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Aim:The aim of the present study was to define the onset of puberty in Tazegzawt ram lambs, an Algerian sheep breed in endangered status with a small population in its local area.Materials and Methods:Body growth (body weight and thoracic perimeter), scrotal circumference (SC), penis development stages, and seminal parameters (volume, concentration, and motility) were measured. Data were recorded at fortnightly intervals in 10 animals from 9 to 49 weeks of age.Results:On the basis of seminal analyses, puberty occurred between 29 and 45 weeks of age. At 29 weeks of age, 30% of lambs reached puberty, and at 45 weeks of age, puberty was observed in 100% of the analyzed animals. Body weight appeared as the most determinant factor, and the onset of puberty was observed when animals reached 43.2±6.4 kg body weight with 25.8±3.7 cm of SC. Seminal analyses revealed that all parameters increased regularly from puberty onset except for sperm concentration. The mean semen volume during the study period was 0.48±0.33 mL with 0.84±0.6 mL at 37 weeks of age. Sperm concentration evolved similarly as semen volume; at 29 and 43 weeks of age, the sperm concentration was 942×106 and 1904×106 spermatozoa/mL, respectively. Kinematic parameters including the percentage of motility, the percentage of progressive motility, and gametes velocities as determined by Computer-Aided Sperm Analyzer showed the highest values at 49 weeks of age.Conclusion:The current results revealed that, in Tazegzawt ram lambs, puberty occurs between 29 and 45 weeks when animals reach 43.2±4.6 kg body weight.

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Background: Remains not fully clear the impact of intestinal chelators on microrheological violation of red blood cells during the early stages of obesity. It dictates the necessity of experimental investigations' fulfilment on laboratory animals with just developed obesity in them.Method: Ninety-four of healthy male-rats of Vistar line at the age of 2.5-3 months took into investigation. Twenty-nine animals of them had experienced no impacts and composed the control group. In 65 rats after their putting into small cages (one specimen - in a cage) during 30 days there was developed OB as the result of giving them of high-caloric diet from combined feed (47%), sweet condensed milk (44%), vegetable oil (8%) and vegetable starch (1%). Of the 35 rats received a day for 60 days of activated carbon 25 mg/kg into a stomach. There used biochemical, haematological and statistical methods of investigation.Results: At obesity development in rats, there found a steady decrease of erythrocytes-discocytes quantity in blood. It accompanied by increase of reversibly and irreversibly changed erythrocytes' quantity in examined animals' blood. At obesity development in rats there was found quick rise of erythrocytes' sum in aggregate and these aggregates' quantity at lowering of free erythrocytes' number. During experimental obesity modelling we noticed very early in rats' blood decrease of erythrocytes-discocytes' quantity, level rise of their reversibly and irreversibly varieties with strengthening of their aggregative ability. It takes place in the background of weakening of erythrocytes' antioxidant protection and activation of lipids' peroxidation in them.Conclusion: Application of activated carbons capable of rats with experimental obesity resolve arisen they breach microrheological properties of erythrocytes. It is clear that in obesity treatment regimens must be intestinal chelators, capable of positively affect many broken with this pathology haematological indices.