Larus occidentalis: Population traits

at T = 40.9 °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_min f_max date: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.968103 NaN 0.970882 0.970882 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00262598 0.00262598 0.000641454 0.000641454 spec pop growth rate
t2 d NaN NaN NaN NaN 263.958 263.958 1080.59 1080.59 population doubling time
a_b d 18.1916 NaN 18.1874 NaN 18.1452 18.0964 18.1452 18.0964 age at birth
t_p d 287.009 NaN 217.36 NaN 127.975 101.463 127.975 101.463 time since birth at puberty
S_b - 1 NaN 1 NaN 1 1 1 1 survival probability at birth
S_p - 1 NaN 0.468759 NaN 1 1 0.460787 0.45171 survival probability at puberty
theta_0b - 0.00139998 NaN 0.007408 NaN 0.0465421 0.0464199 0.0589072 0.0623615 frac of ind that is embryo
theta_bp - 0.00139966 NaN 0.00493558 NaN 0.0443666 0.0442558 0.0384969 0.0403624 fraction of individuals that is juvenile
theta_pi - 0.9972 NaN 0.987656 NaN 0.909091 0.909324 0.902596 0.897276 frac of ind that is adult
L_bi cm 3.98776 NaN 3.98958 NaN 3.88323 4.00901 3.98043 4.1099 mean structural length of post-natals
L2_bi cm^2 15.9105 NaN 15.941 NaN 15.327 16.3575 16.0484 17.1367 mean squared structural length of post-natals
L3_bi cm^3 63.5004 NaN 63.7504 NaN 61.1375 67.4974 65.1904 72.0448 mean cubed structural length of post-natals
Ww_bi g 745.101 NaN 749.999 NaN 738.997 842.73 787.987 899.506 mean wet weight of post-natals
L_pi cm 3.99033 NaN 3.99897 NaN 3.9668 4.09775 4.05977 4.19887 mean structural length of adults
L2_pi cm^2 15.9262 NaN 15.9981 NaN 15.8422 16.9182 16.5388 17.7004 mean squared structural length of adults
L3_pi cm^3 63.5749 NaN 64.0203 NaN 63.6041 70.2553 67.549 74.8323 mean cubed structural length of adults
Ww_pi g 745.975 NaN 753.174 NaN 768.813 877.163 816.495 934.309 mean wet weight of adults
R 1/d 0 NaN 0.000485871 NaN 0.000187151 0.00812605 0.00485744 0.0134222 mean reproduction rate of adults
J_X g/d 71.7299 NaN 72.0738 NaN 71.376 78.9087 74.7358 82.6677 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 0.00224929 0.00224622 0.000559527 0.000559027 yield of living structure on food
Y_VX_d mol/mol 6.84912e-05 NaN 0.000146287 NaN 4.84807e-08 4.64583e-08 0.000644323 0.000659231 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.024939 0.0257987 0.00620373 0.00642063 yield of living reserve on food
Y_EX_d mol/mol 0.000735171 NaN 0.00157473 NaN 5.37527e-07 5.33591e-07 0.00714391 0.00757151 yield of dead reserve on food
Y_CX mol/mol 0.72298 NaN 0.722234 NaN 0.701542 0.700846 0.71181 0.711274 yield of CO2 on food
Y_HX mol/mol 0.769695 NaN 0.768902 NaN 0.746872 0.746131 0.757804 0.757234 yield of H2O on food
Y_OX mol/mol -0.917628 NaN -0.916682 NaN -0.890419 -0.889535 -0.903451 -0.902771 yield of O2 on food
Y_NX mol/mol 0.166842 NaN 0.166669 NaN 0.161894 0.161734 0.164264 0.16414 yield of N-waste on food
mu_TX J/mol 463920 NaN 463427 NaN 449758 449295 456541 456185 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