자료유형  

 학위논문

Control Number  

0016935150

International Standard Book Number  

9798380072311

Dewey Decimal Classification Number  

636

Main Entry-Personal Name  

House, Gabrielle Marie.

Publication, Distribution, etc. (Imprint  

[S.l.] : Texas A&M University., 2022

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2022

Physical Description  

1 online resource(147 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-02, Section: B.

General Note  

Advisor: Archer, Gregory S.

Dissertation Note  

Thesis (Ph.D.)--Texas A&M University, 2022.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약As duck production becomes more prevalent on a global scale, modern duck housing systems must maximize duck productivity. The welfare of an animal influences its productivity, and is therefore useful in evaluating which environmental factors, such as artificial lighting, are more favorable in duck production systems. However, limited research has examined the manipulation of photoperiod and light spectrum on Pekin duck welfare and growth. Four experiments were conducted to determine the effects of (i) two photoperiods, (ii) two commercially available LED fixtures, (iii) ultraviolet (UV) light supplementation, and (iv) four experimental monochromatic LED fixtures on Pekin duck growth, stress, and fear responses during a 35 d grow-out period. Ducks reared under a 20L:4D photoperiod had more efficient nutrient metabolism and stronger humoral immune response to Newcastle Disease Virus vaccine due to improved FCR and decreased stress and the effects of stress compared to ducks reared under 16L:8D. Ducks subjected to white/red LED lighting had lower stress susceptibility and fear responses compared to those subjected to white/blue LED lighting, indicating duck welfare may be compromised by blue LED light exposure, even at supplemental levels. Ducks exposed to supplemental UV light had narrower and lighter eyes and lower acute and chronic stress susceptibility compared to ducks not subjected to UV light (control). UV ducks also had a faster latency to first head movement during tonic immobility (TI) and required more attempts to induce TI than in the control ducks. These results indicate supplemental UV lighting can lower stress and fear responses in Pekin ducks and increase duck welfare. Exposing ducks to monochromatic red and blue LED lighting elevated the stress response of ducks and decreased eye weight compared to white and monochromatic green LED light. This indicates blue and red lighting may not be adequate for Pekin duck grow-out, and Pekin ducks may require artificial light sources containing a broad range of wavelengths, as seen with white and green lights. The current findings indicate Pekin duck welfare and performance can be influenced by artificial lighting duration and spectrum and emphasize the importance of choosing correct artificial lighting for Pekin ducks.

Subject Added Entry-Topical Term  

Animal sciences.

Subject Added Entry-Topical Term  

Physiology.

Subject Added Entry-Topical Term  

Behavioral sciences.

Index Term-Uncontrolled  

Duck

Index Term-Uncontrolled  

Lighting

Index Term-Uncontrolled  

Welfare

Index Term-Uncontrolled  

Stress

Index Term-Uncontrolled  

Behavior

Added Entry-Corporate Name  

Texas A&M University Poultry Science

Host Item Entry  

Dissertations Abstracts International. 85-02B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:641098