Trachurus capensis: Population traits

at T = 11.2 °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: 2025/05/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.507337 0.528905 0.764452 0.764452 1 1 scaled functional response
r 1/d 0 0 0.00242238 0.000419003 0.00332919 0.000588363 spec pop growth rate
t2 d NaN NaN 286.143 1654.28 208.203 1178.09 population doubling time
a_b d 25.6641 25.5058 24.2175 24.2175 23.4206 23.4206 age at birth
t_j d 33.806 32.8442 25.9152 25.9152 22.2802 22.2802 time since birth at metam
t_p d 11338.7 8395.69 3733.58 3733.58 2780.42 2780.42 time since birth at puberty
S_b - 0.999999 0.999999 0.999999 0.999999 0.999999 0.999999 survival probability at birth
S_j - 0.999997 0.284392 0.999998 0.219811 0.999998 0.197461 survival probability at metam
S_p - 0.999996 0.198061 0.999997 0.197662 0.999998 0.18697 survival probability at puberty
theta_0b - 0.00258218 0.461763 0.0569167 0.526733 0.0748871 0.559109 frac of ind that is embryo
theta_bj - 0.00258661 0.263244 0.0537561 0.269273 0.0661505 0.260589 frac of ind between b and j
theta_jp - 0.00082059 0.0317575 0.00365166 0.00759376 0.00325557 0.00513592 frac of ind between j and p
theta_pi - 0.994011 0.243236 0.885676 0.1964 0.855707 0.175166 frac of ind that is adult
L_bi cm 3.45372 0.350754 0.85695 0.21481 0.761974 0.202814 mean structural length of post-natals
L2_bi cm^2 13.3675 0.735669 1.25075 0.232509 1.01488 0.199356 mean squared structural length of post-natals
L3_bi cm^3 54.1372 2.63632 2.47605 0.680598 1.88698 0.585054 mean cubed structural length of post-natals
Ww_bi g 88.553 4.38351 4.84782 1.33254 4.25143 1.31815 mean wet weight of post-natals
L_pi cm 3.46528 0.684137 0.907228 0.410676 0.817089 0.394457 mean structural length of adults
L2_pi cm^2 13.4133 1.62076 1.33138 0.551978 1.09663 0.492675 mean squared structural length of adults
L3_pi cm^3 54.3228 5.83314 2.6365 1.63939 2.03998 1.47184 mean cubed structural length of adults
Ww_pi g 88.8565 9.69898 5.16198 3.20974 4.59615 3.31611 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.179606 0.0102945 0.0253397 0.00469365 0.0269049 0.00526271 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 0.236701 0.0607571 0.233493 0.0654081 yield of living structure on food
Y_VX_d mol/mol 0.0488425 0.0983583 0.000449631 0.133341 0.000209571 0.135795 yield of dead structure on food
Y_EX mol/mol 0 0 0.226733 0.0581986 0.292575 0.0819589 yield of living reserve on food
Y_EX_d mol/mol 0.0310498 0.0651858 0.000430697 0.127725 0.0002626 0.170157 yield of dead reserve on food
Y_CX mol/mol 0.810733 0.727081 0.42631 0.510603 0.364085 0.437306 yield of CO2 on food
Y_HX mol/mol 0.583277 0.523094 0.306707 0.367351 0.261939 0.314617 yield of H2O on food
Y_OX mol/mol -0.881672 -0.790701 -0.463613 -0.555281 -0.395942 -0.47557 yield of O2 on food
Y_NX mol/mol 0.12161 0.109062 0.0639466 0.0765905 0.0546127 0.0655959 yield of N-waste on food
mu_TX J/mol 431001 387469 228985 273193 194588 233235 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