Euphausia superba: Population traits

at T = 9 °C with background hazards for embryo, juv, adult: 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 std f_minf f_max date: 2025/05/19
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.24404 0.264362 0.632181 0.632181 1 1 scaled functional response
r 1/d 0 0 0.0266701 0.00606406 0.039062 0.00789656 spec pop growth rate
t2 d NaN NaN 25.9897 114.304 17.7448 87.7783 population doubling time
a_b d 4.24195 4.19084 3.7324 3.7324 3.56433 3.56433 age at birth
t_p d 2198.26 1326.35 206.378 206.378 141.735 141.735 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_p - 0.999999 0.542818 1 0.403939 1 0.35457 survival probability at puberty
theta_0b - 0.00305799 0.124608 0.0947025 0.372928 0.129906 0.425391 frac of ind that is embryo
theta_bp - 0.00306082 0.09167 0.0857799 0.231742 0.113089 0.24657 fraction of individuals that is juvenile
theta_pi - 0.993881 0.783722 0.819518 0.39533 0.757004 0.328039 frac of ind that is adult
L_bi cm 0.229755 0.182845 0.166128 0.104501 0.159026 0.099832 mean structural length of post-natals
L2_bi cm^2 0.0540422 0.042251 0.0392611 0.0234595 0.0379889 0.0235594 mean squared structural length of post-natals
L3_bi cm^3 0.0128419 0.0104958 0.0115901 0.00861111 0.0119752 0.0105358 mean cubed structural length of post-natals
Ww_bi g 0.0195325 0.0164195 0.0272324 0.0202329 0.0375408 0.0330285 mean wet weight of post-natals
L_pi cm 0.230355 0.200162 0.179473 0.14381 0.176778 0.145835 mean structural length of adults
L2_pi cm^2 0.0542048 0.0470502 0.0432118 0.0363754 0.0434176 0.0401208 mean squared structural length of adults
L3_pi cm^3 0.0128813 0.0117185 0.0127969 0.0136265 0.0137539 0.0184088 mean cubed structural length of adults
Ww_pi g 0.0195924 0.0183321 0.030068 0.0320173 0.0431167 0.0577091 mean wet weight of adults
R 1/d 0.0912506 0 0.621475 0.483245 0.798337 0.909028 mean reproduction rate of adults
J_X g/d 0.00145584 0.00123298 0.00273982 0.00163712 0.0041935 0.00260066 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.404687 0.404688 0.404688 0.404688 0.404687 0.404688 yield of faeces on food
Y_VX mol/mol 0 0 0.112821 0.0318965 0.111548 0.0319908 yield of living structure on food
Y_VX_d mol/mol 0.0071412 0.0180528 1.94568e-05 0.0591447 7.13346e-06 0.0599115 yield of dead structure on food
Y_EX mol/mol 0 0 0.152266 0.0430483 0.238141 0.0682962 yield of living reserve on food
Y_EX_d mol/mol 0.00372052 0.0101886 2.62593e-05 0.0798232 1.5229e-05 0.127903 yield of dead reserve on food
Y_CX mol/mol 0.584451 0.567071 0.33018 0.3814 0.245601 0.307211 yield of CO2 on food
Y_HX mol/mol 0.421454 0.408921 0.238097 0.275032 0.177105 0.221533 yield of H2O on food
Y_OX mol/mol -0.63559 -0.61669 -0.359071 -0.414772 -0.267091 -0.334092 yield of O2 on food
Y_NX mol/mol 0.0876676 0.0850607 0.049527 0.05721 0.0368401 0.0460816 yield of N-waste on food
mu_TX J/mol 325133 316120 190569 217650 143986 176889 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