Todarodes angolensis: 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_min f_max date: 2025/03/22
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - NaN NaN NaN NaN 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.00333934 0.00333934 0.00086515 0.00086515 spec pop growth rate
t2 d NaN NaN NaN NaN 207.57 207.57 801.188 801.188 population doubling time
a_b d NaN NaN NaN NaN 13.029 13.0939 13.029 13.0939 age at birth
t_j d NaN NaN NaN NaN 41.238 42.1554 41.238 42.1554 time since birth at metam
t_p d NaN NaN NaN NaN 209.06 165.457 209.06 165.457 time since birth at puberty
S_b - NaN NaN NaN NaN 1 1 1 1 survival probability at birth
S_j - NaN NaN NaN NaN 1 1 0.0971309 0.101077 survival probability at metam
S_p - NaN NaN NaN NaN 1 1 0.000623652 0.000624539 survival probability at puberty
theta_0b - NaN NaN NaN NaN 0.0696692 0.0724333 0.701712 0.698127 frac of ind that is embryo
theta_bj - NaN NaN NaN NaN 0.0667351 0.0693666 0.269341 0.271405 frac of ind between b and j
theta_jp - NaN NaN NaN NaN 0.134913 0.143539 0.0284372 0.0299538 frac of ind between j and p
theta_pi - NaN NaN NaN NaN 0.728683 0.714661 0.000510094 0.000513801 frac of ind that is adult
L_bi cm NaN NaN NaN NaN 2.80264 2.57312 0.0737123 0.0736083 mean structural length of post-natals
L2_bi cm^2 NaN NaN NaN NaN 12.2965 10.3987 0.0132365 0.0126253 mean squared structural length of post-natals
L3_bi cm^3 NaN NaN NaN NaN 61.9381 48.2115 0.0274312 0.023276 mean cubed structural length of post-natals
Ww_bi g NaN NaN NaN NaN 384.787 281.331 0.170415 0.135823 mean wet weight of post-natals
L_pi cm NaN NaN NaN NaN 3.52207 3.2793 1.57267 1.53098 mean structural length of adults
L2_pi cm^2 NaN NaN NaN NaN 15.6825 13.4786 4.09356 3.75616 mean squared structural length of adults
L3_pi cm^3 NaN NaN NaN NaN 79.0719 62.5675 15.5747 13.2074 mean cubed structural length of adults
Ww_pi g NaN NaN NaN NaN 491.23 365.103 96.7572 77.0696 mean wet weight of adults
R 1/d NaN NaN NaN NaN 2085.8 1928.21 252.742 388.344 mean reproduction rate of adults
J_X g/d NaN NaN NaN NaN 11.7153 9.18549 0.0080286 0.00690724 mean ingestion rate of wet food by post-natals
Y_PX mol/mol NaN NaN NaN NaN 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol NaN NaN NaN NaN 0.0176548 0.0175271 0.00295595 0.00291538 yield of living structure on food
Y_VX_d mol/mol NaN NaN NaN NaN 0.0632019 0.0681036 0.0842603 0.0906292 yield of dead structure on food
Y_EX mol/mol NaN NaN NaN NaN 0.092025 0.0847494 0.0154077 0.0140969 yield of living reserve on food
Y_EX_d mol/mol NaN NaN NaN NaN 0.329436 0.329304 0.439202 0.438223 yield of dead reserve on food
Y_CX mol/mol NaN NaN NaN NaN 0.388307 0.39094 0.348799 0.34476 yield of CO2 on food
Y_HX mol/mol NaN NaN NaN NaN 0.279149 0.281043 0.250748 0.247844 yield of H2O on food
Y_OX mol/mol NaN NaN NaN NaN -0.422284 -0.425148 -0.379319 -0.374927 yield of O2 on food
Y_NX mol/mol NaN NaN NaN NaN 0.058246 0.0586411 0.0523198 0.051714 yield of N-waste on food
mu_TX J/mol NaN NaN NaN NaN 200268 201955 178856 176952 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