Hydra viridissima (Green hydra):  

Predictions & Data for this entry

Model:  stf  

MRE = 0.069
SMSE = 0.083

Zero-variate data
ab1.5 1.536 (0.02405)dage at birthMassRoch2008
tp 7 7.07 (0.01003)dtime since birth at pubertyMassRoch2008
am2e+05 2.001e+05 (0.0004348)dlife spanguess
Vb0.02 0.01926 (0.03693)mm^3volume at birthMassRoch2008
Vp0.14 0.1388 (0.008322)mm^3volume at pubertyMassRoch2008
Vi1.12 1.176 (0.04957)mm^3ultimate volumeMassRoch2008
Ri3.333 3.029 (0.09117)#/dmaximum reprod rateKali2011
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
tVs see Fig. 1 (0.08675)time since birthvolumeMassRoch2008
tAs see Fig. 2 (0.07689)time since birthsurface areaMassRoch2008
tN see Fig. 3 (1837)timenumber of individualsMassRoch2008
AN see Fig. 4 (0.3103)surface areanumber of budsKali2011
Pseudo-data at Tref
DataGeneralised animalHydra viridissimaUnitDescription
v 0.02 0.04235cm/denergy conductance
kap 0.8 0.6189-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 125.6J/d.cm^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8005-growth efficiency


  • Medusa stage is absent in Hydra (ref: Wiki)


  • Aging at individual level hardly occurs, since cell differentiation is reversible
  • A new bud is formed as soon as the earlier one steps off
  • Bud is treated similar to foetus


  • [Wiki] http://en.wikipedia.org/wiki/Hydra_viridissima.
  • [Kali2011] A. Kaliszewicz. Interference of asexual and sexual reproduction in the green hydra. Ecol Res, 26:147--152, 2011.
  • [Kooy2010] S.A.L.M. Kooijman. Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge, 2010.
  • [MassRoch2008] F. C. Massaro and O. Rocha. Development and population growth of Hydra viridissima pallas, 1766 (Cnidaria, Hydrozoa) in the laboratory. Braz. J. Biol., 68(2):379--383, 2008.

Bibtex files with references for this entry

Bas Kooijman, 2012/10/15 (last modified by Bas Kooijman 2018/01/06)

accepted: 2018/01/06

refer to this entry as: AmP Hydra viridissima version 2018/01/06 bio.vu.nl/thb/deb/deblab/add_my_pet/