It is a good idea to take a peek at the regulations on how to measure both length and girth, know what pictures need to be taken for proof, have a witness verify … Lake sturgeon are a unique fish species in Michigan. Their typical lifespan is 55 years for males and 70 to 100 years for females. Lake sturgeon length at age: Age (years) Length (inches) 1: 11.0: 3: 23.0: 5: 33.0: 10: 40.0: 15: 47.0: 20: 51.0: 25: 56.0: Environmental Concerns. The Lake Sturgeon is a long-lived, slow-growing, late-maturing, fish species that does not do well under heavy exploitation. Range: Freshwater systems of North America from the Hudson Bay through the Mississippi River drainages 3. Siltation, some agricultural practices, and dam construction also reduced habitat availability for the spe… The Russian sturgeon, A. guldenstadtii, is one of the most valuable species inhabiting the rivers of Russia and occurs eastward to Lake Baikal. Lake Sturgeon Length-Girth-Weight Estimation Chart Length is the maximum distance, from the sturgeon’s nose tip to the end of the dorsal lobe of the tail. Girth is the maximum circumference on the sturgeon’s body, usually measured slightly behind the pectoral fins. Preservation of habitat is the single most important factor in maintaining conditions for the survival of the lake sturgeon. Status: Not listed under the Endangered Species Act (ESA). Fishing for sturgeon is allowed on Black Lake in Michigan, for example, but the fishery is limited to five total fish taken each year, each over 36 in (910 mm) and taken through the ice with spears. Taxon: Freshwater Fish 2. Today, limited sturgeon fishing seasons are permitted in only a few areas, including some locations in Minnesota, Wisconsin, and Michigan. Once very common throughout the state, overfishing and pollution in Lake of the Woods and the St. Louis River estuary in the Lake Superior drainage nearly extirpated the Lake Sturgeon (Acipenser fulvescens) from Minnesota. Girth is best measured with a flexible seamstress tape measure. Catch estimates since the early 1890s have declined 99.4%. The MN DNR now has a catch and release record for Lake Sturgeon. Lake sturgeon can grow to weights of up to 200 pounds and lengths of seven feet, with females being longer and heavier than males. Be Ready for that Record Breaking Sturgeon. The length of these fishes is generally to about 3 metres (10 feet); their weight can reach about 227 kg (500 pounds). 1. Lake sturgeon is listed as threatened at the state level in 19 of the 20 states it inhabits.Lake sturgeon (Acipenser fulvescens) is a temperate fish occurring in freshwater systems of North America from the Hudson Bay through the Mis… They are an important biological component of the Great Lakes fish community.