Predictions & Data for this entry
| Model: abj | climate: MA | migrate: | phylum: |
| COMPLETE = 2.5 | ecozone: MI, MPSW | food: bjPz, jiCi, jiCvf | class: |
| MRE = 0.189 | habitat: 0jMc, jiMr | gender: D | order: |
| SMSE = 0.053 | embryo: Mc | reprod: Os | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| ab_25 | 25 | 29.52 | (0.1807) | d | age at birth | Heuk1976 |
| ab_13 | 125 | 120.5 | (0.03611) | d | age at birth | Heuk1976 |
| ts | 32.5 | 52 | (0.5999) | d | time since birth at settlement | Heuk1976 |
| tp | 210 | 206.4 | (0.01732) | d | time since birth at puberty | HerwDepz2012 |
| am | 320.2 | 368.5 | (0.1508) | d | life span | Heuk1976 |
| Lb | 0.3 | 0.307 | (0.02323) | cm | mantle length at birth | Heuk1976 |
| Wwb | 0.0055 | 0.003736 | (0.3207) | g | wet weight at birth | guess |
| Wws | 0.3 | 0.2708 | (0.09735) | g | wet weight at settlement | Heuk1976 |
| Wwp | 1000 | 926.1 | (0.07393) | g | wet weight at puberty | Heuk1976 |
| Wwi | 3600 | 6336 | (0.7601) | g | ultimate wet weight | Heuk1976 |
| Ni | 7e+05 | 5.277e+05 | (0.2461) | # | cum reprod at death | Heuk1976 |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| tW |  | time since settlement | wet weight | (0.1672) | Heuk1976 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Octopus cyanea | Unit | Description |
|---|---|---|---|---|
| v | 0.02 | 0.0016 | cm/d | energy conductance |
| p_M | 18 | 2502 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 0.002 | 1/d | maturity maint rate coefficient |
| k | 0.3 | 0.00437 | - | maintenance ratio |
| kap | 0.8 | 0.4676 | - | allocation fraction to soma |
| kap_G | 0.8 | 0.8036 | - | 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
Facts
- semelparous: death at first spawning, 10 d after last hatch (Ref: Wiki)
- Digestion efficiency independent of feeding rate (Ref: Heuk1976)
- small eggs with a planktontic larval stage, difficult to culture (Ref: Heuk1976)
- hatches using a hatching gland (Hoyles organ) (Ref: Heuk1976)
- males and females grow at the same rate (Ref: Heuk1976)
Bibliography