Open AccessDifferent levels of organic trace minerals in diets for Nile tilapia juveniles alter gut characteristics and body composition, but not growth
Author(s) -
Pierri Bruno da Silva,
Silva Allan David,
Cadorin Douglas Ismael,
Ferreira Tamiris Henrique,
Mouriño José Luiz Pedreira,
Filer Keith,
Pettigrew James E.,
Fracalossi Débora Machado
Publication year - 2021
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.13175
Subject(s) - nile tilapia , biology , composition (language) , trace minerals , food science , body weight , fish <actinopterygii> , zoology , oreochromis , fishery , endocrinology , linguistics , philosophy
Abstract Thirty groups of twenty juveniles each of Nile tilapia ( Oreochromis niloticus , initial average weight 23.93 ± 0.80 g) were fed diets containing increasing amounts (0%, 25%, 50%, 75%, and 100% of levels used by the tilapia feed industry) of organic trace mineral (Fe, Zn, Mn, Cu, Se) supplementation for 56 days. Growth was not affected by the dose of mineral supplementation. However, body protein increased in fish fed intermediate doses of organic minerals, reaching a maximum at 40.44% supplementation. Doses >50% showed mild damage to the intestinal tissue. Body Fe, Zn and Cu deposition were highest at 28.32%, 24.43% and 78.45% supplementation, respectively. Tilapia could modulate intestinal morphology when fed different doses of organic minerals. As the supplementation doses increased, hemosiderin staining increased in the distal intestine and total body Fe content, indicating that the distal region of the intestine plays an important role in iron excretion by tilapia. Supplementation of organic trace minerals at intermediate doses does not harm Nile tilapia growth, but excessive trace mineral supplementation can impair body protein retention and promote histological alterations in the gut.