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Helfrich, Louis A
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1

Characterization of nutrient leaching rates from settled ra..:

Stewart, Nathan T. ; Boardman, Gregory D. ; Helfrich, Louis A.
Aquacultural Engineering.  35 (2006)  2 - p. 191-198 , 2006
Link: https://doi.org/10.1016/..
 
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2

Treatment of rainbow trout (Oncorhynchus mykiss) raceway ef..:

Stewart, Nathan T. ; Boardman, Gregory D. ; Helfrich, Louis A.
Aquacultural Engineering.  35 (2006)  2 - p. 166-178 , 2006
Link: https://doi.org/10.1016/..
 
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3

Comparison of Water Quality and Rainbow Trout Production in..:

Clark, Michael L. ; Helfrich, Louis A.
North American Journal of Aquaculture.  68 (2006)  1 - p. 41-46 , 2006
Link: https://doi.org/10.1577/..
 
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4

Live Transport of Striped Bass and Rainbow Trout Using a Hi..:

Helfrich, Louis A. ; Bark, Raymond ; Liston, Charles R...
Journal of the World Aquaculture Society.  35 (2004)  2 - p. 268-273 , 2004
Link: https://doi.org/10.1111/..
 
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5

Plasma Cortisol Stress Response of Juvenile Chinook Salmon ..:

Weber, Edward D. ; Borthwick, Sandra M. ; Helfrich, Louis A.
North American Journal of Fisheries Management.  22 (2002)  2 - p. 563-570 , 2002
Link: https://doi.org/10.1577/..
 
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6

Survival and Injury of Splittail and Chinook Salmon Passed ..:

Helfrich, Louis A. ; Liston, Charles R. ; Mefford, Brent.
North American Journal of Fisheries Management.  21 (2001)  3 - p. 616-623 , 2001
Link: https://doi.org/10.1577/..
 
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7

Anadromous Salmonid Passage and Video Image Quality under I..:

Hiebert, Steve ; Helfrich, Louis A. ; Weigmann, Diana L..
North American Journal of Fisheries Management.  20 (2000)  3 - p. 827-832 , 2000
Link: https://doi.org/10.1577/..
 
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8

Impacts of Trout Culture Effluent on Water Quality and Biot..:

Selong, Jason H. ; Helfrich, Louis A.
The Progressive Fish-Culturist.  60 (1998)  4 - p. 247-262 , 1998
Link: https://doi.org/10.1577/..
 
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9

Off-season spawning of sunshine bass (Morone chrysops×M. sa..:

Tate, Andrew E. ; Helfrich, Louis A.
Aquaculture.  167 (1998)  1-2 - p. 67-83 , 1998
Link: https://doi.org/10.1016/..
 
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10

Determination of sex and maturational status of striped bas..:

Blythe, Bill ; Helfrich, Louis A. ; Beal, W.E...
Aquaculture.  125 (1994)  1-2 - p. 175-184 , 1994
Link: https://doi.org/10.1016/..
 
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11

Sex Steroid Hormone and Vitellogenin Levels in Striped Bass..:

Blythe, William G. ; Helfrich, Louis A. ; Sullivan, Craig V.
General and Comparative Endocrinology.  94 (1994)  1 - p. 122-134 , 1994
Link: https://doi.org/10.1006/..
 
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12

Sustaining America's Aquatic Biodiversity - Crayfish Biodiv..:

Helfrich, Louis A ; Prysby, Michelle D
Publication (Virginia Cooperative Extension).  , 2020
Link: http://hdl.handle.net/10..
 
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13

Sustaining America's aquatic biodiversity. Selected freshwa..:

Ney, John, J ; Helfrich, Louis A
Publication (Virginia Cooperative Extension).  , 2020
Link: http://hdl.handle.net/10..
 
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14

Sustaining America's Aquatic Biodiversity Why is Aquatic bi..:

Helfrich, Louis A ; Neves, Richard J ; Parkhurst, James A
Publication (Virginia Cooperative Extension).  , 2019
Link: http://hdl.handle.net/10..
 
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15

Sustaining America's biodiversity. What is aquatic biodiver..:

Helfrich, Louis A ; Neves, Richard J ; Parkhurst, James A
Publication (Virginia Cooperative Extension).  , 2019
Link: http://hdl.handle.net/10..
 
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