Dikerogammarus villosus: 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_minf f_max date: 2023/03/16
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.394664 0.473558 0.736779 0.736779 1 1 scaled functional response
r 1/d 0 0 0.0336042 0.0027777 0.0466026 0.00406184 spec pop growth rate
t2 d NaN NaN 20.6268 249.54 14.8736 170.649 population doubling time
a_b d 21.0853 20.5519 19.4168 19.4168 18.7695 18.7695 age at birth
t_j d 395.104 165.587 73.1059 73.1059 53.58 53.58 time since birth at metam
t_p d 395.133 165.596 73.1091 73.1091 53.5823 53.5823 time since birth at puberty
S_b - 0.999779 0.999798 0.999833 0.999833 0.99985 0.99985 survival probability at birth
S_j - 0.997775 0.692438 0.998823 0.381983 0.999075 0.263571 survival probability at metam
S_p - 0.283066 0.0485422 0.992352 0.0266044 0.99653 0.0222079 survival probability at puberty
theta_0b - 0.063268 0.255433 0.479924 0.496277 0.583296 0.58373 frac of ind that is embryo
theta_bj - 0.063257 0.213912 0.249872 0.303387 0.243179 0.301276 frac of ind between b and j
theta_jp - 0.788525 0.440434 0.226208 0.161622 0.139392 0.0902137 frac of ind between j and p
theta_pi - 0.0849496 0.0902213 0.0439961 0.0387144 0.0341321 0.0247801 frac of ind that is adult
L_bi cm 0.0491025 0.0561313 0.0645986 0.0613542 0.0678638 0.0625169 mean structural length of post-natals
L2_bi cm^2 0.00253149 0.00376446 0.00541512 0.00553409 0.00627938 0.00639912 mean squared structural length of post-natals
L3_bi cm^3 0.000137129 0.000304057 0.000602128 0.000769501 0.000818495 0.00118035 mean cubed structural length of post-natals
Ww_bi g 0.000252761 0.000611699 0.00154998 0.00198083 0.00256726 0.00370226 mean wet weight of post-natals
L_pi cm 0.0719853 0.114515 0.160261 0.193478 0.181253 0.239029 mean structural length of adults
L2_pi cm^2 0.00518388 0.013163 0.0264116 0.0387289 0.0343851 0.0616908 mean squared structural length of adults
L3_pi cm^3 0.000373449 0.00151823 0.00447635 0.00797028 0.00684098 0.0169139 mean cubed structural length of adults
Ww_pi g 0.00068835 0.00305436 0.0115229 0.0205169 0.0214572 0.0530514 mean wet weight of adults
R 1/d 0.0619262 0.270847 0.795058 1.28223 1.13811 2.41314 mean reproduction rate of adults
J_X g/d 3.03291e-05 7.19194e-05 0.000199171 0.000208712 0.00033789 0.00035271 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 0.101591 0.0102411 0.112889 0.0135931 yield of living structure on food
Y_VX_d mol/mol 0.0236086 0.0474102 0.000909705 0.0600877 0.000422042 0.0615146 yield of dead structure on food
Y_EX mol/mol 0 0 0.159923 0.0161213 0.241194 0.0290425 yield of living reserve on food
Y_EX_d mol/mol 0.0199074 0.047969 0.00143204 0.0945887 0.00090172 0.13143 yield of dead reserve on food
Y_CX mol/mol 0.847109 0.795246 0.626769 0.709586 0.535218 0.655045 yield of CO2 on food
Y_HX mol/mol 0.61086 0.573461 0.45197 0.511691 0.385952 0.47236 yield of H2O on food
Y_OX mol/mol -0.921231 -0.86483 -0.681612 -0.771675 -0.58205 -0.712361 yield of O2 on food
Y_NX mol/mol 0.127066 0.119287 0.0940154 0.106438 0.0802827 0.0982567 yield of N-waste on food
mu_TX J/mol 449747 422412 332504 376445 282692 346686 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