Annual production by brook trout in Lawrence Creek during eleven successive years

  • 1974
Madison, Wisconsin: Wisconsin Department of Natural Resources
  • Annual production by the wild brook trout (Salvelinus fontinalis) population in Lawrence Creek, Wisconsin was estimated for 11 consecutive years (1960-70). Production annually by all age groups combined varied only 20 percent (436-526 kg) and averaged 478 kg (11.7 g/m2). Much greater annual variations in annual production occurred within each of the age groups (119 percent range for age 0, 97 percent for age I, and 700 percent for age II) and in all four of the study sections (95 percent in Section A, 44 percent in Section B, 69 percent in Section C, and 176 percent in Section D).