Interesting to get an overview of the work of Hans Biberhofer and Cory Treen of Environment Canada on October 30th as they worked on substrate mapping in Thunder Bay. This is an effort to characterize Superior’s lake bottom, be it cobble, sand, gravel, etc., especially as it relates to fish habitat, specifially spawning habitat, as preferred by various fish species. This substrate mapping involves the use of GPS, sidescan sonar and video. An overview, in pictorial format, is provided below.
See all the photos at: