New Zealand Journal of Marine and Freshwater Research abstracts

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Vaterite otoliths from chinook salmon (Oncorhynchus tshawytscha)

R. W. GAULDIE

Fisheries Research Centre Ministry of Agriculture and Fisheries P. O. Box 297, Wellington New Zealand

Abstract Vaterite replaces aragonite in a proportion of chinook salmon (Oncorhynchus tshaw-ytscha) otoliths. The degree of replacement varies from partial replacement to almost total. Occasionally both otoliths may be vateritic, but more often one is vateritic and the other is aragonitic. The vaterite replacement may be under single locus genetical control which can be overridden by temperatures above and below an optimum value. Vaterite otoliths show the same general conformation as aragonite otoliths in spite of the radically different amino acid metabolism that the occurrence of vaterite entails.

Keywords aragonite otoliths; chinook salmon; vaterite;

New Zealand Journal of Marine and Freshwater Research, 1986, Vol. 20: 209-217 Received 18 July 1985; accepted 19 September 1985

PDF file of entire paper: medium quality (1826K); (scanned from paper original: notes about this process)

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