Monster Seminar JAM - Winter ecology of Pacific salmon during their marine life
Dr. Marc Trudel
Overwinter survival of juvenile salmon during their first year at sea has been recognized as an important factor limiting the recruitment of salmon and has been linked to lipid and energy dynamics. As a result of low prey productivity, salmon often face food shortages during winter and must rely on the lipids accumulated during summer to fuel their metabolic functions. Hence, overwinter survival of salmon is expected to be influenced by the quantity of lipids stored prior to and utilized during winter. Since small salmon have higher metabolic rates and lower lipid reserves than large salmon, small salmon are expected to deplete their lipids faster and to sustain higher mortality during winter than large salmon. An understanding of the factors contributing to salmon mortality during a critical period in the life cycle of salmon may thus enhance our ability to forecast the marine survival and return of Pacific salmon. Here, I assess the extent of size-selective mortality and energy depletion in juvenile coho and Chinook salmon during their first winter at sea.
University of Washington
The Old Fisheries Center Auditorium (rm 201)
Date and Time:
February 15, 2007,
11:00 am - 12:30 pm