The Importance of Daylength and Darkness Exposure on the Welfare and Productivity of Commercial Broilers
نویسنده
چکیده
........................................................................................................................................................... 45 INTRODUCTION ................................................................................................................................................... 47 MATERIALS AND METHODS ................................................................................................................................. 49 Experiments ............................................................................................................................................................ 49 Housing and management ...................................................................................................................................... 50 Data collection ........................................................................................................................................................ 51 Statistical analyses .................................................................................................................................................. 51 RESULTS ............................................................................................................................................................... 52 Lighting .................................................................................................................................................................... 52 Sex and genotype .................................................................................................................................................... 54 Interactions ............................................................................................................................................................. 54 DISCUSSION ......................................................................................................................................................... 55 ACKNOWLEDGEMENTS ........................................................................................................................................ 63 PREFACE TO CHAPTER 3: THE EFFECT OF DAYLENGTH ON CAUSE OF MORTALITY, LEG HEALTH AND OCULAR WEIGHT IN BROILERS .................................................................. 79 CHAPTER 3. THE EFFECT OF DAYLENGTH ON CAUSE OF MORTALITY, LEG HEALTH AND OCULAR WEIGHT IN BROILERS............................................................................................. 80 ABSTRACT ............................................................................................................................................................ 81........................................................................................................................................................... 8
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