[Follicle characteristics and their relationship with pelt quality in Zandi sheep breed]

Objective: The Study on follicle characteristics and thier relationship with pelt quality in Zandi sheep breed

Design: Sampling and laboratory activities

Animals: Fiftytive ewes [2, 3 and 4 years old] ,15 rams [2 and 3 years old] and 30 lambs [1-3 days old] of Zandi sheep breed

Procedure: Skin biopsy from the right flank of each sheep in one centimeter in diamiter and skin processing, blocking samples, cutting sections, sacpic stain, counting the follicles by graticule and microscope and visual evaluation of the pelts amb's

Results: The primary follicles density in rams, ewes and lambs was estimated as 2.7[ +/- 0.51],4[ +/- 0.98], 12.5 [ +/- 2.2] per mm` respectively. The Secondary follicles density in rams, ewes and lambs were esimated as 12.2 [ +/- 2.14], 16.8 [ +/- 3.24] and 28.5 [ +/- 3.9] per mm` respectively. Secondary to Primary follicle ratios in rams, ewes and lambs were 4.5 [ +/- 0.7], 3.6 [ +/- 0.43], 2.8 [ +/- 0.21] respectively. There was a significant difference between follicle characteristics of 2 years old ewes and each of the other three and four years old ewes [P<0.05]. The effect of sex on follicle characteristics differences was significant too [P<0.05]. but correlation between follicle characteristics and pelt quality was not significant [P>0.05]

[Heritability estimates of skin follicle characteristics in Raieni cashmere goat]

Skin samples from 240 Raieni cashmere goats at different ages [3 months to 3 years] were taken from the right mid side of each goat. Least square means of primary follicle density [PF/mm[2]], secondary follicle density [PF/mm[2]] and ratio of secondary to primary follicles [SF/PF] were estimated to be 1.950 [ +/- 0.045] follicles / mm[2], 23.291[ +/- 1.044] follicles /mm[2] and 13.138[ +/- 1.058] respectively. Heritability of primary follicle density secondary follicle density and ratio of secondary to primary follicles were estimated to be 0.0[-] 0.221[ +/- 0.329] and 0.465[ +/- 0.331], respectively

Study on determination of reproductive potential in Iranian sturgeon broodstocks [Acipenser persicus borodin, 1897]

Reproductive potential had studied by determining of oocytes germinal vesicle [G.V] position amongst number of Iranian sturgeon spawners. To determine G.V. position the oocyte was bisected and examined under a dissecting microscope. The procedure made with a surgical scalpel or a single edge razor blade and making a cut along the animal vegetal axis. The different position of the G.V were observed and evaluated by classification index as following a] Spawners that were good candidates to spown by hormonotherapy in the regular spawing season were in stage IV and their classification index were less than 0.07 or 1/14/[p<0.07]. the results that were indicated with the eggs fertilization rate [%] were 90% 85% and 83% respectively. b] Spawners with classification index more than 0.07 were underdeveloped and didn't respond adequately to spawning induction a few of these spawners elected for further ripening but its fertilization rate were low as 70%- 76% respectively. Also the results of this study showed when the G.V. has migrated to the end of animal pole and is positioned in the cortical ooplasm with a dark spot area the, oocytes are considered capable of responding to the hormonal stimuli necessary for ovulation and best fertilization

[Histopathological investigations of the vesicular glands in native bull in Iran]

Seminovesiculitis syndrome is one of the common difficulties of the seminal vesicle glands encountered in all ages and is caused by microbial, viral, protozoal and clamidial agents in primary and secondary form. Obstructions and stenosis of the ejaculatory duct, prostatic hyper-plasia, cystitis, prostitis and progress of infection through the prputial sheath. Sperm of Such animals have difficulties from the point of view of mobility, freezing ability, quality and fertility. Rate of seminovesiculitis in bulls in this study was 2.1 percent and microscopical disorders were as follows: seminovesiculitis with and without pus production senile atrophy, hyperplasia of the covering epithelium, congenital hyper- plasia, cystic hyper-plasia of right vesicular gland edema and hemorrhage

[ morphological studies on vesicular glands of native Iranian mature bull]

More than three hundred vesicular glands of native Iranian bull in different ages were Collected. Their morphology, form, Position and relations to other organs were studied completely. Their weights and volumes were measured. Plastic solution of resin were injected through main excretory ducts of right and left glands and casts of ducts were produced. The vesicular glands are the largest of the accessory genital glands in the ruminants. They are paired and lies, cranial to the pelvic urethra. The glands were long and lobulated. Each glands have a long main excretory duct which is divided to several small branches in the lobules. The excretory duct joins the terminal part of the ampulla of ductus deferens. There were significant differences [P < 0.05] between aged groups in relation to length, width, weight and volumes. Glands of 4 to 5 years old bull have largest length and width. But glands of 10 years old bull have least dimentions. The symmetrical vesicular glands of the 4 to 5 years old bull have largest weight and volume. There were no significant, linear regression between means of length, width, weight and volumes of the glands by using student test

[Microscopical studies of the skin thickness in Iranian camel]

Skin samples were taken from six different areas, of twelve Iranian camels [Camelus dromedarius]. These samples were selected from camels being slaughtered in Tehran abbatour randomly. The sites for sampling were as fallows: lower lip region, regio masseterica, regio epigastrium, regio exiphoidea, regio branchii and regie femoris. Histological preparation and measurement on the thickness of different skin layers were carried out and statistical analysis of the data was also performed the results are as followed. The epidermis consisted essentially of stratified squmous keratinized epithelium. It contained melanocytes, slightly flattend cells and flattened polygonal cells. The keratinizing epidermal cells were located the most superficially. Although the thickness of the skin varied significantly in different parts of selected samples. The epidermis lower lip region and regio masseterica were thicker. The dermis was composed of dense connective tissue that supported the epidermis and tightly attached to hypodermis, which was consisted of dense connective tissue. The thickness of dermis varied depending on the body region, reaching its maximum length of I mm on the epigastrium. The hypodermis consisted of dense connective tissue that was bound to the skin tightly. The thickness of dermis was up to 3 mm and it was the thickest part of the skin of all examined samples