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Identification of Life History Variation in Salmonids Using Otolith Microchemistry and Scale Patterns: Implications for Illegal Introductions and for Whirling Disease in Missouri River Rainbow Trout: Author: Munro, Andrew Roy; Date: 2004-05-15; Program: Fish and Wildlife Biology; Abstract: Proper conservation and management of wild salmonid populations requires correct identification of the array of life histories present and their contribution to adult recruitment. I used otolith microchemistry to identify natal origin and scale patterns to determine outmigration age in Missouri River rainbow trout where whirling disease could potentially cause a population collapse. First, I reviewed the otolith microchemistry literature and concluded that there have been a limited number of freshwater studies, and there has been limited rigorous testing of the many instruments used. Second, I...; Download File | View full details