FUNDAMENTAL STUDIES Comparative effect of advanced soy products or corn protein concentrate with porcine meal on growth, body composition, and distal intestine histology of Florida pompano, Trachinotus carolinus Romi Novriadi 1,2 | Elizabeth Spangler 3 | D. Allen Davis 1 1 School of Fisheries, Aquaculture and Aquatic Sciences, Auburn University, Auburn, Alabama 2 Batam Mariculture Development Center, Directorate General of Aquaculture, Ministry of Marine Affairs and Fisheries, Batam, Republic of Indonesia 3 Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama Correspondence Romi Novriadi, School of Fisheries, Aquaculture and Aquatic Sciences, 203 Swingle Hall, Auburn University, AL 36849-5419. Email: rzn0027@tigermail.auburn.edu Funding information Fulbright Scholar Program , Grant/Award Number: 15150910; Hatch Funding Program of Alabama Agriculture Experiment Station The present study was designed to investigate the effects of diets containing advanced soy products (enzyme-treated soy and fermen- ted soy) or corn protein concentrate (CPC) in combination with por- cine meal (PM) to completely replace poultry byproduct meal (PBM) on growth performance, body composition, and distal intestine his- tology of Florida pompano, Trachinotus carolinus. Four experimental diets were formulated to be isonitrogenous and isolipidic, to contain 400 g/kg crude protein and 80 g/kg lipid. A reference diet (PBM diet [PBMD]) contained 150 g/kg PBM and 495 g/kg soybean meal (SBM), and three test diets were formulated replacing PBM with 15 g/kg of CPC (CPC diet [CPCD]) or replacing all SBM and PBM with 535 g/kg fermented soy (fermented soybean meal diet [FSBMD]) or 451.3 g/kg enzyme-treated soy (enzyme-treated soy- bean meal diet [ESBMD]). All three test diets were supplemented with 38 g/kg of PM. Diets were fed based on a percentage of body- weight adjusted after sampling the fish every 2 weeks to triplicate groups of Florida pompano juveniles (mean weight 8.06  0.22 g). After 8 weeks of feeding, fish fed CPCD and ESBMD performed equally well in terms of final body weight, thermal growth coeffi- cient, and percentage weight gain in comparison to fish fed PBMD. In all cases, feeding FSBMD resulted in poor feed conversion and lower feed intake compared to other treatments. Protein retention efficiency, whole-body proximate composition, phosphorus, sulfur, potassium, magnesium, calcium, sodium, and zinc contents were not significantly influenced by the dietary treatments. The results obtained in the present histological study showed no significant dif- ferences in the thickness of serous layer, muscular layer, and submu- cosal layer of the intestine among treatments. Fish fed CPCD showed a significant widening of the lamina propria with an increase of cellular infiltration and higher presence of goblet cells compared Received: 14 February 2018 Revised: 21 May 2018 Accepted: 7 June 2018 DOI: 10.1111/jwas.12547 © Copyright by the World Aquaculture Society 2018 J World Aquacult Soc. 2018;1–15. wileyonlinelibrary.com/journal/jwas 1