Donax trunculus: Population traits

at T = 15 °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: 2025/05/22
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.241789 0.248482 0.624241 0.624241 1 1 scaled functional response
r 1/d 0 0 0.0139388 0.00243036 0.0219409 0.00359633 spec pop growth rate
t2 d NaN NaN 49.728 285.204 31.5915 192.738 population doubling time
a_b d 3.86611 3.84838 3.29976 3.29976 3.0655 3.0655 age at birth
t_j d 0.371008 0.361898 0.165237 0.165237 0.116811 0.116811 time since birth at metam
t_p d 2658.94 2276.66 461.329 461.329 297.283 297.283 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.95502 1 0.95429 1 0.954124 survival probability at metam
S_p - 1 0.725484 1 0.568913 1 0.490733 survival probability at puberty
theta_0b - 0.00108015 0.115681 0.0448446 0.252646 0.064907 0.312441 frac of ind that is embryo
theta_bj - 0.000104013 0.0106683 0.0021975 0.0123404 0.00239356 0.0115918 frac of ind between b and j
theta_jp - 0.000979859 0.0875205 0.0407418 0.175869 0.0584334 0.203913 frac of ind between j and p
theta_pi - 0.997836 0.78613 0.912216 0.559145 0.874266 0.472054 frac of ind that is adult
L_bi cm 0.28725 0.0974983 0.0985362 0.0502954 0.0937262 0.048791 mean structural length of post-natals
L2_bi cm^2 0.0882587 0.0224027 0.0156145 0.00772975 0.0144904 0.0075716 mean squared structural length of post-natals
L3_bi cm^3 0.0278577 0.00660959 0.00337376 0.00265581 0.00315175 0.00295333 mean cubed structural length of post-natals
Ww_bi g 0.0316565 0.00753586 0.00456154 0.00359084 0.00492931 0.00461898 mean wet weight of post-natals
L_pi cm 0.287546 0.107834 0.102429 0.0619585 0.0990986 0.063667 mean structural length of adults
L2_pi cm^2 0.0883543 0.0251737 0.0163376 0.0102487 0.0154795 0.0109071 mean squared structural length of adults
L3_pi cm^3 0.0278879 0.00743473 0.00353238 0.00354845 0.00337071 0.0042996 mean cubed structural length of adults
Ww_pi g 0.0316909 0.00847664 0.004776 0.00479774 0.00527176 0.00672454 mean wet weight of adults
R 1/d 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 0.000281425 7.34124e-05 0.000128577 6.36504e-05 0.000191158 9.98842e-05 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 0.365742 0.101407 0.361755 0.106335 yield of living structure on food
Y_VX_d mol/mol 0.0373492 0.0858314 7.78054e-05 0.197303 2.7697e-05 0.20614 yield of dead structure on food
Y_EX mol/mol 0 0 0.128765 0.0357018 0.204027 0.0599717 yield of living reserve on food
Y_EX_d mol/mol 0.00509318 0.0120285 2.73926e-05 0.0694636 1.56209e-05 0.116261 yield of dead reserve on food
Y_CX mol/mol 0.848183 0.792765 0.396013 0.48675 0.3248 0.401917 yield of CO2 on food
Y_HX mol/mol 0.615404 0.575195 0.28733 0.353164 0.23566 0.291613 yield of H2O on food
Y_OX mol/mol -0.922399 -0.862132 -0.430664 -0.529341 -0.35322 -0.437085 yield of O2 on food
Y_NX mol/mol 0.127227 0.118915 0.059402 0.0730125 0.04872 0.0602876 yield of N-waste on food
mu_TX J/mol 451024 422969 218754 265304 179385 219335 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