I recently provided advice on the use of “single-fit” bootstrapping to obtain confidence intervals for indices of relative abundance, when fitting a delta-lognormal model to fisheries data. The key idea is that of resampling the model parameters from a multivariate normal distribution. This is computationally nice as it allows a parametric bootstrap confidence interval to be calculated without refitting the model. You can find more details about “single-fit” bootstrapping in these seminar slides.
David Fletcher Consulting 