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: 2025/05/23
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.544797 0.544797 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 319.894 319.893 319.894 319.893 319.894 319.893 319.894 319.893 age at birth
t_p d 8174.39 1.61004e+22 4173.36 4404.41 2324.7 2359.33 2324.7 2359.33 time since birth at puberty
S_b - 0.999974 0.999974 0.999974 0.999974 0.999975 0.999974 0.999975 0.999974 survival probability at birth
S_p - 0.999848 0.999844 0.386371 0.389277 0.999863 0.999859 0.334428 0.336225 survival probability at puberty
theta_0b - 0.0314609 0.0317503 0.295361 0.292222 0.264941 0.264957 0.444499 0.442443 frac of ind that is embryo
theta_bp - 0.0314587 0.031748 0.181606 0.180335 0.194892 0.194904 0.241722 0.241216 fraction of individuals that is juvenile
theta_pi - 0.93708 0.936502 0.523033 0.527443 0.540166 0.540139 0.313779 0.316341 frac of ind that is adult
L_bi cm 15.8458 15.5554 12.2948 12.1829 11.0384 10.9677 10.3804 10.3533 mean structural length of post-natals
L2_bi cm^2 265.485 255.602 191.996 187.327 154.097 151.7 161.449 159.617 mean squared structural length of post-natals
L3_bi cm^3 4583.88 4326.73 3410.79 3267.48 2579.77 2510.98 3366.82 3283.02 mean cubed structural length of post-natals
Ww_bi g 25817.9 23959.2 21531.5 20271.5 24515.1 23424.4 31994.4 30626.6 mean wet weight of post-natals
L_pi cm 16.2126 15.9163 14.8914 14.7043 13.1618 13.0687 14.5566 14.4708 mean structural length of adults
L2_pi cm^2 273.571 263.437 250.453 243.322 199.883 196.659 266.397 262.15 mean squared structural length of adults
L3_pi cm^3 4733.56 4469.2 4554.04 4344.48 3457.58 3364.35 5859.26 5686.61 mean cubed structural length of adults
Ww_pi g 26661 24748.2 28748.6 26953.2 32856.8 31385.4 55679.6 53049.2 mean wet weight of adults
R 1/d 0 0 0 0 0 0 0 0 mean reproduction rate of adults
J_X g/d 57.5824 54.3039 47.76 45.6445 61.3494 59.1587 64.2761 62.246 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 0.0403553 0.0407339 0.00954355 0.00960951 yield of living structure on food
Y_VX_d mol/mol 0.0113129 0.0113948 0.0222538 0.0224164 0.000476432 0.000490417 0.0234009 0.0236117 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.343135 0.339264 0.0811473 0.0800357 yield of living reserve on food
Y_EX_d mol/mol 0.0524048 0.0517038 0.118229 0.116656 0.00405103 0.00408458 0.198974 0.196657 yield of dead reserve on food
Y_CX mol/mol 0.764889 0.765462 0.693881 0.695187 0.464912 0.468098 0.534242 0.537158 yield of CO2 on food
Y_HX mol/mol 0.656932 0.657424 0.595946 0.597067 0.399293 0.40203 0.458839 0.461343 yield of H2O on food
Y_OX mol/mol -0.899262 -0.899935 -0.815779 -0.817314 -0.546585 -0.550332 -0.628096 -0.631524 yield of O2 on food
Y_NX mol/mol 0.062018 0.0620645 0.0562606 0.0563665 0.0376955 0.0379539 0.0433169 0.0435534 yield of N-waste on food
mu_TX J/mol 430455 430794 389483 390255 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