Akademik Veri Yönetim Sistemi
Revue de Medecine Veterinaire, cilt.156, ss.275-280, 2005 (SCI-Expanded)
This study was carried out to determine the changes in venous blood pH, HCO3 concentration, BE-ecf, BE-b, pCO(2), Ct-CO2, pO(2) and O(2)sat every 6 h during the laying cycle of the goose. Seven ge8e (2 year-old, weighing 4.26 kg at average) with a laying cycle of 42 h were used. Diets were formulated to cover their nutrient requirements. After 15 days of adaptation period, blood samples were collected every 6 h during the laying cycle. A first decrease of HCO3- concentrations, base excess in extracellular fluid (BE-ect) or in blood (BE-b), pCO(2) and Ct-CO2 was observed at the 6(th) h, following by a more marked reduction at the 30(th) It of the laying cycle. Highly significant correlations were obtained between HCO3 concentrations, base excess, PCO2 and ct-CO2 (p < 0.001, correlation coefficients were comprised between 0.946 and 1.000). Although blood pH values remained within normal ranges, close to the inferior limit, multiple regression analyses evidenced links between blood pH, alkaline reserve and CO2 related parameters. By contrast, pO(2) and the percentage of 02 saturation (O(2)sat) fluctuated in an opposite way with the occurrence of 3 spikes at the 6(th), 18(th) and the 30(th) h, and were highly positively correlated (p < 0.001, r = 0.942). These results indicate that buffering systems (HCO3-, base excess) and functional adaptive responses of lungs and probably kidneys are involved for blood pH regulation during the laying cycle in goose. Therefore, it is suggested that decreased blood HCO3, BE-ecf, BE-b, pCO(2) and ct-CO2 should be corrected in geese, especially at the 30th h of laying cycle for animal's health and productivity.