Transactions of the American Fisheries Society, 1998
... KOFI FYNN-AIKINS*1 Tunison Laboratory of Aquatic Science Biological Resources Division, US Ge... more ... KOFI FYNN-AIKINS*1 Tunison Laboratory of Aquatic Science Biological Resources Division, US Geological Survey Great Lakes Science Center, Cortland, New ... in all tissues were deter-mined by high-performance liquid chromatogra-phy (HPLC) as described by Brown et al. ...
Transactions of the American Fisheries Society, 1993
... Juvenile rainbow trout having initial mean body weights of 5.3 g (exper-iment 1) and 2.1 g (e... more ... Juvenile rainbow trout having initial mean body weights of 5.3 g (exper-iment 1) and 2.1 g (experiment 2) were stocked at 50 and 100 fish per jar, respectively. Diets.—In experiment 1, fish were fed two com-mercially prepared diets and three experimental formulations. ...
We investigated the feasibility of enhancing the reproduction of steelhead Oncorhynchus mykiss an... more We investigated the feasibility of enhancing the reproduction of steelhead Oncorhynchus mykiss and landlocked Atlantic salmon Salmo salar in lakes where the consumption of alewives Alosa pseudoharengus and other forage fishes containing thiaminase can cause them to become thiamine deficient and thereby reduce the survival of their fry. We evaluated feeding fingerling steelhead excess thiamine hydrochloride (THC1) for 1 or 2 weeks or equimolar amounts of thiamine mononitrate, thiamine-tetrahydrofurfuryl-disulfide, benfotiamine, or dibenzoyl thiamine (DBT). We found minimal internal reserves of thiamine after 6 months. We also compared the ability of injections of thiamine and its analogs to prevent mortality in thiamine-deficient steelhead and Atlantic salmon sac fry and found all forms to be effective, although benfotiamine was the least effective on an equimolar basis. Further, we injected yearling steelhead and found that DBT was tolerated at approximately 11,200 nmol/g of body weight, about 10 times more than thiamine in any other form. When yearling steelhead were injected with near-maximal doses of thiamine hydrochloride and several analogs and then fed a thiamine-deficient diet, DBT was retained for approximately 2 years--in contrast to other forms, which were retained for less than about 6 months. Therefore, these results suggest that neither feeding nor injecting young hatchery salmonids with DBT is likely to enhance their reproduction for more than 2 years after stocking. However, injecting DBT in nearly mature fish (either cultured fish from hatcheries or wild fish captured in lakes) may provide them with enough thiamine to successfully spawn within 2 years even though they consume mainly thiaminase-containing forage fishes.
Transactions of the American Fisheries Society, 2000
... PAUL R. BOWSER AND GREGORY A. WOOSTER Aquatic Animal Health Program, Department of Microbiolo... more ... PAUL R. BOWSER AND GREGORY A. WOOSTER Aquatic Animal Health Program, Department of Microbiology and Immunology, College of ... Abstract.Previous researchers demonstrated that a mortality in fry (called Cayuga syndrome) of Atlantic salmon Salmo salar from ...
Transactions of the American Fisheries Society, 1998
... KOFI FYNN-AIKINS*1 Tunison Laboratory of Aquatic Science Biological Resources Division, US Ge... more ... KOFI FYNN-AIKINS*1 Tunison Laboratory of Aquatic Science Biological Resources Division, US Geological Survey Great Lakes Science Center, Cortland, New ... in all tissues were deter-mined by high-performance liquid chromatogra-phy (HPLC) as described by Brown et al. ...
Transactions of the American Fisheries Society, 1993
... Juvenile rainbow trout having initial mean body weights of 5.3 g (exper-iment 1) and 2.1 g (e... more ... Juvenile rainbow trout having initial mean body weights of 5.3 g (exper-iment 1) and 2.1 g (experiment 2) were stocked at 50 and 100 fish per jar, respectively. Diets.—In experiment 1, fish were fed two com-mercially prepared diets and three experimental formulations. ...
We investigated the feasibility of enhancing the reproduction of steelhead Oncorhynchus mykiss an... more We investigated the feasibility of enhancing the reproduction of steelhead Oncorhynchus mykiss and landlocked Atlantic salmon Salmo salar in lakes where the consumption of alewives Alosa pseudoharengus and other forage fishes containing thiaminase can cause them to become thiamine deficient and thereby reduce the survival of their fry. We evaluated feeding fingerling steelhead excess thiamine hydrochloride (THC1) for 1 or 2 weeks or equimolar amounts of thiamine mononitrate, thiamine-tetrahydrofurfuryl-disulfide, benfotiamine, or dibenzoyl thiamine (DBT). We found minimal internal reserves of thiamine after 6 months. We also compared the ability of injections of thiamine and its analogs to prevent mortality in thiamine-deficient steelhead and Atlantic salmon sac fry and found all forms to be effective, although benfotiamine was the least effective on an equimolar basis. Further, we injected yearling steelhead and found that DBT was tolerated at approximately 11,200 nmol/g of body weight, about 10 times more than thiamine in any other form. When yearling steelhead were injected with near-maximal doses of thiamine hydrochloride and several analogs and then fed a thiamine-deficient diet, DBT was retained for approximately 2 years--in contrast to other forms, which were retained for less than about 6 months. Therefore, these results suggest that neither feeding nor injecting young hatchery salmonids with DBT is likely to enhance their reproduction for more than 2 years after stocking. However, injecting DBT in nearly mature fish (either cultured fish from hatcheries or wild fish captured in lakes) may provide them with enough thiamine to successfully spawn within 2 years even though they consume mainly thiaminase-containing forage fishes.
Transactions of the American Fisheries Society, 2000
... PAUL R. BOWSER AND GREGORY A. WOOSTER Aquatic Animal Health Program, Department of Microbiolo... more ... PAUL R. BOWSER AND GREGORY A. WOOSTER Aquatic Animal Health Program, Department of Microbiology and Immunology, College of ... Abstract.Previous researchers demonstrated that a mortality in fry (called Cayuga syndrome) of Atlantic salmon Salmo salar from ...
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