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Otolith microchemistry and microstructure of age-0 silver carp for determining early-life environments and spawning periodicity in the Upper Mississippi River in 2016

Metadata Updated: October 29, 2023

In 2016, for the first time, an abundance of age-0 silver carp (Hypophthalmichthys molitrix) were captured at several sites upstream of Lock and Dam 19 on the Upper Mississippi River near Keokuk, Iowa. These data were collected in an attempt to determine the early life environments and frequency and timing of the reproductive events that led to a large year class of age-0 silver carp. This information is important for informing decisions about control measures. We sampled these fish to determine age (days) and early life environments using their otoliths. Sampled age-0 silver carp were collected from navigation Pools 18 and 19 from July–October 2016 using a variety of sampling gears. We aged these fish by counting daily growth rings on otoliths and used age estimates to determine the timing and frequency of spawning events. Hatch dates were determined from ageing lapilli otoliths from 190 age-0 Silver Carp (16–231 mm). We conducted chemical analyses on the lapilli and asteriscus otoliths from 124 of these silver carp (64–231 mm total length) to determine their early-life environments based on Sr:Ca; Br:Ca, and δ18O of the otoliths. Early-life environments were determined from the otolith microchemistry by using published relations between otolith chemistry and water chemistry of probable early life environments. Water chemistry data was collected as part of other studies and is pending publication on ScienceBase A manuscript that incorporates these data is currently in peer review at a scientific journal.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:6128fe90d34e40dd9c061381
Data Last Modified 20211119
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id ca5cbbfb-33f0-43e9-ab92-459d053a30ad
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -91.7139,40.2753,-90.6592,41.2613
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash ad989f99b79ffa3e39fd66cf2b303821b7068c67e87689241e827c035903dd6a
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -91.7139, 40.2753, -91.7139, 41.2613, -90.6592, 41.2613, -90.6592, 40.2753, -91.7139, 40.2753}

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