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Thiamine concentrations in lake trout eggs collected from the Great Lakes in 2019-20


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Tillitt, D.E., Alberts, J.R., and Rinchard, J., 2021, Thiamine concentrations in lake trout eggs collected from the Great Lakes in 2019-20: U.S. Geological Survey data release,


Text files containing data regarding attributes of lake trout egg thiamine concentrations from sites in lakes Huron and Michigan collected during 2019-20, sampling site locations and quality assurance quality control values for comparison to previous years (2017-18) lake trout egg thiamine concentrations.


Point of Contact :
Donald E Tillitt
Originator :
Donald E Tillitt, Jessica R Alberts, Jacques Rinchard
Metadata Contact :
CERC Data Managers
Publisher :
U.S. Geological Survey
SDC Data Owner :
Columbia Environmental Research Center
USGS Mission Area :
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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Lake Trout sampling sites 2019-20.txt 1.36 KB text/plain
Thiamine concentration quality control .txt 582 Bytes text/plain
Thiamine concentrations in Lake Trout eggs.txt 18.58 KB text/plain
Standard Sampling Sites 2021.pdf 329.86 KB application/pdf


The U.S. Geological Survey has coordinated monitoring of thiamine concentrations in lake trout (Salvelinus namaycush) eggs from lakes Huron and Michigan in cooperation with state and federal natural resource agencies and tribal communities since the late 1990s. These data have been reported annually to the Great Lakes Fish Commission’s Fish Health Committee to help understand the threat posed by thiamine deficiency complex (TDC) on lake trout populations. TDC may be an impediment to natural reproduction by lake trout in the Great Lakes and may be an obstacle to lake trout restoration, and egg thiamine concentrations greater than 4-8 nmol/g have been recommended for successful lake trout reproduction. Continued annual monitoring is recommended to evaluate the effects of TDC on lake trout reproduction.



  • Columbia Environmental Research Center (CERC)
  • USGS Data Release Products



Directly entered by Columbia Environmental Research Center

Additional Information


Type Scheme Key
DOI doi:10.5066/P9I4CZI7

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