The survival ability of the adult sand dollar Scaphechinus mirabilis (Agassiz) in varying environments was studied. In an experiment on a hard substrate, 88% of the animals survived for 40 days (August–September) during variation of sea water temperature from 21.0 to 16.5°C and variation of salinity from 33.3 to 31.5‰. At 17°C, the salinity tolerance range was 34–24‰. At the same temperature. 100% of the animals remained alive for 14 days within a salinity range from 34 to 18‰; at 16 and 14‰ the ratio of surviving sea urchins was 30 and 20% respectively. Thus, S. mirabilis has considerable adaptive capabilities and is able to survive for a long time under extreme environmental changes.
Russian Journal of Marine Biology – Springer Journals
Published: Jul 12, 2008
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