Negative Growth and Longevity in the Purple Sea Urchin Strongylocentrotus purpuratus (Stimpson)

See allHide authors and affiliations

Science  04 Aug 1967:
Vol. 157, Issue 3788, pp. 557-558
DOI: 10.1126/science.157.3788.557


Purple sea urchins were tagged, measured, and placed in a tidepool at Sunset Bay, Oregon. After 1 year, many animals had decreased in size. Accordingly, size is not necessarily a reliable index of age in Strongylocentrotus purpuratus; however, it is possible to conclude that these animals are relatively long-lived.