Results Search Electronic Theses and Dissertations (ETDs)

Competition potential between sauger and walleye in non-native sympatry: historical trends and resource overlap in the Middle Missouri River, Montana: Author: Bellgraph, Brian Joseph; Date: 2006-05-15; Program: Fish and Wildlife Management; Abstract: Sauger Sander canadensis populations throughout Montana and North America have exhibited declines over the past few decades. Sauger population abundance declined in the middle Missouri and Yellowstone rivers of Montana in the mid-1980s following a period of drought. Higher flows resulted in a rebound of the lower Yellowstone River population; however, the middle Missouri River population has remained at low abundance. Various factors may contribute to the reduced population abundance of sauger in the middle Missouri River, including interspecific competition with walleye Sander vitreus. Histor...; Download File | View full details

Interactions among hybrid striped bass, white bass, and walleye in Harlan County Reservoir: Author: Olson, Nathan William; Date: 2004-08-15; Program: Fish and Wildlife Management; Abstract: Walleye Sander vitreus, white bass Morone chrysops, and hybrid striped bass M. chrysops x M. saxatilis are common top-level predators in Midwestern reservoirs. However, the ecology and interactions among these species are not well understood. Therefore, I compared the food habits, diet breadth, diet overlap, isotopic composition, vertical distribution, and vertical overlap of these species in Harlan County Reservoir, Nebraska, during the months of June through September 2002 and 2003. In addition, prey selection of hybrid striped bass for walleye and golden shiner Notemigonus crysoleucas was e...; Download File | View full details