Dietary lysine requirements of Colossoma macropomum (Cuvier, 1818) based on growth performance, hepatic and intestinal morphohistology and hematology.

Autor: da Silva Liebl AR; Postgraduate Program in Animal Science and Fisheries Resources, Faculty of Agricultural Sciences - FAS, Federal University of Amazonas, Av. General Rodrigo Otávio Jordão Ramos, 6200, Manaus, Amazonas, 69067-005, Brazil., Cáo MA; Postgraduate Program in Infectious Diseases, Federal University of Espírito Santo, Campus Goiabeiras, Vitória, ES, Brazil., Dos Santos Nascimento M; Postgraduate Program in Aquaculture, Nilton Lins University, Av. Nilton Lins, 3259, Manaus, Amazonas, 69058-030, Brazil., Castro PDDS; Animal Physiology Laboratory, Institute of Biological Sciences, Federal University of Amazonas, Av. Gal Rodrigo Otávio Jordão Ramos, 6200, Manaus, Amazonas, 69067-005, Brazil., Duncan WLP; Functional Morphology Laboratory, Institute of Biological Sciences, Federal University of Amazonas, Av. Gal Rodrigo Otávio Jordão Ramos, 6200, Manaus, Amazonas, 69067-005, Brazil., Pantoja-Lima J; Federal Institute of Eduction, Science and Technology of Amazonas, Campus Presidente Figueiredo, Av. Onça Pintada, 1308, Presidente Figueiredo, Amazonas, 69735-000, Brazil., Aride PHR; Federal Institute of Education, Science and Technology of Amazonas, Av. 7 de setembro, 1975, Manaus, Amazonas, 69020-120, Brazil., Bussons MRFM; Institute of Technology and Education Galileo da Amazônia, Av. Joaquim Nabuco, 1950, Manaus, Amazonas, 69020-030, Brazil., Furuya WM; Department of Zootechnics - Block Z, Room 101, State University of Ponta Grossa, Avenida General Carlos Cavalcanti, 4748 - Uvaranas, 84030-900, Ponta Grossa, Paraná, Brazil., Faggio C; Department of Chemical, Biological, Pharmaceutical and Environmental Sciences University of Messina, 98166, S.Agata-Messina, Italy., de Oliveira AT; Functional Morphology Laboratory, Institute of Biological Sciences, Federal University of Amazonas, Av. Gal Rodrigo Otávio Jordão Ramos, 6200, Manaus, Amazonas, 69067-005, Brazil. adriano.oliveira@ifam.edu.br.
Jazyk: angličtina
Zdroj: Veterinary research communications [Vet Res Commun] 2022 Feb; Vol. 46 (1), pp. 9-25. Date of Electronic Publication: 2022 Jan 14.
DOI: 10.1007/s11259-021-09872-6
Abstrakt: This study aimed to determine the dietary lysine requirements of juvenile Colossoma macropomum tambaqui based growth performance, hepatic and intestinal morphohistology and hematology. Tambaqui were fed with levels of 6.60, 9.72, 12.84, 15.96, 19.08, and 22.20 g/kg of total lysine and those who received 15.96 g/kg dietary lysine showed higher final weight (p= 0.001) and optimized feed conversion ratio (p= 0.001). Morphohistological modifications (presence of fat droplets) were present in livers of fish fed with low levels of lysine. In the morphohistology of the intestine, the diets influenced the density of the intestinal, cell layers, height and perimeters of the villi and acid mucin secretion by the goblet cells. In the proximal intestine, mucosa layer density was greater at the level of 15.96 g/kg (p= 0.001). In the middle intestine, height (p= 0.001) and perimeter (p= 0.001) of the villi were greater at low levels of lysine (respectively, 9.72 and 12.84 g/kg dietary lysine). No differences were found for the hemoglobin, hematocrit, erythrocytes, MCV, MCH, MCHC, thrombocytes and leukocytes differentiated of fish fed with experimental diets (p>0.05). The biochemical responses were affected by the diet, both in plasma concentration (protein and cholesterol; p<0.05), and in muscle (ash and moisture; p<0.05). In conclusion, the dietary requirement for lysine for tambaqui juveniles was estimated to be 15.4 - 15.6 g/kg of diet (5.7% -5.8% dietary protein).
(© 2022. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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