Abstract
Little is known about partitioning coefficients, tissue bioaccumulation, trophic transfer, and otolith timeseries analyses of selenium (Se) in a fishery dominated by walleye (Sander vitreus) that consume multiple prey species and occur in a Se-rich reservoir. Concentrations of dissolved total Se in Pueblo Reservoir water consistently exceeded the current EPA criterion benchmark for lentic aquatic ecosystems. The major objectives of this study were to analyze Se in diet-borne consumables of a walleye fishery and perform time-series trend tests of 21 walleye sagittae. In contrast to previous reports, we proposed investigating Se partitioning from water to subsequent trophic levels in a meso-eutrophic ecotonal reservoir using concentrations in water, sediment, periphyton, filamentous algae, diatom mats, chironomids, whole crayfish, muscle of stocked rainbow trout (Oncorhynchus mykiss), whole gizzard shad (Dorosoma cepedianum), and tissues of walleye analyzed by ICP-MS. The indicator values for the level-1 (water to particulate) partitioning coefficients (Kd values) or enrichment factors were as high as 2325 L/kg dw and as low as 588 L/kg dw. Of 36 trophic transfer factors (TTFs) for invertebrates, 33 were >1, while for walleye tissues, 57 of 90 TTFs were <1. For gizzard shad, 8 of 8 TTFs were >1.8. We proposed nonlinear food-web exposure scenarios for walleye and gizzard shad in the Pueblo Reservoir ecosystem. Temporal series analyses of walleye sagittal otoliths showed significantly increasing annular Se concentrations over time for 19 of 21 walleye. Concentrations of Se in whole-body gizzard shad were greater than Se levels in the 3 highest walleye tissues (liver, gill, and kidney). This is the first comprehensive Se study that addresses nearly all components of a walleye ecosystem.
Poco se conoce acerca de los coeficientes de fraccionamiento, bioacumulacion de tejido, transferencia trofica y analisis de series temporales de otolitos de selenio (Se) en la pesca dominada por peces leucoma, quienes consumen multiples especies de presas que estan presentes en un yacimiento rico en seleniferos. Las concentraciones totales de selenio disuelto en el agua del “Embalse de Pueblo” sistematicamente excedieron el criterio de referencia actual de la EPA para los ecosistemas acuaticos lenticos. El principal objetivo de este trabajo fue analizar la presencia y cantidad de selenio (Se) consumido a traves de la dieta en una pesqueria de leucomas, asi como analizar su tendencia utilizando series de tiempo en 21 peces leucoma sagitaria. A diferencia de reportes previos, en este trabajo investigamos la fragmentacion de selenio en el agua en los niveles troficos posteriores, en un reservorio ecotonal meso-eutrofico, muestreando concentraciones en agua, sedimentos, perifiton, algas filamentosas, esteras de diatomeas, quironomidos, cangrejos de rio, Musculo de trucha arcoiris (Oncorhynchus mykiss), peces sabalo molleja (Dorosoma cepedianum) y tejidos de lucioperca (Sander vitreus) analizados por ICP-MS. Los valores indicador para los coeficientes de fragmentacion (Kd) o factores de enriquecimiento (EF) del nivel 1 (agua a particulas) fueron tan altos como 2325 (L/kg dw) y tan bajos como 588 (L/kg dw). De 36 factores de transferencia trofica (TTF) para invertebrados, 33 fueron >1, mientras que, para tejidos de leucomas, 57 de 90 TTF fueron <1. En el sabalo molleja, ocho de ocho TTF fueron >1.8. Sugerimos escenarios de exposicion no lineal de la red trofica para la lucioperca y el sabalo molleja en el ecosistema del Embalse de Publo. Los analisis de series temporales de otolitos sagitales de leucomas mostraron concentraciones de selenio significativamente en aumento a lo largo del tiempo en 19 de 21 leucomas. Las concentraciones de selenio en todo el cuerpo del sabalo molleja fueron mayores que los niveles de selenio en los tejidos de la lucioperca (higado, branquias y rinon). Este es el primer estudio integral de selenio que aborda casi todos los componentes del ecosistema de las leucomas.
Recommended Citation
Herrmann, Scott J.; Nimmo, Del Wayne R.; Herrmann-Hoesing, Lynn M.; Melnykov, Igor V.; and Halden, Norman M.
(2023)
"Field-based selenium partitioning coefficients, trophic transfer factors, and otolith time-series analyses for a walleye community from an ecotonal plains reservoir, Colorado. III.,"
Western North American Naturalist: Vol. 83:
No.
3, Article 7.
Available at:
https://scholarsarchive.byu.edu/wnan/vol83/iss3/7
Operating conditions for Agilent 7500ce ICP-MS.
83.3.7 Supplementary Material 2.pdf (34 kB)
Instrument operating conditions and data acquisition parameters for sagittal otolith analysis by LA-ICP-MS.
83.3.7 Supplementary Material 3.pdf (27 kB)
Percent mean dry weight to wet weight tissue conversion factors for primary producers, walleye prey, and walleye stomach contents from Pueblo Reservoir, Colorado, USA.
83.3.7 Supplementary Material 4.pdf (45 kB)
Pueblo Reservoir walleye identification label, sex, otolith age, total length, total mass, and date of capture.
83.3.7 Supplementary Material 5.pdf (170 kB)
Composite list of phytoplankton species recorded monthly from January through September from Pueblo Reservoir, Colo rado, USA.
83.3.7 Supplementary Material 6.pdf (42 kB)
Composite zooplankton species recorded monthly from January through September from Pueblo Reservoir, Colo - rado, USA.
83.3.7 Supplementary Material 7.pdf (31 kB)
LA-ICP-MS Se limits of detection ppm for Pueblo Reservoir walleye otoliths.