Browsing by Author "BALASUNDARAM, K."
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ThesisItem Restricted DEVELOPMENTAL SEQUENCE OF ENDOCRINE GLANDS IN SHEEP (Ovis aries)(TANUVAS, CHENNAI, 2021) SATYA SAI CHANDANA GADULA; TANUVAS; BALASUNDARAM, K.; EZAKIAL NAPOLEAN R.; SELVARAJ P.; SRINIVASAN P.Studying the developmental anatomy of endocrine glands helps to understand the timing of embryological events to maintain normal homeostasis of body and to analyse birth defects. Sheep acts as an excellent model for the study of endocrine system. Samples of pituitary, pineal, thyroid, parathyroid, pancreas, adrenal, testes and ovary were collected from pre and postnatal groups of sheep. Pituitary gland in sheep was an oval shaped, pale pink coloured dorsoventrally flattened gland lodged in the sella turcica of post sphenoid bone. In group I, Rathke’s pouch formation was seen at 25 days of gestation. In group II, at 55 days of gestation, in pars distalis cells were differentiated into chromophils and chromophobes, at 85 days of gestation chromophils were differentiated into acidophils and basophils. In group III, the number of cells and capillaries were increased. In group IV, acidophils were grouped as clumps and basophils were found distributed between these clumps. In group V, delta basophils were more and in group VI, beta basophil were numerous. In pars intermedia basophilic cells and in pars nervosa pituicytes and nerve fibres were noticed.Chromophilic cells showed moderate PAS, Millon’s, alkaline phosphatase, weak acid phosphatase and strong alpha naphthyl acetate esterase reactions.ThesisItem Restricted PHYSIOLOGICAL STUDY ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE IN KANGAYAM CATTLE(TANUVAS, CHENNAI, 2021) DEVIPRIYA K.; TANUVAS; SELVARAJ P.; JAYACHANDRAN, S.; BALASUNDARAM, K.; SIVAKUMAR, K.; MANOKARAN, S.The present study was conducted in Kangayam breed of cattle at different age group to assess growth rate, physiological and haematobiochemical parameters, reproductive hormones concentration, milk composition and thermotolerance ability. 66 animals of different age were selected and divided into 6 groups of 10 animals each. Growth rate of calves from 1 to 12 months of age was estimated using Schaeffer’s formula and compared with actual weight. There was about 2-4% less body weight obtained when formula was used. Among physiological parameters, respiratory rate in early months was significantly higher (P<0.05) in both males and females and later it was reduced as the age increased. However no changes were observed in pulse rate, rectal temperature and skin temperature between different age groups.