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

King, Everett L.

doi:10.1139/f80-240

Cited by 70 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Introductionmentioning

confidence: 99%

“…Lampreys are ancestral jawless vertebrates with complex life histories (Kelly & King 2001, Potter et al 2015. They occur within temperate waters of both the Northern and Southern hemispheres (Renaud 1997, Kelly & King 2001. Three semelparous anadromous lamprey species have been identified in north-western European waters: the sea lamprey Petromyzon marinus (Linnaeus, 1758); the Arctic lamprey Lethenteron camtschaticum (Tilesius, 1811), which has only been observed in Sweden and therefore not considered hereinafter) (Maitland 1980, Potter et al 2015; and the European river lamprey Lampetra fluviatilis (Linnaeus, 1758) (Potter et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The population status of P. marinus and L. fluviatilis is of major concern. During the late 20 th century, the, the combined impacts of increased targeted fishing in estuaries, river pollution, freshwater habitat destruction and engineering works such as the construction of dams led to their decline (Kelly & King 2001, Beaulaton et al 2008, Mateus et al 2012, Lasne et al 2015, Maitland et al 2015. Climate change may also aggravate lamprey populations during their freshwater habitat occupancy (Lassalle & Rochard 2009, Maitland et al 2015.…”

Section: Introductionmentioning

confidence: 99%

“…The freshwater stages of the P. marinus and L. fluviatilis life cycle (spawning in rivers, larval stages, metamorphosis and downstream migration) are well characterised (e.g. Kelly & King 2001, Maitland, 2003, Docker & Potter 2019). The precise timings of migration to and from the sea vary with factors such as latitudinal clines and environmental conditions (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…clupeoids and gadoids) than P. marinus, which parasitises species of a wide range of sizes (e.g. clupeoids, salmonids to elasmobranchs and marine mammals) (Kelly & King 2001, Maitland 2003, Lança et al 2013, Silva et al 2014, Renaud & Cochran 2019. Adult L. fluviatilis migrating back to freshwater, range be tween 20 and 50 cm in size (mean 30 cm) (Kelly & King 2001, Mateus et al 2012, Docker & Potter 2019, Renaud & Cochran 2019, whereas adult P. marinus can range from 60 to 122 cm (Hansen et al 2016, Docker & Potter 2019, Renaud & Cochran 2019.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Shedding light on the river and sea lamprey in western European marine waters

Elliott

Deleys

Rivot

et al. 2021

Endang. Species. Res.

View full text Add to dashboard Cite

Lampreys are ancestral jawless vertebrates with particularly complex life histories. Population declines resulting from increased anthropogenic pressure have been observed. For semelparous diadromous lampreys, the marine phase remains largely a black box, making targeted management and conservation measures difficult to implement. Here, we collated a database of 168904 hauls from both fisheries-dependent and fisheries-independent surveys between 1965 and 2019. Lampreys were observed in only 254 hauls (<1% lamprey presence); 421 sea lamprey Petromyzon marinus and 300 European river lamprey Lampetra fluviatilis were identified. Sizes ranged from 13 to 92 cm and from 14 to 42 cm, respectively. The majority of lampreys (61%) were caught by mobile demersal gear types. The highest presence of both species was recorded within the Greater North Sea, followed by the Bay of Biscay. L. fluviatilis was observed closer to the coast than P. marinus. For both lampreys, there was an increase in size with distance from the coast. P. marinus were predominantly <60 cm and observed from August to February, indicating that these were sexually immature juveniles migrating out to sea. For L. fluviatilis, the majority were thought to be adults (>20 cm) and occurred in autumn, indicating inshore migration. Our observations provide insight into the ecology of lampreys at sea and highlight study locations and gear types, which may be more pertinent for future research. Greater awareness is needed during surveys to collate catch information on lampreys and improve understanding of their ecology and phenology at sea.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Shedding light on the river and sea lamprey in western European marine waters

Elliott

Deleys

Rivot

et al. 2021

Endang. Species. Res.

View full text Add to dashboard Cite

show abstract

Factors Affecting Postrelease Survival of Coded‐Wire‐Tagged Lake Trout in Lake Michigan at Four Historical Spawning Locations

Kornis

Bronte

Holey

et al. 2019

N American J Fish Manag

View full text Add to dashboard Cite

Since the 1950s, fishery agencies on Lake Michigan have pursued Lake Trout Salvelinus namaycush rehabilitation through Sea Lamprey Petromyzon marinus control, harvest regulations, and stocking millions of fish annually. Stocking was prioritized at four historically important spawning locations beginning in 1985, and coded wire tags (CWTs) were used to help evaluate performance. We used data from coded‐wire‐tagged fish captured in fishery‐independent surveys from 1998 to 2014 to evaluate relative postrelease survival of Lake Trout, estimated by CPUE and corrected for the number of fish stocked, across 173 CWT lots of the 1994–2003 year‐classes stocked at the four locations. Boosted regression tree models were used to assess the relative influence of four variables on Lake Trout CPUE in two age‐groups (ages 4–5 and ages 6–10) and were paired with ANOVAs to test for statistical significance. Genetic strain (29.1%), stocking location (27.8%), mortality at release (23.1%), and predator density (19.9%) had similar influences on the relative survival of younger fish, whereas the relative survival of older fish was heavily influenced by stocking location (79.8%). Survival of both age‐groups was lowest for fish stocked in the Northern Refuge, where the age structure was truncated due to fishery harvest and Sea Lamprey predation. Survival of stocked fish was higher at the Southern Refuge, Clay Banks, and Julian's Reef, where mortality from Sea Lamprey and harvest was lower and where increases in wild Lake Trout have been observed in recent years. Stocked Lake Michigan remnant genetic strains also appeared to survive better than strains from other lakes at these three locations, but strain effects could not be fully disentangled from the effects of stocking location, and the continued stocking of multiple genetic strains may provide resiliency to future selection pressures. Continued progress toward rehabilitation will require reducing fishing and Sea Lamprey‐induced mortality in northern Lake Michigan to build parental stocks of advanced ages as well as balancing efforts among competing management goals.

show abstract

Lake Trout population dynamics in the Northern Refuge of Lake Michigan: Importance of stocking rate

Madenjian,

Dieter,

Desorcie

et al. 2023

N American J Fish Manag

View full text Add to dashboard Cite

ObjectiveThe Northern Refuge of Lake Michigan was established under the auspices of the Great Lakes Fishery Commission in 1985 as an additional step toward restoring a self‐sustaining Lake Trout Salvelinus namaycush population to the lake. The overall goal of our study was to assess progress toward Lake Trout rehabilitation in the Northern Refuge through 2021.MethodsWe conducted annual (1992–2021) gill‐net surveys in the fall to assess the adult population and beam trawl surveys in the spring to assess naturally reproduced age‐0 Lake Trout.ResultSpawner abundance averaged 45 fish • 305 m of gill net−1 • day−1 during 1992–1999, just 4 fish • 305 m of gill net−1 • day−1 during 2000–2014, and then 67 fish • 305 m of gill net−1 • day−1 during 2018–2021. Sea Lamprey Petromyzon marinus wounding rate decreased by nearly 90% between the 2000–2014 and 2015–2021 periods. The average annual mortality rate of adult Lake Trout decreased from 43% during the 1990s and 2000s to 22% during 2015–2021. All of these population dynamics were partly driven by changes in Lake Trout stocking rates, which declined by roughly 50% during 1994–1996 but then increased roughly twofold during 2006–2010 and remained at this higher level during 2010–2018. In 2021, early signs of natural recruitment of Lake Trout became evident. Beam trawling during June 2021 yielded a wild age‐0 Lake Trout, the first ever caught since the surveys began in 1992. In addition, 15 (4% of total catch) of the Lake Trout caught in the fall 2021 gill‐net survey were unclipped (wild) fish. Estimated ages of these wild fish indicated that natural recruitment had begun sometime around 2015.ConclusionWith Alewife Alosa pseudoharengus abundance in Lake Michigan at record low levels, Sea Lamprey wounding rate greatly reduced, and Lake Trout spawner abundance at relatively high levels, the outlook for Lake Trout rehabilitation in the Northern Refuge holds promise.

show abstract

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

Cited by 70 publications

References 0 publications

Shedding light on the river and sea lamprey in western European marine waters

Shedding light on the river and sea lamprey in western European marine waters

Factors Affecting Postrelease Survival of Coded‐Wire‐Tagged Lake Trout in Lake Michigan at Four Historical Spawning Locations

Lake Trout population dynamics in the Northern Refuge of Lake Michigan: Importance of stocking rate

Contact Info

Product

Resources

About