MORPHOLOGICAL FEATURES OF THE KIDNEYS OF DAY-OLD TURKEY CHICKS OF HYBRID CONVERTER AND HYBRID CONVERTER NOVO CROSSES

Kidneys of poultry, in particular turkeys, are poorly studied in terms of morphology and histology depending on age and cross. The aim of the study is to investigate the anatomical and histological features of the kidney structure in day-old turkey chicks of the Hybrid Converter and Hybrid Converter novo cros¬ses. The studies were conducted at the Department of Anatomy and Physiology of the Northern Trans-Urals State Agrarian University. The objects of the study were kidneys of 1-day-old turkeys of the Hybrid Converter (n = 5) and Hybrid Converter novo (n = 5) crosses. To accomplish the tasks, a set of anatomical and morphometric research methods was used. Fixation of the obtained material and histological studies were carried out according to generally accepted methods. Microscopic studies were carried out using a Micros microscope, and the HAYEAR program was used to measure the main parameters of the kidney structures. As a result, it was found that the relative weight of the Hybrid Converter cross is 0.13 % higher than that of the Hybrid Converter novo, while the weight of the left kidney in chickens of both crosses is greater than the absolute weight of the right kidney. The length and width of the left lobes of the kidney are greater in Hybrid Converter chickens, and in the right lobes, the length of the cranial and medial lobes, as well as the width of the cranial, medial and caudal lobes are greater in Hybrid Converter novo chickens. All types of glomeruli in day-old Hybrid Converter chickens are smaller than in Hybrid Converter novo chickens: superficial renal corpuscles – by 25.1 %, intracortical renal corpuscles – by 6.48, juxtamedullary renal corpuscles – by 3.37 %.