Browsing by Author "Venkatesan, S."
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ThesisItem Open Access Anatomy of the Eyeball in the Domestic Fowl (Gallus domesticus)(Tamil Nadu Veterinary and Animal Sciences University, 2001) Venkatesan, S.; TANUVAS; Ramesh, GeethaThesisItem Open Access Awareness, knowledge and adoption level of recommended tomato cultivation practices(Tamil Nadu Agricultural University, Coimbatore, 2000-12-31) Venkatesan, S.; Ravi, K.C.Abstract availableArticleItem Open Access A Comparative Anatomical Study Of the Femur Of Domestic Fowl, Guinea Fowl, Turkey and Ostrich(2006-11) Venkatesan, S.; Paramasivan, S.; Kannan, T.A.; Basha, Sabiha H.; Ramesh, Geetha; TANUVASThe available literature on the gross morphology of the avian femur is mostly limited to the domestic fowl. Therefore, the present study was taken with the aim of comparing the gross morphological features of the femur in the other emerging commercially popular avian species, viz. guinea fowl, turkey and ostrich along with the domestic fowl.ThesisItem Open Access Histology and Histochemistry of the Adrenal Gland in Guinea Fowl(TANUVAS, 2008) Prabhavathi, M.; TANUVAS; Basha, Sabiha Hayath; Venkatesan, S.; Leela, V.ArticleItem Open Access Histology and Histochemistry of the Preen Gland in Guinea Fowl (Numida mealagris)(Indian Veterinary Journal, 2011-08) Ushakumary, S.; Venkatesan, S.; Basha, Sabiha Hayath; Selvan, S. Senthamil; Ramesh, Geetha; TANUVASUropygial or preen gland of bird is homologus to the mammalian sebaceous gland and is said to protect the feathers by its secretion. This prominent integumentary gland is located at the base of tail and acts as a source of Vitamin D.ArticleItem Open Access Histology of the Magnacellular Supraoptic Nucleus of Hypothalamus in Madras Red Sheep (Ovis aries)(Indian Veterinary Journal, 2013-04) Paramasivan, S.; Ramesh, Geetha; Ushakumary, S.; Basha, Sabiha H; Venkatesan, S.; TANUVASThe hypothalamus together with a group of highly heterogeneous structures referred to as the limbic system, are key neuronal elements involved in maintaining homeostatis (Saper, 1990). The hypothalamus is closely involved in a wide variety of behavioral, autonomic, visceral, and endocrine functions. However, the hypothalamus is the least well understood area of the hypothalamo-pituitary axis. Hence, the present study on histology and micrometry of the supraoptic nucleus in Madras Red sheep was carried out.ArticleItem Open Access Histomorphology Of the Pineal Gland In Sheep(2010-07) Prabhavathi, M.; Basha, Sabiha H.; Paramasivan, S.; Venkatesan, S.; Ramesh, Geetha; TANUVASPineal gland acts as a neuroendocrine gland which secretes melatonin and other enzymes that helps to regulate the animal's circadian rhythm. The gland plays a major role in sexual development, hibernation, metabolism and seasonal breeding in animals (Trautmann and Josef Fiebtger 2002)ArticleItem Open Access Histophysiological Studies on the Hypophysiomammary Axis in Sheep (Ovis aries) - Mammotrophs(2016-06) Paramasivan, S.; Ramesh, Geetha; Ushakumary, S.; Venkatesan, S.; Kulasekar, K.; Balachandran, C.; TANUVASThe pituitary gland and mammary glands of 30 Madras red ewes of different age groups were utilized for the current study. Two types of acidophils were identified in the pars distalis adenohypophysis. The size of type II acidophils (carminophils) ranged from 9.15 ± 0.26 μm in prepubertal age to 10.05 ± 0.29 μm in lactating sheep. The average number of type II acidophils in prepubertal sheep was 550 ± 34.88 cells/mm2 which increased gradually upto lactation (2043 ± 107.48 cells/mm2) but showed marked decrease in dry animals (1269 ± 117.71 cells/mm2). These cells had the largest electron dense, oval or elliptical shaped secretory granules varied in size from 200 to 700 nm. in pregnant and lactating sheep. Immature forms of granules were smaller, and more variable in size and shape.ThesisItem Open Access Microanatomical Studies on the Spleen of the Japanese Quail (Coturnix coturnix japonica)(TANUVAS, 1996) Venkatesan, S.; TANUVAS; Vijayaraghavan, C.; Venkatakrishnan, A.; Cyrus, InbarajArticleItem Open Access Morphogenesis and Histomorphology of the Sclera In Layer and Broiler Chicken(TANUVAS, Chennai, 2012-05) Venkatesan, S.; Basha, Sabiha Hayath; Ramesh, Geetha; TANUVASA study on the morphogenesis and histomorphology of the sclera was carried out in the layer and broiler chicken. Tissue material was collected from 60 embryonated eggs at different days of incubation and 168 white leg horn birds at different age groups.The primordium of the sclera was found as concentrated mesenchymal layer around the optic cup on the fourth day of incubation. The development succeeded till fourteenth day and after that it resembled the post-hatch birds. The sclera was thicker which varied in different regions of the eyeball in post hatch birds. The thickness increased rapidly till 20th week and slowed down after 20 weeks in layers while it increased constantly till 8th week in broilers. Histologically, no significant structural changes between the sexes and the right and left side of the eyeball in the corresponding age groups was noticed.ArticleItem Open Access Morphometrical Analysis of the Wing of the Blue-And-Yellow Macaw (Ara ararauna) With Reference to the Aerodynamics(Int. J. Curr. Microbiology and Applied Sciences, 2017) Bhargavi, S.; Venkatesan, S.; Ramesh, Geetha; Kannan, T.A.; TANUVASKnowledge about the morphological adaptations of body and wing in birds helps to know about their aerodynamic performance. The present study was aimed to analyze the morphometry of the wing of the blue and yellow macaw (Ara ararauna) with reference to aerodynamics. Various aerodynamic measurements namely body weight, body length, wing span, wing area, wing load and aspect ratio were measured in three adult male birds. The wings were short, elliptical and rounded. The mean value of body weight, body length, wing length, wing span, wing area, wing load and aspect ratio of the blue and yellow macaw were 1080 ± 95.34 g, 174.46 ± 4.87 cm, 34.67 ± 4.87 cm, 77.4 ± 3.67 cm, 1294 ± 54.32 cm2, 0.834 ± 0.01cm-2 and 4.626 ± 0.57 respectively. The low aspect ratio suggested ability to maneuver tightly in confined spaces like dense vegetation. All anatomical and aerodynamical measurements concluded that blue-and yellow macaw was adapted to flapping flightOtherItem Open Access Presence of Tassels in a Buffaloe Calf - A Case Report(TANUVAS, 2006-06) Venkatesan, S.; Kannan, D.; Ramesh, GeethaThesisItem Open Access Studies on the management of blackgram (Vigna mungo (L.) Hepper) yellow mosaic virus(Tamil Nadu Agricultural University, Coimbatore, 2000-12-31) Venkatesan, S.; Chandrasekaran, A.Abstract availableArticleItem Open Access கால்நடைகளில் பாம்புக்கடி(TANUVAS, 2005-02) Venkatesan, S.; TANUVAS