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
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Palmer J, James J, Kelly A, Roy L. 2023. Hybrids missed in seining bringing lower prices, study shows. The Catfish Journal. 37(3):11.
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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.
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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.
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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.
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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.
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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.
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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.
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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/
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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.
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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.
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Kelly A, Roy L. 2022. Ammonia in catfish ponds. Alabama Cooperative Extension Newsletter. Fish Farming News. 2022(2):4-5.
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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.
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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.
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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.
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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.
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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.