I have several study sites, 4 from 2009, 2 from 2010, and 5 from 2011, for a total of 11 sites. At each site, I have 3 quadrats (defined unit of space), and within each quadrat I placed 25 live oysters (75 then at each site). After 1 year, I went back to see how many I could find alive and dead, and then was able to calculate how many went missing (washed away by waves, animal ate, person took, etc). So what I do not know, is what the proper test is to run to compare between the different sites.
Someone once told me to do a contingency table analysis, another told me chi square, and also regression. If you have any suggestions or help that would be great. Thanks, Brian