تأثير بعض التغيرات الفصلية في التوازن المائي للجسم وعلاقتها بالتغيرات الوظيفية والنسجية لذكور الارانب النيوزلندية

EFFECT OF SOME SEASONAL CHANGES IN WATER EQUILIBRIUM IN BODY AND RELATIONSHIP OF HISTOLOGICAL AND PHYSIOLOGICAL IN MALE NEWZEALAND RABBIT

This study was carried out in department of Biology in College of Education for Pure Sciences of Karbala university and in the department of chemistry and Hematological laboratory in AL- Hussein hospital in Karbala Governorate during the period from 5/1/2011 to 15/8/2012.

Twenty adult male of Newzealand rabbits (10-12)   months and weight range of (2.85 -3.01) kg. .The rabbit were divided into two equal group, 10 rabbit for winter sample and 10 rabbit for summer sample . The temperature and humidity (12c°, 70%) in winter season  was measured by system measuring thermometer and hydrometer month in January and February, while in summer temperature and humidity (50c°, 10%) were measured in April and June. The present study was including an evaluation the water balance condition for assessment of several physiological and histological changes. Statistically analyses has include blood parameter involve red blood cell (RBC) count, White Blood cell (WBC) count, platelet count, Hemoglobin level, packed cell volume (PCV), and clinical chemistry parameter include measuring of total protein, urea, uric acid, sugar, creatinine, sodium, potassium, urine analyses and measuring concentration of aldosterone and study of some environment factor (temperature, humidity) and determine the histological changes in kidney, Adrenal gland, pituitary gland in winter, summer season.

• There is A significant increase blood parameter (P<0.05) in mean concentration of white blood cell and platelet in Winter season and significant decrease (P<0.05) in concentration of white blood cell and platelet in Summer season.
• There is no a significant of mean concentration of Blood parameter Hemoglobin, Red blood cell and packed cell volume (PCV) in Winter and Summer season.
• There is Asignificant increase of chemical parameter (P<0.05) of mean concentration of potassium, calcium ,Total protein and creatinine in Summer and a significant decrease (P<0.05) of mean concentration in potassium, calcium ,Total protein and creatinine in Winter.
• A significant increase (P<0.05) of mean concentration of sodium, urea and sugar in Winter and a significant decrease (P<0.05) of mean concentration sodium, urea and sugar in Summer.
• There is no A significant of mean concentration of uric acid in Summer and winter season.
• There is no A significant of mean concentration of body weight in male rabbit in winter and summer season and increase in weight and volume of pituitary gland in winter and in Summer increase volume of kidney and adrenal gland and increase area of cortex and medulla
• While urine analyses there is no A significant of mean concentration of PH in summer and winter season, A significant increase (P<0.05) in mean concentration of specific gravity in summer season and a significant decrease (P<0.05) in mean concentration of specific gravity in winter season.
• A significant increase (P<0.05) in mean concentration of aldosterone hormone in winter season and A significant decrease (P<0.05) in summer.
• Kidney’s notice congestion of Glomeruli, Hemorrhage in tubule, hydropic degeneration of tubular epithelial cells in season winter while notice congestion of Glomeruli, Hemorrhage in tubule and tubular dilation in Summer season .
• Results of examination of adrenal gland tissues showed. notice might to moderate congestion, Hemorrhage & necrosis in Zona Reticularis and odema of adrenal cortex in winter and summer season.
• Pituitary gland tissue notice congestion of blood vessels in winter season and sever congestion and necrosis in summer season.