Lake Trout Restoration in the Great Lakes: Stock-Size Criteria for Natural Reproduction

Selgeby, James H.; Bronte, Charles R.; Brown, Edward H.; Hansen, Michael J.; Holey, Mark E.; VanAmberg, Jan P.; Muth, Kenneth M.; Makauskas, Daniel; McKee, Patrick C.; Anderson, David M.; Ferreri, C. Paola; Schram, Stephen T.

doi:10.1016/s0380-1330(95)71121-2

Cited by 35 publications

(34 citation statements)

References 17 publications

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“…Despite seemingly adequate numbers of mature lake trout through much of the 1980s and into the early 1990s (Selgeby et al 1995), there were few reports of naturally produced fish except for fry captured on spawning shoals (Casselman 1995;Elrod et al 1995;Krueger et al 1995). Failure of the hatchery-origin fish to reproduce was puzzling because many of the factors thought to contribute to reproductive failure of lake trout in the Great Lakes were relaxed, and ecosystem quality seemed to be improving (Fitzsimons et al 2003).…”

Section: Lake Troutmentioning

confidence: 99%

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Mills¹,

Casselman²,

Dermott³

et al. 2003

Can. J. Fish. Aquat. Sci.

309

217

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We examined stressors that have led to profound ecological changes in the Lake Ontario ecosystem and its fish community since 1970. The most notable changes have been reductions in phosphorus loading, invasion by Dreissena spp., fisheries management through stocking of exotic salmonids and control of sea lamprey (Petromyzon marinus), and fish harvest by anglers and double-crested cormorants (Phalacrocorax auritus). The response to these stressors has led to (i) declines in both algal photosynthesis and epilimnetic zooplankton production, (ii) decreases in alewife (Alosa pseudoharengus) abundance, (iii) declines in native Diporeia and lake whitefish (Coregonus clupeaformis), (iv) behavioral shifts in alewife spatial distribution benefitting native lake trout (Salvelinus namaycush), threespine stickleback (Gasterosteus aculeatus), and emerald shiner (Notropis atherinoides) populations, (v) dramatic increases in water clarity, (vi) predation impacts by cormorants on select fish species, and (vii) lake trout recruitment bottlenecks associated with alewife-induced thiamine deficiency. We expect stressor responses associated with anthropogenic forces like exotic species invasions and global climate warming to continue to impact the Lake Ontario ecosystem in the future and recommend continuous long-term ecological studies to enhance scientific understanding and management of this important resource. 490Résumé : On trouvera ici un examen des facteurs de stress qui ont modifié profondément l'écosystème du lac Ontario et sa communauté de poissons depuis 1970. Les changements les plus importants ont été la réduction de l'apport de phosphore, l'invasion des Dreissena spp., la gestion de la pêche, notamment l'empoissonnement de salmonidés exotiques et le contrôle de la grande lamproie marine (Petromyzon marinus), ainsi que la récolte des poissons par les pêcheurs sportifs et les cormorans à aigrette (Phalacrocorax auritus). La réaction à ces facteurs a eu pour conséquen-ces: (i) le déclin de la photosynthèse des algues et de la production du zooplancton épilimnétique, (ii) la diminution de l'abondance du gaspareau (Alosa pseudoharengus), (iii) la réduction des Diporeia indigènes et des grands corégonesCan.

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Section: Lake Troutmentioning

confidence: 99%

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Mills¹,

Casselman²,

Dermott³

et al. 2003

Can. J. Fish. Aquat. Sci.

309

217

View full text Add to dashboard Cite

show abstract

“…Lake trout restoration research has been focused on identifying impediments to restoration, but a number of key questions remain unanswered. For example, a relative spawner abundance threshold of 50 lake trout /305 m of assessment gill net has been widely used to determine if spawner abundance is sufficient for reproduction (Selgeby et al, 1995), but the actual relationship between catch rates and spawner abundance is unknown because the primary assessment tool has been gill netting. Some reefs in Lake Michigan (including Sheboygan Reef) that have met or exceeded the above catch rate criterion have not exhibited recruitment of naturally spawned lake trout, suggesting additional recruitment bottlenecks are involved (Bronte et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan

Warner

Claramunt

Janssen

et al. 2009

Journal of Great Lakes Research

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“…In contrast, spawning by contemporary lake trout stocks appears restricted to cobble substrates in relatively shallow (< 15 m) water Wagner 1981;Peck 1986;Fitzsimons 1994aFitzsimons , 1995Casselman 1995;Holey et al 1995;Kelso et al 1995;Schreiner et al 1995). The difference between historic and contemporary accounts may result from incorrectly inferring where spawning occurred.…”

Section: Is There a Need For Artificial Reefs In The Great Lakes?mentioning

confidence: 99%

“…In southern and central Lake Michigan, where cobble substrates are rare nearshore, man-made structures have been the only sites where substantial numbers of lake trout eggs and fry have been collected Wagner 1981;Marsden 1994;Holey et al 1995). In Lakes Superior and Ontario also, studies have indicated that the highest density of lake trout eggs occurs on man-made structures in areas where natural cobble substrates are rare (Marsden 1994;Schreiner et al 1995;Fitzsimons 1995).…”

Section: Is There a Need For Artificial Reefs In The Great Lakes?mentioning

confidence: 99%

“…There is no information as to where lake trout spawn in Lake Erie. The large number of known spawning areas evaluated in Lakes Ontario and Michigan (Marsden 1994;Fitzsimons 1995) reflects the attempts to determine the causes of poor natural reproduction (Elrod et al 1995;Holey et al 1995). Comparisons of spawning activity between man-made structures and natural spawning areas for each of Lakes Ontario, Huron, Michigan, and Superior are depicted in -5.…”

Section: A Review Of Lake Trout Spawning At Man-made Structures and Nmentioning

confidence: 99%

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The significance of man-made structures for lake trout spawning in the Great Lakes: are they a viable alternative to natural reefs?

Fitzsimons¹

1996

Can. J. Fish. Aquat. Sci.

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High lake trout (Salvelinus namaycush) egg abundance reported at some man-made structures, including artificial reefs in Lakes Michigan and Ontario, indicates that construction of artificial reefs may be one means of enhancing reproduction for this species in the Great Lakes. A review of spawning at man-made and natural spawning areas indicated consistently higher abundance of eggs, fry, and young-of-the-year lake trout associated with man-made structures. Hence, artificial reefs could make a significant contribution to restoration of lake trout stocks in the Great Lakes. It was not clear, however, why some man-made structures were used by lake trout and some were not. It is recommended, therefore, that construction of artificial reefs be approached on an experimental basis and that reef construction be part of an overall strategy to increase availability of spawning habitat. Also included in this strategy is stocking lake trout closer to areas of natural spawning substrate and resolving potential resource user conflicts. Studies should also be conducted to evaluate how life stage at stocking (e.g., egg, fry, yearling) affects subsequent use of spawning habitat and to determine if genetic factors are involved.

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Lake Trout Restoration in the Great Lakes: Stock-Size Criteria for Natural Reproduction

Cited by 35 publications

References 17 publications

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan

The significance of man-made structures for lake trout spawning in the Great Lakes: are they a viable alternative to natural reefs?

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Lake Trout Restoration in the Great Lakes: Stock-Size Criteria for Natural Reproduction

Cited by 35 publications

References 17 publications

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Acoustic estimates of abundance and distribution of spawning lake trout on Sheboygan Reef in Lake Michigan

The significance of man-made structures for lake trout spawning in the Great Lakes: are they a viable alternative to natural reefs?

Contact Info

Product

Resources

About

Lake Ontario: food web dynamics in a changing ecosystem (19702000)

Lake Ontario: food web dynamics in a changing ecosystem (19702000)