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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

The present study evaluated different levels of the essential oil of Nectandra grandiflora (EONG) in the diet of juvenile Colossoma macropomum. The juveniles (0.75 ± 0.05 g) were fed four experimental diets with differing levels of EONG (0, 0.5, 0.75, and 1.50 mL/kg). After 20 days, the weight, daily weight gain, specific growth rate, and daily feed consumption per fish were highest for the fish fed 0.5 mL EONG/kg, while after 30 days, only the weight and daily feed consumption per fish for that diet remained highest. The viscerosomatic index was highest for the fish fed 0.5 mL EONG/kg while the hepatosomatic index was higher for the groups that received dietary EONG for 30 days. The juveniles fed 1.5 mL EONG/kg showed a proliferative response of the mucous cells in the gills, but the proliferation of these lysozyme- and immunoglobulin-secreting mucosal cells was higher for the skin of the fish of all EONG levels, compared to that of the control fish. The fish fed 0.5 mL EONG/kg had the greatest height and width of intestinal villi. The two highest levels of dietary EONG supplementation (0.75 and 1.50 mL/kg) reduced the hepatocyte dimensions but did not modify the centrolobular vein area. Dietary supplementation with 0.5 mL EONG/kg improved the growth, gut health, and immune response of juvenile C. macropomum.

Details

Title
Growth Performance and Histomorphology of Intestine, Skin, Gills and Liver of Juvenile Colossoma macropomum Fed Diets Containing Different Levels of the Essential Oil of Nectandra grandiflora
Author
Santos, Fabio A C 1 ; Batista, Felipe S 1 ; Souza, André S 1 ; Julio, Gustavo S C 1 ; Favero, Gisele C 1   VIAFID ORCID Logo  ; Junior, José F V 2 ; Costa, Sílvio T 2 ; Zeppenfeld, Carla C 3 ; Bianchini, Nadia H 4 ; Heinzmann, Berta M 5   VIAFID ORCID Logo  ; Baldisserotto, Bernardo 3   VIAFID ORCID Logo  ; Luz, Ronald K 1   VIAFID ORCID Logo 

 Laboratório de Aquacultura, Departamento de Zootecnia, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, MG, Brazil; [email protected] (F.A.C.S.); [email protected] (F.S.B.); [email protected] (A.S.S.); [email protected] (G.S.C.J.); [email protected] (G.C.F.) 
 Departamento de Morfologia, Universidade Federal de Santa Maria, Avenida Roraima, 1000, Santa Maria 97105-900, RS, Brazil; [email protected] (J.F.V.J.); [email protected] (S.T.C.) 
 Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Avenida Roraima, 1000, Santa Maria 97105-900, RS, Brazil; [email protected] (C.C.Z.); [email protected] (B.B.) 
 Laboratório de Extrativos Vegetais, Programa de Pós-Graduação em Engenharia Florestal, Universidade Federal de Santa Maria, Avenida Roraima, 1000, Santa Maria 97105-900, RS, Brazil; [email protected] 
 Departamento de Farmácia Industrial, Universidade Federal de Santa Maria, Avenida Roraima, 1000, Santa Maria 97105-900, RS, Brazil; [email protected] 
First page
509
Publication year
2023
Publication date
2023
Publisher
MDPI AG
e-ISSN
24103888
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2882565603
Copyright
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.