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Free Content The Ecology and Productivity of Moira Atropos (Lamarck)

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The ecology of the heart urchin Moira was studied in communities living at a depth of about 3 m in Biscayne Bay, Florida, Moira reaches a length of about 40 mm, 3 years after settlement, and does not grow thereafter, available energy being diverted to spawn production. There is a negative correlation between growth and temperature. Spawning is in the spring and early summer, and shows some correlation with the phase of the moon. Productivity is 3.61 g dry weight of tissue per square meter per year, of which about a third is in the form of spawn. This total is about the same value as the standing crop. By comparison, productivity is slightly less in a comparable population of Echinocardium cordatum in the Isle of Man.

Document Type: Research Article

Publication date: December 1, 1966

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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