Gammarus minus: Population traits

at T = 13 °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 - 0.358084 NaN 0.391623 0.391623 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.0201741 0.0201741 0.00452006 0.00452006 spec pop growth rate
t2 d NaN NaN NaN NaN 34.3582 34.3582 153.349 153.349 population doubling time
a_b d 18.6885 NaN 18.4146 NaN 15.8219 14.9161 15.8219 14.9161 age at birth
t_j d 54.5363 NaN 47.3294 NaN 16.3562 11.8538 16.3562 11.8538 time since birth at metam
t_p d 594.635 NaN 415.061 NaN 77.5827 52.9958 77.5827 52.9958 time since birth at puberty
S_b - 0.999986 NaN 0.999986 NaN 0.999991 0.999995 0.999991 0.999995 survival probability at birth
S_j - 0.999894 NaN 0.850722 NaN 0.999949 0.999979 0.439884 0.402051 survival probability at metam
S_p - 0.999366 NaN 0.659861 NaN 0.999947 0.999973 0.427854 0.346179 survival probability at puberty
theta_0b - 0.0206908 NaN 0.0454834 NaN 0.273253 0.259834 0.344205 0.41993 frac of ind that is embryo
theta_bj - 0.0207206 NaN 0.0420563 NaN 0.198697 0.157476 0.219766 0.207061 frac of ind between b and j
theta_jp - 0.0397349 NaN 0.0537305 NaN 0.00566459 0.0349213 0.00452609 0.0292789 frac of ind between j and p
theta_pi - 0.918854 NaN 0.85873 NaN 0.522385 0.547769 0.431503 0.34373 frac of ind that is adult
L_bi cm 0.0548765 NaN 0.0600814 NaN 0.0807381 0.101328 0.0884708 0.100673 mean structural length of post-natals
L2_bi cm^2 0.00302321 NaN 0.00364884 NaN 0.00743375 0.0124825 0.00973155 0.0142737 mean squared structural length of post-natals
L3_bi cm^3 0.000167112 NaN 0.000223548 NaN 0.000770827 0.00180731 0.00127138 0.00262547 mean cubed structural length of post-natals
Ww_bi g 0.000200745 NaN 0.000272752 NaN 0.00120406 0.0033192 0.00198594 0.00482179 mean wet weight of post-natals
L_pi cm 0.0555607 NaN 0.0617524 NaN 0.0929785 0.118536 0.109106 0.134878 mean structural length of adults
L2_pi cm^2 0.00309184 NaN 0.00382859 NaN 0.00937889 0.015893 0.0135454 0.0222837 mean squared structural length of adults
L3_pi cm^3 0.000172302 NaN 0.000238201 NaN 0.00102412 0.0023899 0.00187073 0.00433658 mean cubed structural length of adults
Ww_pi g 0.000206979 NaN 0.000290631 NaN 0.00159972 0.00438916 0.00292215 0.0079643 mean wet weight of adults
R 1/d 0.00550246 NaN 0.00935592 NaN 0.0704668 0.154974 0.108689 0.23396 mean reproduction rate of adults
J_X g/d 1.00059e-05 NaN 1.3616e-05 NaN 8.12095e-05 0.000208459 0.000106322 0.000237578 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 0.191489 0.174906 0.0540501 0.0499511 yield of living structure on food
Y_VX_d mol/mol 0.0206546 NaN 0.0340805 NaN 0.000262733 0.000160196 0.0865551 0.0863888 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.107624 0.146316 0.0303782 0.0417862 yield of living reserve on food
Y_EX_d mol/mol 0.00415687 NaN 0.00750135 NaN 0.000147666 0.000134011 0.0486471 0.0722677 yield of dead reserve on food
Y_CX mol/mol 0.865814 NaN 0.849043 NaN 0.591101 0.569108 0.670994 0.640231 yield of CO2 on food
Y_HX mol/mol 0.624348 NaN 0.612254 NaN 0.426249 0.41039 0.483862 0.461678 yield of H2O on food
Y_OX mol/mol -0.941572 NaN -0.923334 NaN -0.642822 -0.618905 -0.729707 -0.696251 yield of O2 on food
Y_NX mol/mol 0.129872 NaN 0.127356 NaN 0.0886651 0.0853662 0.100649 0.0960347 yield of N-waste on food
mu_TX J/mol 459886 NaN 451334 NaN 317349 304419 358733 341600 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