While specifically targeting this protected species is prohibited, it is also important for anglers to avoid any accidental captures of eastern freshwater cod in winter when they are developing their roe (eggs), or in early spring when spawning is occurring, as research indicates this results in resorbed roe or abandoned nests, respectively, and a failed spawning effort. (The eggs in abandoned nests are rapidly consumed by shrimp, turtles and small fish.) A total fishing closure is in effect on the Mann and Nymboida Rivers and their tributaries between August and October each year specifically to prevent this.