Dasyatis pastinaca: Population traits

at T = 17 °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: 2025/05/17
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.452749 0.452749 0.702919 0.702919 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000767997 0.000767997 4.36824e-05 4.36824e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 902.539 902.539 15867.9 15867.9 population doubling time
a_b d 382.701 384.908 374.254 375.745 369.55 370.626 369.55 370.626 age at birth
t_p d 5701.89 NaN 2310.15 2520.6 1848.12 1934.83 1848.12 1934.83 time since birth at puberty
S_b - 0.999973 0.99997 0.999975 0.999972 0.999976 0.999974 0.999976 0.999974 survival probability at birth
S_p - 0.999824 0.9998 0.328379 0.336415 0.99986 0.999843 0.304019 0.309455 survival probability at puberty
theta_0b - 0.0383426 0.040163 0.352213 0.34062 0.248053 0.248806 0.421231 0.412667 frac of ind that is embryo
theta_bp - 0.0383427 0.0401627 0.199186 0.194804 0.186752 0.187162 0.226596 0.22378 fraction of individuals that is juvenile
theta_pi - 0.923315 0.919674 0.448602 0.464577 0.565194 0.564032 0.352173 0.363553 frac of ind that is adult
L_bi cm 4.26385 3.92857 3.96383 3.82537 3.76723 3.65738 3.92773 3.85003 mean structural length of post-natals
L2_bi cm^2 19.0256 16.0863 20.8799 18.8792 18.0368 16.7793 23.4932 21.8402 mean squared structural length of post-natals
L3_bi cm^3 87.0693 67.4451 127.912 106.897 102.847 90.8243 179.189 155.097 mean cubed structural length of post-natals
Ww_bi g 647.831 463.863 1406.92 1082.37 1565.85 1269.92 2728.17 2168.59 mean wet weight of post-natals
L_pi cm 4.37661 4.03333 5.03861 4.78638 4.46814 4.32813 5.44288 5.25604 mean structural length of adults
L2_pi cm^2 19.7142 16.6848 29.0658 25.7847 23.0761 21.4346 36.9697 33.7307 mean squared structural length of adults
L3_pi cm^3 90.5222 70.226 182.945 150.093 135.231 119.389 291.749 247.992 mean cubed structural length of adults
Ww_pi g 673.522 482.989 2012.23 1519.75 2058.9 1669.32 4441.91 3467.45 mean wet weight of adults
R 1/d 0 0 0.003034 0.00187061 0.001022 0.000580624 0.0054906 0.00454867 mean reproduction rate of adults
J_X g/d 1.60254 1.23657 2.73054 2.25316 3.35563 2.8489 4.37074 3.70818 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 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 0 0 0 0.0235384 0.0244841 0.00179086 0.00182705 yield of living structure on food
Y_VX_d mol/mol 0.00757595 0.00781904 0.0146441 0.0151795 0.000484149 0.000546942 0.013876 0.0144849 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.334836 0.317856 0.0254752 0.023719 yield of living reserve on food
Y_EX_d mol/mol 0.0487922 0.0459575 0.146427 0.138518 0.00688707 0.00710047 0.197387 0.188045 yield of dead reserve on food
Y_CX mol/mol 0.771688 0.774085 0.674837 0.681658 0.485514 0.50009 0.603189 0.612858 yield of CO2 on food
Y_HX mol/mol 0.662771 0.66483 0.57959 0.585448 0.416988 0.429507 0.518054 0.526358 yield of H2O on food
Y_OX mol/mol -0.907254 -0.910073 -0.793389 -0.801408 -0.570807 -0.587944 -0.709154 -0.720522 yield of O2 on food
Y_NX mol/mol 0.0625693 0.0627636 0.0547165 0.0552695 0.039366 0.0405478 0.0489072 0.0496912 yield of N-waste on food
mu_TX J/mol 434243 435657 377967 381982 267739 276312 336126 341811 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