Clarias ngamensis: Population traits

at T = 25 °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_min f_max date: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.260511 NaN 0.260511 0.260511 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.0188406 0.0188406 0.00272055 0.00272055 spec pop growth rate
t2 d NaN NaN NaN NaN 36.7901 36.7901 254.782 254.782 population doubling time
a_b d 5.53137 NaN 5.53137 NaN 5.05481 5.04837 5.05481 5.04837 age at birth
t_j d 0.0971315 NaN 0.0971315 NaN 0.0665447 0.0661995 0.0665447 0.0661995 time since birth at metam
t_p d 1476.01 NaN 1476.01 NaN 369.452 365.724 369.452 365.724 time since birth at puberty
S_b - 1 NaN 1 NaN 1 1 1 1 survival probability at birth
S_j - 1 NaN 0.966414 NaN 1 1 0.966078 0.966075 survival probability at metam
S_p - 1 NaN 0.362844 NaN 1 1 0.279273 0.278198 survival probability at puberty
theta_0b - 0.000917958 NaN 0.311726 NaN 0.0907024 0.0905887 0.483888 0.484954 frac of ind that is embryo
theta_bj - 1.61477e-05 NaN 0.00539092 NaN 0.00113931 0.00113355 0.00622896 0.00621853 frac of ind between b and j
theta_jp - 0.000903418 NaN 0.181432 NaN 0.0814626 0.0813784 0.245253 0.245352 frac of ind between j and p
theta_pi - 0.998162 NaN 0.501451 NaN 0.826696 0.826899 0.264629 0.263476 frac of ind that is adult
L_bi cm 2.04116 NaN 0.753956 NaN 0.514127 0.517303 0.211828 0.211859 mean structural length of post-natals
L2_bi cm^2 4.27711 NaN 1.34686 NaN 0.454684 0.461148 0.18593 0.186983 mean squared structural length of post-natals
L3_bi cm^3 9.04819 NaN 2.74914 NaN 0.569786 0.583255 0.455705 0.464298 mean cubed structural length of post-natals
Ww_bi g 24.0745 NaN 7.31462 NaN 4.20204 4.42517 3.36072 3.52264 mean wet weight of post-natals
L_pi cm 2.04298 NaN 1.00993 NaN 0.557951 0.561376 0.345644 0.346278 mean structural length of adults
L2_pi cm^2 4.28105 NaN 1.84695 NaN 0.499527 0.506574 0.357668 0.36053 mean squared structural length of adults
L3_pi cm^3 9.05653 NaN 3.77325 NaN 0.626671 0.641407 0.888395 0.907236 mean cubed structural length of adults
Ww_pi g 24.0967 NaN 10.0395 NaN 4.62155 4.86638 6.55171 6.88323 mean wet weight of adults
R 1/d 0.568673 NaN 0 NaN 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.307344 NaN 0.0967825 NaN 0.125432 0.131451 0.0512917 0.0532999 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.109375 NaN 0.109375 NaN 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 NaN 0 NaN 0.0855853 0.0835967 0.024171 0.0236988 yield of living structure on food
Y_VX_d mol/mol 0.0054475 NaN 0.0147488 NaN 6.2729e-07 5.9297e-07 0.0473554 0.0464417 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.545586 0.550654 0.154084 0.156105 yield of living reserve on food
Y_EX_d mol/mol 0.00904666 NaN 0.0244932 NaN 3.99883e-06 3.90591e-06 0.30188 0.305913 yield of dead reserve on food
Y_CX mol/mol 0.876131 NaN 0.851383 NaN 0.259449 0.25637 0.363134 0.358466 yield of CO2 on food
Y_HX mol/mol 0.630327 NaN 0.612523 NaN 0.186659 0.184444 0.261255 0.257897 yield of H2O on food
Y_OX mol/mol -0.952792 NaN -0.925879 NaN -0.28215 -0.278802 -0.394909 -0.389832 yield of O2 on food
Y_NX mol/mol 0.13142 NaN 0.127707 NaN 0.0389173 0.0384555 0.0544701 0.05377 yield of N-waste on food
mu_TX J/mol 464801 NaN 451654 NaN 129632 127840 185956 183320 yield of heat on food

Remarks

  • Reprod-code O applies. Sex ratio is assumed to be 1:1. Parameters of male and female differ.
  • Buffer handling rule: release each egg as soon as reproduction buffer allows
  • Weights of adults do not include reproduction buffer