Piaractus brachypomus: Population traits

at T = 27 °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: 2023/11/01
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.400831 0.465186 0.732593 0.732593 1 1 scaled functional response
r 1/d 0 0 0.00974814 0.000187017 0.0125469 0.000248606 spec pop growth rate
t2 d NaN NaN 71.1056 3706.34 55.2443 2788.14 population doubling time
a_b d 2.00461 1.96425 1.85785 1.85785 1.79909 1.79909 age at birth
t_j d 1.28259 1.17102 0.917908 0.917908 0.800432 0.800432 time since birth at metam
t_p d 2431.87 1325.23 700.244 700.244 546.324 546.324 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.404163 1 0.40398 1 0.403899 survival probability at metam
S_p - 1 0.278606 1 0.235693 1 0.213062 survival probability at puberty
theta_0b - 0.000176646 0.436296 0.0178534 0.497315 0.0222067 0.525925 frac of ind that is embryo
theta_bj - 0.000113655 0.172023 0.00874896 0.162408 0.00977082 0.154619 frac of ind between b and j
theta_jp - 6.39801e-05 0.0594499 0.00887823 0.0780218 0.0120538 0.0860428 frac of ind between j and p
theta_pi - 0.999646 0.332231 0.964519 0.262255 0.955969 0.233413 frac of ind that is adult
L_bi cm 9.81353 0.995695 2.1803 0.530368 2.02541 0.460151 mean structural length of post-natals
L2_bi cm^2 98.9019 9.06337 8.37472 4.96331 7.45174 4.64308 mean squared structural length of post-natals
L3_bi cm^3 1006.04 102.833 43.8072 79.6672 38.3865 94.8874 mean cubed structural length of post-natals
Ww_bi g 1691.93 184.199 98.3937 178.938 103.678 256.281 mean wet weight of post-natals
L_pi cm 9.81526 1.64446 2.21884 0.955376 2.06996 0.864289 mean structural length of adults
L2_pi cm^2 98.9194 15.3751 8.52768 9.50935 7.62173 9.42538 mean squared structural length of adults
L3_pi cm^3 1006.22 174.48 44.6078 152.704 39.2629 192.721 mean cubed structural length of adults
Ww_pi g 1692.23 312.533 100.192 342.983 106.045 520.519 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 11.8656 1.26201 1.83676 1.08853 2.23103 1.39008 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 0.232496 0.0136874 0.215879 0.01697 yield of living structure on food
Y_VX_d mol/mol 0.00834028 0.0225152 2.17795e-06 0.0355914 1.09975e-06 0.0396503 yield of dead structure on food
Y_EX mol/mol 0 0 0.289704 0.0170554 0.367188 0.0288642 yield of living reserve on food
Y_EX_d mol/mol 0.00568616 0.0178148 2.71386e-06 0.0443491 1.87055e-06 0.067441 yield of dead reserve on food
Y_CX mol/mol 0.876599 0.850295 0.36842 0.779942 0.307554 0.737699 yield of CO2 on food
Y_HX mol/mol 0.630664 0.61174 0.265058 0.561125 0.221268 0.530734 yield of H2O on food
Y_OX mol/mol -0.953301 -0.924696 -0.400657 -0.848187 -0.334465 -0.802248 yield of O2 on food
Y_NX mol/mol 0.13149 0.127544 0.0552631 0.116991 0.0461332 0.110655 yield of N-waste on food
mu_TX J/mol 465202 451444 196912 414088 162605 391222 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