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Science. 1967 Aug 4;157(3788):557-8.

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

Abstract

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.

PMID:
17801416
DOI:
10.1126/science.157.3788.557
[PubMed]
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