Twelve growing Shami heifers available in Dier-Al-Hajar Station for
improving Shami Cattle weighing 115±3 kg and 178±4 days old were used to
determine the weekly hormonal concentrations of progesterone (P4) and
estradiol 17-β (E2) during the pre-
and puberty stages (6-14 mos). Blood
samples were collected weekly from the Jugular vein using vacutainer tubes
supported with K3EDTA.
Twelve growing Shami heifers available in Dier-Al-Hajar Station for
improving Shami Cattle weighing 115±3 kg and 178±4 days old were used to
monitor the daily growth of ovarian follicles (daily numbers, size, length and
number of waves, rate of gr
owth and regression) using Transrectal Ultrasound
Echo System (7.5 MHz probe) in 6-14 months-old heifers. Results indicated that
ovarian follicles developed in a wave pattern in all Shami heifers when they
were 6 months old and no significant differences in the number and size of
ovarian follicles were found between right and left ovaries. A cohort of 4 to 7
small follicles with a diameter 2-5 mm developed together and one of them was
selected for continual growth, became dominant and later regressed during the
pre-pubertal stage.
This study was carried out at Camel Research Station, Deer Al-Hajar,
Directorate of Animal Wealth Research, General Commission of Agricultural
Scientific Research to measure the testicular dimensions, TDs (Length, TL;
width, TW; Circumference, TC)
; the relationship between these parameters
and to use them as an indicator to determine the puberty age in Shami camel
males. Twenty five camel raised in the station were equally divided, according
to their age, into five groups: G1, almost one year,G2, G3, G4, and G5 were 2,
3, 4 and 5 years old, respectively.
This study was carried out at the Shami Goat Improvement Station at
Karahta. Twenty one week old Shami male goats were used to measure the
concentrations of testosterone and LH hormones in plasma over a period of 21
months, using the Enzyme Linked
Immune Sorbent Assay (ELISA), in order to
determine the sexual puberty age. All kids were housed and managed under the
husbandry regimes applied at Karahta station.
This Study was carried-out in Karahta station for improvement of Shami
goats, Directorate of Animal Production Research, Ministry of Agriculture and
Agrarian Reform. Fifty growing Shami male goats aged ٣ months, were used to
measure the growth rat
e of testicular parameters, their relation to the
development of body weight and the effect of several factors on their
development from weaning at ٣ months to ٢١ months of age. All kids housed
and managed under the same conditions.
