The final test diameter (at day 90) varied
significantly among foods (one-way ANOVA, P b 0.05, Fig. 1 and Supplementary
Fig. S1). Sea urchins fed with Porphyra sp. and G. chilensis had
the largest diameters (11.69±0.19 and 10.79±0.22mm, respectively)
and were significantly larger than urchins fed all other foods (Tukey's
test, P b 0.05). M. pyrifera and the control treatment produced the
lowest values (7.47 ± 0.16 and 4.88 ± 0.14 mm, respectively).