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Are Thiamine Levels in Lake Whitefish Eggs in the Upper Great Lakes Lower in Fish that Consume Dreissenid Mussels?

Thiamine Deficiency Complex (TDC) results in low egg thiamine levels   and reduced reproductive success of Great Lakes salmonines.  TDC is   caused by a diet composed of a high proportion of alewife, which   contain thiaminase, and may be partially responsible for low levels   of natural reproduction by lake trout in the Great Lakes.  Recent   research indicates that invasive dreissenid mussels from the Great   Lakes have extremely high thiaminase activities.  Because lake   whitefish are known to consume dreissenids in the Great Lakes, there   is potential for TDC to affect whitefish reproduction.  If the   consumption of dreissenid mussels by lake whitefish leads to reduced   egg thiamine, one would expect to find lower levels of egg thiamine   in lake whitefish from lakes Michigan and Huron than in Lake   Superior, where dreissenid mussels are not present.  We propose to   test the hypotheses that egg thiamine levels in lake whitefish are   reduced in lakes Michigan and Huron compared to Lake Superior, and   that lower egg thiamine levels are associated with the consumption of   dreissenid mussels.

Status
In progress
Type
Project
Start Date
End Date
Researchers
Donald TillittPrincipal Investigator
Associated with 2 projects
Mark EbenerResearcher
Associated with 3 projects
Mark EbenerResearcher
Associated with 3 projects
Jacques RinchardResearcher
Associated with 3 projects
Agencies
Great Lakes Fishery Commission $ 9,676.00USDActual

Funding 54 projects for a total of $5,089,137.00
Scope of Study
Field Investigation
Scale of Phenomena
Biochemical
Organism
Population
Impact of Pollutants
Exotic Species
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Huron
Lake Michigan
State Province
Michigan
Biology And Life History
Population Dynamics
Ecosystem Effects
Food Web Structure
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
General
Annex
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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