THE INFLUENCE OF PREY ABUNDANCE AND RISK-SENSITIVE BEHAVIORAL CHANGE ON INDIVIDUAL ACCESS TO HIGH-ENERGY FOOD (SALMON): IMPACTS ON THE DENSITY AND VIABILITY OF BEAR POPULATIONS by Owen T. Nevin A dissertation submitted in partial fulfillment of the requirements for the degree DOCTOR OF PHILOSOPHY in Wildlife Ecology Approved: Barrie K. Gilbert Phaedra Budy Major Professor Committee Member Thomas J. Deliberto Frederick D. Provenza Committee Member Committee Member Robert H. Schmidt Thomas Kent Committee Member Dean of Graduate Studies UTAH STATE UNIVERSITY Logan, Utah 2003