Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles

Abstract Background Reproducing populations of invasive carps (Hypophthalmichthys spp.) could alter aquatic food webs and negatively affect native fishes in the Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN). However, proposed invasive carp ba...

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Autores principales:	Jeffrey R. Ziegeweid, Michelle R. Bartsch, Lynn A. Bartsch, Steven J. Zigler, Robert J. Kennedy, Seth A. Love
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	Fin ray microchemistry Stable isotopes Fatty acids Lake sturgeon St. Croix River Mississippi River Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/26c5ee816f404d548e34b5aa0784fb28
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spelling	oai:doaj.org-article:26c5ee816f404d548e34b5aa0784fb282021-11-28T12:13:54ZAssessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles10.1186/s13717-021-00344-y2192-1709https://doaj.org/article/26c5ee816f404d548e34b5aa0784fb282021-11-01T00:00:00Zhttps://doi.org/10.1186/s13717-021-00344-yhttps://doaj.org/toc/2192-1709Abstract Background Reproducing populations of invasive carps (Hypophthalmichthys spp.) could alter aquatic food webs and negatively affect native fishes in the Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN). However, proposed invasive carp barriers may also threaten populations of native migratory fishes by preventing movements of fish between rivers that are necessary for life history requirements. In this study, nonlethal chemical techniques were used to provide baseline data related to the condition, trophic position, and migratory histories of lake sturgeon (Acipenser fulvescens) captured in the Mississippi and St. Croix Rivers. Results Fish length and weight measurements and age estimates determined from pectoral fin rays demonstrated that lake sturgeon from the Mississippi River had greater lengths-at-age compared to sturgeon from the St. Croix River. However, length–weight relations were similar for sturgeon from the Mississippi and St. Croix Rivers. Lake sturgeon captured from different locations had distinguishable fatty acid signatures, and stable isotope analyses demonstrated that lake sturgeon from the Mississippi River generally feed at a higher trophic level than those in the St. Croix River. Strontium-to-calcium ratios (Sr:Ca) from fin ray cross sections indicated that sturgeon captured from the Mississippi River had higher Sr:Ca values than sturgeon captured from the St. Croix River, and natal origins and capture locations were not significantly different among sturgeon captured within individual rivers. Most sturgeon were captured in water with a similar Sr:Ca signature as their natal waters, indicating that there is some separation between populations of lake sturgeon in the St. Croix and Mississippi Rivers. However, Sr:Ca data indicated substantial variation in movement patterns among individual lake sturgeon, indicating that populations interact through migrations of individual fish between rivers. Conclusions Study results provide baseline condition and food web structure index data for assessing changes in lake sturgeon populations should invasive carps become established in these areas of the Mississippi and St. Croix Rivers. Controlled-exposure and telemetry studies would help verify and enhance the relations between Sr:Ca signatures in water and lake sturgeon pectoral fin rays to further assess mixing of sturgeons between rivers.Jeffrey R. ZiegeweidMichelle R. BartschLynn A. BartschSteven J. ZiglerRobert J. KennedySeth A. LoveSpringerOpenarticleFin ray microchemistryStable isotopesFatty acidsLake sturgeonSt. Croix RiverMississippi RiverEcologyQH540-549.5ENEcological Processes, Vol 10, Iss 1, Pp 1-22 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Fin ray microchemistry Stable isotopes Fatty acids Lake sturgeon St. Croix River Mississippi River Ecology QH540-549.5
spellingShingle	Fin ray microchemistry Stable isotopes Fatty acids Lake sturgeon St. Croix River Mississippi River Ecology QH540-549.5 Jeffrey R. Ziegeweid Michelle R. Bartsch Lynn A. Bartsch Steven J. Zigler Robert J. Kennedy Seth A. Love Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
description	Abstract Background Reproducing populations of invasive carps (Hypophthalmichthys spp.) could alter aquatic food webs and negatively affect native fishes in the Mississippi National River and Recreation Area (MISS) and the St. Croix National Scenic Riverway (SACN). However, proposed invasive carp barriers may also threaten populations of native migratory fishes by preventing movements of fish between rivers that are necessary for life history requirements. In this study, nonlethal chemical techniques were used to provide baseline data related to the condition, trophic position, and migratory histories of lake sturgeon (Acipenser fulvescens) captured in the Mississippi and St. Croix Rivers. Results Fish length and weight measurements and age estimates determined from pectoral fin rays demonstrated that lake sturgeon from the Mississippi River had greater lengths-at-age compared to sturgeon from the St. Croix River. However, length–weight relations were similar for sturgeon from the Mississippi and St. Croix Rivers. Lake sturgeon captured from different locations had distinguishable fatty acid signatures, and stable isotope analyses demonstrated that lake sturgeon from the Mississippi River generally feed at a higher trophic level than those in the St. Croix River. Strontium-to-calcium ratios (Sr:Ca) from fin ray cross sections indicated that sturgeon captured from the Mississippi River had higher Sr:Ca values than sturgeon captured from the St. Croix River, and natal origins and capture locations were not significantly different among sturgeon captured within individual rivers. Most sturgeon were captured in water with a similar Sr:Ca signature as their natal waters, indicating that there is some separation between populations of lake sturgeon in the St. Croix and Mississippi Rivers. However, Sr:Ca data indicated substantial variation in movement patterns among individual lake sturgeon, indicating that populations interact through migrations of individual fish between rivers. Conclusions Study results provide baseline condition and food web structure index data for assessing changes in lake sturgeon populations should invasive carps become established in these areas of the Mississippi and St. Croix Rivers. Controlled-exposure and telemetry studies would help verify and enhance the relations between Sr:Ca signatures in water and lake sturgeon pectoral fin rays to further assess mixing of sturgeons between rivers.
format	article
author	Jeffrey R. Ziegeweid Michelle R. Bartsch Lynn A. Bartsch Steven J. Zigler Robert J. Kennedy Seth A. Love
author_facet	Jeffrey R. Ziegeweid Michelle R. Bartsch Lynn A. Bartsch Steven J. Zigler Robert J. Kennedy Seth A. Love
author_sort	Jeffrey R. Ziegeweid
title	Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
title_short	Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
title_full	Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
title_fullStr	Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
title_full_unstemmed	Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
title_sort	assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the st. croix and mississippi rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/26c5ee816f404d548e34b5aa0784fb28
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Assessing the migratory histories, trophic positions, and conditions of lake sturgeon in the St. Croix and Mississippi Rivers using fin ray microchemistry, stable isotopes, and fatty acid profiles

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