title: Supplemental dietary L-tryptophan effects on growth, meat quality, and brain catecholamine and indoleamine concentrations in turkeys.
abstract: 1. An experiment was conducted to investigate the effects of feeding supplemental tryptophan during the two weeks before market on growth, mortality during transportation, meal quality and brain neurotransmitter concentrations in male turkeys. 2. Brain serotonin, 5-hydroxyindoleacetic acid and norepinephrine concentrations were increased dose-dependently with 1.0, 2.0 and 3.0 g/kg supplemental dietary tryptophan. 3. Supplemental dietary tryptophan had no effect on body weight gain, food intake, food efficiency or mortality. 4. Carcase and individual thigh weights were significantly heavier in those birds fed 1.0 g/kg supplemental tryptophan.
authors.affiliation: Department of Poultry Science, Virginia Polytechnic Institute and State University, Blacksburg 24061-0332.
authors.forename: D M
authors.initials: DM
authors.lastname: Denbow
authors.forename: F C
authors.initials: FC
authors.lastname: Hobbs
authors.forename: R M
authors.initials: RM
authors.lastname: Hulet
authors.forename: P P
authors.initials: PP
authors.lastname: Graham
authors.forename: L M
authors.initials: LM
authors.lastname: Potter
mesh_terms: D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D001921:Brain / Q000378:metabolism*; D002395:Catecholamines / Q000378:metabolism*; D004435:Eating; D006897:Hydroxyindoleacetic Acid / Q000378:metabolism*; D008297:Male; D008460:Meat; D014186:Transportation; D014364:Tryptophan / Q000008:administration & dosage / Q000494:pharmacology*; D014422:Turkeys / Q000254:growth & development / Q000378:metabolism*
chemical_list: D002395:Catecholamines; D006897:Hydroxyindoleacetic Acid; D014364:Tryptophan