ECOLOGers, Hi all. I am in need of some statistical advice. I am currently trying to find a way to combine two confidence intervals for a population estimate of a butterfly population. I'll give some basic background. The butterfly population was surveyed several times across the flight season using Distance sampling protocols. For each survey day we have a population estimate plus-minus error (in this case 95% CI). Then at the end of the flight season I am using the survey data from across the season to estimate a brood size (total # of adults) for the flight season. I am using an approach that is particularly reliant upon our estimates of longevity (from a previous MRR study) and with this estimate we have an associated confidence in our longevity estimate which results in variation of the brood size estimate.
My question is how do I combine the error from the Distance estimates with the error from our longevity estimates? Cheers, Tyler L Hicks PhD Student Washington State University - Vancouver E-mail: [email protected] Website: www.thingswithwings.org "Back off man, I'm a scientist!" - Bill Murray, Ghostbusters
