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Completed projects

Minckley Library is Online

The late W.L. Minckley, Professor of Life Sciences, Arizona State University, Tempe, amassed an extensive reprint library during his four-decade-long professional career, …

Imperial Ponds Native Fish Monitoring

Status: Ongoing

A series of ponds were constructed adjacent to the river on the U.S. Fish and Wildlife Service Imperial National Wildlife Refuge (INWR). These ponds were built to provide off-channel habitat free of nonnative fishes for the survival and reproduction of bonytail and razorback sucker. Marsh & Associates was contracted to conduct a three-year project to determine the suitability of these ponds for native fishes

Survival of Razorback Sucker Stocked into the lower Colorado River

Status:  Completed

Razorback sucker have been stocked into the lower Colorado River for nearly 30 years, but stocking was accelerated in recent years to meet requirements of a U.S. Fish and Wildlife Service Biological Opinion of lower river operations (USFWS 1997).  The purpose of this project was to assess survival of stocked fish by performing an intensive, opportunistic survey that targeted razorback sucker in approximately 282 km of river from Parker Dam downstream to Yuma.