H. George Ketola
Science and Products
Efficacy of an extract from garlic, Allium sativum, against infection with the furunculosis bacterium, Aeromonas salmonicida, in rainbow trout, Oncorhynchus mykiss
Juvenile rainbow trout, Oncorhynchus mykiss, were fed diets containing 0, 0.5, 1.0, and 2.0% of a garlic extract, challenged with a modified 50% lethal dose of Aeromonas salmonicida and monitored for 28 d. There were significant increases in survival of trout fed 0.5 and 1.0% garlic extract as compared to the control and 2.0% garlic extract groups...
Breyer, Kate E.; Getchell, Rodman G.; Cornwell, Emily R.; Wooster, Gregory A.; Ketola, H. George; Bowser, Paul R. An investigation of the bactericidal activity of selected essential oils to Aeromonas spp.
Diseases of fishes caused by Aeromonas spp. are common, have broad host ranges and may cause high mortality. Treatments of captive-reared populations using antimicrobials are limited with concerns for bacterial resistance development and environmental dissemination. This study was done to determine whether selected plant-derived essential oils...
Starliper, Clifford E.; Ketola, H. George; Noyes, Andrew D.; Schill, William B.; Henson, Fred G.; Chalupnicki, Marc; Dittman, Dawn E. An investigation of the bactericidal activity of selected essential oils to Aeromonas spp.
Diseases of fishes caused by Aeromonas spp. are common, have broad host ranges and may cause high mortality. Treatments of captive-reared populations using antimicrobials are limited with concerns for bacterial resistance development and environmental dissemination. This study was done to determine whether selected plant-...
Starliper, Clifford E.; Ketola, H. George; Noyes, Andrew D.; Schill, William B.; Henson, Fred G.; Chalupnicki, Marc A.; Dittman, Dawn E. Thiamine status of rainbow smelt (Osmerus mordax) eggs in the Great Lakes, USA
During spring 2006–2009, eggs were collected for analysis of total thiamine from gravid rainbow smelt (Osmerus mordax) captured in each of the Great Lakes and two other waters as references for comparison. Mean standard length (mm ± standard error) of gravid females significantly differed between sample waters, with the Atlantic Ocean population...
Chalupnicki, Marc A.; Ketola, H. George; Zehfus, Micheal H.; Crosswait, Jonathan R.; Rinchard, Jacques Efficacy and toxicity of iodine disinfection of Atlantic salmon eggs
Recent interest in the restoration of Atlantic salmon Salmo salar in the Great Lakes has given rise to new culture techniques and management programs designed to reduce pathogen transmission while stabilizing and enhancing wild populations. We examined the toxicity of iodine to Atlantic salmon eggs and its effectiveness as a disinfectant against...
Chalupnicki, M.A.; Ketola, H.G.; Starliper, C.E.; Gallagher, D. Influence of diet of double-crested cormorants on thiamine, lead, and mineral contents of their eggs
Throughout much of the Great Lakes basin, reproduction of several fish species is impaired by deficiency of thiamine in their eggs, an effect attributed to consumption of thiaminase-containing forage species, primarily alewife (Alosa pseudoharengus.) Because the double-crested cormorant (Phalacrocorax auritus) nesting on islands in Lake Ontario is...
Ketola, H. George; Johnson, James H.; Adams, C.M.; Farquhar, J.F. Influence of diet of double-crested cormorants on thiamine, lead, and mineral contents of their eggs
Throughout much of the Great Lakes basin, reproduction of several fish species is impaired by deficiency of thiamine in their eggs, an effect attributed to consumption of thiaminase-containing forage species, primarily alewife (Alosa pseudoharengus). Because the double-crested cormorant (Phalacrocorax auritus) nesting on islands in Lake Ontario is...
Ketola, H.G.; Johnson, J. H.; Adams, C.M.; Farquhar, J.F. Thiamine content of eggs and lengths of coho salmon (Oncorhynchus kisutch) in relation to abundance of alewife (Alosa pseudoharengus) in eastern Lake ontario, 2003 to 2006
Early mortality syndrome in fry of Great Lakes salmonines is linked to reduced levels of thiamine in eggs, which reflects maternal consumption of forage fishes such as alewife (Alosa pseudoharengus) that contain thiaminase, an enzyme that destroys thiamine. We assessed annual variations in abundance and condition of alewives and thiamine status of...
Ketola, H.G.; Rinchard, J.; O'Gorman, R.; Begnoche, L.J.; Bishop, D.L.; Greulich, A.W. Effectiveness and retention of thiamine and its analogs administered to steelhead and landlocked Atlantic salmon
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...
Ketola, H.G.; Isaacs, G.R.; Robins, J.S.; Lloyd, R.C. Thiamine status of Cayuga Lake rainbow trout and its influence on spawning migration
Rainbow trout Oncorhynchus mykiss in Cayuga Lake, New York, appear to be suffering from a thiamine deficiency because their progeny develop general weakness, loss of equilibrium, and increased mortality, which are prevented by treatment with thiamine. Thiamine status and its effect on adults are unknown. In 2000 and 2002, we captured, tagged, and...
Ketola, H. George; Chiotti, Thomas L.; Rathman, Robert S.; Fitzsimons, John D.; Honeyfield, Dale C.; Van Dusen, Peter J.; Lewis, Graham E. Dietary uptake of polychlorinated biphenyls (PCBs) by rainbow trout
The presence of detectable levels of polychlorinated biphenyls (PCBs) in commercially produced fish feed has raised a concern about the degree of biomagnification of these contaminants in hatchery-reared trout. Our objectives were to (1) define the relationship between concentrations of PCBs in fish feed and in fish tissue and (2) estimate the...
Carline, Robert F.; Barry, Patrick M.; Ketola, H. George Relationships between thiamine content of eggs and concentrations of lead and other heavy metals in water and survival of Atlantic salmon fry
Atlantic salmon (Salmo salar) were extirpated in much of New York state by the late 1800s. Currently, Atlantic salmon from Little Clear Pond (Saranac Lake, NY) are stocked in Cayuga Lake (Ithaca, NY) and Lake Ontario to support a fishery, but reproduction is severely impaired by thiamine deficiency in Cayuga Lake and probably in Lake Ontario--...
Wagenet, Linda P.; Eckhardt, David A.V.; Hairston, Nelson G.; Karig, Daniel E.; Yager, Richard; Ketola, H. George; Wedge, Leslie R.; Lary, Sandra J.; Grant, Edward C.; Rutzke, Michael A.