AUTHORS: Shane Bush, Missouri Department of Conservation
ABSTRACT: Lake Taneycomo was built in 1913 and is Missouri's oldest hydroelectric reservoir. The lake is riverine in nature, 22 miles in length and encompasses 2,080 surface acres. Prior to 1958, Lake Taneycomo supported one of Missouri's best warm-water fisheries. This changed in 1958 when Table Rock Dam, located in the headwater of Lake Taneycomo, began discharging cold hypolimnetic water into Lake Taneycomo. The discharge of cold water changed Lake Taneycomo into a cold-water environment, providing optimal conditions for trout. Rainbow trout were first stocked into Lake Taneycomo in 1958 and brown trout were first stocked in 1980. By the late 1960s, largely through the introduction of Gammarus pseudolimnaeus, rainbow trout were exhibiting growth rates up to 0.7 inch per month. Large rainbow trout were abundant, and the lake quickly earned a national reputation for producing trophy rainbow trout. By 1986, the G. pseudolimnaeus population had declined by approximately 90% and few rainbow trout larger than stocking size were present. This prompted an extensive 8-year study by MDC that led to regulation changes in 1997. These regulations have had a positive impact on both electrofishing and angler catch rates, as well as size structure of rainbow trout lakewide since they were implemented. At present day, 560,000 rainbow trout and 15,000 brown trout are stocked into the lake annually, making Lake Taneycomo Missouri's largest and most popular trout fishery. Additional work is currently being conducted to evaluate stockings of a new strain of brown trout into the lake, including triploid brown trout which resulted in two new state record brown trout being caught in 2019.
