Oreochromis niloticus: Population traits

at T = 28 °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: 2025/06/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.191631 0.221785 0.610892 0.610892 1 1 scaled functional response
r 1/d 0 0 0.0168748 0.000814689 0.0188321 0.000840909 spec pop growth rate
t2 d NaN NaN 41.0759 850.812 36.8067 824.283 population doubling time
a_b d 6.65079 6.56636 6.17742 6.17742 6.07848 6.07848 age at birth
t_p d 1548.35 486.236 185.256 185.256 159.198 159.198 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_p - 1 0.357653 1 0.291565 1 0.275743 survival probability at puberty
theta_0b - 0.00187205 0.204272 0.0989311 0.438077 0.108094 0.466908 frac of ind that is embryo
theta_bp - 0.00187356 0.121753 0.0892003 0.235146 0.0964704 0.243891 fraction of individuals that is juvenile
theta_pi - 0.996254 0.673974 0.811869 0.326777 0.795436 0.2892 frac of ind that is adult
L_bi cm 1.29116 1.04149 0.807282 0.665656 0.833792 0.610029 mean structural length of post-natals
L2_bi cm^2 1.69146 1.45834 1.00396 1.51452 1.12654 1.70549 mean squared structural length of post-natals
L3_bi cm^3 2.22857 2.17175 1.6239 5.14656 2.06749 8.49431 mean cubed structural length of post-natals
Ww_bi g 6.47793 6.96439 11.4947 36.4299 22.6395 93.0144 mean wet weight of post-natals
L_pi cm 1.29333 1.20596 0.879948 1.04554 0.916894 1.00677 mean structural length of adults
L2_pi cm^2 1.6946 1.71862 1.11186 2.59026 1.2604 3.12678 mean squared structural length of adults
L3_pi cm^3 2.23276 2.56365 1.80194 8.84791 2.3178 15.6553 mean cubed structural length of adults
Ww_pi g 6.4901 8.22111 12.755 62.6299 25.3804 171.428 mean wet weight of adults
R 1/d 0 0.0260544 0 0.362895 0.021464 0.483122 mean reproduction rate of adults
J_X g/d 0.220909 0.220433 0.417992 0.630559 0.767771 1.16235 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 0.0655583 0.00664941 0.0507119 0.00614526 yield of living structure on food
Y_VX_d mol/mol 0.00303009 0.00821435 1.94738e-06 0.014794 1.10963e-06 0.0135646 yield of dead structure on food
Y_EX mol/mol 0 0 0.398496 0.0404185 0.504594 0.0611466 yield of living reserve on food
Y_EX_d mol/mol 0.00577767 0.0181274 1.18372e-05 0.0899252 1.1041e-05 0.134971 yield of dead reserve on food
Y_CX mol/mol 0.881817 0.864283 0.426556 0.738838 0.335307 0.674798 yield of CO2 on food
Y_HX mol/mol 0.634419 0.621804 0.306884 0.531553 0.241235 0.48548 yield of H2O on food
Y_OX mol/mol -0.958976 -0.939908 -0.46388 -0.803486 -0.364647 -0.733843 yield of O2 on food
Y_NX mol/mol 0.132273 0.129642 0.0639835 0.110826 0.0502961 0.10122 yield of N-waste on food
mu_TX J/mol 467807 458423 220540 390089 169611 354781 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