421712 1 0.400912 survival probability at weaning
S_p - 0.999784 0.101727 0.999993 0.100913 0.999996 0.100301 survival probability at puberty
theta_0b - 0.00650757 0.0737314 0.0886211 0.142938 0.115553 0.193879 frac of ind that is embryo
theta_bx - 0.00650654 0.0486911 0.0807602 0.0908616 0.102189 0.11985 fraction of individuals that is baby
theta_xp - 0.110673 0.100095 0.321471 0.134514 0.317564 0.146323 fraction of individuals that is juvenile
theta_pi - 0.876313 0.777482 0.509148 0.631686 0.464694 0.539948 frac of ind that is adult
L_bi cm 58.484 61.4465 57.8387 64.4559 58.6959 66.8706 mean structural length of post-natals
L2_bi cm^2 3442.05 3915.06 3635.98 4507.03 3852.38 5066.55 mean squared structural length of post-natals
L3_bi cm^3 203292 253693 240498 327198 271215 406479 mean cubed structural length of post-natals
Ww_bi g 892201 1.21101e+06 1.28381e+06 1.74662e+06 1.6009e+06 2.39932e+06 mean wet weight of post-natals
L_pi cm 59.5931 66.0982 70.8958 74.9087 75.3709 82.9193 mean structural length of adults
L2_pi cm^2 3551.35 4369.94 5051.18 5622.33 5744.16 6915.35 mean squared structural length of adults
L3_pi cm^3 211637 288968 361560 422710 442332 579478 mean cubed structural length of adults
Ww_pi g 928822 1.3794e+06 1.93005e+06 2.25647e+06 2.61095e+06 3.42048e+06 mean wet weight of adults
R 1/d 3.04238e-05 0.000388513 0.00068057 0.000923414 0.000957544 0.00146277 mean reproduction rate of adults
J_X g/d 3548.35 4494.23 4798.33 5947.85 5745.56 7556.4 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 0.0190457 0.00175759 0.0237436 0.00248895 yield of living structure on food
Y_VX_d mol/mol 0.00160201 0.00418085 1.89871e-05 0.0057832 1.08769e-05 0.00718108 yield of dead structure on food
Y_EX mol/mol 0 0 0.0826227 0.00762464 0.116408 0.0122026 yield of living reserve on food
Y_EX_d mol/mol 0.00542885 0.0157766 8.23685e-05 0.0250882 5.33259e-05 0.0352067 yield of dead reserve on food
Y_CX mol/mol 0.817325 0.805367 0.729691 0.786594 0.694129 0.77103 yield of CO2 on food
Y_HX mol/mol 0.697058 0.68686 0.622319 0.670849 0.59199 0.657575 yield of H2O on food
Y_OX mol/mol -0.960909 -0.946851 -0.85788 -0.924779 -0.816071 -0.906481 yield of O2 on food
Y_NX mol/mol 0.0662696 0.0653001 0.0591641 0.0637779 0.0562807 0.0625159 yield of N-waste on food
mu_TX J/mol 460628 453766 410262 442957 389703 433963 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