The influence of different beak trimming age on performance, H-L ratio and antibody production to SRBC in laying hens

Onbaşılar E. E., Demirtas S. E., Kahraman Z., Karademir E., Demir S.

TROPICAL ANIMAL HEALTH AND PRODUCTION, cilt.41, sa.2, ss.221-227, 2009 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 41 Sayı: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1007/s11250-008-9179-5
  • Dergi Adı: TROPICAL ANIMAL HEALTH AND PRODUCTION
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.221-227
  • Anahtar Kelimeler: Beak trimming age, Performance, H-L ratio, Antibody production, PLASMA-CORTICOSTERONE, PHYSIOLOGICAL STRESS, CAGED LAYERS, CHICKENS, DENSITY, PARAMETERS, FLOOR, POPULATION, DEBEAKING, RESPONSES
  • Ankara Üniversitesi Adresli: Evet

Özet

The objectives of this study were to examine the effects of beak trimming age on performance criteria, H-L ratio, antibody production, the percentage of spleen and liver and external appearance. The chicks (Barred Rock) were randomly divided into 4 beak-trimming groups (non-trimmed (control), a trim at 1 d (1D), at 10 d (10D) and at 10 wk (10W)), each of 132 chicks. There were 6 replicate cages at beak trimming groups at rearing period. At 18 wk of age a total of 144 pullets were transferred to the layer house, and the pullets were housed at 323 and 646 cm(2)/hen with 8 and 4 birds per cage in three-deck layer cages. There were a total of 24 replications with 12 replications equally divided between the high and low density cages, and the beak trimmed treatments were randomly and equally divided within each density. As a result of this experiment differences among groups in body weight in rearing phase were disappear in the laying phase. Low feather condition was found in untrimmed hens. H-L ratio in both pullet and laying phase was higher in hens of untrimmed groups. Cage area affected all examined parameters except that body weight, mortality rate, cracked, broken and unshell egg rates, shell breaking, shape index, shell thickness, meat-blood spot rates, spleen and liver percentages, throat injures and antibody production to SRBC.