On Evaluating Measures to Rehabilitate Lake Trout (<i>Salvelinus namaycush</i>) of Lake Superior

Lawrie, A. H.; MacCallum, Wayne R.

doi:10.1139/f80-246

Cited by 12 publications

(3 citation statements)

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“…However, SLIS authors have docunsented that lamprey attacks are not inevitably fatal and that wounding or scarring rates may be very high with little evidence of correlative mortality (Pearce et al 1980: Youngs 1980. In opposition to these results are the observations by Spangler and Collins (1980), Lawrie andMcCalIum (1980B, Budd andFry (1960), and others that mortality is highly correlated with lamprey abundance and wounding rates. Still others indicate that mortality correlates with indices of lamprey abundance but that wounding rates are low (Kitchell and Breck 1980).…”

Section: Origin and Spread Of Sea Lampreys Throughout The Great Lakesmentioning

confidence: 87%

Sea Lamprey (Petromyzon marinus) Control — Where to From Here? Report of the SLIS Control Theory Task Force

Lamsa¹,

Rovainen²,

Kolenosky³

et al. 1980

Can. J. Fish. Aquat. Sci.

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Sea lamprey (Petromyzon marinus) control with selective toxicants has reduced sea lamprey abundance in the Great Lakes to levels which permit survival of desirable fish species, but development of alternate and supplemental control methods is essential since chemicals cannot be used indefinitely. The Task Force addressed hypotheses which relate to regulation of sea lamprey numbers during different life history stages and why sea lampreys appear to affect fish stocks differently in various bodies of water. Examination of the information about the various factors that control sea lamprey abundance, both natural and man-made, permitted the Task Force to develop several hypotheses and to indicate areas where additional emphasis or research could produce new or supplementary control methods. Efforts to develop an integrated program of sea lamprey control should be accelerated by development of present promising areas as well as expansion in new directions. Sea lampreys when compared with teleosts exhibit many features of a prototype vertebrate and some unique specializations. Physiological, biochemical, or behavioral differences between lampreys and teleosts may be exploitable for developing control techniques specific to sea lampreys.Key words: sea lamprey, Great Lakes, population control, barrier dams, integrated pest management, buffer species, physiology, teleosts

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Section: Origin and Spread Of Sea Lampreys Throughout The Great Lakesmentioning

confidence: 87%

Sea Lamprey (Petromyzon marinus) Control — Where to From Here? Report of the SLIS Control Theory Task Force

Lamsa¹,

Rovainen²,

Kolenosky³

et al. 1980

Can. J. Fish. Aquat. Sci.

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“…Since 1965, large numbers of S. namaycush raised in hatcheries have been stocked in an effort to rehabilitate this native species (Holey et al , 1995), but these efforts have failed to yield substantial numbers of naturally produced offspring. Possible impediments to successful recruitment of S. namaycush include insufficient broodstock (Lawrie & MacCallum, 1980), diminished spawning habitat (Sly, 1988), predation on eggs and alevins (Krueger et al , 1995), contaminants (Hickey et al , 2006) and nutritional deficiencies (Fitzsimons, 1995). Among these suspected impediments is nutritional deficiency associated with inadequate levels of thiamine (vitamin B 1 ) that results in high mortality of yolk sac and swim‐up stages of salmonines in the Great Lakes (Fitzsimons, 1995).…”

Section: Introductionmentioning

confidence: 99%

Does spatial variation in egg thiamine and fatty‐acid concentration of Lake Michigan lake trout Salvelinus namaycush lead to differential early mortality syndrome and yolk oedema mortality in offspring?

Czesny¹,

Rinchard²,

Lee³

et al. 2012

Journal of Fish Biology

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Individual variation in fatty-acid and thiamine concentrations were determined in lake trout Salvelinus namaycush eggs collected at two spawning grounds in Lake Michigan. A suite of predictor variables, including spawning location, egg fatty-acid and thiamine concentrations, were used to attempt to explain cause-and-effect in early life stage mortality among S. namaycush families. Lipid and fatty-acid composition of S. namaycush eggs differed between spawning locations. Salvelinus namaycush offspring from south-western Lake Michigan were affected by a high occurrence of yolk oedema, whereas a higher frequency of early mortality syndrome (EMS) was observed among offspring from the north-western part of the lake. Random-forest regressions revealed location as the most influential predictor of yolk oedema mortality, whereas thiamine level in eggs was the strongest predictor of EMS-related mortality. Several polyunsaturated fatty acids were also found to be predictors of both mortalities. There is evidence of spatial variability in egg fatty-acid concentration among S. namaycush in Lake Michigan that, together with diminished thiamine concentration, contribute to low survival of S. namaycush progeny.

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“…However, Heist and Swenson (I9S3) warned that rainbow smell production was not high enough to support the fisheries or predator populations previously supported by lake herring. Subsequent rehabilitation programs included harvest restrictions on lake herring and lake trout, sea lamprey control, and lake trout stocking (Lawrie and MacCallum 1980;Walters et al 1980;Busiahn 1990). Primary objectives stated by the Great Lakes Fishery Commission for Lake Superior were to rehabilitate lake trout and lake herring stocks and to maintain a predator-prey balance that would allow normal growth of lake trout (Hansen 1990).…”

mentioning

confidence: 99%

Bioenergetics Modeling as a Salmonine Management Tool Applied to Minnesota Waters of Lake Superior

Negus

1995

North American Journal of Fisheries Management

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Lake Superior's fish community has undergone dramatic changes since the mid‐1950s, with major shifts in the forage base, invasion of exotics, and decline of lake trout Salvelinus namaycush. Predator species have been introduced, and many of these are maintained by stocking. The impact of these stocked fish on the forage base and the ability of the forage base to sustain projected stocking levels are unknown. Bioenergetics modeling is a particularly useful tool for coordinating data to answer questions about predator–prey dynamics, stocking quotas, and forage requirements. This study focused on the Minnesota waters of Lake Superior to gain perspective on the impact of fish stocked by Minnesota and to serve as a basis for future expansion of the analysis to all parts of the lake. The objectives of this study were to compile data on the major salmonines in Minnesota waters of Lake Superior for use in a bioenergetics model, to estimate salmonine predation on prey populations through modeling simulations, and to prioritize data needed for future input to the bioenergetics model. Estimates of consumption by predator stocks in 1989 totaled 3,047 metric tons of rainbow smelt Osmerus mordax and 401 metric tons of coregonines, which greatly exceeded estimates of biomass plus production of prey species. Underestimation of prey fish biomass probably accounts for most of this discrepancy. Recent shifts in the forage base, heavy predation on prey species by stocked fish, and reduced survival of stocked chinook salmon Oncorhynchus tshawytscha suggest that caution should be exercised in future stocking. Further data acquisition should focus on determining prey fish biomass and production, predator age and growth, predator diets, predator population abundances, and mortality rates.

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On Evaluating Measures to Rehabilitate Lake Trout (Salvelinus namaycush) of Lake Superior

Cited by 12 publications

References 0 publications

Sea Lamprey (Petromyzon marinus) Control — Where to From Here? Report of the SLIS Control Theory Task Force

Sea Lamprey (Petromyzon marinus) Control — Where to From Here? Report of the SLIS Control Theory Task Force

Does spatial variation in egg thiamine and fatty‐acid concentration of Lake Michigan lake trout Salvelinus namaycush lead to differential early mortality syndrome and yolk oedema mortality in offspring?

Bioenergetics Modeling as a Salmonine Management Tool Applied to Minnesota Waters of Lake Superior

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