Hydra viridissima: Population traits

at T = 20 °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 stf f_minf f_max date: 2023/04/15
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.122793 0.122632 0.561316 0.561316 1 1 scaled functional response
r 1/d 0 0 0.113724 0.0633264 0.224892 0.100949 spec pop growth rate
t2 d NaN NaN 6.09501 10.9456 3.08214 6.86628 population doubling time
a_b d 1.53292 1.53292 1.53292 1.53292 1.53292 1.53292 age at birth
t_p d 106.596 155.225 13.0299 13.0299 7.06334 7.06334 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_p - 1 1 1 0.81038 1 0.658151 survival probability at puberty
theta_0b - 7.13343e-05 7.13351e-05 0.15998 0.183164 0.291596 0.322236 frac of ind that is embryo
theta_bp - 7.13343e-05 7.13351e-05 0.134386 0.149633 0.206568 0.224499 fraction of individuals that is juvenile
theta_pi - 0.999857 0.999857 0.705634 0.667203 0.501837 0.453265 frac of ind that is adult
L_bi cm 0.010412 0.0103984 0.0308631 0.0312145 0.033839 0.0343553 mean structural length of post-natals
L2_bi cm^2 0.000108448 0.000108165 0.00099323 0.00102596 0.00124627 0.00132499 mean squared structural length of post-natals
L3_bi cm^3 1.13025e-06 1.12583e-06 3.32925e-05 3.5454e-05 5.01142e-05 5.78037e-05 mean cubed structural length of post-natals
Ww_bi g 1.25847e-06 1.25338e-06 5.05567e-05 5.38391e-05 9.64115e-05 0.000111205 mean wet weight of post-natals
L_pi cm 0.0104112 0.0103976 0.0324028 0.0331124 0.0378892 0.0395316 mean structural length of adults
L2_pi cm^2 0.000108425 0.000108141 0.00108348 0.00113985 0.00152132 0.00169721 mean squared structural length of adults
L3_pi cm^3 1.12967e-06 1.12525e-06 3.73759e-05 4.07567e-05 6.49903e-05 7.95939e-05 mean cubed structural length of adults
Ww_pi g 1.25782e-06 1.25274e-06 5.67577e-05 6.18916e-05 0.000125031 0.000153125 mean wet weight of adults
R 1/d 5.98586e-05 2.44018e-05 0.321409 0.3406 0.628052 0.714964 mean reproduction rate of adults
J_X g/d 6.80918e-07 6.78252e-07 2.85073e-05 2.94466e-05 6.37253e-05 6.77505e-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 0.132813 0.0762455 0.176857 0.0861285 yield of living structure on food
Y_VX_d mol/mol 7.6994e-05 7.69944e-05 5.74079e-11 0.0571902 1.30452e-11 0.0869816 yield of dead structure on food
Y_EX mol/mol 0 0 0.068872 0.0395381 0.163387 0.0795684 yield of living reserve on food
Y_EX_d mol/mol 8.73423e-06 8.72285e-06 2.97696e-11 0.0296567 1.20516e-11 0.0803566 yield of dead reserve on food
Y_CX mol/mol 0.890539 0.890539 0.68894 0.687994 0.550381 0.55759 yield of CO2 on food
Y_HX mol/mol 0.649599 0.649599 0.502543 0.501854 0.401472 0.406731 yield of H2O on food
Y_OX mol/mol -0.968461 -0.968461 -0.749222 -0.748194 -0.598539 -0.606379 yield of O2 on food
Y_NX mol/mol 0.133581 0.133581 0.103341 0.103199 0.0825572 0.0836385 yield of N-waste on food
mu_TX J/mol 472457 472457 368214 367725 294209 297986 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