To confirm
normality, ф, biomass and specific ϕ data were analyzed by the
Shapiro Wilk test and the homoscedasticity of the residuals was assessed graphically, ф-biomass and specific ϕ data were not normal
and statistical differences between stations, times of day and fractions
were tested using Kruskal–Wallis test; and between regions
of Cabrera and Sóller were assessed using Wilcoxon Mann–Whitney
test.