Hi folks, I ve collected count data (once monthly) from eight trees (one trap per tree) for a species of protected slug in the UK over the past year. A fellow student here mentioned in passing that I could potentially use power statistics on my data to calculate the amount of time it would take to detect a red alert (50% or greater decrease in population size over 25 years) or amber alert (25% decrease over 25 years). Would this be possible and can anybody advise me on what statistics program I could use for my analysis? Looking forward to hearing from you Mark PS I did not remove specimens from the traps on my monthly visits. I just counted and left them in place.
