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OJVRTM
Online Journal of Veterinary Research©
Volume 22 (6):513-517, 2018.
Nocturnal and diurnal plasma melatonin in season and non-seasonal
sheep during spring.
Saad Akram Hatif1,
Laith Sofian Younis2
1College(s) of
Veterinary Medicine, University of Baghdad, 2University of Tikrit –Iraq.
ABSTRACT
Hatif SA, Younis LS., Nocturnal and diurnal
plasma melatonin in season and non-seasonal sheep during spring, Onl J Vet Res., 22 (6):513-517, 2018. Plasma melatonin was
determined by ELISA in seasonal and non-seasonal Awassi
ewes during Spring (Iraq). Nocturnal (29.058 ±
3.86pg/ml) and diurnal (23.061 ± 2.71pg/ml) plasma MLT concentrations were
higher (P<0.05) in non-seasonal ewes compared with seasonal ones (20.00
± 2.59 and 14.57 ± 2.36 pg/ml). We found plasma melatonin higher (P <
0.03) in non-seasonal ewes (26.059 ± 2.85 pg/mL)
compared with seasonal ones (17.512 ± 2.06 pg/ml)
during the Spring photoperiod. Results suggest that
nocturnal MLT
concentration is higher than diurnal concentrations in seasonal and non-
seasonal local Awassi ewes at spring.
Key
word : Melatonin, nocturnal, diurnal, seasonal,
non-seasonal, Sheep.
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