Evaluation of a stimulus-response method for distinguishing out-migrant salmonids from drifting debris for sonar counts in the Trinity River, CaliforniaT. Brock Stables and George A. KautskyAquat. Living Resour., 13 5 (2000) 341-347DOI: https://doi.org/10.1016/S0990-7440(00)01075-5