Monster Seminar JAM - Thiamine deficiency in Great Lakes salmonines: Causes and consequences
Dr. Donald Tillitt, Columbia Environmental Research Center, U.S. Geological Survey, Department of Interior
Thiamine, the essential vitamin B1, has limited recovery of certain populations of salmon and trout in the Great Lakes. Early mortality syndrome (EMS), a specific fry mortality, which was first observed in the late twentieth century in Great Lakes salmonines and in Baltic Sea salmon in 1974 (known as M74 Syndrome), has been linked to thiamine deficiency. Over the past decade significant strides have been made in our understanding of this perplexing problem. Thiamine deficiency causes embryonic mortality in salmonids and is considered the limitation to self-sustaining populations in some of the lower Great Lakes. Both overt mortality and secondary effects of thiamine deficiency are observed in juvenile and adult animals. Collectively the morbidity and mortality (fry and adult mortality, secondary metabolic and behavior affects in juveniles and adult fish) are referred to as Thiamine Deficiency Complex (TDC). Our work has been aimed at characterization of this syndrome, understanding the underlying causes, and estimation of the consequences of TDC to salmonine populations.
Date and Time:
March 3, 2011,
11:00 am - 12:00 pm