Fieldwork Photos Side Scanning, Assessing Population Viability of the Eastern Sand Darter Flow Measurement, Assessing Population Viability of the Eastern Sand Darter Fish Processing, Assessing Population Viability of the Eastern Sand Darter Fish Sorting, Assessing Population Viability of the Eastern Sand Darter Fin clip, Assessing Population Viability of the River Redhorse Counting lateral line scales, Assessing Population Viability of the River Redhorse Fish processing, CREP Aquatic Life Monitoring Macroinvertebrate sampling, CREP Aquatic Life Monitoring Macroinvertebrate sampling with D-frame net, CREP Aquatic Life Monitoring Scale sampling, Assessing Population Viability of the Eastern Sand Darter Measuring water quality, CREP Aquatic Life Monitoring Seining, Assessing Population Viability of the Eastern Sand Darter Seining, Assessing Population Viability of the Eastern Sand Darter Marking temperature logger, Assessing Population Viability of the Eastern Sand Darter Backpack electrofishing, CREP Aquatic Life Monitoring Backpack electrofishing, CREP Aquatic Life Monitoring