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To this purpose, two practical diets were formulated: one with 50% P and 10% CH (P50\/CH10) and other with 40% P and 20% CH (P40\/CH20). Triplicate groups of fish with<jats:inline-formula><a:math xmlns:a=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" id=\"M1\"><a:mn>9.1<\/a:mn><a:mo>\u00b1<\/a:mo><a:mn>0.01<\/a:mn><a:mtext>\u2009<\/a:mtext><a:mtext>g<\/a:mtext><\/a:math><\/jats:inline-formula>were fed these diets for 60 days until visual satiation at a FF of 1, 2, or 3 meals per day. Distal intestine histomorphology was not affected by diet composition or FF. However, the pyloric caeca (PC) of fish fed 1 meal per day presented more gut fold height alterations than the other groups, except in fish fed diet P50\/CH10 3 meals per day, where no changes was observed. Fish fed diet P40\/CH20 3 meals per day also presented higher PC submucosa cellularity than the other groups. Fish fed diet P40\/CH20 presented a higher number of operational taxonomic units, microbial richness, and diversity indices than fish fed diet P50\/CH10. Amylase was the only measured digestive enzyme affected by the experimental conditions, presenting higher activity in fish fed diet P50\/CH10 once per day. Glucose-6-phosphate dehydrogenase activity was lower in fish fed 2 meals per day than only 1. While catalase activity was lower in fish fed 2 than 3 meals per day. Glutathione reductase activity was the only measured parameter affected both by dietary P\/CH ratio and FF, being inferior in fish fed once per day the P50\/CH10 diet than the P40\/CH20 diet and, also in the P50\/CH10 diet, to fish fed 1 than those fed 3 meals per day. Overall, no major interactions was observed between dietary P\/CH ratio and FF; however, a P40\/CH20 diet fed 2 meals per day might be recommended for gilthead seabream juveniles.<\/jats:p>","DOI":"10.1155\/2022\/8435786","type":"journal-article","created":{"date-parts":[[2022,3,9]],"date-time":"2022-03-09T01:35:49Z","timestamp":1646789749000},"page":"1-11","source":"Crossref","is-referenced-by-count":2,"title":["Effects of Feeding Frequency and Dietary Protein\/Carbohydrate Ratios on Gilthead Seabream (Sparus aurata) Intestinal Functionality and Health"],"prefix":"10.1155","volume":"2022","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2206-5430","authenticated-orcid":true,"given":"Catarina","family":"Basto-Silva","sequence":"first","affiliation":[{"name":"CIIMAR \u2013 Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leix\u00f5es, Av. General Norton de Matos s\/n, 4450-208 Matosinhos, Portugal"},{"name":"FCUP \u2013 Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo, Alegre s\/n, Ed. FC4, 4169-007 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9852-2426","authenticated-orcid":true,"given":"Cl\u00e1udia R.","family":"Serra","sequence":"additional","affiliation":[{"name":"CIIMAR \u2013 Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leix\u00f5es, Av. General Norton de Matos s\/n, 4450-208 Matosinhos, Portugal"},{"name":"FCUP \u2013 Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo, Alegre s\/n, Ed. 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