Predictions & Data for this entry
| Model: std | climate: Af, Aw | migrate: | phylum: |
| COMPLETE = 2.8 | ecozone: TA | food: biCi, biHl, biHs | class: |
| MRE = 0.079 | habitat: 0bTd, biFr | gender: Dtmf | order: |
| SMSE = 0.014 | embryo: Tt | reprod: O | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| tp | 5110 | 4777 | (0.06522) | d | time since birth at puberty | arkive |
| am | 1.402e+04 | 1.402e+04 | (3.529e-05) | d | life span | ADW |
| Lb | 5.7 | 5.902 | (0.03538) | cm | carapace length at birth | arkive |
| Lp | 38 | 38.27 | (0.007007) | cm | carapace length at puberty | DoodGeor2003 |
| Li | 65 | 62.34 | (0.04092) | cm | ultimate carapace length | arkive |
| Wwb | 22 | 23.13 | (0.05115) | g | wet weight at birth | WebbChoq1986 |
| Wwp | 6000 | 6304 | (0.05066) | g | wet weight at puberty | DoodGeor2003 |
| Wwi | 3e+04 | 2.726e+04 | (0.09145) | g | ultimate wet weight | arkive |
| Ri | 0.1068 | 0.1139 | (0.06623) | #/d | maximum reprod rate | arkive, DoodGeor2003 |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| aJO |  | age | O_2 consumption | (0.1893) | WebbChoq1986 |
| aW |  | age | embryo weight | (0.1808) | WebbChoq1986 |
| aWY |  | age | yolk weight | (0.165) | WebbChoq1986 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Carettochelys insculpta | Unit | Description |
|---|---|---|---|---|
| k | 0.3 | 0.304 | - | maintenance ratio |
| v | 0.02 | 0.07542 | cm/d | energy conductance |
| kap | 0.8 | 0.7822 | - | allocation fraction to soma |
| kap_R | 0.95 | 0.95 | - | reproduction efficiency |
| p_M | 18 | 1.894 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 7.219e-05 | 1/d | maturity maint rate coefficient |
| kap_G | 0.8 | 0.7868 | - | growth efficiency |
Discussion
- Since egg size is very sensitive to environmental conditions, initial egg size is a free parameter to fit embryo data
- In view of low somatic maintenance, pseudodata k_J = 0.002 1/d is replaced by pseudodata k = 0.3
Facts
- Males develop from eggs incubated below 31.5 C, females above 32.5 C (Ref: ADW)
- Males are slightly smaller than females (Ref: arkive)
- Hatching is delayed till rain or flooding, which usually is at the start of the wet season (Ref: arkive)
- An adult's size depends on its habitat, with individuals near the coast being much larger than those near rivers (Ref: ADW)
Bibliography