Gammarus roeselii: 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: 2025/05/19
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.50586 0.50586 0.94243 0.94243 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.0159055 0.0159055 0.000171912 0.000171912 spec pop growth rate
t2 d NaN NaN NaN NaN 43.579 43.579 4031.99 4031.99 population doubling time
a_b d 36.7397 36.4228 33.4423 33.1837 33.1638 32.9115 33.1638 32.9115 age at birth
t_j d 509.633 422.915 149.223 139.855 139.171 130.908 139.171 130.908 time since birth at metam
t_p d 711.539 576.959 189.966 177.633 176.736 165.909 176.736 165.909 time since birth at puberty
S_b - 0.999313 0.999367 0.999485 0.999524 0.999498 0.999535 0.999498 0.999535 survival probability at birth
S_j - 0.994405 0.994957 0.4379 0.414125 0.996839 0.99713 0.412255 0.389904 survival probability at metam
S_p - 0.456103 0.654123 0.0248236 0.0241398 0.97826 0.982232 0.0240589 0.0234519 survival probability at puberty
theta_0b - 0.0692713 0.0637658 0.437782 0.45359 0.412215 0.409623 0.458229 0.473046 frac of ind that is embryo
theta_bj - 0.0691671 0.0636819 0.29819 0.301622 0.243005 0.242472 0.302514 0.304995 frac of ind between b and j
theta_jp - 0.684118 0.578975 0.218506 0.200343 0.282818 0.276506 0.197665 0.1814 frac of ind between j and p
theta_pi - 0.177444 0.293577 0.0455222 0.0444448 0.0619625 0.0713988 0.0415919 0.0405588 frac of ind that is adult
L_bi cm 0.0710081 0.0836899 0.0710729 0.0722243 0.077985 0.0818467 0.0711854 0.0722418 mean structural length of post-natals
L2_bi cm^2 0.00566357 0.00801999 0.00781906 0.00835383 0.00829851 0.00935906 0.00802074 0.00854186 mean squared structural length of post-natals
L3_bi cm^3 0.000500019 0.000850138 0.0013779 0.00158794 0.00121161 0.00147929 0.00149201 0.00171073 mean cubed structural length of post-natals
Ww_bi g 0.00071544 0.00123711 0.00248385 0.00293457 0.00224351 0.00281041 0.00276271 0.00325011 mean wet weight of post-natals
L_pi cm 0.112454 0.124605 0.231052 0.242278 0.193723 0.200399 0.240752 0.251846 mean structural length of adults
L2_pi cm^2 0.012684 0.015598 0.0560896 0.0621008 0.0391172 0.042077 0.0613854 0.0676817 mean squared structural length of adults
L3_pi cm^3 0.00143483 0.00196109 0.0141769 0.0166539 0.00823833 0.0092614 0.0163966 0.0191548 mean cubed structural length of adults
Ww_pi g 0.002053 0.00285376 0.0255558 0.030777 0.0152547 0.0175951 0.0303611 0.0363909 mean wet weight of adults
R 1/d 0.0561879 0.0814078 0.622404 0.721369 0.417115 0.465752 0.713192 0.820843 mean reproduction rate of adults
J_X g/d 3.23373e-05 5.48147e-05 0.00010784 0.000124702 0.000122656 0.00015178 0.000118983 0.000136908 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 0.157117 0.155019 0.00215572 0.00214813 yield of living structure on food
Y_VX_d mol/mol 0.0574572 0.0538555 0.112667 0.110538 0.00465021 0.00434706 0.112924 0.110679 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.133812 0.139492 0.00183596 0.00193296 yield of living reserve on food
Y_EX_d mol/mol 0.024754 0.0245145 0.0904311 0.09374 0.00396044 0.00391163 0.0961736 0.0995929 yield of dead reserve on food
Y_CX mol/mol 0.808414 0.812255 0.687527 0.686347 0.591086 0.587855 0.677536 0.676272 yield of CO2 on food
Y_HX mol/mol 0.582956 0.585726 0.495783 0.494932 0.426239 0.423909 0.488579 0.487667 yield of H2O on food
Y_OX mol/mol -0.87915 -0.883327 -0.747685 -0.746402 -0.642806 -0.639292 -0.73682 -0.735446 yield of O2 on food
Y_NX mol/mol 0.121262 0.121838 0.103129 0.102952 0.0886629 0.0881783 0.10163 0.101441 yield of N-waste on food
mu_TX J/mol 430157 432089 366429 365674 315842 313945 361055 360247 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