Degree Type

Dissertation

Date of Award

2008

Degree Name

Doctor of Philosophy

Department

Agricultural and Biosystems Engineering

First Advisor

Hongwei Xin

Second Advisor

Dianne Cook

Third Advisor

Jay Harmon

Abstract

Husbandry practices for egg production vary throughout the world. Current production systems are typically classified as caged, cage-free, or free range in terms of housing style. The research presented supplements the existing knowledge base for laying-hen housing. Where possible, a systematic assessment approach was used in the comprehensive literature review, and combined field monitoring and controlled-environment laboratory studies. The results of this research demonstrate: differing environmental conditions and hen health under different housing schemes with varying weather; no difference in heat and moisture production for varying stocking density and group size; no clear advantage of offering additional space for coping with heat challenge; and the design and initial application of a preference chamber for assessing environmental preferences of laying hens.

DOI

https://doi.org/10.31274/rtd-180813-17061

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Angela Renee Green

Language

en

Proquest ID

AAI3296796

OCLC Number

231332371

ISBN

9780549423379

File Format

application/pdf

File Size

213 pages

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