Assessments

Commercial Harvest Assessments

The GLFP has collected information on the harvest of Great Lakes fishes since 1995 and has reported changes in the composition of fish harvested in the management units in which LTBB fishermen are active.  Historically, fishing effort has primarily been focused in two Lake Michigan management units in close proximity to the Reservation- WFM04 and WFM05 (see map).

In addition to summarizing commercial and subsistence harvest data, the GLFP collects specific biological information from fish harvested by commercial fishermen.  Data collected include age, length, weight, sex, maturity, sea lamprey wounding, and fish health indices.

Fishery Assessments

Currently, the GLFP participates in two standardized surveys- the spring Lakewide Assessment Plan (LWAP) for Lake Michigan and the Fishery-Independent Whitefish Survey (FIWS).

Lake Trout Spawning Assessments

Lake trout spawning assessments are conducted to determine the effectiveness of lake trout stocking strategies in re-colonizing historically important spawning reefs in northern Lake Michigan.  Since 1999, the GLFP has conducted fall sampling at 2-4 reefs each year.

Use of the Data

Data collected from fishery and commercial assessments are used to model abundance, biomass, and a number of other biological variables associated with lake trout and lake whitefish populations. Estimates yielded by the models inform management of both fisheries.