Factors involved in the control of plasma thyroid hormone concentrations during an induced molt in the domestic hen

Egg production in the domestic hen improves following a molt. Experiments were directed at developing a method of inducing molt and comparing it with the traditional method of temporary feed withdrawal (FW). Molting mechanisms were also studied. Molt was induced by infusion of a gonadotropin releasing hormone agonist (GnRH-A; (D-Leu$\sp6$,Pro$\sp9$) -GnRH N-ethylamide), and compared with molt induced by FW. Hens were divided into three groups: (1) sham infused (controls); (2) molted by GnRH-A infusion (GnRH-A); or (3) molted by FW. Plasma was assayed for T$\sb4$, T$\sb3$, and P$\sb4$, and egg production was recorded.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physiology

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Dickerman, Robert Winn

Contributors dc:contributor

• Bahr, James

• Biology, Animal Physiology
• Agriculture, Animal Culture and Nutrition

Statement dc:rights

• Copyright 1990 Dickerman, Robert Winn

Language dc:language

eng

Identifier

AAI9026168
(UMI)AAI9026168

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20481