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: 2025/02/12
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.358074 0.358074 0.391729 0.391729 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.0177044 0.0177044 0.00406422 0.00406422 spec pop growth rate
t2 d NaN NaN NaN NaN 39.1512 39.1512 170.549 170.549 population doubling time
a_b d 18.6885 17.5023 18.4138 17.2463 15.8219 14.9161 15.8219 14.9161 age at birth
t_j d 54.539 31.2796 47.3101 28.1417 16.3562 11.8538 16.3562 11.8538 time since birth at metam
t_p d 594.717 189.391 414.67 160.776 77.5827 52.9958 77.5827 52.9958 time since birth at puberty
S_b - 0.999986 0.999992 0.999986 0.999992 0.999991 0.999995 0.999991 0.999995 survival probability at birth
S_j - 0.999894 0.999946 0.850585 0.658351 0.999949 0.999979 0.439884 0.402051 survival probability at metam
S_p - 0.999366 0.999877 0.659688 0.505545 0.999947 0.999973 0.427854 0.346179 survival probability at puberty
theta_0b - 0.0206911 0.0160576 0.0455087 0.0850583 0.244327 0.23208 0.334386 0.411576 frac of ind that is embryo
theta_bj - 0.0207208 0.0160756 0.0420763 0.0695938 0.184746 0.145431 0.214937 0.204105 frac of ind between b and j
theta_jp - 0.039738 0.0126535 0.0537171 0.0311245 0.00537955 0.0328665 0.00444552 0.0289709 frac of ind between j and p
theta_pi - 0.91885 0.955213 0.858698 0.814223 0.565547 0.589623 0.446232 0.355349 frac of ind that is adult
L_bi cm 0.0548744 0.0882999 0.0600992 0.0898401 0.0846547 0.107481 0.0908477 0.103828 mean structural length of post-natals
L2_bi cm^2 0.00302298 0.00791983 0.00365107 0.00847845 0.00821083 0.0141042 0.0102858 0.0152728 mean squared structural length of post-natals
L3_bi cm^3 0.000167093 0.000717801 0.000223757 0.000825313 0.00089641 0.00216805 0.00137788 0.0028982 mean cubed structural length of post-natals
Ww_bi g 0.000200721 0.000932814 0.000273021 0.00109577 0.00140022 0.00398171 0.00215231 0.00532267 mean wet weight of post-natals
L_pi cm 0.0555585 0.0895291 0.0617721 0.095105 0.0964742 0.124138 0.11153 0.138521 mean structural length of adults
L2_pi cm^2 0.00309161 0.00809012 0.00383106 0.00924956 0.010142 0.0175289 0.0141651 0.0235684 mean squared structural length of adults
L3_pi cm^3 0.000172282 0.000736145 0.000238434 0.000914163 0.00115618 0.00277855 0.0019971 0.00470932 mean cubed structural length of adults
Ww_pi g 0.000206954 0.000956653 0.000290929 0.00121373 0.00180599 0.00510291 0.00311954 0.00864886 mean wet weight of adults
R 1/d 0.0055013 0.0366188 0.00936938 0.0467188 0.0771583 0.173486 0.11438 0.249548 mean reproduction rate of adults
J_X g/d 1.00047e-05 4.34454e-05 1.36291e-05 5.15142e-05 8.99021e-05 0.00023583 0.000112493 0.000254419 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 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 0 0 0 0.176529 0.162761 0.0497813 0.0462973 yield of living structure on food
Y_VX_d mol/mol 0.0206546 0.0177835 0.0340882 0.0367459 0.000339302 0.000209389 0.0820719 0.0817996 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.099216 0.136156 0.0279789 0.0387296 yield of living reserve on food
Y_EX_d mol/mol 0.00415676 0.00532694 0.00750508 0.0120415 0.0001907 0.000175162 0.0461274 0.0684287 yield of dead reserve on food
Y_CX mol/mol 0.865814 0.867515 0.849032 0.841838 0.61435 0.591324 0.684666 0.65537 yield of CO2 on food
Y_HX mol/mol 0.624348 0.625574 0.612246 0.607058 0.443014 0.42641 0.49372 0.472594 yield of H2O on food
Y_OX mol/mol -0.941572 -0.943422 -0.923322 -0.915498 -0.668105 -0.643065 -0.744574 -0.712715 yield of O2 on food
Y_NX mol/mol 0.129872 0.130127 0.127355 0.126276 0.0921524 0.0886986 0.1027 0.0983055 yield of N-waste on food
mu_TX J/mol 459886 460678 451328 447504 329392 316033 365815 349515 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