Health and Condition of Trout in the Norfork Tailwater, Arkansas, Following Hypoxic Periods
Health, feeding, and relative weight of brown (Salmo trutta) and brook trout (Salvelinus fontinalis) were assessed seasonally at 2 sites on the Norfork tailwater, Arkansas, to evaluate effects of hypoxic water discharges from Norfork Dam. The upper site was immediately below Norfork Dam and subject to low (<6 ppm) dissolved oxygen (DO) in water releases during summer and fall. Dissolved oxygen recovers to ≥6 ppm before reaching the downstream control site. During fall, the health of brook and brown trout was significantly lower at the upstream, low DO, site than at the downstream,...
