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

January 2017 – present Extension Aquaculture Specialist, Auburn University
June 2013 – January 2017 Extension Aquaculture Specialist, University of Arkansas, Pine Bluff
August 2006 – May 2013 Research Fellow, Auburn University

Honors and awards

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,
College of Agriculture, 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

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.

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 an Extension Aquaculture Specialist 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.

 

Extension Publications & Popular Articles:

  • 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. Northwest Regional 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.
  • 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.

Research Publications

  • 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, in press.
  • 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.y. 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 (Hemocytic enteritis in Litopenaeus vannamei (Crustacea, Decapoda) raised in low salinity water in Tamaulipas, Mexico). Hidrobiológica. 25(1):139-145.
  • Antony J, Harikrishna V, Saharan N, Reddy AK, 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.