Parasites Found in the Sea Lamprey, Petromyzon marinus, from Lake Michigan

1954 ◽  
Vol 40 (3) ◽  
pp. 364 ◽  
Author(s):  
Harry G. Guilford
Keyword(s):  
Lake Michigan ◽  
Petromyzon Marinus ◽  
Sea Lamprey

scholarly journals Dynamics of the Lake Michigan food web, 1970–2000

2002 ◽  
Vol 59 (4) ◽  
pp. 736-753 ◽  
Author(s):  
Charles P Madenjian ◽  
Gary L Fahnenstiel ◽  
Thomas H Johengen ◽  
Thomas F Nalepa ◽  
Henry A Vanderploeg ◽  
...  
Keyword(s):  
Food Web ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Yellow Perch ◽  
Lake Michigan ◽  
Petromyzon Marinus ◽  
Perca Flavescens ◽  
Sea Lamprey ◽  
Alosa Pseudoharengus ◽  
Coregonus Clupeaformis

Herein, we document changes in the Lake Michigan food web between 1970 and 2000 and identify the factors responsible for these changes. Control of sea lamprey (Petromyzon marinus) and alewife (Alosa pseudoharengus) populations in Lake Michigan, beginning in the 1950s and 1960s, had profound effects on the food web. Recoveries of lake whitefish (Coregonus clupeaformis) and burbot (Lota lota) populations, as well as the buildup of salmonine populations, were attributable, at least in part, to sea lamprey control. Based on our analyses, predation by salmonines was primarily responsible for the reduction in alewife abundance during the 1970s and early 1980s. In turn, the decrease in alewife abundance likely contributed to recoveries of deepwater sculpin (Myoxocephalus thompsoni), yellow perch (Perca flavescens), and burbot populations during the 1970s and 1980s. Decrease in the abundance of all three dominant benthic macroinvertebrate groups, including Diporeia, oligochaetes, and sphaeriids, during the 1980s in nearshore waters ([Formula: see text]50 m deep) of Lake Michigan, was attributable to a decrease in primary production linked to a decline in phosphorus loadings. Continued decrease in Diporeia abundance during the 1990s was associated with the zebra mussel (Dreissena polymorpha) invasion, but specific mechanisms for zebra mussels affecting Diporeia abundance remain unidentified.

Changes in Mortality of Lake Trout (Salvelinus namaycush) in Relation to Increased Sea Lamprey (Petromyzon marinus) Abundance in Green Bay, 1974–78

1980 ◽  
Vol 37 (11) ◽  
pp. 2052-2056 ◽  
Author(s):  
J. D. Moore ◽  
T. J. Lychwick
Keyword(s):  
Lake Michigan ◽  
Lake Trout ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Green Bay ◽  
Methods Of Measurement

Increased sea lamprey (Petromyzon marinus) abundance in Green Bay during 1977 is documented utilizing sea lamprey counts and lake trout (Salvelinus namaycush) wounding as methods of measurement. Since lake trout rehabilitation began in 1965, sea lamprey predation has been consistently higher in Green Bay and Northern Lake Michigan than other areas of the lake. It appears that increased sea lamprey predation in Green Bay, above the former high levels, resulted in decreased abundance and increased mortality of lake trout. The increase in lampreys is related to the colonization of the Peshtigo River, Marinette County, Wisconsin.Key words: Green Bay, sea lamprey increases, Peshtigo River, lake trout, increased mortality

Problems with Samples of Sea Lamprey (Petromyzon marinus) Ammocoetes Used in Stock Identification Studies

1984 ◽  
Vol 41 (10) ◽  
pp. 1421-1427 ◽  
Author(s):  
L. D. Jacobson ◽  
R. L. Torblaa ◽  
R. H. Morman
Keyword(s):  
Lake Michigan ◽  
Allelic Variation ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Allelic Frequency ◽  
Frequency Variation ◽  
Starch Gel Electrophoresis ◽  
Stock Identification ◽  
Enzyme Systems ◽  
Hardy Weinberg Equilibrium

Allelic variation in sea lamprey (Petromyzon marinus) ammocoetes from the Lake Huron, Lake Michigan, and Lake Superior drainage basins was studied by starch gel electrophoresis. Previously untried enzyme systems were examined in sea lamprey ammocoetes. No new polymorphic enzyme systems were found. The allelic frequencies of ammocoete samples frequently failed to conform to Hardy–Weinberg equilibrium values. Allelic frequency variation observed among samples from the same drainage was larger than the variation observed among drainages. The results of this study and field observations suggest that the effective size of spawning groups that contribute progeny to samples is often small. These factors make ammocoete samples undesirable for use in stock identification studies.

scholarly journals Forecasting the response of Great Lakes sea lamprey (Petromyzon marinus) to barrier removals

2018 ◽  
Vol 75 (9) ◽  
pp. 1415-1426 ◽  
Author(s):  
Alexander J. Jensen ◽  
Michael L. Jones
Keyword(s):  
Great Lakes ◽  
Lake Michigan ◽  
Evaluation Model ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Strategy Evaluation ◽  
Trade Offs ◽  
Barrier Removal ◽  
Population Effects

A key uncertainty surrounding barrier removals in the Great Lakes is the response of invasive sea lamprey (Petromyzon marinus) populations to realized increases in available habitat for adfluvial species. We addressed this uncertainty by applying a management strategy evaluation model, originally developed to inform sea lamprey management in the Great Lakes, to forecast the effects of barrier removal on Lake Michigan sea lamprey abundances. We used this model to characterize the response to systematically increasing habitat availability and a specific proposed barrier removal. Our results suggest the removals allow novel production from newly opened habitat and, assuming a fixed budget for sea lamprey control, decrease the overall effectiveness of control, leading to disproportionate increases in abundance. The case study demonstrated that evaluating population effects only at the scale of watersheds directly affected by barrier removals would substantially underestimate effects at the scale of Lake Michigan. Similar population responses are possible when evaluating the effects on desired species. Our findings highlight the importance of considering trade-offs for barrier removals and selecting the appropriate scale for forecasting.

A review of sea lamprey (Petromyzon marinus) control in Lake Michigan, 1960-2001

2005 ◽  
pp. 537-558
Author(s):  
D.S. Lavis
Keyword(s):  
Lake Michigan ◽  
Petromyzon Marinus ◽  
Sea Lamprey

Lake Trout (Salvelinus namaycush) and Sea Lamprey (Petromyzon marinus) Populations in Lake Michigan, 1971–78

1980 ◽  
Vol 37 (11) ◽  
pp. 2047-2051 ◽  
Author(s):  
LaRue Wells
Keyword(s):  
Regression Model ◽  
Lake Michigan ◽  
Lake Trout ◽  
Lake Superior ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Combined Effects ◽  
Widespread Application ◽  
Mortality Estimates

Lake trout (Salvelinus namaycush) was exterminated in Lake Michigan by the mid-1950s as a result of the combined effects of an intensive fishery and predation by the sea lamprey (Petromyzon marinus). The widespread application of lampricide in tributary streams had greatly reduced the abundance of lampreys by the early 1960s, and a program to restore self-sustaining populations of lake trout through stocking of yearlings and fingerlings was initiated in 1965. Although the hatchery-reared fish spawned widely in Lake Michigan each year after 1970, no progeny were observed except in an isolated area in Grand Traverse Bay. During 1971–78, sea lamprey abundance was generally greater in Wisconsin than in other parts of the lake. However, the rate of occurrence of sea lamprey wounds on lake trout dropped dramatically there in 1978 after the Peshtigo River, a tributary to Green Bay, was treated with lampricide. Application of Lake Michigan wounding rates to a regression model relating mortality to lamprey wounding developed from Lake Superior data, yielded lamprey-induced mortality estimates in 1977 of 5% in Michigan plus Indiana (combined) and 31% in Wisconsin; corresponding estimates for 1978 were 5 and 15%.Key words: lake trout, sea lamprey predation, abundance, Lake Michigan

Fecundity of the sea lamprey (Petromyzon marinus) in Lake Superior

1972 ◽  
Vol 101 (4) ◽  
pp. 718-720 ◽  
Author(s):  
Patrick J. Manion
Keyword(s):  
Lake Superior ◽  
Petromyzon Marinus ◽  
Sea Lamprey

Classification of Sea Lamprey (Petromyzon marinus) Attack Marks on Great Lakes Lake Trout (Salvelinus namaycush)

1980 ◽  
Vol 37 (11) ◽  
pp. 1989-2006 ◽  
Author(s):  
Everett Louis King Jr.
Keyword(s):  
Great Lakes ◽  
Lake Trout ◽  
Petromyzon Marinus ◽  
Attachment Site ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Oral Disc ◽  
Field Assessment ◽  
Sea Lampreys

Criteria for the classification of marks inflicted by sea lamprey (Petromyzon marinus) into nine categories were developed from laboratory studies in an attempt to refine the classification system used in field assessment work. These criteria were based on characteristics of the attachment site that could be identified under field conditions by unaided visual means and by touching the attachment site. Healing of these marks was somewhat variable and was influenced by the size of lamprey, duration of attachment, severity of the wound at lamprey detachment, season and water temperature, and by other less obvious factors. Even under laboratory conditions staging of some wounds was difficult, especially at low water temperatures. If these criteria are to be used effectively and with precision in the field, close examination of individual fish may be required. If the feeding and density of specific year-classes of sea lampreys are to be accurately assessed on an annual basis, close attention to the wound size (as it reflects the size of the lamprey's oral disc) and character of wounds on fish will be required as well as consideration of the season of the year in which they are observed.Key words: sea lamprey, attack marks, lake trout, Great Lakes

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