Comparative evaluation of three commercial broiler stocks in hot versus temperate climates


Yalcin S. , SETTAR P., OZKAN S. , CAHANER A.

POULTRY SCIENCE, cilt.76, ss.921-929, 1997 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 76 Konu: 7
  • Basım Tarihi: 1997
  • Doi Numarası: 10.1093/ps/76.7.921
  • Dergi Adı: POULTRY SCIENCE
  • Sayfa Sayıları: ss.921-929

Özet

Hot climate is a major Limiting factor of broiler production in tropical and subtropical regions. The use of standard stocks in hot climates may result in large economic losses because genotypes selected in temperate climates may respond differently to the high ambient temperatures in hot regions or seasons. The summer and fall in Izmir, Turkey, provided the natural hot and temperate climates, respectively, for this study. Broiler chicks were obtained from three commercial stocks, all bred in temperate climates. Male and female chicks, 60 per pen, were housed in four pens per stock per season. Individual BW was determined at hatch, and at 4 and 7 wk of age. Feed consumption and efficiency were determined per pen. Feathering was scored at 4, 5, and 6 wk of age. Body temperature was measured twice on three birds per sex per pen, 16 h and immediately before slaughter, and feather weight was determined for each of these birds.