Monster Seminar JAM - Predation by bears on salmon: ecology, behavior and evolution
Dr. Tom Quinn, School of Aquatic and Fishery Sciences, University of Washington
It has long been recognized that brown and black bears prey on and scavenge Pacific salmon but the last two decades have seen a great increase in research into the many aspects of this relationship. This presentation will describe work over the past 20 years on bear salmon interactions, with an emphasis on predation by brown bears on sockeye salmon in the Bristol Bay region of southwestern Alaska. The talk will provide information on the factors controlling the level of predation among streams, and within streams among years, the extent to which the predation is selective, and the possible evolutionary effects of the predation on life history traits of salmon. In addition to this information from the standpoint of the salmon, we will also consider the salmon as prey for the bears, and present information on selective consumption of salmon, and the importance of salmon in the ecology of bears. The presentation will conclude with some comments on the role that bears play in controlling the pathways by which nutrients from dead salmon are transferred to terrestrial and aquatic ecosystems.
Date and Time:
February 3, 2011,
11:00 am - 12:00 pm