Trachurus trachurus: Population traits

at T = 15 °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: 2025/05/19
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.271604 0.271604 0.635802 0.635802 1 1 scaled functional response
r 1/d 0 0 0.0104997 0.0012853 0.0160116 0.00179164 spec pop growth rate
t2 d NaN NaN 66.0159 539.289 43.2904 386.88 population doubling time
a_b d 10.6301 10.6301 9.27455 9.27455 8.70062 8.70062 age at birth
t_j d 34.2205 34.2205 17.3891 17.3891 12.9655 12.9655 time since birth at metam
t_p d 3347.51 3347.51 680.851 680.851 460.189 460.189 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.496825 1 0.297487 1 0.216773 survival probability at metam
S_p - 1 0.1052 1 0.102989 1 0.102453 survival probability at puberty
theta_0b - 0.000672186 0.299501 0.0926671 0.507439 0.129899 0.567471 frac of ind that is embryo
theta_bj - 0.000673546 0.215872 0.0841904 0.291332 0.11315 0.287142 frac of ind between b and j
theta_jp - 0.00149474 0.168015 0.0672279 0.0797405 0.049965 0.0413673 frac of ind between j and p
theta_pi - 0.99716 0.316612 0.755915 0.121489 0.706986 0.10402 frac of ind that is adult
L_bi cm 2.33637 0.738551 0.612891 0.204791 0.566191 0.197476 mean structural length of post-natals
L2_bi cm^2 5.57551 1.5005 0.643825 0.204228 0.566266 0.198485 mean squared structural length of post-natals
L3_bi cm^3 13.4056 3.50209 0.930525 0.559061 0.805973 0.639906 mean cubed structural length of post-natals
Ww_bi g 16.53 4.31831 1.43821 0.864079 1.49759 1.18902 mean wet weight of post-natals
L_pi cm 2.34122 1.52238 0.714693 0.548539 0.672674 0.529549 mean structural length of adults
L2_pi cm^2 5.5876 3.3091 0.77049 0.800894 0.694265 0.797233 mean squared structural length of adults
L3_pi cm^3 13.4347 7.74725 1.11666 2.2639 0.991622 2.65798 mean cubed structural length of adults
Ww_pi g 16.5659 9.55287 1.72589 3.49906 1.84254 4.93882 mean wet weight of adults
R 1/d 0.422179 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.108483 0.0291642 0.0295116 0.00926613 0.0408874 0.0141822 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 0.331065 0.077547 0.31562 0.080839 yield of living structure on food
Y_VX_d mol/mol 0.00851673 0.0239865 1.15704e-06 0.156247 4.20652e-07 0.162662 yield of dead structure on food
Y_EX mol/mol 0 0 0.180625 0.0423088 0.270837 0.0693689 yield of living reserve on food
Y_EX_d mol/mol 0.00198497 0.00559047 6.31271e-07 0.0852466 3.60967e-07 0.139582 yield of dead reserve on food
Y_CX mol/mol 0.880123 0.861048 0.378933 0.529276 0.304167 0.438173 yield of CO2 on food
Y_HX mol/mol 0.6332 0.619476 0.272621 0.380785 0.218831 0.315241 yield of H2O on food
Y_OX mol/mol -0.957134 -0.93639 -0.41209 -0.575587 -0.330781 -0.476513 yield of O2 on food
Y_NX mol/mol 0.132018 0.129157 0.0568399 0.0793914 0.045625 0.065726 yield of N-waste on food
mu_TX J/mol 467150 457432 207623 285448 165729 235827 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