Dr. Dave Beauchamp shares what is known about Lake trout, Kokanee salmon and Mysid shrimp interactions in the open water (pelagic zone) of Lake Tahoe based on past research and also describes the U.S. Fish and Wildlife Service efforts to fill in information gaps related to the Kokanee salmon, Mysid shrimp, and Lake Tahoe zooplankton. He describes how seasonal changes in environmental conditions, food supply, predation and competition between these species influence a potential niche for Lahontan cutthroat trout. (#24677)