DENSITY-DEPENDENT MULTILEVEL SELECTION IN THE GREAT LAKES SEA ROCKET

Ecology ◽  
2004 ◽  
Vol 85 (1) ◽  
pp. 180-191 ◽  
Author(s):  
Kathleen Donohue
Keyword(s):  
Great Lakes ◽  
Multilevel Selection ◽  
Density Dependent

Responses of Lake Trout (Salvelinus namaycush) to Harvesting, Stocking, and Lamprey Reduction

1980 ◽  
Vol 37 (11) ◽  
pp. 2133-2145 ◽  
Author(s):  
Carl J. Walters ◽  
Greg Steer ◽  
George Spangler
Keyword(s):  
Simple Model ◽  
Policy Analysis ◽  
Great Lakes ◽  
Population Regulation ◽  
Lake Trout ◽  
Normal Population ◽  
Lake Superior ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Density Dependent

Sustained yields, declines, and recovery of lake trout (Salvelinus namaycush) can be explained by a simple model that hypothesizes normal population regulation through density dependent body growth, coupled with depensatory lamprey mortality. The model indicates that either lamprey or fishing alone could have caused the Lake Superior decline, though they apparently operated in concert. The presence of depensatory lamprey mortality leads to a "cliff edge" in the system's dynamics, such that catastrophic changes may be repeated in the future. It is not unlikely that Lake Superior is on the verge of a second collapse. Options for dealing with potential disasters include conservative harvesting policies, development of more sensitive monitoring indicators, and modified stocking policies that may speed the coevolution of a viable lamprey/trout association.Key words: lake trout, sea lamprey, simulation, Great Lakes, policy analysis

The Great Lakes

1896 ◽  
Vol 42 (1072supp) ◽  
pp. 17142-17142
Keyword(s):  
Great Lakes

The “Halibut” of the Great Lakes

1886 ◽  
Vol 22 (555supp) ◽  
pp. 8866-8867
Author(s):  
G.Archie Stockwell
Keyword(s):  
Great Lakes
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