Table 1.
The five variations of the Gompertz population dynamics model in equation (2.1) that were fitted to each of the global population dynamics database time series using a Bayesian estimation framework. (Parameters that were estimated are denoted by ‘est.’. Remaining parameters were fixed at either zero or one.)
| model | process noise (σp) | observation error (σo) | growth rate (λ) | density-dependence (b) | autocorrelation in process noise (ϕ) |
|---|---|---|---|---|---|
| 1 | est. | est. | 0 | 1 | 0 |
| 2 | est. | est. | 0 | est. | 0 |
| 3 | est. | est. | est. | 1 | 0 |
| 4 | est. | est. | 0 | 1 | est. |
| 5 | est. | est. | est. | est. | 0 |