Free Content Evaluating Otolith Age Estimates for Hoplostethus Atlanticus by Comparing Patterns of Checks, Cycles in Microincrement Width, and Cycles in Strontium and Calcium Composition

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Analysis of proton microprobe data revealed cycles in strontium and calcium in the principal growth axis of the sagitta of the orange roughy Hoplostethus atlanticus (Trachichthyidae: Teleostei). Periodicities in the strontium and calcium composition of orange roughy otoliths were not related in a constant way to underlying periodicities in the patterns of checks in the otolith. The periodicities in microincrement widths were similar to periodicities of strontium variation in the otolith. The theory of both the physical chemistry of elemental deposition in the otolith, and the physiology of elemental concentrations in the endolymphatic sac support an extrinsic, annual cycle in otolith strontium content. An extrinsic, annual cycle in otolith strontium content provides a useful tool for evaluation of fish ages estimated from structural and chemical variation in otoliths.

Document Type: Research Article

Publication date: January 1, 1995

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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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