Cyprideis torosa (Ostracod):  

Predictions & Data for this entry

Model:  abj  

MRE = 0.105
SMSE = 0.125

Zero-variate data
ab 10 9.442 (0.05579)dage at birthHeip1976
tp100 138.3 (0.383)dtime since birth at pubertyHeip1976
am365 364.9 (0.0003677)dlife spanHeip1976
Lb0.13 0.1354 (0.04158)cmshell length at birth Heip1976, HermHeip1982
Lp0.75 0.7629 (0.01724)cmshell length at pubertyHeip1976
Li1.1 1.037 (0.05706)cmultimate shell lengthHermHeip1982
Wdb4.5e-08 4.532e-08 (0.007141)gdry weight at birthHermHeip1982
Wdp1.03e-05 8.107e-06 (0.2129)gdry weight at pubertyHermHeip1982
Wdi2e-05 2.037e-05 (0.01858)gultimate dry weightHermHeip1982
Ri0.1 0.1001 (0.001202)#/dmaximum reprod rateHeip1976
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
tW see Fig. 1 (0.3644)time since birthdry weightHermHeip1982
Pseudo-data at Tref
DataGeneralised animalCyprideis torosaUnitDescription
v 0.02 0.004121cm/denergy conductance
kap 0.8 0.9901-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 258.8J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8006-growth efficiency


  • Cyprideis torosa is a very important meiofauna species in the shallow brackish water habitat we studied. The animals develop through eight larval instars before becoming adult. The eggs are produced during the summer months and are contained between the shells of the mother, as are the instar I animals. In autumn the development of the juveniles slows down and it stops altogether in winter. Due to this prolonged reproduction the population passes the winter in different stages (instar V to adult). Only in the next spring do overwintering juveniles become adult and reproduce. The species thus has one generation annually. (ref: Heip1976)


  • (ap,Wdp) is not on the data-curve for t-Wd


  • Wiki
  • Kooy2010
  • Heip1976
  • HermHeip1982

Bibtex files with references for this entry

Jan Baas, 2013/09/19 (last modified by Bas Kooijman 2016/10/15)

accepted: 2016/01/10

refer to this entry as: AmP Cyprideis torosa version 2016/01/10