Comparative age – related weight and morphometrical investigation of the intraorbital glands in the common bronze turkey (Meleagris Meleagris Gallopavo)

D. Dimitrov*

Abstract. All birds have two fundamental intraorbital glands – The third eyelid or Harderian gland and the classical lachrymal gland. In this study the biological material was obtained from 60 clinically healthy common bronze turkey poults and turkeys (Meleagris Meleagris Gallopavo) purchased from the pheasant farm, Trankovo, Stara Zagora region. The birds were at the age of 1, 7, 14, 28, 35, 49, 56, 90, 120 and 240 days. Each of the 10 age groups consisted of 6 birds (3 male and 3 female). The selected age groups included the period from the hatching of the birds, to the sexual maturity and economical realization (240 days of age). The donor individual live body weight were determined before removal of glands, and each of the 240 intraorbital glands (120 Harderian glands and 120 lachrymal glands) was weighted on automated balance. The detected weight and morphometrical gland,s parameters were processed by statistical software (StatMost for Windows) and presented in a table and figures.