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Free Content Incidence of Boring Organisms in Gastropod Shells on Reefs Around Guam

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Abstract:

Boring organisms in living gastropods and in shells containing hermit crabs were investigated at fifteen sites around Guam. Forty eight of the fifty nine gastropod species collected were bored. The borers involved, in order of decreasing incidence, were the bryozoan Penetrantia clionoides; three species of acrothoracican barnacles, Cryptophialus coronophorus, cf. C. zulloi, and Lithoglyptes mitis; the foraminifer Cymbaloporella tabellaejormis; the polychaete Polydora sp.; and seven species of c1ionid sponge. At all sites, shells occupied by hermit crabs were more intensively bored than were shells containing the living gastropod. The groups chiefly responsible for this difference were the sponges and the bryozoan. In living gastropods, L. mitis, Polydora sp. and sponges favored sites with low surf activity while C. zulloi demonstrated a preference for high surf conditions. Clionid sponges were the only group capable of boring into the inner shell surface.

Document Type: Research Article

Publication date: March 1, 1990

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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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