Trace Elements in Walleye Tissues and Dietary Components from an Impoundment Located Downstream of the Leadville Mining District, Colorado, II: Cu, Zn, As, Cd, and Pb

Del Wayne R. Nimmo, Scott J. Herrmann, Igor V. Melnykov

Research output: Contribution to journalArticlepeer-review

Abstract

Trace elements in 15 walleye (Sander vitreus) tissues taken from the Pueblo Reservoir in Colorado corresponded to many metals of worldwide concern and were the same as those released into the Arkansas River from decades of mining at Leadville, Colorado. Therefore, analyses of walleye stomach contents, gizzard shad (Dorosoma cepedianum; a dietary prey item for walleye), and tissues of walleye were compared for an increase in, or a deficiency of, Cu, Zn, As, Cd, and Pb. Tissues were compared as couplets but also evaluated with tissues clustered into 6 functional groups. The trace elements were found to be tissue distinctive and functional-group specific. An interesting finding was that muscle, liver, gill, or whole bodies of fish - often indicators of trace elements - may not be as illustrative as adipose, skin, heart, bone, or stomach contents of the walleye. Results showed no significant differences in amounts of Pb among tissues within any of the 6 functional groups. We suggest that only 6 of 15 tissues might be necessary to indicate the uptake or lack of elements: heart, adipose, skin, bone, liver, and muscle, the latter of value for human consumption. Elements in gizzard shad, walleye stomach contents, livers, and muscle reflected historical element-rich colloidal sediments in the Arkansas River above the Pueblo Reservoir inlet. Despite the presence of trace elements in walleye tissues, this study suggests that a robust fishery of walleye in the Pueblo Reservoir exists and is likely to increase in the future.

Original languageEnglish (US)
Pages (from-to)362-377
Number of pages16
JournalWestern North American Naturalist
Volume82
Issue number2
DOIs
StatePublished - Jul 1 2022

Bibliographical note

Publisher Copyright:
© 2022 Authors

Fingerprint

Dive into the research topics of 'Trace Elements in Walleye Tissues and Dietary Components from an Impoundment Located Downstream of the Leadville Mining District, Colorado, II: Cu, Zn, As, Cd, and Pb'. Together they form a unique fingerprint.

Cite this