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 |   | time since birth | carbon weight | (0.1698) | DawiPusc1986 |
| tWC_12 | | 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