Lake Sturgeon Spawning Habitat

Hence the restoration of spawning habitat has become a common practice with at least 17 projects completed in the last 20 years.

Lake sturgeon spawning habitat. Spawning initially commenced on 17 June when water temperature reached 15C. Lake Sturgeon spawn in two major tributaries of Lake Nipissing the Sturgeon River and the South River. The loss of spawning habitat has been identified as a limiting factor for population growth of lake sturgeon Acipenser fulvescens a species that is endangered or threatened throughout its range.

Research Methods Sampling of lake sturgeon took place from April October 2000 and March September 2001. Water temperature in the range of 9-15 degrees Celsius. They are a benthic bottom dwelling species that feeds over substrates of mud sand or gravel.

Adult Lake Sturgeon spawn in spring and begin moving to spawning sites when water temperatures are between 8C and 10C. The loss of spawning habitat has been identified as a limiting factor to population growth for lake sturgeon Acipenser fulvescens the most widely distributed species of the family in North. It prefers clean sand gravel or rock bottom areas where food is abundant.

Spawning assessments over the past two decades indicate successful natural recruitment suggesting the possibility of a modest recovery Maraldo 1997. Nine sites located near Grassy Island and Sugar Island had suitable spawning habitat for lake sturgeon. Lake sturgeon spawning at other locations in the Detroit River has never been documented.

2009-05-22 Black Lakes threatened sturgeon got a helping hand May 9 when Huron Pines AmeriCorps members and volunteers helped protect their Black River spawning habitat through erosion control. Summary In 1996 lake sturgeon Acipenser fulvescens spawning was documented for the third consecutive year on an artificially placed gravel bed in the St Lawrence River. Habitat requirements for spawning lake sturgeon.

However there are remaining questions and concerns regarding depth of spawning and potential egg stranding that may impact successful reproduction and recruitment. Habitat and Distribution The lake sturgeon is found primarily in freshwater lakes and large rivers in northeastern North America but can also occur in the brackish waters of Hudson Bay and the St. Based on the 2016 assessment there is suitable spawning habitat along the Magnetawan River for spawning populations of Lake Sturgeon Sucker species and Walleye.