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Growth lines in a bivalve mollusk: subdaily patterns and dissolution of the shell
Gordon, J.; Carriker, M.R. (1978). Growth lines in a bivalve mollusk: subdaily patterns and dissolution of the shell. Science (Wash.) 202(4367): 519-521
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
Peer reviewed article  

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Keyword
    Marine/Coastal

Authors  Top 
  • Gordon, J.
  • Carriker, M.R.

Abstract
    Scanning electron micrographs of sections of the prismatic shell of the bivalve Mercenaria mercenaria reveal narrow subdaily growth striations. The width of these narrow lines, formed by concentrations of organic material, corresponds to the quantity of shell material that would be expected to dissolve during periods of anaerobic metabolism. The pH in the extrapallial fluid of the bivalve decreases when the valves are closed, and the amount of dissolution of shell is related to the duration of valve closure.

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