Model selection results for highest ranked candidate models correlating annual mean catch per unit area (CPUA; number/m2) of age-0 Macrhybopsis in the Upper Missouri River (2004–2010, 2012–2016) from six variables. Variables included in the model selection process are median June–August discharge (m3/s) in the Missouri and Yellowstone rivers; median June–August daily water temperature (°C) for the Upper Missouri River (river kilometer [rkm] 2,814), lower Missouri River (rkm 2,561), and Yellowstone River (rkm 4.0); and estimated total abundance of hatchery-origin Pallid Sturgeon Scaphirhynchus albus (HOPS). (The 0-rkm point was the confluence of the Missouri and Mississippi rivers.) Models contain the variable names and correlative trend (+ or − in parentheses), the number of parameters (K), second-order Akaike's Information Criterion for small sample sizes (AICc), the difference in AICc between the specified model and model containing the lowest AICc (ΔAICc), and the AICc model weight.