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The Effects of Tryptophan and Probiotic Treatment on Behavior and Production Parameters of Laying Hens

dc.contributor.advisorDennis, Rachel Len_US
dc.contributor.authorBonilla Carrero, Paola Ivetteen_US
dc.date.accessioned2021-09-16T05:31:07Z
dc.date.available2021-09-16T05:31:07Z
dc.date.issued2021en_US
dc.identifierhttps://doi.org/10.13016/vztq-vrkj
dc.identifier.urihttp://hdl.handle.net/1903/27702
dc.description.abstractDietary supplementation can impact behavior expression through microorganism’s activity in the gut microbiome and influence productivity in animal husbandry. Adding supplements to production animals’ diet can impact behaviors and productivity via gut-brain axis activity. We investigated the effects of either probiotic or antibiotic supplementation in addition to the effects of additional tryptophan (Trp) on overall behavior and production parameters. White Leghorn chickens (n=12) were supplemented with six dietary treatments in a 2 x 3 factorial design: probiotics (1 x 109 CFU/L) or the antibiotic erythromycin (125 mg/L) in combination with either normal (0.16%) or high (0.48%) Trp in drinking water. Results indicate that probiotics with tryptophan increased locomotion (P = 0.04), social (P = 0.04), and eating behavior (P = 0.02). Antibiotics with tryptophan increased fat pad (P = 0.04) and heart weight (P = 0.04). Supplementation affected behavioral expression of normal, comfort, and pecking behavior, potentially impacted by metabolic competition at the level of the gut microbiome.en_US
dc.language.isoenen_US
dc.titleThe Effects of Tryptophan and Probiotic Treatment on Behavior and Production Parameters of Laying Hensen_US
dc.typeThesisen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentAnimal Sciencesen_US
dc.subject.pqcontrolledAnimal sciencesen_US
dc.subject.pquncontrolledAnimal behavioren_US
dc.subject.pquncontrolledAnimal welfareen_US
dc.subject.pquncontrolledpoultryen_US
dc.subject.pquncontrolledprobioticsen_US
dc.subject.pquncontrolledTryptophanen_US


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