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Published on: June 27, 2016
Varying frequency of vateritic otoliths in the Baltic herring Clupea harengus membras
Katja Mäkinen1, Marjut Rajasilta1, Ermei Mäkilä2
1Archipelago Research Institute, Biodiversity Unit, University of Turku, Turku, Finland.
Abstract:
We report observations of vateritic crystallization in the sagittal otoliths of the Baltic herring Clupea harengus membras in the northern Baltic Sea. While the existence of vaterite in the calcium carbonate matrix of sagittal otoliths has been observed in various species globally, reports from the brackish Baltic Sea are few in number. Large variation in the frequency of vaterite in 1984, 1988, 1997, 2010 and 2017 was observed, suggesting that the phenomenon is not static and more long-term studies should be conducted in search of the ultimate causing factors.
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