3Lewis P D,Perry G C,Morris T R.Effect of timing and size of photoperiod change on plasma FSH concentration and the correlation between FSH and age at first egg in pullets[J].British Poultry Scince,1999,40:380-384
4Scanes C G,Van Middelkoop J H,Sharp P J,et al.Strain differences in the blood concentration of luteinizing hormone,prolactin and growth hormone in female chickens[J].Poultry Scince,1980,59:159-163
5Wilson S C.Relationship between plasma concentration of luteinizing hormone and intensity of lay in the domestic hen[J].British Poultry Scince,1978,19:643-650
6Hendler R W,Dalton A J,Glenner G G.A cytological study of the albumin-secreting cells of the hen oviduct[J].J Biophysic and Biochem Cyto,1965,3(3):325-330
7Hodges R D.The histology of the Fowl[M].London,New York:Acadamic Press,1972:356-469
8Draper H S,Wyburn G M.The fine structure of the oviduct of the laying hen[J].Physiological Society,1968(2-3):7
9Kripke M L.Immunological unresponsiveness induced by ultraviolet radiation[J].Immunol Rev Sci,1984,70:2375-2378
10Ferguson T A,Hayashi J D,Kaplan H J.Regulation of the systemic immune response by visible light and the eye[J].FASEB J,1988,2:3017-3021