2017
DOI: 10.1590/1678-4162-8937
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Abstract: This study was conducted to investigate the effects of melatonin implantation on basic testicular characteristics and reproductive performance of Kivircik and Charollais rams and ewes during the nonbreeding season. In this study, 8 Kivircik and 6 Charollais rams were used. Rams were implanted with 54 mg melatonin according to the manufacturer's instructions. At melatonin implantation and at ram introduction the reproductive performance and testicular characteristics were evaluated. Throughout the experimental … Show more

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Cited by 3 publications
(6 citation statements)
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References 18 publications
(45 reference statements)
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“…Starting at 30d post-implantation, scrotal circumference (ScrotC), mass motility (MassM), individual motility (IndM), sperm concentration (CONC) and testosterone levels (TEST) were measured. For the ScrotC determination, testicles of the rams were pulled toward the lower part of the scrotum while rams were on a stand position, and then the widest part of the testicles was measured with a exible metric tape (Cevik et al 2017).…”
Section: Methodsmentioning
confidence: 99%
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“…Starting at 30d post-implantation, scrotal circumference (ScrotC), mass motility (MassM), individual motility (IndM), sperm concentration (CONC) and testosterone levels (TEST) were measured. For the ScrotC determination, testicles of the rams were pulled toward the lower part of the scrotum while rams were on a stand position, and then the widest part of the testicles was measured with a exible metric tape (Cevik et al 2017).…”
Section: Methodsmentioning
confidence: 99%
“…During seasons with long days, melatonin secretion is suppressed in ovine pinealocytes and reproductive activity gets disrupted (Lépinay et al 2021;Malpaux et al 1999;Ramírez-Ramírez et al 2021). In rams, testicular size, testosterone levels, daily sperm cell production and libido are reduced (Bustos-Obregón and Torres-Díaz, 2012;Casao et al 2010;Cevik et al 2017;Rosa et al 2012). In ewes, reproductive hormone concentrations decrease or become absent, which in turn ceases estrus and ovulation activities generating a seasonal anestrus (Arroyo et al 2007;Zarazaga et al 2011).…”
Section: Introductionmentioning
confidence: 99%
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“…Abattoir female and male gonads: Specimens were collected from Al-Shoáalla slaughterhouse located on the western side of Baghdad the capital from November.2017 to October 2018 as : Adult ram Testes (140 pairs) were collected from mature local rams; age is determined as possible according to the dental tables (if possible) in which; (70) pairs were collected within season from (27-11-2017 to 19-02-2018), while (70 pairs) was collected out of season from (04-04-2018 to 31-07-2018). Female Genitalia of the local breed (70 specimens) were obtained directly after slaughtering, (35) were collected within season from (26-11-2017 to 16-01-2018), and (35) were collected out of season from (03-04-2018 to 30-07-2018). Specimens of female and male genitalia were washed by tap water and carried from the slaughterhouse to the Laboratory by the cool box (4 -8°C) .…”
Section: Methodsmentioning
confidence: 99%
“…In addition, besides the individual differences, there are major differences between the breeds in the length of the breeding season and sexual activity [ 20 ]. Therefore, the effect of season on testicular measurements and semen quality has been investigated in numerous sheep breeds [ 21 ]. As a secondary objective, we aimed to evaluate seasonal variations in the testicular measurements of South African Mutton Merino rams during the transition from autumn to winter.…”
Section: Introductionmentioning
confidence: 99%