DETERMINATION OF HAEMATOLOGICAL AND BIOCHEMICAL PARAMETERES IN HENS AT DIFFERENT STAGES OF THE EGG FORMATION

Abstract

10 hybrid ISA Brown hens, 50 weeks old, hold single in cages and fed with combined granulated forage, were monitored for a period of 3 weeks. They were divided into 4 groups depending on the stages of the egg formation. When 53 weeks old, the the blood samples were prevailed and thereafter prepared to determine the haematological parameters and the calcemia and phosphoremia.. The values of haematological parameters (the eritrocytes sedimentation rate, the haemoglobine content, the haematocrit and the leukocitar formula) are within the normal limits and that no variations appear depending on the egg position in the oviduct. The calcemia values are within the normal limits (20-35 mg%) for hens during their laying period, The mean value is 34.19±0.96 mg %. The statistical processing of the data does not reveal significant differences (p>0.05) among the calcemia values, irrespective of the egg formation stage. The phosphoremia values show significant modifications during the 24-25 hours necessary for the egg formation: at 30 minutes postoviposition the mean value of the phosphoremia represented 4.86±0.14 mg%, and at 22-23 hours postoviposition the level of the blood phosphorous represented 4.64±0.10 mg%, while at 10-12 hours postoviposition the registered mean value was 6.79±0.07 mg% phosphrous.

Keywords

• laying fowl
• haematological parameters
• calcemia
• phosphoremia