Rhizoprionodon acutus: Population traits

at T = 31 °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: 2025/05/23
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.628522 0.628522 0.907659 0.907659 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000963115 0.000963115 5.37311e-05 5.37311e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 719.693 719.693 12900.3 12900.3 population doubling time
a_b d 303.042 309.522 288.888 293.878 285.757 290.394 285.757 290.394 age at birth
t_p d 1749.35 NaN 821.664 1008.05 734.329 870.639 734.329 870.639 time since birth at puberty
S_b - 0.999717 0.999653 0.999754 0.999703 0.999762 0.999713 0.999762 0.999713 survival probability at birth
S_p - 0.998016 0.997438 0.45392 0.486058 0.998541 0.998176 0.434386 0.463393 survival probability at puberty
theta_0b - 0.0711496 0.0779048 0.275275 0.256735 0.248511 0.253553 0.308421 0.289421 frac of ind that is embryo
theta_bp - 0.0710975 0.0778328 0.182786 0.176373 0.188608 0.191549 0.197556 0.191342 fraction of individuals that is juvenile
theta_pi - 0.857753 0.844262 0.541939 0.566893 0.562881 0.554899 0.494024 0.519237 frac of ind that is adult
L_bi cm 4.85387 4.29329 5.37584 4.96402 5.13321 4.74947 5.46464 5.09015 mean structural length of post-natals
L2_bi cm^2 24.2733 18.8581 32.4764 26.9709 29.3033 24.6321 34.3714 28.9565 mean squared structural length of post-natals
L3_bi cm^3 124.016 84.2837 212.721 156.395 181.989 137.226 238.618 178.545 mean cubed structural length of post-natals
Ww_bi g 345.944 215.271 762.445 507.399 700.141 476.542 918.003 620.031 mean wet weight of post-natals
L_pi cm 5.02086 4.43396 6.1989 5.6106 5.83957 5.36505 6.46387 5.89025 mean structural length of adults
L2_pi cm^2 25.6123 19.8868 40.4857 32.7431 36.0125 30.0614 44.5474 36.4486 mean squared structural length of adults
L3_pi cm^3 132.358 90.0685 275.599 197.331 233.3 175.263 323.147 234.834 mean cubed structural length of adults
Ww_pi g 369.213 230.047 987.816 640.21 897.543 608.63 1243.2 815.502 mean wet weight of adults
R 1/d 0.000238791 0 0.00336653 0.00179027 0.00258249 0.00141565 0.0042254 0.00257584 mean reproduction rate of adults
J_X g/d 1.65592 1.11729 3.19951 2.30763 3.1806 2.32192 3.73069 2.72956 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 0.0551079 0.0569203 0.00343669 0.00351465 yield of living structure on food
Y_VX_d mol/mol 0.0253449 0.0267557 0.0440211 0.045688 0.00559976 0.00643043 0.0438112 0.0455965 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.156901 0.140745 0.00978482 0.00869058 yield of living reserve on food
Y_EX_d mol/mol 0.0453548 0.0415818 0.113762 0.10254 0.0159434 0.0159004 0.124738 0.112745 yield of dead reserve on food
Y_CX mol/mol 0.758431 0.760616 0.677879 0.686718 0.607792 0.620331 0.655691 0.666072 yield of CO2 on food
Y_HX mol/mol 0.651385 0.653262 0.582203 0.589793 0.522008 0.532777 0.563146 0.572062 yield of H2O on food
Y_OX mol/mol -0.891669 -0.894238 -0.796966 -0.807357 -0.714567 -0.729309 -0.770879 -0.783085 yield of O2 on food
Y_NX mol/mol 0.0614944 0.0616716 0.0549632 0.0556798 0.0492805 0.0502971 0.0531641 0.0540058 yield of N-waste on food
mu_TX J/mol 427380 428728 381215 386466 341069 348533 368403 374566 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