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    The effects of the feeding duration of propylene glycol on major meat quality parameters and substantial proteins in the muscle of Akkaraman lambs
    (Elsevier Sci Ltd, 2024) Yakan, Akin; Ozkan, Huseyin; Kaya, Ufuk; Keceli, Hasan Huseyin; Karaaslan, Irem; Dalkiran, Sevda; Akcay, Aytac
    In this study, the effects of propylene glycol (PG) on meat quality and molecular pathways related to energy metabolism in longissimus lumborum muscle on lambs were evaluated. Seventy-two lambs were divided into three groups consisting of 60th, 90th, and 120th of slaughter days. The dosage of the PG and slaughter days were the variables used in the study. Eight animals were slaughtered from each group on each day. The meat quality parameters (e.g., pH, protein, fatty acid profile) and IGF-1, IGFBP4, and DGAT1 (i.e., mRNA and protein levels) were evaluated. The pH 45 min post-slaughter was higher in PG groups on 120th day. On the 4th day after slaughter, the b value was the lowest in the PG3, while 7th day after slaughter it was highest in Con and PG3 on 90th day. The total n3 and n6 were lowest and the NV was highest on 120th day. The IGFBP4 was upregulated in the PG groups on all of the slaughter days. The DGAT1 was upregulated in the PG3 on the 90th day. The IGF-1, DGAT1, IGFBP4 protein levels were found to have increased in the PG3 on 90th day. The IGFBP4 was found to have decreased in the PG3 on 120th day. According to the results of the study, the oral administration of the PG at the 3 mL/kg live weight0.75 for at least 120 days may have positive effects on meat quality in lambs through the IGF-1, DGAT1, and IGFBP4 genes and the proteins encoded by these genes.
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    Efficiency of vaginal electrical impedance to determine the stage of the reproductive cycle in bitches
    (Polish Soc Veterinary Sciences Editorial Office, 2018) Gurler, Hande; Koldas, Ece; Onyay, Firdevs Binli; Akcay, Aytac
    A study was carried out to compare the efficiency of vaginal electrical impedance with serum progesterone profile, cytological examination and clinical findings. Vaginal electrical impedance values varied at the different stages of the estrous cycle, with the highest value during the transition into estrous and the lowest in diestrus (P < 0.05). There was a negative statistical correlation between serum progesterone values and the impedance values (36%) (P < 0.001). Vaginal electrical impedance was a faster and cheaper method than progesterone assessment. It was more reliable than vaginal cytology and clinical evaluation. In conclusion, a combination of vaginal electrical impedance measurements and progesterone evaluation was a more useful method for determination of the optimal breeding time in bitches.
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    Paddock Behaviors and Dominance Relationships of Young Male Horses The First Hour in the Morning and Again in the Afternoon
    (Medwell Online, 2012) Yakan, Akin; Akcay, Aytac; Durmaz, Serhan; Aksu, Taylan; Ozturk, Hasan
    The time budget, frequency of physiological necessities and factors related to dominance rank were studied in Cold Blooded Breed (CBB) and Warm Blooded Breed (WBB) male horses. The subjects were investigated during the 1st h in a paddock after confinement in the morning and again in the afternoon. Proportion of feeding. was the largest among time budget activities and significantly different (p<0.05) between observation periods. Proportions of locomotion, resting and playing were statistically different (p<0.05; p<0.01 and p<0.001) between both breeds and both observation periods. No differences were found for living activities such feeding, drinking and elimination (urination and defecation) between the CBB and WBB horses. Dominance hierarchy was linear and positively correlated (p<0.01) with weight but not serum testosterone levels and age. The results showed that feeding activity was very important at the 1st h in the paddock. Additionally, the weight of the colts had an effect on dominance rank.