Gracilechinus affinis (Sea urchin):  

Predictions & Data for this entry

Model:  abj  

MRE = 0.084
SMSE = 0.145

Zero-variate data
tp2000 1925 (0.03761)dtime since birth at pubertyMiddGurn1998
am1.1e+04 1.099e+04 (0.001244)dlife spanMiddGurn1998
Lb0.02 0.01986 (0.007186)cmlength at birthguess
Lp1.6 1.583 (0.01065)cmtest diameter at pubertyMiddGurn1998
Li5.5 5.293 (0.03762)cmultimate test diameterMiddGurn1998
Wwb2e-06 2.012e-06 (0.006053)gwet weight at birthguess
Wwp 1 1.019 (0.01944)gwet weight at pubertyMiddGurn1998
Wwi 37 38.11 (0.03011)gultimate wet weightMiddGurn1998
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
tL see Fig. 1 (0.1141)time since settlementtest diameterMiddGurn1998
tW see Fig. 2 (0.2076)time since birthwet weightMiddGurn1998
LR see Fig. 3 (0.4542)test diametergonad weightMiddGurn1998
Pseudo-data at Tref
DataGeneralised animalGracilechinus affinisUnitDescription
v 0.02 0.0009146cm/denergy conductance
kap 0.8 0.705-allocation fraction to soma
kap_R 0.95 0.95-reproduction efficiency
p_M 18 18.55J/^3vol-spec som maint
k_J 0.002 0.0021/dmaturity maint rate coefficient
kap_G 0.8 0.8005-growth efficiency


  • Weight at birth is guessed from Sterechinus which has Wd0 of 0.5 mug


  • Wiki
  • Kooy2010
  • MiddGurn1998

Bibtex files with references for this entry

Bas Kooijman, 2012/12/27

accepted: 2015/11/06

refer to this entry as: AmP Gracilechinus affinis version 2015/11/06