Table 1. Depth, surface sampled and nature of sediments at the 10 stations sampled during ANDEEP III. Cat: categories of station location
(E: eastern, W: western part of the Weddell Sea without cidaroids; W*: station located in the western part of the Weddell Sea with
cidaroids); nr: number of rocks analyzed; nc: number of cidaroids collected; Cr and Cc: rates of colonization by sessile organisms on rocks
and cidaroids, respectively; Dr: approximation of mean diameter of rocks [(length + width) / 2]; Hr: mean height of rocks; Hc: mean height
of cidaroid tests with spines. Dr, Hr and Hc values are means ± SD. Dr and Hr: calculations performed only on colonized rocks