Predictions & Data for this entry
| Model: abj | climate: EF | migrate: | phylum: |
| COMPLETE = 2.5 | ecozone: TS | food: biH, biD | class: |
| MRE = 0.093 | habitat: 0jTd | gender: D | order: |
| SMSE = 0.028 | embryo: Ts | reprod: O | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| ab | 45 | 45.76 | (0.01697) | d | age at birth | BlocConv1955 |
| tp | 1825 | 1397 | (0.2347) | d | time since birth at puberty | BlocConv1955 |
| am | 2190 | 2300 | (0.05028) | d | life span | guess |
| Wdb | 2 | 2.787 | (0.3933) | mug | dry weight at birth | guess |
| Wdj | 3.6 | 3.235 | (0.1015) | mug | dry weight at metam | Conv1994 |
| Wdp | 52 | 66.94 | (0.2873) | mug | dry weight at puberty | Conv1994 |
| Wdi | 80 | 82.28 | (0.02853) | mug | ultimate dry weight | Conv1994 |
| Wwi | 180 | 178.9 | (0.006255) | mug | ultimate wet weight | Conv1994 |
| Ri | 0.0137 | 0.01473 | (0.07559) | #/d | maximum reprod rate | BlocConv1955 |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| tW_a |   | time | dry weight | (0.2165) | Conv1994 |
| tW_t | | time | dry weight | (0.4399) | BlocConv1955 |
| tW_d | | time | dry weight | (0.1719) | BlocConv1955 |
| tW_p | | time | dry weight | (0.5561) | Conv1994 |
| tWw_d12 |   | time | wet weight | (0.6419) | Conv1994 |
| tWw_d07 | | time | wet weight | (0.06294) | Conv1994 |
| tWw_d02 | | time | wet weight | (0.07833) | Conv1994 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Alaskozetes antarcticus | Unit | Description |
|---|---|---|---|---|
| v | 0.02 | 0.07972 | cm/d | energy conductance |
| p_M | 18 | 352.4 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 0.002 | 1/d | maturity maint rate coefficient |
| k | 0.3 | 0.0647 | - | maintenance ratio |
| kap | 0.8 | 0.8612 | - | allocation fraction to soma |
| kap_G | 0.8 | 0.8442 | - | growth efficiency |
| kap_R | 0.95 | 0.95 | - | reproduction efficiency |
Discussion
- cosinusoidal temperature profile assumed for field data: time t=365*(0:.025:1) (in d); temperature T = 15*cos((t-20)*2*pi/365)-5 (in C);
- the first 2 larval stage are assumed to accelerate; allocation to reproduction is assumed to start at adult stage
- feeding is assumed to cease below 0 C, to allow for shrinking during winter
Facts
- Survives in freezing conditions with almost no humidity (Ref: Wiki)
- One moult per yr, 5 post-embryo, pre-adult stages; reproduction in adult stage; the 2 larva stages are six-legged and only lightly sclerotized (Ref: BlocConv1955)
- protonymph, deutonymph and tritonymph are eight-legged, more robust and resemble the adult more closel (Ref: BlocConv1955)
Acknowledgment
- The creation of this entry was supported by the Norwegian Science Council (NFR 255295)
Bibliography