Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/12138
Title: Nile tilapia (Oreochromis niloticus): enteroendocrine peptides and functional amino acids
Authors: Rosa, Priscila Vieira
Gatlin III, Delbert M.
López-Olmeda, Jose Fernando
Furuya, Wilson Massamitu
Pereira, Luciano José
Cantarelli, Vinicius de Souza
Abreu, Márvio Lobão Teixeira de
Keywords: Peptide hormones
Immunohistochemistry
Arginine
Glutamine
Protein optimization
Amino acids metabolism
Innate immune system
Fish
Nutrição
Intestinos
Hormônios peptídeos
Imunohistoquímica
Arginina
Glutamina
Otimização de proteina
Metabolismo de aminoácidos
Sistema imune inato
Peixes
Nutrition
Intestine
Issue Date: 28-Dec-2016
Publisher: Universidade Federal de Lavras
Citation: PEREIRA, R. T. Nile tilapia (Oreochromis niloticus): enteroendocrine peptides and functional amino acids. 2016. 112 p. Tese (Doutorado em Zootecnia)-Universidade Federal de Lavras, Lavras, 2016.
Abstract: The present thesis provides research findings in two different approaches. The first study analyzed by immunohistochemistry the distribution of ECs producing gastrin (GAS), cholecystokinin-8 (CCK-8), neuropeptide Y (NPY), and calcitonin gene-related peptide (CGRP) along the gut of Nile tilapia. In addition, we assessed the effects of fasting and feeding in the distribution of immunoreactive ECs. Depending on the peptide produced and anatomical location, ECs were seen more concentrated in some segments while in other intestinal portions ECs were sparse. Regarding nutrient status, we found that the anterior segments of the midgut seem to be the main site which respond to luminal changes in Nile tilapia. The second study investigated the effects of dietary supplementation of glutamine and arginine for Nile tilapia. The fish were fed the six experimental diets formulated to contain different levels of supplemental Gln and/or Arg (Control, GLN 1%, GLN 2%, ARG 1%, ARG 2% and GLN+ARG 1%) for a nine weeks period. Growth performance, innate immune responses, and amino acids profile in plasma and whole-body were examined. Dietary Gln and/or Arg supplementation resulted in significant effects on weight gain, feed intake, feed efficiency ratio, protein efficiency ratio and protein retention. Moreover, the concentration of free AA in plasma at 6 h and 18 h were significantly affected by experimental diets.
Description: Os campos "Co-orientador", "Assunto", "Resumo" e "Abstract" foram inseridos seguindo solicitação feita pela autora ao RIUFLA.
URI: http://repositorio.ufla.br/jspui/handle/1/12138
Appears in Collections:Zootecnia - Doutorado (Teses)

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