Elemental signatures in otoliths of hatchery rainbow trout (Oncorhynchus mykiss): Distinctiveness and utility fo detecting origins and movement

D. K. Gibson-Reinemer; B. M. Johnson; P.J. Martinez; D.L. Winkelman; A.E. Koenig; J.D. Woodhead

doi:10.1139/F09-015

Elemental signatures in otoliths of hatchery rainbow trout (Oncorhynchus mykiss): Distinctiveness and utility fo detecting origins and movement

Canadian Journal of Fisheries and Aquatic Sciences

By: D. K. Gibson-Reinemer, B. M. Johnson, P.J. Martinez, D.L. Winkelman, A.E. Koenig, and J.D. Woodhead

https://doi.org/10.1139/F09-015

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Abstract

Otolith chemistry in freshwater has considerable potential to reveal patterns of origin and movement, which would benefit traditional fisheries management and provide a valuable tool to curb the spread of invasive and illicitly stocked species. We evaluated the relationship between otolith and water chemistry for five markers (Ba/Ca, Mn/Ca, Sr/ Ca, Zn/Ca, and ⁸⁷Sr/⁸⁶Sr) in rainbow trout (Oncorhynchus mykiss) using the existing hatchery system in Colorado and Wyoming, USA, to provide controlled, seminatural conditions. Otolith Ba/Ca, Sr/Ca, and ⁸⁷Sr/⁸⁶Sr reflected ambient levels, whereas Mn/Ca and Zn/Ca did not. Using only the markers correlated with water chemistry, we classified fish to their hatchery of origin with up to 96% accuracy when element and isotope data were used together. Large changes in ^87Sr/Sr were evident in otolith transects, although subtler changes in Sr/Ca were also detectable. Our results suggest the relatively few otolith markers that reflect ambient chemistry can discriminate among locations and track movements well enough to provide valuable insight in a variety of applied contexts.

Additional publication details
Publication type	Article
Publication Subtype	Journal Article
Title	Elemental signatures in otoliths of hatchery rainbow trout (Oncorhynchus mykiss): Distinctiveness and utility fo detecting origins and movement
Series title	Canadian Journal of Fisheries and Aquatic Sciences
DOI	10.1139/F09-015
Volume	66
Issue	4
Year Published	2009
Language	English
Larger Work Type	Article
Larger Work Subtype	Journal Article
Larger Work Title	Canadian Journal of Fisheries and Aquatic Sciences
First page	513
Last page	524
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