David Ward

U.S. Geological Survey
Grand Canyon Monitoring and Research Center
Flagstaff, AZ
USA 86001

Papers:
M-116-5 Use of Ultrasonic Imaging to Evaluate Egg Maturation of Humpback Chub Gila cypha in the Grand Canyon M-120-8 Standardized Monitoring of Native and Nonnative Fishes in the Colorado River in Glen and Grand Canyons, AZ T-105-8 Development of a Non-Lethal Tool to Assess the Physiological Condition of Endangered Fish Species in Grand Canyon, USA T-120-4 Assessing Trends in Fish Communities within and between Several Large US River Systems