Plasma protein concentrations of the young and adult Amazona brasiliensis parrots

Introduction. The Red-tailed Amazon parrot (Amazona brasiliensis) is an endangered species of the Psittacine family, and for which various data are important for a comprehensive preservation plan. Data about plasma protein gel electrophoresis of Amazon parrot blood are scarce. The purpose of this study was to determine plasma protein concentrations and concentrations of major protein bands in blood of young and adult Red-tailed Amazon parrot (Amazona brasiliensis). Materials and Methods. Blood samples from eight young and eight adult healthy free-living parrots were obtained. Plasma protein concentration and fractions were determined using sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE). Mann-Whitney U test was used to compare variables. Results and Conclusions. Six major protein bands with the following molecular weights were identified by SDS-PAGE: 170 kDa, 117 kDa, 85 kDa (putative ovotransferrin), 60 kDa, 45 kDa and 23 kDa. Adult parrots had significantly higher concentrations of total proteins, albumin and other proteins with similar mobility (around 60 kDa). Young birds had significantly higher levels of 23kDa proteins. The concentration of putative ovotransferrin (85 kDa) was not different between young and adult parrots. Plasma protein gel electrophoresis patterns in Red-tailed Amazon parrots are similar between young and adult animals, but specific protein bands differ in their absolute concentrations. This finding should be taken into consideration when clinical pathology data are analysed