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Mortality and recruitment mechanisms affecting early life stages of lake sturgeon in Lake Michigan

The extent to which mortality mechanisms impact lake sturgeon early   life stages and limit recovery efforts remain unknown. For   rehabilitation to be successful, an understanding of the   relationship among mortality and recruitment factors acting on lake   sturgeon populations is necessary.     For this study, researchers will examine the following objectives:   (1) estimate egg density, production of larvae during the drift   period, and the abundance of age-  juvenile lake sturgeon prior to   river emigration in the lower Peshtigo River;   (2) identify and quantify the mechanisms of mortality during each   lake sturgeon life stage;   (3) determine if predation on age-  life stages is dependent upon   lake sturgeon body size; and   (4) assess how mortality sources influence recruitment dynamics,   year-class strength, and population viability of lake sturgeon.     This research will directly increase our understanding of the   mechanisms regulating recruitment dynamics of lake sturgeon in the   Lake Michigan basin and help to identify mortality sources that may   negatively impact ongoing and future recovery efforts for this   species throughout the Great Lakes basin.    (sturgeon); (lake sturgeon); (Acipenser fulvescens); (Lake Michigan)

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field Investigation
Scale of Phenomena
Organism
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Michigan

The Great Lakes - St. Lawrence Research Inventory is an
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up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.