Alec Maule, Ph.D.
Alec is a Research Physiologist Emeritus for the USGS, Columbia River Research Laboratory.
Science and Products
Filter Total Items: 65
Gas bubble disease monitoring and research of juvenile salmonids, 1999
Abstract not available
Authors
J.W. Beeman, T.C. Robinson, P.V. Haner, S. P. VanderKooi, A.G. Maule
Gas bubble disease in resident fish below Grand Coulee Dam: final report of research
Fish kills have occurred in the reservoir below Grand Coulee Dam possibly due to total dissolved gas supersaturation (TDGS), which occurs when water cascades over a dam or waterfall. The highest TDGS below Grand Coulee Dam has occurred after spilling water via the outlet tubes, though TDGS from upstream sources has also been recorded. Exposure to TDGS can cause gas bubble disease in aquatic organi
Authors
J.W. Beeman, D.A. Venditti, R.G. Morris, D.M. Gadomski, B.J. Adams, S.J. Vanderkooi, T.C. Robinson, A.G. Maule
Fasting modifies Aroclor 1254 impact on plasma cortisol, glucose and lactate responses to a handling disturbance in Arctic charr
Integrated effects of polychlorinated biphenyl (PCB) and nutritional status on responses to handling disturbance were investigated in the Arctic charr (Salvelinus alpinus). The fish were orally contaminated with Aroclor 1254 and held either with or without food for 5 months before they were subjected to a 10-min handling disturbance. Food-deprived fish were given 0, 1, 10 or 100 mg PCB kg−1 and th
Authors
E.H. Jorgensen, M.M. Vijayan, N. Aluru, A.G. Maule
Antibody-producting cells correlated with body weight in juvenile Chinook salmon Oncorhynchus tshawytscha acclimated to optimal and elevated temperatures
The immune response of juvenile chinook salmon (Oncorhynchus tshawytscha) ranging in weight from approximately 10 to 55 g was compared when the fish were acclimated to either 13 or 21° C. A haemolytic plaque assay was conducted to determine differences in the number of antibody-producing cells (APC) among fish of a similar age but different body weights. Regression analyses revealed significant in
Authors
L.N.M. Harrahy, Carl B. Schreck, Alec G. Maule
Coho salmon Oncorhynchus kisutch strain differences in disease resistance and non-specific immunity, following immersion challenges with Vibrio anguillarum
Two strains of freshwater-reared coho salmon Oncorhynchus kisutch were compared for differences in the activity of selected non-specific immune factors before and after lethal and non-lethal immersion challenges with the marine bacterial pathogen Vibrio anguillarum (Vang). Two disease challenge experiments were performed. The first experimental challenge resulted in no mortality; however, signific
Authors
Shannon K. Balfry, Alec G. Maule, George K. Iwama
Residence times and diel passage distributions of radio-tagged juvenile spring chinook salmon and steelhead in a gatewell and fish collection channel of a Columbia River Dam
The amount of time radio-tagged juvenile spring chinook salmon Oncorhynchus tshawytscha and juvenile steelhead O. mykiss spent within a gatewell and the juvenile collection channel at McNary Dam, Columbia River, USA, was measured to determine the diel passage behavior and residence times within these portions of the juvenile bypass system. The median gatewell residence times were 8.9 h for juvenil
Authors
J.W. Beeman, A.G. Maule
Use of a miniature pressure-sensitive transmitter to determine the in-situ migration depths of juvenile salmonids in relation to total dissolved gas supersaturation
Abstract not available
Authors
J.W. Beeman, A.G. Maule
Behavioral thermoregulation by juvenile spring and fall chinook salmon, Oncorhynchus tshawytscha, during smoltification
Fall chinook salmon evolved to emigrate during the summer months. The shift in the temperature preference we observed in smolting fall chinook but not spring chinook salmon may reflect a phylogenetic adaptation to summer emigration by (1) providing directional orientation as fall chinook salmon move into the marine environment, (2) maintaining optimal gill function during emigration and seawater e
Authors
S.T. Sauter, L.I. Crawshaw, A.G. Maule
Are the endocrine and immune systems really the same thing?
Abstract not available
Authors
C.B. Schreck, A.G. Maule
Mucous lysozyme levels in hatchery coho salmon (Oncorhynchus kisutch) and spring chinook salmon (O. tshawytscha) early in the parr-smolt transformation
Mucous lysozyme concentrations were determined in juvenile coho salmon (Oncorhynchus kisutch) and spring chinook salmon (O. tshawytscha) to establish reference levels during the time associated with the parr-smolt transformation. The first reported naris and vent mucous lysozyme levels are provided for spring chinook salmon and coho salmon. Naris mucous lysozyme levels ranged between 300 and 700 ?
Authors
R. M. Schrock, S.D. Smith, A.G. Maule, S.K. Doulos, J.J. Rockowski
The effects of electroshock on immune function and disease progression in juvenile spring chinook salmon
Although much is known about the effects of electroshock on fish physiology, consequences to the immune system and disease progression have not received attention. Our objectives were to determine the effects of electroshock on selected immune function in juvenile spring chinook salmon Oncorhynchus tshawytscha, the mechanism of any observed alteration, and the effects of electroshock on disease pr
Authors
S. P. VanderKooi, A.G. Maule, C.B. Schreck
Gas bubble disease in resident fish below Grand Coulee Dam. Annual report 1999
Abstract not available
Authors
D.A. Venditti, T.C. Robinson, J.W. Beeman, B.J. Adams, A.G. Maule
Science and Products
Filter Total Items: 65
Gas bubble disease monitoring and research of juvenile salmonids, 1999
Abstract not available
Authors
J.W. Beeman, T.C. Robinson, P.V. Haner, S. P. VanderKooi, A.G. Maule
Gas bubble disease in resident fish below Grand Coulee Dam: final report of research
Fish kills have occurred in the reservoir below Grand Coulee Dam possibly due to total dissolved gas supersaturation (TDGS), which occurs when water cascades over a dam or waterfall. The highest TDGS below Grand Coulee Dam has occurred after spilling water via the outlet tubes, though TDGS from upstream sources has also been recorded. Exposure to TDGS can cause gas bubble disease in aquatic organi
Authors
J.W. Beeman, D.A. Venditti, R.G. Morris, D.M. Gadomski, B.J. Adams, S.J. Vanderkooi, T.C. Robinson, A.G. Maule
Fasting modifies Aroclor 1254 impact on plasma cortisol, glucose and lactate responses to a handling disturbance in Arctic charr
Integrated effects of polychlorinated biphenyl (PCB) and nutritional status on responses to handling disturbance were investigated in the Arctic charr (Salvelinus alpinus). The fish were orally contaminated with Aroclor 1254 and held either with or without food for 5 months before they were subjected to a 10-min handling disturbance. Food-deprived fish were given 0, 1, 10 or 100 mg PCB kg−1 and th
Authors
E.H. Jorgensen, M.M. Vijayan, N. Aluru, A.G. Maule
Antibody-producting cells correlated with body weight in juvenile Chinook salmon Oncorhynchus tshawytscha acclimated to optimal and elevated temperatures
The immune response of juvenile chinook salmon (Oncorhynchus tshawytscha) ranging in weight from approximately 10 to 55 g was compared when the fish were acclimated to either 13 or 21° C. A haemolytic plaque assay was conducted to determine differences in the number of antibody-producing cells (APC) among fish of a similar age but different body weights. Regression analyses revealed significant in
Authors
L.N.M. Harrahy, Carl B. Schreck, Alec G. Maule
Coho salmon Oncorhynchus kisutch strain differences in disease resistance and non-specific immunity, following immersion challenges with Vibrio anguillarum
Two strains of freshwater-reared coho salmon Oncorhynchus kisutch were compared for differences in the activity of selected non-specific immune factors before and after lethal and non-lethal immersion challenges with the marine bacterial pathogen Vibrio anguillarum (Vang). Two disease challenge experiments were performed. The first experimental challenge resulted in no mortality; however, signific
Authors
Shannon K. Balfry, Alec G. Maule, George K. Iwama
Residence times and diel passage distributions of radio-tagged juvenile spring chinook salmon and steelhead in a gatewell and fish collection channel of a Columbia River Dam
The amount of time radio-tagged juvenile spring chinook salmon Oncorhynchus tshawytscha and juvenile steelhead O. mykiss spent within a gatewell and the juvenile collection channel at McNary Dam, Columbia River, USA, was measured to determine the diel passage behavior and residence times within these portions of the juvenile bypass system. The median gatewell residence times were 8.9 h for juvenil
Authors
J.W. Beeman, A.G. Maule
Use of a miniature pressure-sensitive transmitter to determine the in-situ migration depths of juvenile salmonids in relation to total dissolved gas supersaturation
Abstract not available
Authors
J.W. Beeman, A.G. Maule
Behavioral thermoregulation by juvenile spring and fall chinook salmon, Oncorhynchus tshawytscha, during smoltification
Fall chinook salmon evolved to emigrate during the summer months. The shift in the temperature preference we observed in smolting fall chinook but not spring chinook salmon may reflect a phylogenetic adaptation to summer emigration by (1) providing directional orientation as fall chinook salmon move into the marine environment, (2) maintaining optimal gill function during emigration and seawater e
Authors
S.T. Sauter, L.I. Crawshaw, A.G. Maule
Are the endocrine and immune systems really the same thing?
Abstract not available
Authors
C.B. Schreck, A.G. Maule
Mucous lysozyme levels in hatchery coho salmon (Oncorhynchus kisutch) and spring chinook salmon (O. tshawytscha) early in the parr-smolt transformation
Mucous lysozyme concentrations were determined in juvenile coho salmon (Oncorhynchus kisutch) and spring chinook salmon (O. tshawytscha) to establish reference levels during the time associated with the parr-smolt transformation. The first reported naris and vent mucous lysozyme levels are provided for spring chinook salmon and coho salmon. Naris mucous lysozyme levels ranged between 300 and 700 ?
Authors
R. M. Schrock, S.D. Smith, A.G. Maule, S.K. Doulos, J.J. Rockowski
The effects of electroshock on immune function and disease progression in juvenile spring chinook salmon
Although much is known about the effects of electroshock on fish physiology, consequences to the immune system and disease progression have not received attention. Our objectives were to determine the effects of electroshock on selected immune function in juvenile spring chinook salmon Oncorhynchus tshawytscha, the mechanism of any observed alteration, and the effects of electroshock on disease pr
Authors
S. P. VanderKooi, A.G. Maule, C.B. Schreck
Gas bubble disease in resident fish below Grand Coulee Dam. Annual report 1999
Abstract not available
Authors
D.A. Venditti, T.C. Robinson, J.W. Beeman, B.J. Adams, A.G. Maule