Hypanus dipterurus: Population traits

at T = 14.9 °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: 2025/05/22
symbol units thinning falsethinning true thinning falsethinning true description
femalemale femalemale femalemale femalemale
f - 0.677145 0.677145 0.824595 0.824595 1 1 1 1 scaled functional response
r 1/d 0 0 0 0 0.000330201 0.000330201 5.67024e-05 5.67024e-05 spec pop growth rate
t2 d NaN NaN NaN NaN 2099.17 2099.17 12224.3 12224.3 population doubling time
a_b d 1021.45 1064.14 997.13 1034.47 976.474 1008.98 976.474 1008.98 age at birth
t_p d 7682.51 NaN 4340.11 NaN 3253.08 7797.09 3253.08 7797.09 time since birth at puberty
S_b - 0.999685 0.999522 0.999708 0.999562 0.999726 0.999594 0.999726 0.999594 survival probability at birth
S_p - 0.997799 0.996266 0.478258 0.560466 0.998283 0.997249 0.43638 0.503149 survival probability at puberty
theta_0b - 0.0743883 0.0897678 0.261338 0.224371 0.282794 0.294129 0.34972 0.308897 frac of ind that is embryo
theta_bp - 0.0743285 0.0896479 0.177968 0.165508 0.204712 0.210564 0.216154 0.204437 fraction of individuals that is juvenile
theta_pi - 0.851283 0.820584 0.560695 0.610121 0.512493 0.495306 0.434125 0.486666 frac of ind that is adult
L_bi cm 10.9574 8.51754 11.0019 9.18339 10.7078 9.16042 11.0778 9.66159 mean structural length of post-natals
L2_bi cm^2 124.002 73.8489 132.542 88.4565 126.839 89.5517 140.553 101.141 mean squared structural length of post-natals
L3_bi cm^3 1435.99 649.443 1704.33 884.467 1632.7 926.044 1977.52 1128.87 mean cubed structural length of post-natals
Ww_bi g 4951.49 1836.38 6785.3 2852.94 7535.52 3425.46 9126.99 4175.72 mean wet weight of post-natals
L_pi cm 11.3619 8.79552 12.4631 10.0123 12.321 10.3448 13.3364 11.0734 mean structural length of adults
L2_pi cm^2 131.31 78.0027 161.47 102.195 159.491 110.182 188.923 126.788 mean squared structural length of adults
L3_pi cm^3 1538.76 696.82 2159.3 1060.67 2161.44 1206.44 2816.7 1494.89 mean cubed structural length of adults
Ww_pi g 5305.85 1970.35 8596.64 3421.31 9975.82 4462.65 13000.1 5529.66 mean wet weight of adults
R 1/d 0 0 0.000674238 0 0.000756302 0 0.00142057 0 mean reproduction rate of adults
J_X g/d 7.47425 3.32304 9.72862 4.84709 11.2904 5.95092 12.5112 6.72107 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 0.0477503 0.0513838 0.00896242 0.00952372 yield of living structure on food
Y_VX_d mol/mol 0.0205359 0.0230212 0.0354048 0.0375622 0.00402479 0.0054408 0.0355157 0.0379078 yield of dead structure on food
Y_EX mol/mol 0 0 0 0 0.172635 0.138686 0.0324024 0.0257048 yield of living reserve on food
Y_EX_d mol/mol 0.0502745 0.0420742 0.105549 0.0835986 0.0145511 0.0146849 0.128402 0.102314 yield of dead reserve on food
Y_CX mol/mol 0.758329 0.763615 0.693446 0.711754 0.602789 0.629397 0.633941 0.661536 yield of CO2 on food
Y_HX mol/mol 0.651297 0.655837 0.595572 0.611297 0.517711 0.540563 0.544466 0.568166 yield of H2O on food
Y_OX mol/mol -0.891548 -0.897763 -0.815267 -0.836792 -0.708685 -0.739967 -0.745309 -0.777752 yield of O2 on food
Y_NX mol/mol 0.0614861 0.0619147 0.0562253 0.0577098 0.0488748 0.0510322 0.0514007 0.0536381 yield of N-waste on food
mu_TX J/mol 427080 430295 389886 400699 337697 353508 355547 371830 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