Thomas Quinn (University of Washington)
Abstract. Predation (or the risk thereof) is among the key ecological interactions between animals, affecting the behavior, ecology, physiology, and evolution of both predators and prey. This presentation will review over two decades of research on predation by bears on Pacific salmon, illustrating some of these processes. I will initially take the perspective of the salmon, considering what controls the number and percent of fish killed among streams and among years in each stream, and then considering the forms of selection resulting from non-random predation. I will then consider the bear's standpoint, considering the patterns of predation and consumption of salmon once caught. Finally, the implications of this relationship will be illustrated, as the bears and salmon play an exceptionally important role in the ecosystems that they occupy. The nature of the presentation is empirical rather than theoretical, but the goal is to stimulate interactions among scientists who might have an interest in such matters.