AICc: Corrected AIC
In BruceKendall/PVA: Population viability analysis in R

Description Usage Arguments Details Value Author(s) References Examples

Calculates the corrected (for small sample size) Akaike Information Criterion for lm and nls objects.

AICc(x)

`x`	An `lm` or `nls` object

See eq. (4.8) in Morris and Doak (2002).

The corrected AIC of the model.

Bruce E. Kendall (kendall@bren.ucsb.edu)

Morris, W. F. and Doak D. F. (2002) Quantitative Conservation Biology: Theory and Practice of Population Viability Analysis. Sunderland: Sinauer Associates.

## Load the Jasper Ridge checkerspot butterfly data
data(checkerspot)
rt <- diff(log(checkerspot$N))
Nt <- checkerspot$N[-dim(checkerspot)[1]]

## Fit a Ricker model and extract the corrected AIC
ricker.nls <- nls(rt ~ mu*(1-Nt/K), start=list(mu=1,K=500))
AICc(ricker.nls)