Predictions & Data for this entry

Model: std climate: Csa migrate:
COMPLETE = 2.8 ecozone: TA food: biCi
MRE = 0.311 habitat: 0bTd, biFp gender: Dg
SMSE = 0.258 embryo: Tt reprod: O

Zero-variate data
ab153 69.94 (0.5429)dage at birthArna2018
ap3767 4542 (0.2057)dage at pubertyArna2018
am3.65e+04 3.195e+04 (0.1246)dlife spanArna2018
Lb2.6 3.061 (0.1774)cmcarapace length at birthArna2018
Lp10.7 9.856 (0.07887)cmcarapace length at pubertyArna2018
Li13.1 17.78 (0.3576)cmultimate carapace length Arna2018, BurbKuch2010
Wwb5.2 5.15 (0.009573)gwet weight at birth Arna2018, BurbKuch2010
Wwp236.5 171.9 (0.2731)gwet weight at pubertyArna2018
Wwi417 1010 (1.422)gultimate wet weightArna2018
Ri0.0137 0.008426 (0.3849)#/dmaximum reprod rateBurb1981
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
TO see Fig. 1 (109.1)TemperatureO2 Consumption RateArnaKuch2015
tW see Fig. 2 (0.2637)AgeWet WeightArna2018
tL see Fig. 3 (0.1282)AgeCarapce LengthArna2018
LW see Fig. 4 (0.08002)Carapace LengthWet WeightArna2018
Pseudo-data at Tref
DataGeneralised animalPseudemydura umbrinaUnitDescription
v 0.02 0.02572cm/denergy conductance
kap 0.8 0.6488-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 18.96J/^3vol-spec som maint
k_J 0.002 0.0019911/dmaturity maint rate coefficient
kap_G 0.8 0.7569-growth efficiency
k 0.3 0.8709-maintenance ratio


  • All stages experience torpor, and torpor is implemented by letting f switch backwards and forwards from f_zoo to 0 (ref: Arna2018)
  • Torpor occurs approximately late-December until mid-May every year (zoo popn) (ref: Arna2018)
  • Mating occurs after torpor in the pond, approximately July-August (zoo popn) (ref: Arna2018)
  • Egg laying occurs before torpor, approximately November-December (ref: Arna2018)
  • Torpor seems required for reproduction (ref: Kuch2017)
  • Average mass loss over torpor period is 7.9
  • Some individuals occasionally undergo a half-torpor season due to being used in the public exhibit pond (ref: Arna2018)
  • All coupling/mating, entry into torpor, and exit from torpor is artificially imposed by staff at Perth Zoo. Females may have been capable of becoming gravid ealier if given opportunity to mate prior. (ref: Arna2018)


  • Depressed state assumed ([p_M], v, k_J, reduced), during summer and embryo
  • This is the "Typical p_M" model of P. umbrina as presented in ArnaMitc2018
  • Predicted respiration data much higher than measure; weights set to zero


  • [Burb1981] Burbidge A. A. The ecology of the western swamp tortoise Pseudemydura umbrina (Testudines: Chelidae). Australian Wildlife Research, 8:203--223, 1981.
  • [Arna2018] S. Arnall, 2018. unplublished data
  • [ArnaKuch2015] S. Arnall, G. Kuchling, and N. Mitchell. A thermal profile of metabolic performance in the rare Australian chelid, Pseudemydura umbrina. Australian Journal of Zoology, 62:448--453, 2015.
  • [ArnaMitc2018] S. G. Arnall, N. J. Mitchell, Kuchling G., B. Durell, S. A. L. M. Kooijman, and M. R. Kearney. Life in the slow lane? A Dynamic Energy Budget model for Psuedemydura umbrina. Journal of Sea Research, 2018. to appear.
  • [BurbKuch2010] A. A. Burbidge, G. Kuchling, C. Olejnik, and L. Mutter. Western swamp tortoise (Pseudemydura umbrina) recovery plan, 4th edition. Technical report, 2010.
  • [Kooy2010] S.A.L.M. Kooijman. Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge, 2010.
  • [Kuch2017] G. Kuchling, 2017. pers. obs.

Bibtex file with references for this entry

Michael Kearney, Sophie Arnall, 2015/09/25 (last modified by Michael Kearney, et al. 2017/12/28)

accepted: 2017/12/28

refer to this entry as: AmP Pseudemydura umbrina version 2017/12/28