Missed Opportunities: U.S. Fishery Biologists and Productivity of Fish in Green Bay, Saginaw Bay and Western Lake Erie

1989 ◽  
Vol 13 (2) ◽  
pp. 32-63
Author(s):  
F. N. Egerton
Keyword(s):  
Lake Erie ◽  
Green Bay ◽  
Missed Opportunities ◽  
Saginaw Bay ◽  
Western Lake ◽  
Western Lake Erie

Walleye (Stizostedion vitreum vitreum) Fluctuations in the Great Lakes and Possible Causes, 1800–1975

1977 ◽  
Vol 34 (10) ◽  
pp. 1878-1889 ◽  
Author(s):  
J. C. Schneider ◽  
J. H. Leach
Keyword(s):  
Great Lakes ◽  
Lake Erie ◽  
Lake Superior ◽  
Lake Huron ◽  
Stizostedion Vitreum ◽  
Spawning Habitat ◽  
Green Bay ◽  
Western Lake ◽  
Foreign Species ◽  
Western Lake Erie

Changes in walleye (Stizostedion vitreum vitreum) stocks in the Great Lakes from 1800 to 1975 were linked to proliferation of foreign species of fish and culturally induced sources of stress — exploitation, nutrient loading, alteration of spawning habitat, and toxic materials. During the 1800s, three small spawning stocks (and probably many others) were damaged or destroyed because of either overfishing or elimination of spawning habitat through logging, pollution, or damming.During 1900–40, stocks in the Michigan waters of Lake Superior, southern Green Bay, the Thunder Bay River of Lake Huron, the North Channel of Lake Huron, and the New York waters of Lake Ontario declined gradually. Pollution, in general, and degradation of spawning habitat, in particular, probably caused three of the declines and overexploitation was suspected in two instances. In addition, the decline of three of these stocks occurred when rainbow smelt (Osmerus mordax) were increasing.During 1940–75, stocks in seven areas declined abruptly: Saginaw Bay (1944), northern Green Bay (1953), Muskegon River (mid-1950s), western Lake Erie (1955), Nipigon Bay (late 1950s), Bay of Quinte (1960), and Black Bay (mid-1960s). The decline of each stock was associated with a series of weak year-classes. The stocks were exposed to various sources of stress, including overexploitation, pollution, and interaction with foreign species, which, if not important in the decline, may be suppressing recovery. Only the western Lake Erie stock recovered, in part due to a reduction in exploitation and, possibly, because of the relatively low density of smelt and alewives (Alosa pseudoharengus) in the nursery areas.Relatively stable stocks persisted in five areas: Wisconsin waters of Lake Superior, Lake St. Clair — southern Lake Huron, eastern Lake Erie, northern Lake Huron, and parts of Georgian Bay. Pollution problems were relatively minor in these areas and exploitation was light during recent decades. Apparently these stocks were more capable of withstanding the additional stresses exerted by alien species. Key words: population fluctuations, Percidae, Stizostedion, Great Lakes walleye, history of fisheries, summary of stresses, harvests, management implications

Historical Changes in Mercury Contamination in Michigan Walleyes (Stizostedion vitreum vitreum)

1975 ◽  
Vol 32 (10) ◽  
pp. 1745-1754 ◽  
Author(s):  
T. M. Kelly ◽  
J. D. Jones ◽  
G. R. Smith
Keyword(s):  
Lake Erie ◽  
Mercury Contamination ◽  
Stizostedion Vitreum ◽  
Saginaw Bay ◽  
The Past ◽  
Bear Lake ◽  
Western Lake ◽  
Low Levels ◽  
Western Lake Erie ◽  
Historical Samples

Mercury concentrations in Michigan walleyes (Stizostedion vitreum vitreum) are more variable among localities than between recent and historical samples within localities. Increases in mercury concentrations were noted in the recent populations of lakes Cadillac and Mitchell, Lake Gogebic, and western Lake Erie. Walleyes in four of seven localities showed no statistically significant increases in the level of mercury contamination over the past 40 yr. Mercury values over 0.5 ppm are common only on Isle Royale, in Saginaw Bay, and in western Lake Erie. Walleyes from Houghton Lake, Bear Lake, and lakes Cadillac and Mitchell show low levels of mercury contamination.Methods for validly comparing preserved and fresh specimens were established by tests to determine the weight loss through dehydration in preservation. In 74% alcohol, muscle tissue of medium to large walleyes dehydrates to about 70% of the fresh weight in the first year.Mercury concentration in walleye muscle from recent and old museum collections is positively correlated with age and size. Considerable variation in concentration exists not only between geographic localities, but within populations, and even within subsamples of the same tissue.

Comparative analysis of Microcystis buoyancy in western Lake Erie and Saginaw Bay of Lake Huron

Harmful Algae ◽  
2021 ◽  
Vol 108 ◽  
pp. 102102
Author(s):  
Paul A. Den Uyl ◽  
Seamus B. Harrison ◽  
Casey M. Godwin ◽  
Mark D. Rowe ◽  
J. Rudi Strickler ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Lake Erie ◽  
Lake Huron ◽  
Saginaw Bay ◽  
Western Lake ◽  
Western Lake Erie

Cyanobacterial bloom phenology in Saginaw Bay from MODIS and a comparative look with western Lake Erie

Harmful Algae ◽  
2021 ◽  
Vol 103 ◽  
pp. 101999
Author(s):  
Timothy T. Wynne ◽  
Richard P. Stumpf ◽  
R. Wayne Litaker ◽  
Raleigh R. Hood
Keyword(s):  
Lake Erie ◽  
Cyanobacterial Bloom ◽  
Saginaw Bay ◽  
Western Lake ◽  
Western Lake Erie

Projected Changes to the Trophodynamics of PCBs in the Western Lake Erie Ecosystem Attributed to the Presence of Zebra Mussels (Dreissena polymorpha)

1998 ◽  
Vol 32 (24) ◽  
pp. 3862-3867 ◽  
Author(s):  
Heather A. Morrison ◽  
Frank A. P. C. Gobas ◽  
Rodica Lazar ◽  
D. Michael Whittle ◽  
G. Douglas Haffner
Keyword(s):  
Dreissena Polymorpha ◽  
Lake Erie ◽  
Zebra Mussels ◽  
Western Lake ◽  
Projected Changes ◽  
Western Lake Erie
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