Dikerogammarus villosus (Killer shrimp):  

Predictions & Data for this entry

Model:  abj  

MRE = 0.174
SMSE = 0.189

Zero-variate data
ab 14 15.75 (0.1249)dage at birthPoeckl2007
tp 60 55.46 (0.07562)dtime since birth at pubertyPoeckl2009
am330 330 (4.929e-05)dlife spanPiscart2003
Lb0.19 0.1842 (0.03065)cmtotal length at birthPoeckl2009
Lp0.65 0.7001 (0.07703)cmtotal length at pubertyPoeckl2009
Li1.8 1.781 (0.01078)cmultimate total lengthPoeckl2007
Wwi 85 125 (0.4711)mgultimate wet weightPoeckl2007
Ri10.53 6.365 (0.3954)#/dmaximum reprod ratePoeckl2007
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
tWd see Fig. 1 (0.1211)experimental timedry weightGabel2011
tL see Fig. 2 (0.1377)experimental timelengthGabel2011
tL2 see Fig. 3 (0.05159)experimental timelengthGergs2008
tL3 see Fig. 3 (0.04836)experimental timelengthGergs2008
tL4 see Fig. 3 (0.02725)experimental timelengthGergs2008
LW see Fig. 4 (0.3663)lengthwet weightDobrzycka2016
LW2 see Fig. 4 (0.4015)lengthwet weightMaier2011
Tab see Fig. 5 (0.1555)temperatureage at birthPoeckl2007
WR see Fig. 6 (0.6178)wet weigthegg numberPoeckl2007
tL5 see Fig. 7 (0.02046)timelengthPoeckl2009
Pseudo-data at Tref
DataGeneralised animalDikerogammarus villosusUnitDescription
v 0.02 0.00857cm/denergy conductance
kap 0.8 0.7055-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 1660J/d.cm^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.6093-growth efficiency


  • We assume 11 days time between broods at reference temperature (20C). This is about the age at birth from the Tab data set, assuming that development starts directly after the last brood has been released. We do not have any information of the actual time between broods, and it might take longer than 11 days because of a mating period, or shorter if a new brood is already developing before the last has been released.
  • The estimation does converge but the routine does not stop before a large amount of steps. The resulting parameters remain similar.


  • Kooy2010
  • Poeckl2007
  • Poeckl2009
  • Piscart2003
  • Gabel2011
  • Gergs2008
  • Dobrzycka2016
  • Maier2011

Bibtex files with references for this entry

Andre Gergs, 2017/06/28

accepted: 2017/10/27

refer to this entry as: AmP Dikerogammarus villosus version 2017/10/27 bio.vu.nl/thb/deb/deblab/add_my_pet/