Predictions & Data for this entry

Model: std climate: MA, MB migrate: Mo phylum:
COMPLETE = 2.7 ecozone: MC food: biCi, biCvf class:
MRE = 0.121 habitat: 0iMr gender: D order:
SMSE = 0.038 embryo: Mv reprod: O family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
ab 50 38.75 (0.2249) d age at birth GilmDod1993
tp 2190 1648 (0.2473) d time since birth at puberty for females ADW
tpm 1642 1532 (0.06745) d time since birth at puberty for males ADW
am 4380 4380 (1.34e-05) d life span AnAge
Lb 10 12.81 (0.2808) cm total length at birth GilmDod1993
Lp 220 269.5 (0.225) cm total length at puberty for females fishbase
Lpm 195 243.8 (0.2501) cm total length at puberty for males ADW
Li 330 376 (0.1394) cm ultimate total length for females fishbase
Wwb 9.2 9.343 (0.01559) g wet weight at birth fishbase
Wwp 8.166e+04 8.705e+04 (0.06603) g wet weight at puberty for females fishbase
Wwpm 5.728e+04 5.912e+04 (0.03206) g wet weight at puberty for males fishbase
Wwi 2.69e+05 2.364e+05 (0.1213) g ultimate wet weight fishbase
Ri 2.74 2.746 (0.002381) #/d maximum reprod rate at 269 cm GilmDod1993

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tL_f Data for females, males time since birth total length (0.09819) CoveKist1991
tL_m Data for females, males time since birth total length (0.06398) CoveKist1991
tL_e age total length (0.506) GilmDod1993

Pseudo-data at Tref = 20°C

Data Generalised animal Carcharias taurus Unit Description
v 0.02 0.056 cm/d energy conductance
kap 0.8 0.9245 - allocation fraction to soma
kap_R 0.95 0.95 - reproduction efficiency
p_M 18 32.94 J/d.cm^3 vol-spec som maint
k_J 0.002 0.002 1/d maturity maint rate coefficient
kap_G 0.8 0.8012 - growth efficiency

Discussion

  • Males are assumed to differ from females by {p_Am} only
  • Although the reproduction rate is high, due to sibling cannibalism, only 1 pup of 1 m is produced each 2 yr
  • Life span of 12 yr seems too short, compared to other sharks
  • The fit ignors embryo data that show a low length at high age
  • Early juvenile data are underestimated, probably by ignoring gut contents
  • mod_1: males have equal state variables at b, compared to females

Facts

  • Preferred temp 26 C (Ref: fishbase)
  • Depth: 0 - 60 m (Ref: ADW)
  • Weight (g) - length (cm): Ww = 0.0106 * L^2.940 (Ref: fishbase)

Bibliography

Citation