Sea urchin growth during one-year experiment.

<p>Test volume based on modified oblate spheroid estimate from test height and diameter [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0191278#pone.0191278.ref031" target="_blank">31</a>]. Sandstone = circles (tan = medium-grain, orange = fine-grain); mudstone = brown squares; granite = gray diamonds (n = 10 each treatment). The black stars are the means (± sd) of all urchins at each time point. The urchin silhouettes are scaled-sizes of the average diameter and height for each of the three sampling time points (30 mm scale).