 Spotlight
On: Fish - we have two objectives in working with fish
on this cruise. The first is to consider what fish morphology
(body and fin shape and the position of the eyes and mouth)
can tell us about the feeding strategies of a particular species.
We have brought a collection of fresh fish on board and will
take a look at them, seeking to deduce some characteristics
of their life history. Second, we are interested in what fish
eat, i.e. their position in the food web. In Lake Superior,
lake trout occupy the top position in the food web. We have
a hundred or so frozen lake trout stomachs with us and our students
will dissect these and examine their contents to find out ‘how
to make a lake trout'.
Return to Cruise |
Fish class lecture
|
Unpacking the fish
|
Dr. Auer is holding a Lake Superior Sucker
|
Dr. Auer shown holding a Lake Superior Burbot |
Whitefish |
Herring |
Participants examine the Lake Superior around the tarp |
Surgery |
Opening fish stomach |
What will we find in fish stomach? |
Flies
and insects that were inside a fish stomach |
Flies
and insects that were inside a fish stomach |
Little fish also found in fish stomach |
Microscope
in RV Lake Guardian lab |
|
Magnified
fish scale
|
See
the Fish Ecology on Deck
WMV 3Mb |
