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Free Content Habitat Selection in Two Intertidal Snails, Genus Nerita

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Adult Nerita versicolor and Nerita tessellata occupy higher and lower but overlapping zones of the rocky intertidal coast of the Florida Keys. Field and laboratory experiments suggest that the zonation is an active habitat selection based on responses to largely physical factors of light, water depth and slope. Both species are nocturnal, photonegative and are crevice dwellers. Both species migrate with the tide but N. versicolor retreats higher above the rising tide. Evidence for competitive exclusion is lacking but the zonation, though blurred at night when both species wander, does achieve some measure of resource partitioning.

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Document Type: Research Article

Publication date: 1984-03-01

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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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