scholarly journals Commercial Fishing on the Great Lakes: Resource Management and Technological Efficiency

1987 ◽  
Vol 11 (1) ◽  
pp. 3
Author(s):  
A. B. McCullough
Keyword(s):  
Resource Management ◽  
Great Lakes ◽  
Commercial Fishing ◽  
Technological Efficiency

scholarly journals Eurasian tench (Tinca tinca): the next Great Lakes invader

2018 ◽  
Vol 75 (2) ◽  
pp. 169-179 ◽  
Author(s):  
Sunčica Avlijaš ◽  
Anthony Ricciardi ◽  
Nicholas E. Mandrak
Keyword(s):  
Great Lakes ◽  
Algal Growth ◽  
Water Clarity ◽  
Ecological Impacts ◽  
Commercial Fishing ◽  
Tinca Tinca ◽  
Benthic Fishes ◽  
Tench Tinca Tinca ◽  
Natural Dispersal ◽  
St Lawrence River

A globally invasive fish, Eurasian tench (Tinca tinca) is spreading through the St. Lawrence River and poses an imminent invasion threat to the Great Lakes. Following its illegal release into a tributary of the St. Lawrence River in 1991, tench has spread throughout the river’s main stem over the past decade, and its abundance in commercial fishing bycatch in the river has grown exponentially. The tench is a generalist benthic consumer with largely undocumented ecological impacts in North America. Reports from other invaded regions indicate that it can compete with other benthic fishes, host a diverse assemblage of parasites and pathogens, degrade water clarity in shallow lakes, limit submerged macrophyte growth, reduce gastropod populations, and promote benthic algal growth through top-down effects. Risk assessments and climate-match models indicate that the Great Lakes are vulnerable to tench invasion, and they signal the need for timely comprehensive actions, including development and implementation of monitoring and rapid-response protocols, including prevention or slowing of natural dispersal through canals.

Benefits and Costs of Sea Lamprey (Petromyzon marinus) Control in the Great Lakes: Some Preliminary Results

1980 ◽  
Vol 37 (11) ◽  
pp. 2169-2174 ◽  
Author(s):  
Daniel R. Talhelm ◽  
Richard C. Bishop
Keyword(s):  
Cost Analysis ◽  
Great Lakes ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Commercial Fishing ◽  
Benefit Cost Analysis ◽  
Fishery Economics ◽  
Benefit Cost ◽  
Benefits And Costs ◽  
Economic Studies

While economic studies of the Great Lakes fisheries are still in their infancy, evidence is accumulating which suggests that efforts to rehabilitate the salmonid fisheries of the Great Lakes, including sea lamprey control, are paying rich dividends; benefits may exceed costs by half a billion dollars each year. Sportfishing values are much greater than commercial fishing values, so anglers benefit most from sea lamprey control. Expanding rehabilitation efforts in ways that will enhance angler success may also be economically sound. PCB levels in Great Lakes salmonids may be lowering the value of angling; 30% of anglers surveyed report eating less of their catch as a result of warnings. However, 93% oppose discontinuing stocking because of the PCB problem. The effects of possible energy shortages are difficult to predict, and may not necessarily reduce Great Lakes fisheries values.Key words: sea lamprey, benefit–cost analysis, fishery economics, recreation economics

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