The Environmental Evaluation Work Group FY 1979 Studies of the Winter Navigation Demonstration Program
Abstract
The St. Marys River (connecting channel between Lake Superior and Lake Huron) has historically been associated with the harvesting of coregonnies during late fall spawning. Winter navigation and its associated activities could have deleterious affects on the incubating eggs, including excessive sedimentation, localized current alterations, and dislocation of eggs due to vessel induced pore pressure response. A study starting in February of 1979 attempted to locate the spawning grounds of the lake whitefish, Coregonus clupeaformis, and lake herring, Coregonus artedii, and to determine the amount and classification of sediments deposited over these spawning grounds. Proportionately larger amounts of sediments were collected over those identified spawning grounds adjacent to the shipping channel as opposed to sites remote from the shipping channel. Attempts to recover eggs of the above species from the spawning ground were unsuccessful. (rrh)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1979
- Accession Number
- ADA215868
Entities
People
- David J. Behmer
- Gale R. Gleason
- Richard Hook