Fishidiot wrote:
TJones wrote:
Anybody know about walleye... Are they an introduced species as well?
I believe the walleye was introduced to the Susky watershed (along with pike, muskies, black bass, and channel cats).
JeffK wrote:
I have heard there is some dispute over whether or not walleye were introduced or native to the Suskie. (no dispute over smallies - introduced from the Potomac). Walleyes are native to the Mississippi and Great Lakes drainages, and many of the Great Lakes/Mississippi drainage fish are missing in the Suskie and Delaware watersheds. The debate over whether some of the early mentioned fish are walleyes is complicated by evidence that the Great Lakes drained down the Suskie at one point in the recent glaciation, so the Great Lakes were connected to the Suskie and walleyes could have been introduced then. I think most biologists believe they are introduced, but there is a contrary view.
BTW, as the glaciers moved south they first blocked the St Lawrence so the Great Lakes drained through the Hudson R. When the Hudson was blocked, they drained through the Suskie briefly. The major rivers in the low sea level period carved out large valleys that are now the Hudson Canyon and tidal Hudson and Chesapeake Bay. These are larger than may have been cut by the rivers in their present flow.
JeffK wrote:
I have heard there is some dispute over whether or not walleye were introduced or native to the Suskie. .
JeffK wrote:
I have heard there is some dispute over whether or not walleye were introduced or native to the Suskie. (no dispute over smallies - introduced from the Potomac). Walleyes are native to the Mississippi and Great Lakes drainages, and many of the Great Lakes/Mississippi drainage fish are missing in the Suskie and Delaware watersheds. The debate over whether some of the early mentioned fish are walleyes is complicated by evidence that the Great Lakes drained down the Suskie at one point in the recent glaciation, so the Great Lakes were connected to the Suskie and walleyes could have been introduced then. I think most biologists believe they are introduced, but there is a contrary view.
BTW, as the glaciers moved south they first blocked the St Lawrence so the Great Lakes drained through the Hudson R. When the Hudson was blocked, they drained through the Suskie briefly. The major rivers in the low sea level period carved out large valleys that are now the Hudson Canyon and tidal Hudson and Chesapeake Bay. These are larger than may have been cut by the rivers in their present flow.
Not exactly, they were formed by glaciers yes, but there was also a meteor involved. Same as with the Chesapeake Bay.salmonoid wrote:
JeffK wrote:
I have heard there is some dispute over whether or not walleye were introduced or native to the Suskie. (no dispute over smallies - introduced from the Potomac). Walleyes are native to the Mississippi and Great Lakes drainages, and many of the Great Lakes/Mississippi drainage fish are missing in the Suskie and Delaware watersheds. The debate over whether some of the early mentioned fish are walleyes is complicated by evidence that the Great Lakes drained down the Suskie at one point in the recent glaciation, so the Great Lakes were connected to the Suskie and walleyes could have been introduced then. I think most biologists believe they are introduced, but there is a contrary view.
BTW, as the glaciers moved south they first blocked the St Lawrence so the Great Lakes drained through the Hudson R. When the Hudson was blocked, they drained through the Suskie briefly. The major rivers in the low sea level period carved out large valleys that are now the Hudson Canyon and tidal Hudson and Chesapeake Bay. These are larger than may have been cut by the rivers in their present flow.
Except the Great Lakes didn't exist until AFTER the last glaciation. They were formed as the glaciers retreated...