Statistics
Univariate
comparisons of bill and wing lengths between sexes and years were
implemented. To determine differences in phylogenetic relationships and
morphological features between years, it was assumed the composition of
different lineages might vary between the 2 years. The morphological
data set of dunlins from lineages inferred from phylogenetic
relationships was analyzed further. Bill, wing, and total head lengths
among different lineages and sexes were compared. The fit to the normal
distribution and homogeneity of variance of morphological data were
tested, and t -tests or Mann–Whitney U-tests were performed
sequentially. All statistical analyses were performed with
SPSS
22.0.