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•This phenomenon not restricted to TB
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•#1 in abundance in 2000 in TB – first confirmed
in fall of 1997 by sport caught fish
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•#1 in abundance in 2000 in Tawas Bay – first
confirmed in 1998
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•#3 in abundance in 2000 at mouth of Saginaw R.
(Essexville) – first confirmed in 1997
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•This trend likely in all new sites and present
major concerns for impacts to fish community
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LaFarge Ship
Channel Corp (first found in 1998)
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2000 Catch: #1 =ROG (100%)
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TOTAL CATCH=12; EFFORT=20.5 M BT
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1999 ROG #1 = 77% OF TOTAL CATCH
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National
Gypsum (first found in 1998)
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2000 Catch: #1 =ROG (86%); 2 =STS
(8%); 3 =WHP (3%); 4 =ALE (3%)
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TOTAL CATCH=100; EFFORT=30 M BT
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1999 ROG #1 = 83% OF TOTAL CATCH
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Saginaw River
(first found in 1997)
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2000 Catch: 1 =FRD (47%); 2 =CHC (36%); 3
=ROG (8%)
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TOTAL CATCH=169; EFFORT=30.5 M BT
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OTHER= GIS (10%), WHP (2%), STS (.5%), QUB
(.5%)
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1999 ROG #3 = 12% OF TOTAL CATCH
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