Reduction of Antithiamine Activity in Crayfish by Heat Treatments

Rutledge, James E.; Ying, Levi C.

doi:10.1111/j.1365-2621.1972.tb02675.x

Cited by 2 publications

(3 citation statements)

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“…However, their thiaminase activity is too low or their consumption is too low, as a diet consisting of Round Goby was not associated with thiamine deficiency in Lake Michigan Lake Trout, whereas the consumption of Alewives was associated with thiamine deficiency (Jaroszewska et al 2009). The crayfish Procambarus clarkii reportedly contains thiaminase, but there are no reports of thiamine deficiency in fish related to the consumption of crayfish (Rutledge and Ying 1972). In the Great Lakes, the crayfishes Orconectes propinquus, Orconectes virilis, and Orconectes rusticus all readily consume dreissenid mussels, which are a known source of elevated thiaminase activity that is 25-fold higher than the thiaminase activity reported for Lake Michigan Alewives ).…”

Section: Discussionmentioning

confidence: 96%

“…For larval stages of these same salmonines, thiamine deficiency leads to mortality known as early mortality syndrome, as well as reduced growth, foraging, and predator avoidance (Brown et al 1998b;Fitzsimons et al 2009). Lake Ontario eels are known to consume Alewives and other prey (J. Casselman, Queens University, personal communication; J. Bowlby, Ontario Ministry of Natural Resources, personal communication), some of which also contain thiaminase (e.g., Rainbow Smelt Osmerus mordax, Round Goby Neogobius melanostomus, and crayfish; Rutledge and Ying 1972;Tillitt et al 2005;Honeyfield et al 2012). However, relatively little is known about the quantitative importance of any of these prey taxa for eel diets or their possible effects on the thiamine status and health of the eels.…”

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confidence: 99%

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Impacts of Diet on Thiamine Status of Lake Ontario American Eels

Fitzsimons¹,

Brown²,

Brown³

et al. 2013

Trans Am Fish Soc

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The Lake Ontario-upper St. Lawrence River (LOUSL) population of American Eels Anguilla rostrata (hereafter, "eels") was once one of the most important groups of the species but is now in a state of serious decline. Given that thiamine deficiency has been observed in almost all of the top predators in Lake Ontario, we assessed the potential that a diet-induced thiamine deficiency associated with consumption of Alewives Alosa pseudoharengus could be involved. Muscle thiamine was measured in eels from throughout the LOUSL corridor and was compared with putative threshold effect levels established from the literature. Mirex concentrations were used to separate Lake Ontario-resident eels from non-Lake Ontario-resident eels. Stable isotope analyses of eel muscle samples and potential prey, including Alewives, were combined with mixing model software to infer the diets consumed by Lake Ontario eels. Although residence in Lake Ontario was associated with a significant decline in muscle thiamine concentration, estimated Alewife consumption by eels was unexpectedly low. Instead, mixing model results indicated that crayfish and Round Goby Neogobius melanostomus were the major prey. Both taxa are known to contain thiaminase and have the potential to cause thiamine deficiency, but there are no reports of thiamine deficiency associated with Round Goby consumption, thus implicating crayfish. There was no recovery in thiamine levels prior to the initiation of oceanic migration. As a result, thiamine levels of Lake Ontario-resident eels prior to migration were only slightly above putative threshold effect levels for pathological and behavioral effects in Japanese Eels Anguilla japonica, but *Corresponding author: fitzsimonsj@dfo-mpo.gc.ca 1 Deceased. 1358THIAMINE STATUS OF AMERICAN EELS 1359 this would require confirmation with American Eels. Since thiamine levels are expected to decline further during migration, additional effects on eel behavior, reproduction, and survival seem probable. Because of panmixia, such effects-when combined with the relatively high reproductive potential of Lake Ontario-resident eels-may have consequences for the entire species.

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Section: Discussionmentioning

confidence: 96%

mentioning

confidence: 99%

Impacts of Diet on Thiamine Status of Lake Ontario American Eels

Fitzsimons¹,

Brown²,

Brown³

et al. 2013

Trans Am Fish Soc

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“…Thiamine deficiency Thiamine does not appear to be a limiting factor for fish in most aquatic ecosystems although the levels may decline in some species under certain conditions. Thiaminase, an enzyme found in cell lysosomes that catalyses thiamine breakdown, has been reported in herring-like and oiher fish species, and some molluscs and crustaceans (JACOBSHON and AZEVADO, 1947;NEILANDS, 1947;RUTLEDGE and YING, 1972;SATO et al, 1994). A survey of marine fish reported high thiaminase activity among 11 of the 50 species examined (ISHIHARA et al, 1973).…”

Section: Dynamics In Fishmentioning

confidence: 99%

Thiamine dynamics in aquatic ecosystems and its biological implications

Niimi¹,

Jackson²,

Fitzsimons³

1997

Intl Review of Hydrobiology

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Thiamine concentrations were monitored in various organisms ranging from plankton to fish in the Lake Ontario ecosystem.'The low concentrations found in most samples indicated thiamine levels were not strongly influenced by the trophic status of an organism. A similar conclusion was indicated from data reported by other studies in freshwater and marine ecosystems. Thiamine is produced by microbes and microalgae, and is acquired by higher trophic level organisms through the diet. The issue of thiamine deficiency in wild fish was also examined. It was concluded that increased dietary consumption of prey containing thiaminase was an important factor that can reduce thiamine levels in higher trophic level species.

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Reduction of Antithiamine Activity in Crayfish by Heat Treatments

Cited by 2 publications

References 9 publications

Impacts of Diet on Thiamine Status of Lake Ontario American Eels

Impacts of Diet on Thiamine Status of Lake Ontario American Eels

Thiamine dynamics in aquatic ecosystems and its biological implications

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