Macrobiotus hufelandii (Water-bear):  

Predictions & Data for this entry

Model:  abj  

MRE = 0.079
SMSE = 0.086

Zero-variate data
ab28.5 26.46 (0.07145)dage at birthGrev1980
tp 21 23.97 (0.1414)dtime since birth at pubertyGrev1980
am900 899.6 (0.0004042)dlife spanEarth
Lb0.02275 0.02412 (0.0602)cmtotal length at birthGrev1980
Lp0.035 0.03198 (0.08637)cmtotal length at pubertyGrev1980
Li0.12 0.1219 (0.0158)cmultimate total lengthMorgKing1976
Wwb4.48e-07 5.11e-07 (0.1406)gwet weight at birthestimate
Wwp1.63e-06 1.191e-06 (0.2695)gwet weight at pubertyestimate
Wwi6.57e-05 6.596e-05 (0.003987)gultimate wet weightestimate
Ri0.125 0.1254 (0.002926)#/dmaximum reprod ratewild guess
Pseudo-data at Tref
DataGeneralised animalMacrobiotus hufelandiiUnitDescription
v 0.02 0.001032cm/denergy conductance
kap 0.8 0.8942-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 28.79J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8038-growth efficiency


  • The cuticle is moulted about four times during the life cycle. (ref: bumblebee)
  • Some species lay their eggs inside the moulted cuticle, into which males shed sperm. (ref: bumblebee)
  • It appears that egg laying and defecation can only happen during moulting. (ref: bumblebee)


  • Wiki
  • Kooy2010
  • MorgKing1976
  • Grev1980
  • Baum1970
  • bumblebee
  • Earth

Bibtex files with references for this entry

Bas Kooijman, 2012/12/24 (last modified by Bas Kooijman 2015/03/11)

accepted: 2016/03/02

refer to this entry as: AmP Macrobiotus hufelandii version 2016/03/02