Five year trends in the egg-thiamine status of Atlantic salmon from the St. Marys River, Michigan

Werner, R. Marshall; Southwell, Benjamin; Rook, Benjamin J.

doi:10.1016/j.jglr.2011.01.001

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Our results provide further support that a diet of alewives is associated with TDC in Great Lakes lake trout, as thiamine concentrations in lake trout eggs have generally increased in Lakes Huron and Michigan during 2001-2009 and the increase was coincident with a decline in alewife abundance in both lakes Madenjian et al 2010). Similarly, Werner et al (2011) reported that egg thiamine concentrations of Atlantic salmon Salmo salar from the St. Marys River, which were likely feeding in northern Lake Huron, were higher in 2005 and 2007 than in 2003. These results suggest that low alewife abundance may currently be a prerequisite for high egg thiamine concentrations and subsequent successful reproduction by lake trout in the Great Lakes.…”

Section: Discussionmentioning

confidence: 95%

Increasing Thiamine Concentrations in Lake Trout Eggs from Lakes Huron and Michigan Coincide with Low Alewife Abundance

Riley

Rinchard

Honeyfield

et al. 2011

N American J Fish Manag

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Lake trout Salvelinus namaycush in the Laurentian Great Lakes suffer from thiamine deficiency as a result of adult lake trout consuming prey containing thiaminase, a thiamine-degrading enzyme. Sufficiently low egg thiamine concentrations result in direct mortality of or sublethal effects on newly hatched lake trout fry. To determine the prevalence and severity of low thiamine in lake trout eggs, we monitored thiamine concentrations in lake trout eggs from 15 sites in Lakes Huron and Michigan from 2001 to 2009. Lake trout egg thiamine concentrations at most sites in both lakes were initially low and increased over time at 11 of 15 sites, and the proportion of females with egg thiamine concentrations lower than the recommended management objective of 4 nmol/g decreased over time at eight sites. Egg thiamine concentrations at five of six sites in Lakes Huron and Michigan were significantly inversely related to site-specific estimates of mean abundance of alewives Alosa pseudoharengus, and successful natural reproduction of lake trout has been observed in Lake Huron since the alewife population crashed. These results support the hypothesis that low egg thiamine in Great Lakes lake trout is associated with increased alewife abundance and that low alewife abundance may currently be a prerequisite for successful reproduction by lake trout in the Great Lakes.

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Section: Discussionmentioning

confidence: 95%

Increasing Thiamine Concentrations in Lake Trout Eggs from Lakes Huron and Michigan Coincide with Low Alewife Abundance

Riley

Rinchard

Honeyfield

et al. 2011

N American J Fish Manag

View full text Add to dashboard Cite

show abstract

“…Kennedy et al (2011) provide evidence for hybridization of pink Oncorhynchus gorbuscha and Chinook salmon Oncorhynchs tshawytscha in the river and present a morphometric identification tool. Werner et al (2011) present Atlantic salmon egg-thiamine data as part of a continuing effort to monitor Early Mortality Syndrome (EMS) in this unique population. Bauman et al (2011) and Gerig et al (2011) provide evidence of a localized, resident population of threatened lake sturgeon.…”

Section: Special Issue Areas Of Focusmentioning

confidence: 99%

“…It contains seven papers (Bauman et al, 2011;Caroffino et al, 2011;Gerig et al, 2011;Keller et al, 2011;Kennedy et al, 2011;Turschak et al, 2011, andWerner et al, 2011) with eight undergraduate student authors or co-authors that led and/or assisted on research projects during their tenure at Lake Superior State University (LSSU). All of these students have since gone on to pursue graduate education or work in scientific fields, and many often attribute their success to their undergraduate research experience.…”

Section: Student Research Contributionsmentioning

confidence: 99%