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ECB-ART-40378
Science 1967 Aug 04;1573788:557-8. doi: 10.1126/science.157.3788.557.
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Negative Growth and Longevity in the Purple Sea Urchin Strongylocentrotus purpuratus (Stimpson).

Ebert TA .


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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.

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Genes referenced: LOC100887844