Abstract
This study was conducted at the animal farms of Animal Resource Department – college of Agri & Forestry Uni. of Mosul during the period from the 1st of December 2007 to the 1st of September 2008. Twenty four Awassi males (8-10 mounts aged) were used in the study. Divided in to four groups (6 animals each group) and treated as follows:
1st group represent the control. 2nd group the animals drenched with carbimazole (50mg/animal/day). 3rd group the animals drenched with carbimazole (50mg/animal/ day) and iodide salt in the feed (150 ppm). 4th group the animals drenched with thyroxine (750µg/animal/day).
Semen sample were collected by electrical ejaculator twice monthly along the Period of the study. Treatment effects were followed for three seasons: Winter (December, January and February), Spring (March, April, and May), Summer (June, July and August) Effects of treatment and seasons on body weight and semen characters including : Volume , colour, mass and individual motility , Sperm concentration, live & dead sperm %, abnormal sperm% and pH semen, as
well as, Seminal plasma characters as total protein, albumin, globulin. Cholesterol, and enzyme (ALT, AST) and some as hormonal concentrations as (T4,T3,TSH and testosterone) The results revealet the following :
A-Effect of treatment :
1-Treatment causes of high significant effects (P ≤ 0.01) on T4, T3,TSH, testosterone hormone concentration and on sperm mass motility and abnormal sperm %.
2- Treatment causes significant effects (P ≤ 0.05) on semen colour and on sperm individual motility and albumin,globulin and protein concentrations in seminal plasma .
B- Effect of seasons:
1-Season causes of high significant effects (P ≤ 0.01) and (T4) hormone concentration and seminal plasma cholesterol and on body weight, testosterone hormone concentration , semen volume , colour, mass and individual motility, sperm concentration, and live sperm % and on dead sperm % and semen (pH) .
2- Season causes significant effects (P ≤ 0.05) on seminal plasma globulin and total protein and on abnormal sperm % .
