Predictions & Data for this entry

Model: abj climate: MA migrate:
COMPLETE = 2.4 ecozone: MPSW, MI food: biP, jiAa
MRE = 0.148 habitat: 0jMp, jiMb gender: Hh
SMSE = 0.175 embryo: Mp reprod: O

Zero-variate data
ab0.8333 0.8487 (0.01844)dage at birthBeck1981
tj 7 6.946 (0.007779)dtime since birth at metamorphosisBeck1981
am3.65e+04 3.65e+04 (3.031e-05)dlife spanWiki
Lp 20 20 (1.083e-05)cmshell lenght at pubertyWiki
Li137 124.1 (0.09418)cmultimate shell heightWiki
L102.6 5.413 (1.082)cmshell length at 10 monthBeck1981
L178.3 8.989 (0.08299)cmshell length at 17 monthBeck1981
L9 52 46.66 (0.1027)cmshell length at 9 yrBonh1965
Wwb5.23e-07 5.197e-07 (0.006228)gwet dry weight at birthWiki
Wwi2e+04 2.069e+04 (0.03431)gultimate wet weightWiki
Ww1151.7e+04 1.646e+04 (0.03165)gwet weight at 115 cmWiki
Ri1.37e+06 1.371e+06 (0.0009724)#/dultimate reproduction rateWiki
dLj0.03288 0.01777 (0.4596)cm/dgrowth rate at settlementBeck1981
Uni-variate data
DatasetFigure(RE)Independent variableDependent variableReference
Pseudo-data at Tref
DataGeneralised animalTridacna gigasUnitDescription
v 0.02 0.02311cm/denergy conductance
kap 0.8 0.831-allocation fraction to soma
kap_R 0.95 0.475-reproduction efficiency
p_M 18 0.4883J/^3vol-spec som maint
k_J 0.002 6.222e-051/dmaturity maint rate coefficient
kap_G 0.8 0.7998-growth efficiency
k 0.3 0.3-maintenance ratio


  • Mantle's edges have zooxanthellae and the tendency to grow massive calcium carbonate shells (ref: Wiki)
  • Hermaphrodite (ref: Wiki)
  • A single pair of the crab Xanthasia murigera will often be found living within the cavity of the clam (ref: EoL)


  • kap_R is set at 0.95/2 because of hermaphroditism
  • Excremely low estimate for [p_M] probably links to symbiosis
  • In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3
  • Reproduction efficiency kap_R has been set to 0.95/2 because the species is simultaneous hermaphroditic


  • [Wiki]
  • [EoL]
  • [Beck1981] N. Beckvar. Cultivation, spawning, and growth of the giant clams Tridacna gigas, T. derasa, and T. squamosa in Palau, Caroline Islands. Aquaculture, 24:21--30, 1981.
  • [Bonh1965] K. Bonham. Growth rate of giant clam Tridacna gigas at Bikini Atoll as revealed by radioautography. Science, 149:300--302, 1965.
  • [Kooy2010] S. A. L. M. Kooijman. Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge, 2010.

Bibtex file with references for this entry

Bas Kooijman, 2017/08/07

accepted: 2017/08/07

refer to this entry as: AmP Tridacna gigas version 2017/08/07