Zalophus wollebaeki: Population traits

at T = 37 °C with background hazards for embryo, baby, 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 stx f_min f_max date: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.968695 NaN 0.985134 0.985134 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000720778 0.000720778 0.000102609 0.000102609 spec pop growth rate
t2 d NaN NaN NaN NaN 961.665 961.665 6755.2 6755.2 population doubling time
a_b d 108.175 NaN 108.175 NaN 108.175 108.175 108.175 108.175 age at birth
t_x d 2833.59 NaN 1775.05 NaN 1520.25 1201.75 1520.25 1201.75 time since birth at weaning
t_p d 359.766 NaN 353.086 NaN 347.428 332.002 347.428 332.002 time since birth at puberty
S_b - 1 NaN 1 NaN 1 1 1 1 survival probability at birth
S_x - 1 NaN 0.445958 NaN 1 1 0.442821 0.433777 survival probability at weaning
S_p - 0.999277 NaN 0.088143 NaN 0.999934 0.999973 0.0878506 0.0863339 survival probability at puberty
theta_0b - 0.0105408 NaN 0.0984636 NaN 0.075173 0.075151 0.144076 0.150911 frac of ind that is embryo
theta_bx - 0.0105402 NaN 0.0647495 NaN 0.0695304 0.0695096 0.0934425 0.0968876 fraction of individuals that is baby
theta_xp - 0.265513 NaN 0.205472 NaN 0.547561 0.467462 0.247448 0.213922 fraction of individuals that is juvenile
theta_pi - 0.713406 NaN 0.631315 NaN 0.307736 0.387877 0.515034 0.53828 frac of ind that is adult
L_bi cm 34.337 NaN 32.5335 NaN 29.9398 30.9963 31.2218 32.2829 mean structural length of post-natals
L2_bi cm^2 1191.96 NaN 1108.85 NaN 951.681 1024.11 1044.99 1124.8 mean squared structural length of post-natals
L3_bi cm^3 41625.4 NaN 38659.2 NaN 31383.3 35173.3 36236.4 40709.3 mean cubed structural length of post-natals
Ww_bi g 228022 NaN 214711 NaN 176458 205188 203745 237483 mean wet weight of post-natals
L_pi cm 35.4749 NaN 36.0458 NaN 36.3486 37.6547 36.5334 38.0854 mean structural length of adults
L2_pi cm^2 1258.47 NaN 1299.31 NaN 1321.31 1418.36 1334.73 1450.73 mean squared structural length of adults
L3_pi cm^3 44644.1 NaN 46835.5 NaN 48034.6 53444.2 48765.4 55268.3 mean cubed structural length of adults
Ww_pi g 244559 NaN 260122 NaN 270082 311774 274192 322414 mean wet weight of adults
R 1/d 0.000136418 NaN 0.00144157 NaN 0.00217112 0.00491364 0.00257118 0.00588625 mean reproduction rate of adults
J_X g/d 2042.62 NaN 1932.43 NaN 1683.56 1894.37 1848.64 2080.62 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 0.013436 0.0133829 0.00201132 0.00200765 yield of living structure on food
Y_VX_d mol/mol 0.00215287 NaN 0.00505654 NaN 4.85273e-05 4.23924e-05 0.00590277 0.00582208 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.0621104 0.064688 0.00929766 0.00970424 yield of living reserve on food
Y_EX_d mol/mol 0.00964047 NaN 0.0230272 NaN 0.000224325 0.000204909 0.0272866 0.0281418 yield of dead reserve on food
Y_CX mol/mol 0.812919 NaN 0.797851 NaN 0.753695 0.751384 0.782667 0.781578 yield of CO2 on food
Y_HX mol/mol 0.693301 NaN 0.680449 NaN 0.642791 0.64082 0.6675 0.666571 yield of H2O on food
Y_OX mol/mol -0.955729 NaN -0.938014 NaN -0.886101 -0.883384 -0.920163 -0.918882 yield of O2 on food
Y_NX mol/mol 0.0659124 NaN 0.0646906 NaN 0.0611104 0.060923 0.0634595 0.0633712 yield of N-waste on food
mu_TX J/mol 458080 NaN 449415 NaN 424018 422664 440680 440039 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