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    The effect of hibernation on the morphology and histochemistry of the intestine of the greater mouse-eared bat, Myotis myotis
    (Elsevier Gmbh, Urban & Fischer Verlag, 2014) Paksuz, Emine Pinar
    Seasonal variations in morphometry and histochemistry of the intestine have been examined in the active and hibernating greater mouse-eared bat, Myotis myotis, using histological and histochemical techniques. The results of morphometric analyses indicated that hibernation affected the villus height, villus width, crypt depth and crypt width of the duodenum, jejunum and ileum. Histochemical analysis showed that goblet cells of the small and large intestine contain acidic and neutral mucosubstances. According to the results obtained with Alcian Blue (pH 5.8)/PAS staining, hyaluronic acid is dominant in the goblet cells of the small and large intestine during both the hibernation and active periods. Chondroitin sulfate and dermatan sulfate, which are sulfated GAGs, were dominant, and very little heparan sulfate, heparin and keratan sulfate were present. Moreover, sulfated glycoproteins were also detected in the goblet cells of the small intestine in the active animals. The present study demonstrates that hibernation altered the examined morphometric and histochemical parameters of the intestine. (C) 2014 Elsevier GmbH. All rights reserved.
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    HEMATOLOGY AND PLASMA BIOCHEMISTRY OF GREATER MOUSE- EARED BAT Myotis myotis (Borkhausen) (CHIROPTERA: VESPERTILIONIDAE) IN TURKEY
    (Trakya Univ Balkan Yerlesesi Enstituler Binasi, 2022) Paksuz, Emine Pinar
    In this study, normal hematologic values and some biochemical parameters were examined in wild-caught greater mouse-eared bat Myotis myotis (Borkhausen) captured from Koyunbaba Cave in the Kirklareli province, Turkey. Ten apparently healthy animals (five males and five females) were used to determine the hematology and plasma biochemistry parameters including, leucocyte (white blood cell) counts (WBC), hemoglobin (Hb), hematocrit (HCT), albumin (ALB), total protein (TP), cholesterol (CHO), glucose (GLU), triglycerides (TG), Urea (U), creatine (CREAT), alanine transaminase (ALT) and aspartate amino transferase (AST). No statistically significant differences were found between male and female animals for the analyzed parameters. Plasma total cholesterol concentration was similar with the those of other insectivorous bat species whereas extremely higher than frugivorous species. Also, triglyceride level was higher than the frugivorous bats. The high total cholesterol and triglyceride values in M. myotis reflect a protein-rich diet of insectivorous bat species. The values recorded in this study could be helpful in evaluating the physiologic and pathologic status of M. myotis in the wild for conservation and management of species.
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    Histomorphometric and histochemical characteristics of the oesophagus of the greater mouse-eared Bat, Myotis myotis (Borkhausen, 1797)
    (Wiley, 2021) Paksuz, Emine Pinar; Paksuz, Serbulent
    The aim of this study was to examine the histomorphometric and histochemical structure of oesophagus of the wild-caught greater mouse-eared bat M. myotis. For this purpose, 10 specimens of oesophagus were collected and processed. The oesophagus wall of M. myotis is composed of four layers: tunica mucosa, tunica submucosa, tunica muscularis and tunica adventitia. The mucosa is covered by a non-keratinized stratified squamous epithelium. There were no glands in the wall of the oesophagus. Tunica muscularis is composed of two muscle layers: internal circular muscular layer and an external longitudinal muscular layer Histochemical studies revealed that the oesophagus was AB/PAS and PAS positive indicating the presence of acidic and neutral mucosubstances. AB-PAS staining shows that glycoproteins were predominant in the all examined layers of the oesophagus. Because of the absence of oesophageal glands in M. myotis, positive reaction with AB-PAS staining may be due to secretion of salivary glands. Absence of oesophageal glands reflects the functional adaptation as high food passage rate for the insectivorous feeding habits of animals.
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    Renal adaptation in relation to insectivorous feeding habit in the greater mouse-eared bat, Myotis myotis (Chiroptera: Vespertilionidae)
    (Wiley, 2023) Paksuz, Emine Pinar
    We examined the histological structure of the kidneys of Myotis myotis to better understand their structural adaptations to dietary habits. M. myotis is an insectivorous bat species that belongs to the family Vespertilionidae. The kidneys of M. myotis are unilobular, bean-shaped, and surrounded by a renal capsule. The two parts are distinguished by a thin cortex and a thicker medulla. Renal corpuscles consist of the glomerulus and Bowman's capsule. The proximal tubule consists of cubic cells with a well-developed brush border, whereas the distal tubule is lined with a simple cubic epithelium without a brush border. The Henle's loop, located in the medullary region, was composed of flat cells. The microvilli of proximal tubule epithelial cells and basal lamina of proximal and distal tubule epithelial cells were periodic acid Schiff (PAS)-positive. The PAS-positive reaction of the microvilli of proximal tubular epithelial cells and basal lamina of proximal and distal tubule epithelial cells is due to the presence of glycogen, which may be used as an energy substrate during absorption. The presence of acidic glycoconjugates in the papilla was demonstrated by Alcian blue (pH 2.5)-PAS staining. According to the result of silver impregnation staining, it was determined that reticular fibers form a dense fibrillary network in the kidney parenchymal tissue. Reticular fibers are responsible for demarcating and supporting the borders of cells by forming a thin network of fibrils beneath the basal lamina of the cells. Structural features in the kidney, such as a thin cortex and thicker medulla, long conical papilla, and division of the thick medulla into inner and outer regions, of M. myotis may be an adaptation to produce concentrated urine, thereby reducing water loss associated with insectivorous feeding habits.