Predictions & Data for this entry

Model: abj climate: MA migrate: phylum:
COMPLETE = 2.7 ecozone: MAW food: bjPz, jiCi, jiCvf class:
MRE = 0.083 habitat: 0jMc, jiMb gender: D order:
SMSE = 0.011 embryo: Mc reprod: Os family:

Zero-variate data

Data Observed Predicted (RE) Unit Description Reference
ab 49 43.04 (0.1217) d age at birth Fors1984
tp 182 173.2 (0.04835) d age at puberty Wiki
am 250 274.7 (0.09897) d life span Fors1984
Wwb 0.035 0.032 (0.0858) g wet weight at birth Fors1984
Wwp 30 34.46 (0.1487) g wet weight at puberty Wiki
Wwi 55 56.2 (0.02182) g ultimate wet weight for females guess
Ni 800 786.8 (0.01644) # cum reprod at death guess

Uni- and bivariate data

Data Figure Independent variable Dependent variable (RE) Reference
tW_f Data for females, males time wet weight (0.1017) Fors1984
tW_m Data for females, males time wet weight (0.08423) Fors1984
tJX_f time eaten crab flesh (0.1323) Fors1984
tJX_m time eaten crab flesh (0.1209) Fors1984

Pseudo-data at Tref = 20°C

Data Generalised animal Octopus joubini Unit Description
v 0.02 0.0171 cm/d energy conductance
p_M 18 272.1 J/d.cm^3 vol-spec som maint
k_J 0.002 0.002 1/d maturity maint rate coefficient
k 0.3 0.04003 - maintenance ratio
kap 0.8 0.7374 - allocation fraction to soma
kap_G 0.8 0.8069 - growth efficiency
kap_R 0.95 0.95 - reproduction efficiency

Discussion

  • z is not well-fixed by data, size ultimate size is much larger than size at death
  • in view of fitting results, puberty does not coincide with mating and part of structure converts to eggs just before death
  • model abj has been used, meaning that settlement has no effect on acceleration
  • males are assumed to differ from females by {p_Am} only
  • mod_1: males have equal state variables at b, compared to females

Facts

  • semelparous: death at first spawning, female ventilates eggs and dies after hatching; No food intake during this period (Ref: Fors1984)
  • large bentic eggs (Ref: Fors1984)

Bibliography

Citation