Great Basin Naturalist


Published fish blood parameters are limited to commercially cultured species (e.g. rainbow trout [Oncorhynchus mykiss] and channel catfish [Ictalurus punctatus]). However, as walleye (Stizostedion vitreum) and other fish increase in value to the angler, hatchery and fish managers will require data on these species. Blood sera were collected from live walleye in the field, creatinine values were determined colorimetrically, and health range values were established from these data. Creatinine levels of walleye serum (0.06–0.72 mg/dl) were higher in three species but lower than recognized in a recent catfish study. Creatinine levels may be important in predicting diseases in which the kidney is adversely affected.