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The 1962 rotenone treatment of the Green River in southwestern Wyoming and northeastern Utah was planned to depress populations of undesirable fish species, primarily common carp (Cyprinus carpio), before closure of Flaming Gorge Dam (1962), and upstream Fontenelle Dam (1964). Pre-treatment surveys catalogued fish and aquatic insect communities, distributions of native and introduced fishes, and aquatic habitat. Near-term, post-treatment evaluations documented the effects of rotenone treatment on the aquatic fauna. Long-term, post-treatment assessments gauged development of sport fisheries for introduced rainbow trout (Oncorhynchus mykiss) and followed the status of native fishes and aquatic insect fauna. Fisheries...
Mechanical predator removal programs have gained popularity in the United States and have benefited the recovery of several native trout and spring fish. These successes have been limited to headwater streams and small, isolated ponds or springs. Nevertheless, these same approaches are being applied to large river systems on the belief that any degree of predator removal will somehow benefit natives. This attitude is prevalent in the Colorado River mainstem where recovery and conservation programs are struggling to reverse the decline of four endangered fish species. Predator removal and prevention are major thrusts of that work but unfortunately, after 10 years and the removal of >1.5 million predators, we have...
Categories: Publication; Types: Citation, Journal Citation; Tags: Fisheries
The 1962 rotenone treatment of the Green River in southwestern Wyoming and northeastern Utah was planned to depress populations of undesirable fish species, primarily common carp (Cyprinus carpio), before closure of Flaming Gorge Dam (1962), and upstream Fontenelle Dam (1964). Pre-treatment surveys catalogued fish and aquatic insect communities, distributions of native and introduced fishes, and aquatic habitat. Near-term, post-treatment evaluations documented the effects of rotenone treatment on the aquatic fauna. Long-term, post-treatment assessments gauged development of sport fisheries for introduced rainbow trout (Oncorhynchus mykiss) and followed the status of native fishes and aquatic insect fauna. Fisheries...