Correction

Upon publication of this article [1] it was noticed errors were introduced during the production process which resulted in the omission of decimal points from Tables 2 and 3. In addition Table 1 incorrectly used commas to indicate decimal points. These errors do not change the scientific conclusions of the article in any way. The publisher apologizes for these errors. The correct versions of Tables 1, 2 and 3 appear below and have been updated in the original article.

Table 1 Conditions (mean values) in beakers during trial and main experiments
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Table 2 Lengths of spine tips of Paracentrotus lividus regenerated during trial experiments (3 spines per individual/ 3 individuals per treatment) and calculated average longitudinal extension rates (ALER) per treatment
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Table 3 Lengths of the spine tips of Echinometra sp. regenerated during trial experiments (3 spines per individual/3 individuals per treatment) and calculated average longitudinal extension rates (ALER) per treatment
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