Predictions & Data for this entry
| Model: abp | climate: Cfb, Dfb, Dfc | migrate: | phylum: |
| COMPLETE = 2.5 | ecozone: TH, TPa | food: biAb, biHe | class: |
| MRE = 0.114 | habitat: 0iTg | gender: D | order: |
| SMSE = 0.055 | embryo: Tv | reprod: Apf | family: |
Zero-variate data
| Data | Observed | Predicted | (RE) | Unit | Description | Reference |
|---|---|---|---|---|---|---|
| ab | 10 | 4.882 | (0.5118) | d | age at birth | ShinSisk2003 |
| tp | 9 | 8.763 | (0.02637) | d | time since birth at puberty | Sequ1991 |
| am | 30 | 30.1 | (0.003255) | d | life span | Wiki |
| Lb | 0.14 | 0.1351 | (0.0353) | cm | total length at birth | guess |
| Lp | 0.4 | 0.4103 | (0.02564) | cm | total length at puberty | Wiki |
| Wdb | 0.042 | 0.03703 | (0.1184) | mg | dry weight at birth | Sequ1991 |
| Wdp | 1 | 1.038 | (0.03778) | mg | dry weight at puberty | Sequ1991 |
| Ri | 12 | 10.11 | (0.1578) | #/d | maximum reprod rate | Wiki |
Uni- and bivariate data
| Data | Figure | Independent variable | Dependent variable | (RE) | Reference |
|---|---|---|---|---|---|
| tW |  | time since birth | dry weight | (0.1076) | Sequ1991 |
Pseudo-data at Tref = 20°C
| Data | Generalised animal | Acyrthosiphon pisum | Unit | Description |
|---|---|---|---|---|
| v | 0.02 | 0.031 | cm/d | energy conductance |
| p_M | 18 | 17.64 | J/d.cm^3 | vol-spec som maint |
| k_J | 0.002 | 0.002 | 1/d | maturity maint rate coefficient |
| k | 0.3 | 0.5044 | - | maintenance ratio |
| kap | 0.8 | 0.7641 | - | allocation fraction to soma |
| kap_G | 0.8 | 0.7994 | - | growth efficiency |
| kap_R | 0.95 | 0.95 | - | reproduction efficiency |
| g | 1 | 0.8765 | - | energy investment ratio |
Discussion
- Allocation to reproduction is here assumed to occur in the final instar only, but this is questionable
- Pseudodata g = 1 is added to avoid convergence to very low g with very high z
Facts
- parthenogenetic, sexual eggs overwinter and hatch into females (Ref: Sequ1991)
- nymphs hatch and reach maturity in 4 moults (Ref: Sequ1991)
- Besides differences between sexual and parthenogenetic morphs, winged and wingless morphs exist (Ref: Wiki)
- A. pisum hosts primary endosymbiont Buchnera aphidicola, for synthesis of amino acids, required for reproduction; Buchnera is transmitted from mothers to offspring, A. pisum also hosts a range of facultative bacterial symbionts that can be transmitted maternally and horizontally (Ref: Wiki)
- diapauze is temp independent (Ref: ShinSisk2003)
- growth rate of asexually-produced embryos approximately doubles between 5 C and 10 C and between 10 C and 16 C: T_A = 10.5 kK (Ref: ShinSisk2003)
Bibliography