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OJVRTM
Online Journal of
Veterinary Research©
Volume 24(10): 578-583, 2020.
Fresh versus thawed sperm characteristics from Holstein bulls taken
during cool and warm seasons.
¹Qusay Mohammed Aboud, ¹Saad Akram Hatif ,
²Faris Faisel
Ibrahim,
²Wafa’a Yeedam
Lateef, 2Omar Adel Mohammad
¹Surgery and Obstetrics,
College of Veterinary Medicine, University of Baghdad; ²Ministry of Agriculture,
Artificial Insemination Center-Baghdad.
ABSTRACT
Aboud QM, Hatif
SA, Ibrahim FF, Lateef WY, Mohammad OA.,
Fresh versus thawed sperm
characteristics from Holstein bulls taken during cool and warm seasons in Iraq,
Onl J Vet Res., 24(10): 578-583, 2020. We report fresh and thawed sperm
characteristics from 160 ejaculates collected from fifteen 4-5 year Holstein
bulls by artificial vagina during December (~12C), January (~9C), February
(~10C), March (~11) and September (~35C). We evaluated semen motility, death and
abnormalities in fresh and thawed samples. Compared with the cooler months we
found decreased motility (~-17%) but increased mortality (~24%) and abnormal
~10% spermatozoides in fresh samples collected in the
warmer month of September. In thawed samples these values were similar ~-15%,
~18% and 8 % respectively. Our results suggest high sensitivity of fresh sperm
to high ambient temperatures with lower temperatures favoring semen quality.
Keywords:
Season, collection, Bull semen, Viability, Motility, Abnormal.
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