Table 1

Evidence for density dependence using phenomenological time series data


wAICc
 %DD
Time series era
 q
 RW
 EX
 RL
 GL
 TL
 ΣwAICc
High-density (1951–1964)
 10
 0.187
 0.039
 0.372
 0.383
 0.019
 77.4
Low-density (1993–1999)
 21
 0.081
 0.025
 0.412
 0.380
 0.101
 89.3

Sample-size corrected Akaike weights (wAICc) and the number of yearly transitions (q) for density-independent models: random walk (RW), and exponential (EX), and density-dependent models: Ricker-logisitc (RL), Gompertz logistic (GL), and θ-logisitc (TL), of the population growth of southern elephant seals during the high-density era and low-density eras. The sum of the AICc weights for the density-dependent models represents the combined percentage support for density dependence (%DD).

de Little et al. BMC Ecology 2007 7:3   doi:10.1186/1472-6785-7-3