Elevated manganese concentrations at the cores of clupeid otoliths: possible environmental, physiological, or structural origins

By D. Brophy, Teresa E. Jeffries, B. Danilowicz. 2004

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In search of the dead zone: Use of otoliths for tracking fish exposure to hypoxia (2015, unknown): “For one thing, manganese can be found in high concentrations in the primordia (nucleation points in the core) of otoliths of some fish species (e.g., Ben-Tzvi et al., 2007; Brophy et al., 2004; Ruttenberg et al., 2005), sometimes along with other trace elements (Limburg et al., 2013).”
Otolith Biochemistry—A Review (2019, background): “During LA-ICP-MS analyses of otolith cores, both manganese and phosphorous have been found to be concentrated in the primordium (Brophy et al., 2004; Shima and Swearer, 2009).”
Elevated levels of trace elements in cores of otoliths and their potential for use as natural tags (2005, result): “These data confirm the preliminary findings of Brophy et al. (2004) that Mn is highly enriched in the core of clu Furthermore, our data confirm that the Mn spike we used as a proxy for the core does in fact corre spond to the core.”
OTOLITH CHEMISTRY TO DESCRIBE MOVEMENTS AND LIFE-HISTORY PARAMETERS OF FISHES : HYPOTHESES, ASSUMPTIONS, LIMITATIONS AND INFERENCES (2008, background): “however, otolith cores appear to be chemically distinct from material deposited after hatching (brophy et al. 2004), and oocyte chemistry can reflect artificial tags of the mother for ba (Thorrold et al.”