Ilisha africana: Population traits

at T = 27.5 °C with background hazards for embryo, larva, 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 abj f_minf f_max date: 2025/05/23
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.233763 0.233763 0.616881 0.616881 1 1 scaled functional response
r 1/d 0 0 0.0335762 0.00782006 0.0428634 0.00868801 spec pop growth rate
t2 d NaN NaN 20.644 88.637 16.1711 79.782 population doubling time
a_b d 7.98335 7.98335 7.37213 7.37213 7.19953 7.19953 age at birth
t_j d 0.739713 0.739713 0.518671 0.518671 0.468779 0.468779 time since birth at metam
t_p d 654.019 654.019 126.852 126.852 101.86 101.86 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.858545 1 0.84879 1 0.846781 survival probability at metam
S_p - 1 0.395388 1 0.292183 1 0.266375 survival probability at puberty
theta_0b - 0.00337014 0.102493 0.219219 0.490538 0.265467 0.524478 frac of ind that is embryo
theta_bj - 0.000312414 0.0088121 0.0134796 0.0308724 0.014612 0.0304374 frac of ind between b and j
theta_jp - 0.00305931 0.0538581 0.157724 0.214084 0.180424 0.218903 frac of ind between j and p
theta_pi - 0.993258 0.834837 0.609577 0.264506 0.539497 0.226181 frac of ind that is adult
L_bi cm 0.649987 0.579108 0.40295 0.313209 0.391932 0.308917 mean structural length of post-natals
L2_bi cm^2 0.426974 0.365851 0.223184 0.179001 0.21915 0.189497 mean squared structural length of post-natals
L3_bi cm^3 0.281814 0.237797 0.156002 0.162288 0.161774 0.209336 mean cubed structural length of post-natals
Ww_bi g 0.776463 0.655185 0.87859 0.91399 1.37647 1.78116 mean wet weight of post-natals
L_pi cm 0.65173 0.612655 0.474095 0.471307 0.477997 0.488843 mean structural length of adults
L2_pi cm^2 0.428359 0.391982 0.279403 0.325416 0.289542 0.374195 mean squared structural length of adults
L3_pi cm^3 0.282762 0.255466 0.198797 0.309659 0.218812 0.436337 mean cubed structural length of adults
Ww_pi g 0.779073 0.703868 1.11961 1.74397 1.86178 3.71262 mean wet weight of adults
R 1/d 0.127926 0 0.0189809 0.315477 0.10487 0.534721 mean reproduction rate of adults
J_X g/d 0.0489383 0.0419323 0.067761 0.054342 0.107944 0.0933302 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 0.0773005 0.0233539 0.0642386 0.0194869 yield of living structure on food
Y_VX_d mol/mol 0.00256981 0.00663113 1.03157e-06 0.0413476 4.41968e-07 0.0352892 yield of dead structure on food
Y_EX mol/mol 0 0 0.358049 0.108173 0.482342 0.146319 yield of living reserve on food
Y_EX_d mol/mol 0.00451061 0.0116392 4.77816e-06 0.191519 3.31856e-06 0.264972 yield of dead reserve on food
Y_CX mol/mol 0.883545 0.872355 0.455269 0.526231 0.344041 0.424558 yield of CO2 on food
Y_HX mol/mol 0.635661 0.627611 0.327541 0.378594 0.247518 0.305446 yield of H2O on food
Y_OX mol/mol -0.960855 -0.948686 -0.495105 -0.572277 -0.374145 -0.461707 yield of O2 on food
Y_NX mol/mol 0.132532 0.130853 0.0682904 0.0789347 0.0516061 0.0636837 yield of N-waste on food
mu_TX J/mol 468734 462783 236919 275319 175091 218902 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