Keywords : Season


Effect of season on embryo production in Iraqi local black goat

Abdulstar Majeed; Ihsaan H. Al-Timimi; Mudafer N. AL-Saigh

Iraqi Journal of Veterinary Sciences, 2019, Volume 33, Issue 1, Pages 59-65
DOI: 10.33899/ijvs.2019.125514.1036

The aim of this study was to investigate the effect of season on embryo production in Iraqi local black goat. 599 female genital system of Iraqi local black goat were collected from AL-Fallujah abattoir, AL-Anbar province during the period from July 2010 to the 1st July 2011. The oocytes were collected via aspiration and slicing. Only good and fair quality oocytes were selected for in vitro maturation. Fresh semen were used from two Bucks of proven fertility for fertilization . TALP , MEM , and TCM-199 culture media were used of in-vitro maturation (IVM) and in-vitro fertilization (IFV). It has been shown that high recovery and maturation rate 87.3% and 45.6% respectively were observed at breeding season as compared with recovery rate 72.5% and maturation rate 35.2% respectively in non-breeding season. There was a significant difference (P˂0.05) in recovery rate and maturation rate between different season. It has been found that fertilization rate was 60.05% in breeding season. While it has 33.9% in non-breeding season. There was a significant difference in fertilization rate (P˂0.05) between breeding and non-breeding season. Blastocyst obtained during breeding season was 56.41% , while it was 43.24% in non-breeding season. There was a significant difference (P˂0.05) between different season. It was concluded that there is an effect of season on oocyte recovery.

Comparison of seasonal effects on some hematological and biochemical parameters between ewes with subclinical mastitis and healthy ewes

R.N. Sani; M. Moezifar

Iraqi Journal of Veterinary Sciences, 2016, Volume 30, Issue 1, Pages 5-8
DOI: 10.33899/ijvs.2016.116861

This study was conducted to compare the effects of season on some hematological and biochemical parameters in ewes with subclinical mastitis and healthy ewes. A total of 1192 milk and blood samples were collected from ewes between February and April (791 samples in spring), August and October (401 samples in summer). California Mastitis Test (CMT), milk culture, hematologic and serum biochemical parameters were obtained from the medical records. Samples which were positive by bacterial culture and CMT as were deemed to have glands with subclinical mastitis (SCM). The prevalence of subclinical mastitis in our study was around 12% (in one year). Of 144 (18.2%) and 47 (11.72%) positive samples in CMT, 134 (16.94%) and 44 (10.97%) samples were positive for bacterial culture in spring and summer, respectively. Comparison of results of hematological and serum biochemical parameters in ewes with SCM and healthy ewes in spring and summer showed that WBC counts, total protein concentrations and plasma fibrinogen in both groups of ewes were significantly higher in spring than summer (P˂0.05). The results of the present study indicated that when interpreting hematological and serum biochemical parameters in ewes with SCM should be consider the effect of season on these parameters.