Sphyrna zygaena: Population traits

at T = 26.5 °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_min f_max date: 2025/06/20
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.544797 NaN 0.624822 0.624822 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000959689 0.000959689 0.000182196 0.000182196 spec pop growth rate
t2 d NaN NaN NaN NaN 722.262 722.262 3804.4 3804.4 population doubling time
a_b d 319.894 NaN 319.894 NaN 319.894 319.893 319.894 319.893 age at birth
t_p d 8174.39 NaN 4173.36 NaN 2324.7 2359.33 2324.7 2359.33 time since birth at puberty
S_b - 0.999974 NaN 0.999974 NaN 0.999975 0.999974 0.999975 0.999974 survival probability at birth
S_p - 0.999848 NaN 0.386371 NaN 0.999863 0.999859 0.334428 0.336225 survival probability at puberty
theta_0b - 0.0314609 NaN 0.295361 NaN 0.264941 0.264957 0.444499 0.442443 frac of ind that is embryo
theta_bp - 0.0314587 NaN 0.181606 NaN 0.194892 0.194904 0.241722 0.241216 fraction of individuals that is juvenile
theta_pi - 0.93708 NaN 0.523033 NaN 0.540166 0.540139 0.313779 0.316341 frac of ind that is adult
L_bi cm 15.8458 NaN 12.2948 NaN 11.0384 10.9677 10.3804 10.3533 mean structural length of post-natals
L2_bi cm^2 265.485 NaN 191.996 NaN 154.097 151.7 161.449 159.617 mean squared structural length of post-natals
L3_bi cm^3 4583.88 NaN 3410.79 NaN 2579.77 2510.98 3366.82 3283.02 mean cubed structural length of post-natals
Ww_bi g 25817.9 NaN 21531.5 NaN 24515.1 23424.4 31994.4 30626.6 mean wet weight of post-natals
L_pi cm 16.2126 NaN 14.8914 NaN 13.1618 13.0687 14.5566 14.4708 mean structural length of adults
L2_pi cm^2 273.571 NaN 250.453 NaN 199.883 196.659 266.397 262.15 mean squared structural length of adults
L3_pi cm^3 4733.56 NaN 4554.04 NaN 3457.58 3364.35 5859.26 5686.61 mean cubed structural length of adults
Ww_pi g 26661 NaN 28748.6 NaN 32856.8 31385.4 55679.6 53049.2 mean wet weight of adults
R 1/d 0 NaN 0 NaN 0 0 0 0 mean reproduction rate of adults
J_X g/d 57.5824 NaN 47.76 NaN 61.3494 59.1587 64.2761 62.246 mean ingestion rate of wet food by post-natals
Y_PX mol/mol 0.109375 NaN 0.109375 NaN 0.109375 0.109375 0.109375 0.109375 yield of faeces on food
Y_VX mol/mol 0 NaN 0 NaN 0.0403553 0.0407339 0.00954355 0.00960951 yield of living structure on food
Y_VX_d mol/mol 0.0113129 NaN 0.0222538 NaN 0.000476432 0.000490417 0.0234009 0.0236117 yield of dead structure on food
Y_EX mol/mol 0 NaN 0 NaN 0.343135 0.339264 0.0811473 0.0800357 yield of living reserve on food
Y_EX_d mol/mol 0.0524048 NaN 0.118229 NaN 0.00405103 0.00408458 0.198974 0.196657 yield of dead reserve on food
Y_CX mol/mol 0.764889 NaN 0.693881 NaN 0.464912 0.468098 0.534242 0.537158 yield of CO2 on food
Y_HX mol/mol 0.656932 NaN 0.595946 NaN 0.399293 0.40203 0.458839 0.461343 yield of H2O on food
Y_OX mol/mol -0.899262 NaN -0.815779 NaN -0.546585 -0.550332 -0.628096 -0.631524 yield of O2 on food
Y_NX mol/mol 0.062018 NaN 0.0562606 NaN 0.0376955 0.0379539 0.0433169 0.0435534 yield of N-waste on food
mu_TX J/mol 430455 NaN 389483 NaN 256533 258416 296676 298395 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