Luke-Roy-Auburn-Fisheries-Head-Shot-Photo-square-2018

Luke Roy

Extension Professor, Assistant School Director of AFFC Operations

School of Fisheries, Aquaculture & Aquatic Sciences

(334) 624-4016 

  royluke@auburn.edu 

  

Get In Touch

Address:
Alabama Fish Farming Center
529 S. Centreville Street
Greensboro, AL 36744

Biography

EDUCATION

  • 2006 Ph.D., Fisheries and Aquaculture, Auburn University
  • 2002 M.S., Soil and Water Science, University of California, Riverside
  • 2000 B.S., Environmental Science and Geographical Information Systems, Samford University

PROFESSIONAL EXPERIENCE

  • October 2023 – present Extension Professor, Auburn University
  • January 2017 – September 2023 Associate Extension Professor
  • June 2013 – January 2017 Extension Aquaculture Specialist, University of Arkansas, Pine Bluff
  • August 2006 – May 2013 Research Fellow, Auburn University

HONORS AND AWARDS

  • 2020 Dean’s Award for Excellence in Extension and Outreach, College of Agriculture, Auburn University
  • 2018 Editor’s Choice Paper, Journal of the World Aquaculture Society (Volume 49, Issue 4) for Economics of alternative catfish production technologies
  • 2016 Editor’s Choice Paper, Journal of the World Aquaculture Society (Volume 47, Issue 2) for A Fish of Weedy Waters: Golden Shiner Biology and Culture
  • 2016 Certificate of Appreciation, U.S. Aquaculture Society, for Outstanding Service as a member of the USAS Board of Directors
  • 2015 Best Reviewer Award, In recognition of meritorious service as an expert peer reviewer. Journal of the World Aquaculture Society
  • 2012 AFBI Leadership Award, In Support of Research and Field Trial Coordination, Aquaculture & Fisheries Business Institute, Auburn University
  • 2012 College of Agriculture Project Team Award, “Pond to Plate” Team, College of Agriculture, Auburn University
  • 2005 2nd Place Award for Best Student Oral Presentation, Annual Meeting of the World Aquaculture Society, Bali, Indonesia
  • 2000 Brakefield Award in Biology, In recognition of excellence in the field of biology in terms of scholarship, interest in the study of the life sciences, and enthusiasm for biological investigation, Samford University

PROFESSIONAL AFFILIATIONS

  • Catfish Farmers of America
  • World Aquaculture Society (U.S. Chapter; Latin American & Caribbean Aquaculture Chapter)
  • Alabama Inland Shrimp Producers Association
  • National Aquaculture Association
  • American Fisheries Society (Fish Culture Section, Alabama Chapter of AFS)

Research

RESEARCH ACTIVITIES

My research activities are most often driven by the immediate needs of Alabama commercial aquaculture, in response to emerging industry and stakeholder issues. Being stationed off campus, in the heart of the Alabama catfish and inland marine shrimp industries, I am deeply involved in the transfer of emerging technology to fish producers and research demonstrations on commercial farms. Aquaculture production using traditional and alternative production technology, water quality, and aquatic animal nutrition are the primary focus areas of my research program. While I have worked with catfish and marine shrimp most often, I have conducted research with other commercially important species including largemouth bass, bluegill, blue crab, golden shiners, and several other freshwater and marine species. In addition to research activities, my laboratory provides field and logistical support to graduate students, scientists, and faculty conducting applied research on commercial farms in west Alabama.

Publications

  • Hess HN, Strader ME, Montague HR, Bruce TJ, Aguilar G, Sørensen S, Jenkins LE, Roy LA, Dunham RA, Butts IAE. 2024. Molecular biomarkers for sperm quality in an economically important fish: blue catfish, Ictalurus furcatus. Aquaculture 579(2024):740220.
  • Weldon A, Davis DA, Rhodes M, Morey A, Isassonova D, Roy LA. 2023. Use of genetically modified canola oil as a replacement for fish oil in practical diets of whiteleg shrimp Litopenaeus vannamei reared in green water conditions. Aquaculture Research. 23:2999827.
  • Pimentel OALF, Roy LA, Dos Santos EP, de Oliveira VQ, Brito LO. 2023. Penaeus vannamei inland farming: perspectives and opinions. Reviews in Aquaculture. 15:1267-1273.
  • Kelly AM, Renukdas N, Barnett LM, Beck BH, Abdelrahman HA, Roy LA. 2023. High doses of kaolin clay do not adversely affect survival or tissue histology of commercial baitfish and sportfish species treated prophylactically to prevent columnaris (Flavobacterium covae). Veterinary Sciences. 10:441.
  • Tuttle JT, Bruce TJ, Abdelrahman JA, Roy LA, Butts IAE, Beck BH, Kelly AM. 2023. Investigating the ability of Edwardsiella ictaluri and Flavobacterium covae to persist within commercial catfish pond sediments under laboratory conditions. Pathogens. 12:871.
  • Strebel L, Nguyen K, Araujo A, Corby T*, Rhodes M, Beck BH, Roy LA, Davis DA. 2023. On demand feeding and the response of Pacific white shrimp (Litopenaeus vannamei) to varying dietary protein levels in semi-intensive pond production. Aquaculture. 574(15):739698.
  • Tuttle JT, Bruce TJ, Abdelrahman JA, Roy LA, Butts IAE, Beck BH, Kelly AM. 2023. Persistence of virulent Aeromonas hydrophila isolate in pond sediments from commercial catfish ponds: a laboratory study. Veterinary Sciences. 10(3):236.
  • Montague HR, Hess HN, Tackett M, Britt SL, Lawson LL, Aguilar GL, Jenkins LE, Roy LA, Holland LW, Dunham RA, Litvak MK. 2023. In vitro fertilization with frozen-thawed blue catfish, Ictalurus furcatus, sperm and implications for gene banking. Aquaculture. 574 (15):739611.
  • Aguilar GL, Sakmar J, Nicholls A, Litvak MK, Hess HN, Bruce TJ, Montague HR, Kelly AM, Roy LA, Bernal MA, Politis SN, Butts IAE. 2023. Effects of temperature and subspecies during critical early life history stages of largemouth bass (Micropterus salmoides). Aquaculture. 570(2023):739350.
  • Hussain AS, Fogelman KJ, Abdelrahman HA, Roy LA, Stoeckel JA. 2023. Relationship between aerobic scope and upper thermal limits of Pacific white shrimp (Litopenaeus vannamei) in low-salinity culture systems. Aquaculture. 569(2023):739402.
  • Abdelrahman HA, Hemstreet WB, Roy LA, Hanson TR, Beck BH, Kelly AM. 2023. Epidemiology and economic impact of disease-related losses on commercial farms: a seven-year case study from Alabama, USA. Aquaculture. 566(2023):739206.
  • Hernández DP, Abdelrahman HA, Galkanda-Arachchige, Kelly AM, Butts IAE, Beck BH, Roy LA. 2023. Evaluation of aqueous magnesium concentration on performance of Pacific white shrimp (Litopenaeus vannamei) cultured in low salinity water of west Alabama, USA. Aquaculture. 565(2023):739133.
  • Tuttle JT, Smith MA, Roy LA, Jones M, Lochmann R, Kelly AM. 2022. Effects of different feeding regimes on growth rates and fatty acid composition of largemouth bass Micropterus nigricans at high water temperatures. Animals. 2022 (12):2797.
  • Hegde S, Kumar G, Engle C, Hanson TA, Roy LA, van Senten J, Johnson J, Avery J, Aarattuthodi S, Dahl S, Dorman L, Peterman M. 2022. Economic impact assessment of the U.S. catfish industry. Aquaculture Economics and Management, 26(4):384-414.
  • Hegde S, Kumar G, Engle C, Hanson TA, Roy LA, Cheatham M, Avery J, Aarattuthodiyil S, van Senten J, Johnson J, Wise D, Dahl S, Dorman L, Peterman M. 2022. Technological progress in the U.S. catfish industry. Journal of the World Aquaculture Society. 53:367-383.
  • Pattillo DA, Hager JV, Cline DJ, Roy LA, Hanson TR. 2022. System design and production practices of aquaponic stakeholders. PLoS ONE. 17(4): e0266475.
  • Fantini LE, Smith MA, Jones M, Roy LA, Lochmann R, Kelly AM. 2021. Growth parameters in northern largemouth bass Micropterus salmoides salmoides raised near their upper thermal tolerance for 28 days. Aquaculture Reports. 21(2021):100845.
  • Roy LA, Rawles SD, Quintero HE, Kelly AM, Park J, Webster CD. 2022. Weight loss, survival, and fatty acid composition in over-wintered juvenile Coppernose Bluegill (Lepomis macrochirus purpurescens) cultured in outdoor tanks and fed different feeding regimens. North American Journal of Aquaculture, 84(1):42-52.
  • Creel JD, Hanson TR, Roy LA, Sammons S. 2021. Age determination of hybrid catfish Ictalurus punctatus ♀ x Ictalurus furcatus ♂ and Channel Catfish Ictalurus punctatus from commercial catfish farms. North American Journal of Aquaculture. 83(4):283-289.
  • Reis J, Quintero HE, Roy LA. 2022. Feeding practices for automated systems. Chapter 13, Pages 357-373 in: The Shrimp Book II. V. Alday-Sanz, Editor. 5m Publishing. Sheffield, UK. 643 pp.
  • Clements SA, Davis B, Dorr BS, Hanson-Dorr KC, Roy LA, Kelly AM, Engle C, Barras SC. Scaup depredation on Arkansas baitfish and sportfish aquaculture. 2021. Wildlife Society Bulletin. 45(3):517-528.
  • Webster CD, Rawles SD, Kelly AM, Roy LA, Rosentrater K. 2021. Juvenile bluegill (Lepomis macrochirus) can be fed diets without marine fish meal without adverse effects on growth, survival, diet utilization, and body composition. Aquaculture Nutrition. 27(4):1144-1159.
  • Malecki JK, Roy LA, Arias CR, Lange MD, Beck BH, Truong NH, Hanson TR. 2021. Bioeconomics of a Flavobacterium columnare vaccine pond trial with Channel Catfish Ictalurus punctatus. North American Journal of Aquaculture. 83(3):207-217.
  • Quintero H, Kelly AM, Roy LA. 2021. Evaluation of split-pond systems for production of channel catfish fingerlings. Journal of the Southeastern Association of Fish and Wildlife Agencies. 7:1-8.
  • Engle CR, Clements SA, Dorr BS, Davis JB, Roy LA, Kelly AM. 2021. Economic effects of predation by scaup on baitfish/sportfish farms. Journal of the World Aquaculture Society. 52:329-346.
  • Clements SA, Dorr BS, Davis JB, Dorr BS, Roy LA, Engle CR, Hanson-Dorr KC, Kelly AM. 2021. Distribution and abundance of scaup using baitfish and sportfish farms in eastern Arkansas. Journal of the World Aquaculture Society. 52:347-361.
  • Antony J, Reddy AK, Sudhagar A, Krishna VH, Roy LA. 2021. Osmoregulation and production characteristics of juvenile cobia, Rachycentron canadum (Linnaeus, 1766) in inland saline groundwater. Journal of the World Aquaculture Society. 52(1):155-170.
  • Kumar G, Engle C, Avery J, Dorman L, Whitis G, Roy LA, Xie L. 2021. Characteristics of early adoption and non-adoption of alternative catfish production technologies in the U.S. Aquaculture Economics and Management. 25(1):70-88.
  • Engle CR, Christie TW, Dorr BS, Kumar G, Davis JB, Roy LA, Kelly AM. 2021. Principal economic effects of cormorant predation on catfish farms. Journal of the World Aquaculture Society. 52(1):41-56.
  • Galkanda-Arachchige H, Roy LA, Davis DA. 2021. The effects of magnesium concentration in low salinity water on growth of Pacific white shrimp (Litopenaeus vannamei). Aquaculture Research. 52(2):589-597.
  • Christie TW, Dorr BS, Davis JB, Roy LA, Engle CR, Hanson-Dorr KC, Kelly AM. 2021. Food habits of wintering double-crested cormorants in the Mississippi Delta. Food Webs. 26(2021):e000185.  https://doi.org/10.1016/j.fooweb.2020.e00185
  • Roy LA, Teichert-Coddington D, Dahl S, Beck BH, Shoemaker CA, Whitis GN, James J. 2020. On-farm evaluation of three different hatchery sources of Pacific white shrimp (Litopenaeus vannamei) cultured in on-levee tanks in low salinity waters of west Alabama. Journal of Applied Aquaculture. 20(3):193-204.
  • Hanson TR, Bott LB, Whitis GN, Chappell JA, Kelly AM, Roy LA. 2020. Research verification of single- and multiple-batch production practices at two Channel Catfish Ictalurus punctatus farms in west Alabama. North American Journal of Aquaculture. 82(4):377-386.
  • Galkanda-Arachchige H, Roy LA, Davis DA. 2020. Evaluation of an alternative salt mixture to grow Pacific white shrimp (Litopenaeus vannamei) in inland low salinity water. Aquaculture Research. 51(9):3540-3550.
  • Galkanda-Arachchige H, Roy LA, Dahl S, James J, Kelly AM, Davis DA. 2020. Laboratory and on-farm evaluation of alternative salt mixtures for salinity acclimation and nursery phase of Pacific white shrimp (Litopenaeus vannamei). Aquaculture Research. 51(8):3460-3471.
  • Roy LA, Teichert-Coddington D, Beck BH, Dahl S, James J, Guo J, Davis DA. 2020. Evaluation of stocking density and fish meal inclusion level for intensive tank production of Pacific white shrimp Litopenaeus vannamei in low salinity water.  North American Journal of Aquaculture. 82(3):345-353.
  • Clements SA, Dorr BS, Davis B, Roy LA, Engle C, Hanson-Dorr KC, Kelly AM. 2020. Diets of scaup occupying baitfish and sportfish farms in Eastern Arkansas. Food Webs. 23(2020):e00141.  (open access: https://doi.org/10.1016/j.fooweb.2020.e00141)
  • Guo J, Huang Y, Arachchige HG, Salze G, Roy LA, Davis DA. 2020. Use of plant-based protein concentrates as a replacement for fishmeal in practical diets for the Pacific white shrimp (Litopenaeus vannamei) reared under high stocking density and low salinity conditions. Aquaculture Nutrition. 26:225-232.
  • Roy LA, Rawles S, Kelly AM, Stone N, Park J, Webster CD. 2019. The effects of different winter feeding regimens on growth, survival, and fatty acid composition of fathead minnows Pimephales promelas and golden shiners Notemigonus crysoleucas. North American Journal of Aquaculture. 81(3):189-200.
  • Quintero HE, Roy LA, Kelly AM, Park J, Heikes D. 2019. Comparison of different pond production systems for raising largemouth bass, Micropterus salmoides. Journal of the World Aquaculture Society. 50(3):622-632.
  • Roy LA, Rawles SD, Kelly AM, Stone N, Haukenes A, Webster C. 2019. Feeding regime has little impact on weight loss of Hybrid Crappies, Pomoxis spp. and Redear Sunfish at a low (winter) water temperature when fed a noncommercial diet of blood worms. North American Journal of Aquaculture. 81(2):140-152.
  • Stone NM, Roy LA, Park ED. 2019. Fathead minnow reproduction: Implications for commercial culture. Journal of the World Aquaculture Society. 50(2):267-298.
  • Roy LA, Hanson TR, Bott LB, Chappell J. 2019. Production and economic comparison of single versus multiple harvests of hybrid catfish in a commercial in-pond raceway system in west Alabama targeting two market outlets. Journal of the Southeastern Association of Fish and Wildlife Agencies. 6:58-66.
  • Soller F, Roy LA, Davis DA. 2019. Replacement of fish oil in plant based diets for Pacific white shrimp (Litopenaeus vannamei) by stearine fish oil and palm oil. Journal of the World Aquaculture Society. 50(1):186-203.
  • Kumar G, Engle CR, Hanson TR, Tucker CS, Brown TW, Bott LB, Roy LA, Boyd CE, Recsetar MS, Park J, Torrans EL.  2018. Economics of alternative catfish production technologies. Journal of the World Aquaculture Society. 49(6):1039-1057.
  • Pine HJ, Jescovitch LN, Roy LA, Boyd CE, Davis DA, Brown TW. 2018. Growth of Pacific white shrimp, Litopenaeus vannamei, cultured on inland low salinity pond soils. North American Journal of Aquaculture. 80(3):273-277.
  • Roy LA, Rawles SD, Kelly AM, Webster CD, Stone N, Haukenes A. 2017.  Effect of winter feeding frequency on growth, survival, and fatty acid metabolism of juvenile bluegill (Lepomis macrochirus) and hybrid bluegill (L. cyanellus x L. macrochirus). Aquaculture. 479:780-789.
  • Park J, Roy LA, Renukdas N, Luna T. 2017. Evaluation of a biofloc system for intensive culture of fathead minnows Pimephales promelas. Journal of the World Aquaculture Society. 48(4):592-601.
  • Park J, Renukdas N, Luna T, Roy LA. 2017. Maximum yield approximation and size distribution patterns of largemouth bass fingerlings Micropterus salmoides reared in a semi-closed indoor system. Aquaculture Research. 48(3):780-791.
  • Stone NM, Kelly AM, Roy LA. 2016. A fish of weedy waters: golden shiner biology and culture. Journal of the World Aquaculture Society. 47(2):152-200.
  • Brown TW, Mischke CC, Roy LA, Li M. 2016. A length-weight relationship for pond-raised hybrid catfish fingerlings. Journal of the World Aquaculture Society. 47(1):93-96.
  • Bott LB, Roy LA, Hanson TR, Chappell JA, Whitis GN. 2015. Research verification of production practices at an intensively aerated hybrid catfish operation in west Alabama. North American Journal of Aquaculture. 77(4):460-470.
  • Park J, Renukdas N, Luna T, Roy LA. 2015. The effect of stocking density on size dispersal and growth performance of largemouth bass fingerlings in a recirculating system. Journal of the World Aquaculture Society. 46(3):283-291.
  • Gutiérrez-Salazar GJ, Galaviz-Silva L, Guzmán-Sáenz FM, Hernández-Acosta M, Roy LA. 2015. Enteritis hemocítica en Litopenaeus vannamei (Crustácea Decápoda) en cultivo de baja salinidad en Tamaulipas, México. Hidrobiológica. 25(1):139-145.
  • Antony J, Harikrishna V, Saharan N, Reddy AK, Chadha NK, Lakra WS, Roy LA. 2015. Effects of salinity and Na+/K+ ratio on osmoregulation and production of black tiger prawn (P. monodon, Fabricius, 1798) juveniles reared in inland saline water. Journal of the World Aquaculture Society. 46(2):171-182.
  • Park J, Heikes D, Recsetar M, Roy LA. 2014. Performance evaluation and engineering considerations for a modular- and culvert-based paddle wheel water circulator for split-pond systems. Aquacultural Engineering. 61:1-8.
  • Jirsa D, Davis DA, Barrows F, Roy LA, Drawbridge M. 2014. Response of White Seabass, Atractoscion nobilis to practical diets with varying levels of protein. North American Journal of Aquaculture. 76(1):24-27.
  • Hu B, Roy LA, Davis DA. 2013. Correlations of xanthophylls in catfish fillets, plankton, shad and snails in catfish production ponds in west Alabama. Aquaculture. 402-403:46-49.
  • Zhu X, Davis DA, Roy LA, Samocha TM, Lazo JP. 2013. Response of the Pacific white shrimp (Litopenaeus vannamei) to three sources of solvent extracted soybean meal. Journal of the World Aquaculture Society. 44(3):396-404.
  • Perez-Velazquez M, González-Félix M, Davis DA, Roy LA. Zhu X. 2013. Studies on the thermal and haline influences on growth and survival of Litopenaeus vannamei and Litopenaeus setiferus. Journal of the World Aquaculture Society. 44(2):229-238.
  • Roy LA, Whitis GN, Walton WC. 2012. Demonstration of blue crab Callinectes sapidus culture in inland low salinity waters of west Alabama. North American Journal of Aquaculture. 74(4):453-456.
  • Perez-Velazquez M, Davis DA, Roy LA, González-Félix M. 2012. Effect of water temperature and Na+:K+ ratio on physiological and production parameters of Litopenaeus vannamei in low salinity water. Aquaculture. 342-343:13-17.
  • Roy LA, Davis DA, Whitis GN. 2012. Effect of feeding rate and pond primary productivity on growth of Litopenaeus vannamei reared in inland saline waters of west Alabama. North American Journal of Aquaculture. 74(1):20-26.
  • Samocha TM, Davis DA, Roy LA, Carpenter B, Bullis RA. 2011. The effect of non-marine HUFA supplementation with fish oil removal on growth and survival of the Pacific white shrimp, Litopenaeus vannamei. Aquaculture Nutrition.17:518-525.
  • Paz P, Roy LA, Davis DA, Quintero HE. 2011. Survival of post-larval Litopenaeus vannamei following acclimation to low salinity waters at different temperatures. Journal of the World Aquaculture Society. 42(4):575-579.
  • Ghanawi J, Roy LA, Davis DA, Saoud IP. 2011. Effects of dietary lipid levels on growth performance of marbled spinefoot rabbitfish Siganus rivulatus. Aquaculture. 310:395-400.
  • Roy LA, Davis DA, Saoud IP, Boyd CA, Pine HJ, Boyd CE. 2010. Shrimp culture in inland low salinity waters. Reviews in Aquaculture. 2:191-208.
  • Zhou P, Davis DA, Lim C, Yildirim-Aksoy M, Paz P, Roy LA. 2010. Pond demonstration of production diets using high levels of distiller’s dried grains with solubles with or without lysine supplementation for channel catfish, Ictalurus punctatus. North American Journal of Aquaculture. 72:361-367.
  • Quintero HE, Roy LA. 2010. Practical Feed Management in Semi-Intensive Systems for Shrimp Culture. pp. 443-454, Book chapter, In: The Shrimp Book. Victoria Alday-Sanz, Editor. Nottingham University Press. Nottingham, UK. 920 pp.
  • Roy LA, Davis DA. 2010. Requirements for the culture of the Pacific white shrimp, Litopenaeus vannamei, in low salinity waters: water modification and nutritional strategies for improving production. pp. 61-78 In: (Editors) L. E. Cruz-Suárez, D. Ricque-Marie, M. Tapia-Salazar, M.G. Nieto-López, D. A. Villareal-Cavazos, and J. Gamboa-Delgado. Avances en Nutrición Acuícola X. Memorias del Decimo Simposio Internacional de Nutrición Acuícola. Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México. Nov. 8-10.
  • Roy LA, Davis DA,Whitis GN. 2009. Pond-to-pond variability in post-larval shrimp, Litopenaeus vannamei, survival and growth in inland low salinity waters of west Alabama. Aquaculture Research. 40:1823-1829.
  • Roy LA, Davis DA, Nguyen TN, Saoud IP. 2009. Supplementation of chelated magnesium to diets for Litopenaeus vannamei reared in low salinity waters of west Alabama. Journal of the World Aquaculture Society. 40(2):248-254.
  • Roy LA, Bordinhon A, Sookying D, Davis DA, Brown TW, Whitis GN. 2009. Demonstration of alternative feeds for Litopenaeus vannamei reared in low salinity waters of west Alabama. Aquaculture Research. 40:496-503.
  • Davis DA, Roy LA, Sookying D. 2008. Improving the effectiveness of shrimp feeds. pp. 271-280 In: (Editors) L. E. Cruz Suárez, D. Ricque Marie, M. Tapia-Salazar, M.G. Nieto-López, D.A. Villareal-Cavazos, J. P. Lazo, and M.T. Viana. Avances en Nutrición Acuícola IX. Memorias del Noveno Simposio Internacional de Nutrición Acuícola. Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México. Nov. 24-26.
  • Saoud IP, Roy LA, Davis DA. 2007. Supplementation of chelated potassium and arginine to diets of Litopenaeus vannamei reared in low salinity waters of west Alabama. North American Journal of Aquaculture. 69:265-270.
  • Roy LA, Saoud IP, Davis DA, Henry RP. 2007. Branchial carbonic anhydrase activity and ninhydrin positive substances in the Pacific white shrimp, Litopenaeus vannamei, acclimated to low and high salinities. Comparative Biochemistry & Physiology. 147A:404-411.
  • Roy LA, Davis DA, Saoud IP, Henry RP. 2007. Supplementation of potassium, magnesium, and sodium chloride in practical diets for the Pacific white shrimp, Litopenaeus vannamei, reared in low salinity water. Aquaculture Nutrition. 13(2):104-113.
  • Roy LA, Davis DA, Saoud IP, Henry RP. 2007. Effects of varying levels of aqueous potassium and magnesium on survival, growth, and respiration in the Pacific white shrimp, Litopenaeus vannamei, reared in low salinity water. Aquaculture. 262(2-4):461-469.
  • Roy LA, Davis DA, Saoud IP. 2006. Effect of lecithin and cholesterol supplemented to practical diets for Litopenaeus vannamei reared in low salinity water. Aquaculture. 257(1-4):446-452.
  • Saoud IP, Davis DA, Roy LA, Phelps R. 2005. Evaluating the benefits of size sorting tilapia fry before stocking. Journal of Applied Aquaculture. 17(4):71-84.
  • Sapozhnikova Y, Zubcov N, Hungerford S, Roy LA, Boicenco N, Zubcov E, Schlenk D. 2005. Evaluation of pesticides and metals in fish of the Dniester River, Moldova. Chemosphere. 60(2):196-205.
  • Roy LA, Steinert S, Greenstein D, Bay S, Sapozhnikova Y, Bawardi O, Leifer I, Schlenk D. 2003. Biochemical effects of petroleum exposure in hornyhead turbot (Pleuronichthys verticalis) exposed to a gradient of sediments collected from a natural petroleum seep in CA, USA. Aquatic Toxicology. 65(2):159-169.
  • Roy LA, Armstrong JL, Sakamoto K, Steinert S, Perkins E, Johnson L, Lomax D, Schlenk D. 2003. The relationships of biochemical endpoints to histopathology, and population metrics in feral flatfish species collected near the municipal outfall of Orange County, CA. Environmental Toxicology and Chemistry. 22(6):1309-1317.

EXTENSION ACTIVITIES

My extension activities focus on providing support to commercial fish and shrimp farmers in west Alabama. My primary extension programs include catfish aquaculture and inland low salinity aquaculture. In my role as a fisheries extension faculty member stationed at the Alabama Fish Farming Center, I serve as a liaison between the fish farming industry and faculty on campus at Auburn University. The primary goal of my program is to enhance the biological and economical sustainability of Alabama and U.S. catfish farming industries. I grew up in Uruguay, South America and in addition to promoting domestic aquaculture production in the U.S. I also have interests in rural aquaculture community development, particularly in Latin America.

Extension Publications & Popular Articles

  • Palmer J, James J, Kelly A, Roy L. 2023. Hybrids missed in seining bringing lower prices, study shows. The Catfish Journal. 37(3):11.

  • Palmer J, James J, Kelly, Roy L. 2023. Quantifying the age structure of carry-over hybrid catfish following commercial harvest: preliminary results. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):1-2.

  • Palmer J, James J, Kelly A, Roy L. 2023. An upcoming channel catfish study seeks to examine the “Big Fish” issue in multi-batch production systems in west Alabama. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):5.

  • Montague HM, Tackett VM, Lawson LL, Roy LA, Dunham RA, Butts IAE. 2023. Proof of concept: frozen sperm shows promise for catfish hatchery production. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):6-7.

  • Roy L, Smith M, Dorr B, Kelly A, Burr P, Engle C, van Senten J. 2023. Southern Regional Aquaculture Center funding has been secured to evaluate the impact of waterbird depredation on catfish farms in west Alabama and east Mississippi. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):12-13.

  • Fantini-Hoag L, James J, Hernández DP, Abdelrahman HA, Kelly AM, Davis DA, Bruce TJ, Dahl S, Beck BH, Lawson L, Roy LA. 2023. Strategies for channel catfish winter feeding. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):14-16.

  • Hussain AS, Fogelman KJ, Abdelrahman HA, Roy LA, Stoeckel JA. 2023. Thermal tolerance study for the Pacific white shrimp. Alabama Cooperative Extension Newsletter. Fish Farming News. 2023(1):20-24.

  • Weldon A, Davis DA, Roy LA. 2022. Shrimp in Alabama. Alabama Cooperative Extension Fact Sheet. ANR-1028. 4pp. https://www.aces.edu/blog/topics/coastal-programs/shrimp-in-alabama/

  • Pattillo DA, Cline DJ, Hager JV, Roy LA, Hanson TR. 2022. Challenges experienced by aquaponic hobbyists, producers, and educators. Journal of Extension 60(4): Article 13.

  • Roy L. 2022. Dr. Terry Hanson retires from the School of Fisheries, Aquaculture, and Aquatic Sciences. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):3-4.

  • Kelly A, Roy L. 2022. Ammonia in catfish ponds. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):4-5.

  • Roy L, Kelly A, Dahl S, James J, Hanson T. 2022. Elevated water temperatures observed in commercial catfish ponds in 2022 compared to 2021. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):6-7.

  • Kelly A, Roy L, James J, Abdelrahman H, Marsh S, Tomasso J. 2022. Physiological effects of commercial harvest and transport of hybrid catfish during warmer and colder months. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):8-9.

  • Tuttle J, Bruce T, Butts I, Roy L, Beck B, Kelly A. 2022. Does virulent Aeromonas hydrophila remain in soils? Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):12-13.

  • Roy L, Bruce T, Kelly A, Davis DA. 2022. Grant dollars secured to study the impact of high-water temperature on growth, digestibility, and immune parameters of channel and hybrid catfish fed different plant and animal protein diets. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):14.

  • Engle C, Kumar G, Christie T, Dorr B, Davis B, Roy L, Kelly A. 2022. Economics of cormorant predation on catfish farms. NWAC News 17(1):4-5

  • Kumar G, Avery J, Hegde S, Aarattuthodi S, Engle C, Hanson T, Roy L, Dahl S, van Senten J, Johnson J, Dorman L, Peterman P. 2022. New study shows industry economic impact near $2 billion. The Catfish Journal 36(1):8, 23.
  • Engle C, Kumar G, Christie T, Dorr B, Davis B, Roy L, Kelly A. 2022. Economics of cormorant predation on catfish farms. NWAC News 17(1):4-5.
  • Wang H, Sheng L, Li X, Yazdi Z, Abdelrahman H, Roy L, Kelly A, Martinez ES, Wang L. 2022. Effect of antibiotics on gut bacteria and antibiotic-resistant genes in channel catfish. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(1):15.
  • Roy L, Palmer J, Kelly A. 2022. Monitoring historically problematic blue-green algae ponds in the spring can be beneficial to commercial catfish producers. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(1):9-10.
  • Pattillo DA, Cline DJ, Hager JV, Roy LA, Hanson TR. 2021. Knowledge levels and training needs of aquaponics stakeholders. Journal of the National Association of County Agricultural Agents. 14(2): 12pp. https://www.nacaa.com/journal/13f2ff94-8c27-4749-bbaf-53d6285bbdd8
  • Pattillo DA, Cline DJ, Hager JV, Roy LA, Hanson TR. 2021. Information accessibility and resource usage by aquaponics stakeholders. Journal of the National Association of County Agricultural Agents. 14(2): 9pp. https://www.nacaa.com/journal/01f83994-2440-4f28-aaa4-d2e384694190
  • Roy L, Weldon A, Kelly A, Bruce TJ. 2021. Managing chloride levels in catfish ponds to prevent nitrite toxicity and brown blood disease. Alabama Cooperative Extension Newsletter. Fish Farming News. 2021(2):10-11.
  • Engle C, Kumar G, Christie T, Dorr B, Davis B, Roy L, Kelly A. 2021. Economics of cormorant predation on catfish farms. The Catfish Journal. 35(1):23.
  • Buley RP, Kelly AM, Roy LA Fernandez-Figueroa EG, Gladfelter MF, Belfiore AP, Wilson AE. 2021. Microcystis blooms in Alabama Aquaculture. Alabama Cooperative Extension Fact Sheet. ANR-2757. 5 pp.
  • Galkanda-Arachchige J, Davis DA, Kelly AM, Roy LA. 2021. Low-cost salt mixtures serve as an alternative to reconstituted sea salts during low salinity acclimation of Pacific white shrimp. Alabama Cooperative Extension Fact Sheet, ANR-2785. 4pp.
  • Hanson T, Roy L, Kelly AM. 2021. 2020 Alabama Farm-Raised Catfish Industry Highlights. Alabama Cooperative Extension Fact Sheet, ANR-2441. 2pp. (revision)
  • Roy LA, Kelly AM. 2021. Antibiotic feeds for catfish farmers. Alabama Cooperative Extension Fact Sheet. ANR-2762. 4pp.
  • Kelly AM, Roy LA. 2021. Using medicated feeds in catfish aquaculture. Alabama Cooperative Extension Fact Sheet. ANR-2758. 3pp.
  • Kelly AM, Roy LA. 2021. The use of diuron to control off-flavor in Alabama catfish production ponds. Alabama Cooperative Extension Fact Sheet. ANR-2744. 2pp.
  • Roy L, Kelly A, James J, Hanson T. 2021. Pond renovation of commercial catfish ponds: Why is it important? Alabama Cooperative Extension Newsletter. Fish Farming News. 2021(1):5-6.
  • Roy L, Kelly A, James J. 2021. Reviewing the importance of total alkalinity before treating a pond with copper sulfate. Alabama Cooperative Extension Newsletter. Fish Farming News.  2021(1):3-4.
  • Roy L, Kelly A. 2020. The Alabama Fish Farming Center stays busy serving farmers despite COVID-19. Alabama Cooperative Extension Newsletter. Fish Farming News. 2020(2):1.
  • Hanson T, Roy L, Kelly A. 2020. CFAP – Coronavirus Food Assistance Program. Alabama Cooperative Extension Newsletter. Fish Farming News. 2020(2):4-5.
  • Kelly A, Roy L. 2020. Managing algal populations and off-flavor in channel catfish ponds using weekly low dosages of copper sulfate. Alabama Cooperative Extension Newsletter. Fish Farming News. 2020(2):6.
  • Engle C, Kumar G, Christie T, Dorr B, Davis B, Roy L, Kelly A. 2021. Economics of cormorant predation on catfish farms. The Catfish Journal. 35(1):23.
  • Roy LA, Davis DA. 2020. Tank systems on shrimp farms are effective for Extension demonstrations in aquaculture. Journal of Extension. 58(6): Article 58-6tt6.
  • Roy L, Kelly A. 2020. The Alabama Fish Farming Center stays busy serving farmers despite COVID-19. The Catfish Journal. 34(6):15.
  • Kelly AM, Roy LA. 2020. Submission of a fish sample for diagnostic analyses. Alabama Cooperative Extension Fact Sheet. ANR-2655. 3pp. https://www.aces.edu/wp-content/uploads/2020/04/ANR-2655 ProperSubmissionFishSamples_042020L-G.pdf
  • Christie T, Dorr B, Roy L, Kelly A, Engle C, Burr P, Davis B, van Senten J. 2020. Cormorant predation of commercial catfish aquaculture in the Mississippi Delta. Virginia State & Polytechnic Institute Cooperative Extension Fact Sheet. AAEC-231. https://www.pubs.ext.vt.edu/AAEC/AAEC-231/AAEC-231.html
  • Malecki J, Hanson T, Roy L, Beck B. 2020. Bioeconomic analysis of Flavobacterium columnare vaccine pond trials for channel catfish Ictalurus punctatus. Fish Farming News. 2020(1):17-19.
  • Amacker C, Smith M, Dorr B, Roy L. 2020. New research estimating the impact of avian predators on low salinity shrimp aquaculture. Fish Farming News. 2020(1):15-16.
  • Creel D, Hanson T, Roy L, Sammons S. 2020. Determination of the age of hybrid catfish and channel catfish from commercial fish farms and evaluation of three management strategies to control “Big Fish”. Fish Farming News. 2020(1):11-13.
  • Kelly A, Roy L. 2020. The proper use of diuron. Fish Farming News. 2020(1):3.
  • Roy LA, Kelly AM. 2019. Alabama Fish Farming Center serves aquaculture industry, Alabama Cooperative Extension Fact Sheet. ANR-2601. 2pp. https://www.aces.edu/wp-content/uploads/2019/12/ANR-2601_AFFC_111819L-G.pdf
  • Kelly AM, Roy LA. 2019. Proper use of antibiotic feed for catfish production. Fish Farming News. 2019(2):1-3.
  • Roy LA, Kelly AM. 2019. Management of off-flavor in commercial catfish ponds before winter temperatures arrive. Fish Farming News. 2019(2):3.
  • Kelly AM, Roy LA. 2019. Reminder to obtain 24 (c) labels. Fish Farming News. 2019(2):6.
  • Roy LA, Kelly AM. 2019. Applied research activities at the Alabama Fish Farming Center. Fish Farming News. 2019(2):8-9.
  • Clements S, Dorr B, Engle C, Roy L, Kelly A, van Senten J, Davis B. 2019. The problems of avian predators on fish farms: scaup on baitfish (golden shiner) farms. Virginia State & Polytechnic Institute Cooperative Extension Fact Sheet. AAEC-191P. 2pp. https://www.pubs.ext.vt.edu/AAEC/AAEC-191/AAEC-191.html
  • Roy L. 2019. Bill Hemstreet retiring after 34 years of exemplary service at the Alabama Fish Farming Center. Fish Farming News. 2019(1):1-2.
  • Roy LA, Hemstreet B, Veum LM, Bader T. 2019. The intersection of virulent Aeromonas hydrophila and fish-eating bird harassment programs on commercial catfish farms. Fish Farming News. 2019(1):2-3.
  • Creel D, Hanson T, Sammons S, Roy LA, Bott L. 2019. Evaluating the age of “big fish” and the economic cost to the west Alabama catfish industry. Fish Farming News. 2019(1):8-9.
  • Terhune J, Beck B, James J, Hanson T, Chappell J, Roy LA. 2019. 2017-2018 research update on vaccine tests. Fish Farming News. 2019(1):11-12.
  • Roy LA. 2019. Dr. Anita Kelly joins the Alabama Fish Farming Center. Fish Farming News. 2019(1):14.
  • Roy LA, Teichert-Coddington D, Laramore S , Dahl S, James J, Whitis GN, Beck BH, Shoemaker CA. 2018. Commercial evaluation of a probiotic mixture (Sanolife Pro-W) to enhance survival, growth, and production of the Pacific white shrimp Litopenaeus vannamei cultured in inland ponds of west Alabama and Florida. World Aquaculture. 49(4):42-49.
  • Kelly A, Kearby M, Roy LA. 2018. Lesser scaup predation on baitfish and sportfish farms. Arkansas Cooperative Extension Fact Sheet. FSA 9623. 4pp.
  • Brown TW, Mischke CC, Roy LA, Li M. 2018. A length-weight table for pond-raised hybrid catfish fingerlings. The Catfish Journal. 32(3):10-12.
  • Wilson A, Fernandez E, Buley R, Roy LA. 2018. Is sustainable control of toxic algae a reality for catfish aquaculture? Fish Farming News. 2018(1):7-8.
  • Hanson T, Roy L, Hemstreet W. 2017. Alabama Farm-Raised Catfish Industry Highlights. Alabama Cooperative Extension Fact Sheet. ANR-2441. 2pp.
  • Clements S, Davis B, Dorr B, Hanson-Dorr KC, Roy LA, Kelly AM, Engle C. 2017. Collaborative research on foraging habits and the economic impact of scaup on commercial baitfish and sportfish farms in Arkansas. The Wildlife Society, Southeastern Section Newsletter. 59(3):13.
  • Roy LA, Smith MA. 2017. Feeding strategies for overwintering centrarchids in earthen ponds. Buckeye Aquafarming 2(2):1-2.
  • van Senten J, Engle C, Dey M, Kelly A, Roy L. 2017. Inefficiency factors and economic impact of baitfish and sportfish production. Arkansas Aquafarming. 34(1):6-7.
  • Smith MA, Roy LA. 2017. Growing largemouth bass for food. Arkansas Aquafarming. 34(1):3-4.
  • Quintero H, Park J, Roy L, Kelly A. 2017. Alternative production systems for largemouth bass. Arkansas Aquafarming. 34(1):1-2.
  • Smith MA, Kelly AM, Roy LA. 2017. Know when to purchase your feed trained largemouth bass fingerlings. Buckeye Aquafarming. 2(1):7.
  • Park J, Roy LA, Renukdas N, Luna T. 2017. Evaluating biofloc technology for intensive culture of fathead minnows. Global Aquaculture Advocate. Published online January 30. https://www.aquaculturealliance.org/advocate/evaluating-biofloc-technology-for-intensive-culture-of-fathead-minnows/
  • van Senten J, Engle CR, Kelly AM, Roy LA. 2016. Cost of regulations on producers of baitfish and sportfish in Arkansas. Arkansas Cooperative Extension System Technical Bulletin. ETB261. 10pp.
  • Brown TW, Mischke CC, Roy LA, Li M. 2016. A length-weight relationship for pond-raised hybrid catfish fingerlings. National Warmwater Aquaculture Center Newsletter. 13(1):16-17.
  • van Senten J, Engle C, Kelly A, Roy L. 2016. The cost and impact of regulations on baitfish and sportfish aquaculture. Arkansas Aquafarming. 34(1):1-2.
  • Roy LA, Brown TW. 2016. In-pond raceway systems: Are they a good alternative for U.S. catfish farmers? Arkansas Aquafarming. 33(3):6-7.
  • Clements S, Davis B, Dorr B, Roy L, Kelly A, Engle C. 2016. New study underway to estimate the impact of lesser scaup on Arkansas’ baitfish industry. Arkansas Aquafarming. 33(3):2.
  • Park J, Trevor L, Roy LA, Kelly AM. 2016. Effect of water turnover time on hybrid catfish production and water quality in split ponds. Arkansas Aquafarming. 33(2):1-2.
  • Roy LA, Kearby M, Kelly AM, Smith MA, Park H, Hoy M. 2016. Lesser scaup predation on Arkansas sportfish farms. Arkansas Aquafarming. 33(2):3.
  • Roy LA, Bott LB, Hanson TR, Chappell JA, Powe W. 2016. Commercial implementation of in-pond raceway system: In-pond raceway systems effectively supply niche markets with catfish. Global Aquaculture Advocate. Published online January 18. https://www.aquaculturealliance.org/advocate/commercial-implementation-of-in-pond-raceway-system/
  • Park J, Renukdas N, Luna T, Roy LA, Heikes D. 2015. Biomass density affects bass production, not feed conversion, growth rates in RAS. Global Aquaculture Advocate. 18(6):42-44.
  • Roy LA, Kearby M, Kelly AM, Hoy M. 2015. Predation by lesser scaup on baitfish at commercial farms during winter of 2014. Arkansas Aquafarming. 32(3):1-2.
  • Roy LA, Stone NM, Kelly AM. 2015. Control of bullfrogs and their tadpoles on commercial fish farms. Arkansas Cooperative Extension System Fact Sheet. FSA 9619. 6pp.  https://www.uaex.edu/publications/pdf/FSA-9619.pdf
  • Roy L, Jones S. 2015. Dangerous Fish Hitchhikers. Arkansas Aquafarming. 32(1):3.
  • Stone N, Roy L. 2015. Time to retest your hatchery well? Arkansas Aquafarming. 32(1):4-5.
  • Bott LB, Brown TW, Roy LA, Hanson, TR. 2014. Chemical treatment costs reduced with in-pond raceway systems. Global Aquaculture Advocate. 17(4):62-64.
  • Rhodes M, Yu D, Zhou Y, Roy LA, Hanson TR, Davis DA. 2014. Concentrato de proteína de maíz: Una fuente económica de reemplazo de la harina de pescado en dietas para camarón. Aqua Cultura. 102:32-35.
  • Brown T, Powe W, Roy L. 2014. A trap panel for in-pond raceways to capture escaped catfish. The Catfish Journal. 27(7):21-23.
  • Rhodes M, Yu D, Zhou Y, Roy LA, Hanson TR, Davis DA. 2014. Corn protein concentrate: a cost-effective replacement for fish meal in shrimp diets. AquaFeed: Advances in Processing and Formulation. 6(1):3-9.
  • Roy L, Kelly A, Kearby M, Hoy M. 2014. Collection of lesser scaup on Arkansas baitfish and sportfish farms in early 2014. Arkansas Aquafarming. 31(1):2.
  • Roy L, Kelly A, Engle C, Stone N. 2013. Unusual fish losses observed by Arkansas Baitfish/ Sportfish Farmers during the winter of 2012/2013. Arkansas Aquafarming. 30(2):4-6.
  • Roy L, Hemstreet W, Brown T. 2013. Catfish disease cases in in-pond raceway systems in Alabama: 2008-2013. The Catfish Journal. 27(4):17,21.
  • Whitis GN, Roy LA, Teichert-Coddington D. 2013. US field trials show promise for mullet farming in polyculture. Global Aquaculture Advocate. 16(4):78-79.
  • Pine HJ, Roy LA, Boyd CE, Davis DA. 2012. Influencia del tipo de suelo sobre el crecimiento del camarón en aguas de baja salinidad. Aqua Cultura. 94:30-32.
  • Roy LA, Davis DA. 2012. Estrategias para mejorar la producción del camarón Litopenaeus vannamei en aguas de baja salinidad. Aqua Cultura. 91:42-44.
  • Perez-Velazquez M, Roy LA, Davis DA, González-Félix M. 2011. Mejoramiento de la producción de Litopenaeus vannamei cultivado en agua de baja salinidad en Alabama: una actualización. Panorama Acuícola Magazine. 16(3):24-27.
  • Roy LA, Davis DA, Saoud IP, Henry RP. 2009. Efectos de la variación de niveles de potasio y magnesio acusoso en la sobrevivencia, crecimiento, y respiración en el camarón, Litopenaeus vannamei, en aguas de baja salinidad. Tilapia & Camarones. 1(2):7-14.
  • Roy LA, Davis DA. 2009. Alternatives to fish meal perform well in low-salinity shrimp farm trial. Global Aquaculture Advocate. 12(3):62-64.
  • Saoud IP, Davis DA, Roy LA. 2003. Size grading experiments yield strong advice for tilapia hatcheries. Global Aquaculture Advocate. 6(6):82-83.
Alabama Fish Farming Center Website
5

FAAS Faculty

5

Directory

5

Staff

5

People Finder

Recent News