Biomphalaria alexandrina: Population traits

at T = 26 °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: 2025/05/23
symbol units thin falsethin truethin falsethin truethin falsethin truedescription
f - 0.238053 0.373329 0.686664 0.686664 1 1 scaled functional response
r 1/d 0 0 0.0303271 0.00398465 0.0485094 0.00683204 spec pop growth rate
t2 d NaN NaN 22.8557 173.954 14.2889 101.455 population doubling time
a_b d 0.737138 0.692378 0.632738 0.632738 0.59669 0.59669 age at birth
t_j d 0.00435114 0.00276617 0.0015129 0.0015129 0.00104949 0.00104949 time since birth at metam
t_p d 538.016 214.646 93.7286 93.7286 60.7395 60.7395 time since birth at puberty
S_b - 1 1 1 1 1 1 survival probability at birth
S_j - 1 0.999629 1 0.999606 1 0.999598 survival probability at metam
S_p - 0.999997 0.940963 0.999998 0.898817 0.999998 0.863639 survival probability at puberty
theta_0b - 0.00159299 0.0223706 0.018911 0.051331 0.0283884 0.0744802 frac of ind that is embryo
theta_bj - 9.53526e-06 9.03056e-05 4.51138e-05 0.000123467 4.95013e-05 0.000131488 frac of ind between b and j
theta_jp - 0.00160585 0.0218382 0.0186433 0.0487759 0.0276918 0.0692106 frac of ind between j and p
theta_pi - 0.996792 0.955701 0.962401 0.89977 0.94387 0.856178 frac of ind that is adult
L_bi cm 0.23836 0.216572 0.215666 0.204663 0.214475 0.199101 mean structural length of post-natals
L2_bi cm^2 0.0610697 0.0656474 0.0622135 0.0739563 0.0635451 0.0774815 mean squared structural length of post-natals
L3_bi cm^3 0.0163149 0.0239648 0.0223835 0.0390016 0.0243533 0.0495764 mean cubed structural length of post-natals
Ww_bi g 0.0165173 0.0244311 0.0231846 0.0403974 0.0256227 0.0521604 mean wet weight of post-natals
L_pi cm 0.23864 0.220032 0.218561 0.21217 0.218802 0.209782 mean structural length of adults
L2_pi cm^2 0.0611618 0.0670544 0.0633355 0.0777349 0.0652797 0.0833906 mean squared structural length of adults
L3_pi cm^3 0.0163409 0.0245081 0.0228125 0.0411052 0.0250602 0.0535669 mean cubed structural length of adults
Ww_pi g 0.0165436 0.024985 0.0236289 0.0425763 0.0263663 0.0563589 mean wet weight of adults
R 1/d 0.00756664 0.0377882 0.0884727 0.117228 0.145868 0.197685 mean reproduction rate of adults
J_X g/d 0.000626761 0.00105661 0.00184178 0.00218942 0.00273963 0.00334047 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 0.368571 0.0709813 0.431213 0.101395 yield of living structure on food
Y_VX_d mol/mol 0.0876726 0.163717 0.00272942 0.191611 0.00107136 0.21784 yield of dead structure on food
Y_EX mol/mol 0 0 0.0131911 0.00254041 0.0224754 0.00528485 yield of living reserve on food
Y_EX_d mol/mol 0.00108781 0.00318568 9.76856e-05 0.00685774 5.58409e-05 0.0113541 yield of dead reserve on food
Y_CX mol/mol 0.801865 0.723722 0.506036 0.618634 0.435809 0.55475 yield of CO2 on food
Y_HX mol/mol 0.579124 0.522688 0.365471 0.446791 0.314751 0.400653 yield of H2O on food
Y_OX mol/mol -0.872028 -0.787048 -0.550314 -0.672765 -0.473943 -0.603291 yield of O2 on food
Y_NX mol/mol 0.12028 0.108558 0.0759054 0.0927952 0.0653714 0.0832126 yield of N-waste on food
mu_TX J/mol 428065 388889 279541 336035 243966 303731 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