Carettochelys insculpta (Pig-nosed turtle):  

Predictions & Data for this entry

Model:  std  

MRE = 0.077
SMSE = 0.080

Zero-variate data
tp5110 4776 (0.0653)dtime since birth at pubertyarkive
am1.402e+04 1.402e+04 (3.529e-05)dlife spanADW
Lb5.7 5.902 (0.03538)cmcarapace length at birtharkive
Lp 38 38.26 (0.006958)cmcarapace length at pubertyDoodGeor2003
Li 65 62.34 (0.04092)cmultimate carapace lengtharkive
Wwb 22 23.13 (0.05115)gwet weight at birthWebbChoq1986
Wwp6000 6303 (0.05051)gwet weight at pubertyDoodGeor2003
Wwi3e+04 2.726e+04 (0.09145)gultimate wet weightarkive
Ri0.1068 0.1139 (0.06623)#/dmaximum reprod rate arkive, DoodGeor2003
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
aW see Fig. 1 (0.1808)ageembryo weightWebbChoq1986
aWY see Fig. 2 (0.165)ageyolk weightWebbChoq1986
aJO see Fig. 3 (0.1683)ageO_2 consumptionWebbChoq1986
Pseudo-data at Tref
DataGeneralised animalCarettochelys insculptaUnitDescription
k 0.3 0.304-maintenance ratio
v 0.02 0.07542cm/denergy conductance
kap 0.8 0.7822-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 1.894J/^3vol-spec som maint
k_J 0.002 7.219e-051/dmaturity maint rate coefficient
kap_G 0.8 0.7868-growth efficiency


  • Males develop from eggs incubated below 31.5 C, females above 32.5 C (ref: ADW)
  • Males are slightly smaller than females (ref: arkive)
  • Hatching is delayed till rain or flooding, which usually is at the start of the wet season (ref: arkive)
  • An adult's size depends on its habitat, with individuals near the coast being much larger than those near rivers (ref: ADW)


  • Since egg size is very sensitive to environmental conditions, initial egg size is a free parameter to fit embryo data
  • In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3


  • Wiki
  • Kooy2010
  • WebbChoq1986
  • DoodGeor2003
  • ADW
  • arkive

Bibtex files with references for this entry

Bas Kooijman, 2017/10/06

accepted: 2017/10/06

refer to this entry as: AmP Carettochelys insculpta version 2017/10/06