The number of
crayfish counted within individual quadrats in
both transects was used to calculate the standard
error (SE), coefficient of variation (CV), and
95% confidence interval (CI) for the stationspecific
mean crayfish densities. Crayfish
densities were nonnormal (Shapiro-Wilk test) so
nonparametric analysis of variance was used to
compare station denities in each year.