Ursus arctos (Brown bear):  

Predictions & Data for this entry

Model:  stx  

MRE = 0.159
SMSE = 0.202

Zero-variate data
tg103 104.5 (0.01435)dgestation timeAnAge
tx213 247.7 (0.163)dtime since birth at weaningAnAge
tp1313 1687 (0.2846)dtime since birth at pubertyAnAge
am1.46e+04 1.264e+04 (0.1342)dlife spanAnAge
Li200 214.8 (0.07382)cmultimate head-body length for femaleWiki
Lim260 256.2 (0.01448)cmultimate head-body length for maleWiki
Wwb510 541.4 (0.06155)gwet weight at birthAnAge
Wwx2.6e+04 2.569e+04 (0.01181)gwet weight at weaningAnAge
Wwi2.775e+05 1.154e+05 (0.584)gultimate wet weightAnAge
Ri0.002347 0.00227 (0.03305)#/dmaximum reprod rateAnAge
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
tW_f see Fig. 1 (0.3286)time since birthwet weightSwenAdam2007
tW_m see Fig. 1 (0.2081)time since birthwet weightSwenAdam2007
Pseudo-data at Tref
DataGeneralised animalUrsus arctosUnitDescription
v 0.02 0.1378cm/denergy conductance
kap 0.8 0.915-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 32.71J/d.cm^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.7995-growth efficiency
t_0 0 75.4dtime at start development


  • northern pop are heavier in autumn, but lighter in spring than southern and hybernate for a longer time. Am pop are heavier because salmon eating (ref: SwenAdam2007)


  • Males are assumed to differ from females by {p_Am} only


  • Wiki
  • Kooy2010
  • SwenAdam2007
  • AnAge

Bibtex files with references for this entry

Bas Kooijman, 2012/10/13

accepted: 2015/11/06

refer to this entry as: AmP Ursus arctos version 2015/11/06 bio.vu.nl/thb/deb/deblab/add_my_pet/