Effect of 5 hour increases in photoperiod and in feeding opportunity on age at first egg

References

• Callenbach , E.W. , Nicholas , J.E. and Murphy , R.R. 1943 . Effect of light and availability of feed on egg production . Pennsylvania Agricultural Experimental Station Bulletin , 455
   Google Scholar
• Dunn , I.C. and Sharp , P.J. 1992 . The effect of photoperiodic history on egg laying in dwarf broiler breeder hens . Poultry Science , 71 : 2090 – 2098 .
   PubMed Web of Science ®Google Scholar
• Lee , P.J.W. , Gulliver , A.L. and Morris , T.R. 1971 . A quantitative analysis of the literature concerning the restricted feeding of growing pullets . British Poultry Science , 12 : 413 – 417 .
   Web of Science ®Google Scholar
• Lewis , P.D. and Perry , G.C. 1989 . Effect of a 6 h increase in photoperiod at 17 weeks of age on food intake, growth rate, carcase composition and age at sexual maturity . British Poultry Science , 30 : 966 – 967 .
   Google Scholar
• Lewis , P.D. , Perry , G.C. and Morris , T.R. . Effect of timing and size of light increase on sexual maturity in two breeds of domestic hen . Proceedings XIX World's Poultry Congress . Amsterdam. Vol 1 , pp. 689 – 692 .
   Google Scholar
• Lewis , P.D. and Perry , G.C. 1995 . Effect of age at sexual maturity on body weight gain . British Poultry Science , 36 : 854 – 856 .
   Google Scholar
• Morris , T.R. 1967 . “ Light requirements of the fowl ” . In Environmental Control in Poultry Production , Edited by: Carter , T.C. 15 – 39 . Edinburgh : Oliver & Boyd .
   Google Scholar