38 JUNE 2025 • WORLD AQUACULTURE • WWW.WAS.ORG P. clarkii in terms of edible meat yield (Figure 8). With wheat, maidencane and mixed vegetation as forage, increased stocking density did not seem to increase yields. However, with early or late rice, it did. More natural food seemed to be available with rice, and higher stocking densities in this study did not appreciably reduce average size at harvest with rice as a forage. This suggests higher densities and yields could be possible when using rice as a forage, while still producing a marketable product. Nonetheless, higher stocking densities in forage-based culture systems may lead to stunting unless density reduction through selective harvests can be implemented early enough in the production cycle. The addition of formulated and supplemental feeds might improve overall physiological health of F. lancifer under culture conditions as previously shown in other species of the Cambaridae family (Robinson et al. 2017; Romaire and Villagran 2010; Dong et al. 2022), but size at harvest and profits might still be limited. Conclusion This work generates baseline data and recommendations to allow researchers and producers the opportunity to further evaluate the feasibility of summer and fall production of F. lancifer and its acceptability in traditional and non-traditional markets. Historically, life cycles of P. clarkii and P. zonangulus do not allow more northerly producers, even in Louisiana, to take advantage of an extended growing season. Summer and fall production of shrimp crawfish would potentially allow expansion of the industry into more northerly areas within the natural range of F. lancifer. Notes Miriam Contin Ortega, Southern University Agricultural Research and Extension Center, Baton Rouge, LA, USA; Joseph Bischoff, Roy O. Martin Company, Alexandria, LA, USA.; C. Greg Lutz*, Louisiana State University Agricultural Center, Baton Rouge, LA, USA. * Corresponding author: glutz@agcenter.lsu.edu References AftabUddin S., M.A.M. Siddique, A. Sein, P.K. Dey, M. RashedUn-Nabi, and M.A. Haque. 2020. First use of biofloc technology for Penaeus monodon culture in Bangladesh: Effects of stocking density on growth performance of shrimp, water quality and bacterial growth. Aquaculture. Rep. 18, 100518. Araneda M., E.P. Pérez, and E. Gasca-Leyva. 2008. White shrimp Penaeus vannamei culture in freshwater at three densities: Condition state based on length and weight. Aquaculture 283 (1-4), 13–18. Black, J.B. 1972. Life history notes on the crawfish Orconectes lancifer. Proceedings of the Louisiana Academy of Science 35:7-9. Brown, P.B., K.A. Wilson, J.E. Wetzell II, and B. 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McAllister, and R. Tumlison. 2017. Distribution, habitat, and life history aspects of the Shrimp Crayfish, Faxonius lancifer (Hagen) (Decapoda: Cambaridae) in Arkansas. Journal of the Arkansas Academy of Science: Vol. 71, Article 11. Romaire, R.P. and E.R. Villágran. 2010. Evaluation of stocking density and feeding regime on production of Red Swamp Crawfish in outdoor mesocosms. Journal of the World Aquaculture Society, 41: 298-307. Shirley, M., and C.G. Lutz. 2009. Crawfish trap design and construction. U.S.D.A. Southern Regional Aquaculture Center Fact Sheet Publication No. 2404. Stoneville, USA. FIGURE 8. One potential economic advantage of F. lancifer culture is its higher percentage of edible tail meat.
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