microincrement

microincrement
growth increments less than 50 μm in otoliths or other structures used in ageing, only observable with a microscope and used to describe daily or shorter increments

Dictionary of ichthyology. 2009.

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  • microincrement scale — a scale present from the early life history of a fish which has not been resorbed …   Dictionary of ichthyology

  • D-zone — that part of a microincrement of an otolith that is dark in transmitted light or is a depressed region when acid etched and seen with a scanning electron microscope. It has more organic matrix and less calcium carbonate than the L zone, q.v. Also …   Dictionary of ichthyology

  • incremental zone — L zone (that part of a microincrement of an otolith that is light in transmitted light or is an elevated region when acid etched and seen with a scanning electron microscope. It has less organic matrix and more calcium carbonate than the D zone,… …   Dictionary of ichthyology

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