Lack of a relationship between concentrations of plasma Luteinising hormone, Thyroxine and Prolactin at nine weeks of age and subsequent egg production in the domestic hen
Titel:
Lack of a relationship between concentrations of plasma Luteinising hormone, Thyroxine and Prolactin at nine weeks of age and subsequent egg production in the domestic hen
Auteur:
Sharp, P. J. Van Tijen, W. F. Van Middelkoop, J. H. Klandorf, H. Lea, R. W. Chadwick, A.
Verschenen in:
British poultry science
Paginering:
Jaargang 22 (1981) nr. 1 pagina's 53-58
Jaar:
1981
Inhoud:
1. The concentrations of plasma luteinising hormone (LH), thyroxine and prolactin were measured in about 200 birds from each of two homogenous strains of White Leghorn hens at 9 weeks of age and related to subsequent egg production. 2. Within each strain, no relationships were found in individual birds between the concentrations of the plasma hormones and subsequent egg production after 90, 180 and 270 d of laying. 3. Single measurements of plasma LH, thyroxine or prolactin before the onset of lay do not appear to be useful criteria for the selection of egg-laying strains.