Clarias batrachus: 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_minf f_max date: 2025/06/20
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.510847 0.520662 0.760331 0.760331 1 1 scaled functional response
r 1/d 0 0 0.00794515 0.000826709 0.0106415 0.00109711 spec pop growth rate
t2 d NaN NaN 87.2416 838.442 65.1365 631.795 population doubling time
a_b d 5.45501 5.4415 5.19843 5.19843 5.0524 5.0524 age at birth
t_j d 0.0264563 0.0261653 0.0214056 0.0214056 0.0189376 0.0189376 time since birth at metam
t_p d 2103.66 1791.96 752.044 752.044 572.402 572.402 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.992578 1 0.99255 1 0.992536 survival probability at metam
S_p - 1 0.434795 1 0.387699 1 0.359676 survival probability at puberty
theta_0b - 0.000872891 0.278877 0.0404067 0.370913 0.0522789 0.399958 frac of ind that is embryo
theta_bj - 4.24002e-06 0.00133807 0.000163188 0.00152053 0.000190971 0.00149144 frac of ind between b and j
theta_jp - 0.000870009 0.182459 0.0386636 0.228394 0.049418 0.237035 frac of ind between j and p
theta_pi - 0.998253 0.537326 0.920767 0.399172 0.898112 0.361516 frac of ind that is adult
L_bi cm 3.11745 0.981461 0.99732 0.42663 0.911511 0.387561 mean structural length of post-natals
L2_bi cm^2 10.0519 2.62766 1.57447 0.796601 1.3685 0.706292 mean squared structural length of post-natals
L3_bi cm^3 32.8139 8.34399 3.21257 2.73616 2.75776 2.73975 mean cubed structural length of post-natals
Ww_bi g 60.8643 15.6137 7.29995 6.21739 7.37248 7.32435 mean wet weight of post-natals
L_pi cm 3.12009 1.28497 1.03515 0.61666 0.956198 0.578347 mean structural length of adults
L2_pi cm^2 10.0607 3.5234 1.64043 1.24994 1.4435 1.16577 mean squared structural length of adults
L3_pi cm^3 32.8427 11.1978 3.34799 4.31158 2.91002 4.54675 mean cubed structural length of adults
Ww_pi g 60.9176 20.954 7.60768 9.79723 7.77954 12.1551 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.587585 0.156552 0.136985 0.0693075 0.156597 0.0808209 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 0.186329 0.0326372 0.187401 0.0371909 yield of living structure on food
Y_VX_d mol/mol 0.0102859 0.0271427 1.55195e-05 0.066461 7.39595e-06 0.0742202 yield of dead structure on food
Y_EX mol/mol 0 0 0.237068 0.0415246 0.31359 0.0622338 yield of living reserve on food
Y_EX_d mol/mol 0.0087927 0.0236482 1.97456e-05 0.0845589 1.23761e-05 0.124197 yield of dead reserve on food
Y_CX mol/mol 0.871546 0.839834 0.467193 0.665443 0.389613 0.592783 yield of CO2 on food
Y_HX mol/mol 0.627029 0.604214 0.336119 0.478749 0.280305 0.426474 yield of H2O on food
Y_OX mol/mol -0.947807 -0.91332 -0.508072 -0.72367 -0.423704 -0.644651 yield of O2 on food
Y_NX mol/mol 0.130732 0.125975 0.0700789 0.0998165 0.058442 0.0889174 yield of N-waste on food
mu_TX J/mol 462521 445922 248930 353605 206314 314257 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