Predictions & Data for this entry

Model: abj climate: MC migrate: phylum:
COMPLETE = 2.5 ecozone: MANE, MANW, MPE, MIW food: bjP, biD, jiCi, jiS class:
MRE = 0.077 habitat: 0bMcb, bjMp, jiMcb, jiMi gender: D order:
SMSE = 0.010 embryo: Mbf reprod: O family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
tj_12 80 73.41 (0.08242) d time since birth at metam exoticsguide
tj_25 17 18.53 (0.08991) d time since birth at metam exoticsguide
tp 250 265.5 (0.06184) d time since birth at puberty ADW
am 2190 2190 (1.149e-05) d life span exoticsguide
Lp 3.3 3.062 (0.0722) cm carapace width at puberty BehrDumb2005
Li 6 6.396 (0.06608) cm ultimate carapace width for females BehrDumb2005
Lim 7.5 7.5 (1.718e-05) cm ultimate carapace width for males BehrDumb2005
Wwi 149 149 (0.0001921) g ultimate wet weight glaucus, BehrDumb2005
Ri 547.9 548 (0.0001339) #/d maximum reprod rate exoticsguide

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tWC_18 Data for 18, 12 C time since birth carbon weight (0.1698) DawiPusc1986
tWC_12 Data for 18, 12 C time since birth carbon weight (0.112) DawiPusc1986
LW carapace width wet weight (0.08489) MuncSpar1982
tL time since birth carapace width (0.08832) BehrDumb2005

Pseudo-data at Tref = 20°C

Data Generalised animal Carcinus maenas Unit Description
v 0.02 0.02355 cm/d energy conductance
kap 0.8 0.9851 - allocation fraction to soma
kap_R 0.95 0.95 - reproduction efficiency
p_M 18 86.64 J/d.cm^3 vol-spec som maint
k_J 0.002 0.002 1/d maturity maint rate coefficient
kap_G 0.8 0.8083 - growth efficiency

Discussion

  • Males are assumed to differ from females by {p_Am} only

Facts

  • C. maenas has a planktontic zoea stage, for by a planktontic megalopae stage and a bentic juvinle/adult stage (Ref: ADW)
  • Migrates yearly to deeper waters for spawning; copulation is directly after moulting; females carry eggs for several months (Ref: ADW)
  • crabs donot feed when tempertures drop below 7 C, and cannot molt in temperatures below 10 C (Ref: exoticsguide, BehrDumb2005)
  • Sexual maturity at moult 11 or 12 (Ref: BehrDumb2005)
  • there is no indication of a terminal instar in C. maenas, (Ref: BehrDumb2005)

Bibliography

Citation