The Water Resources Division's Surface Water Assessment Section oversees the protection of the quality of surface waters throughout the State of Michigan.
WEIGHT = 4.09 pounds Largemouth Bass Weight. The formula to calculate the weight for a Largemouth Bass that is 20 inches long and has a girth of 15 inches is as follows. Largemouth Bass have a shape factor of 1050. WEIGHT = LENGTH x GIRTH2 / SHAPE FACTOR. WEIGHT= 20 x (152) / 1050.
Largemouth Bass Reproduction Most largemouth bass begin spawning as early as year 2 when they weigh as little as 1lb (454 grams). The spawning season begins in early spring once ice is thawed. The process is dependent on the water temperature being a consistent 60Â°F/15.5Â°C to commence.