| More

Investigation of the changes observed in scrotal circumference, and native and post-thaw semen characteristics in karayaka rams during the breeding and nonbreeding seasons

Views: 581 Downloads: 347


The aim of the present study was to investigate and compare the impact of the breeding (BS) and non-breeding (NBS) seasons on scrotal circumference, and native and post-thaw semen characteristics in Karayaka rams. Six (6) Karayaka rams were used as semen donors, and ejaculates were collected with the aid of an artificial vagina during the BS (October-November) and NBS (April-May). Interestingly, sperm freezability was found to be higher in the NBS, when compared to the BS, and the sperm motility rate (36.00±2.74%, 55.0±3.24%) and percentage of abnormal sperm (44.00±1.90%, 57.00±2.09%) were found to significantly differ with season (P<0.05). In conclusion, the post-freezing sperm motility was better during the non-breeding season. Post-thaw sperm abnormality was higher during non-breading season. However, if ram semen is used fresh for AI, it can be collected and used during both during the breeding and non-breeding season.


freezability; karayaka rams; seasonal variation; semen characteristics

Full Text:



Ali H, Taha MB (2012) Effect of reproductive season and semen collection on the concentration of some reproductive hormones of Awassi rams. Iraqi J Vet Sci 26:75-81.

Aller JF, Aguilar D, Vera T, Almeida GP, Alberio RH (2012) Seasonal variation in sexual behavior, plasma testosterone and semen characteristics of Argentine Pampinta and Corriedale rams. Span J Agric Res 10:345-352.

Budai C (2014) Gelatines antioxidants and the effect of environmental factors on the andrological parameter of rams. Thesis, University of Debrecen, doctoral school of animal husbandry. Coloma MA, Brunet AG, Velazquez R, Diaz AT, Sebastian AL, Moreno JS (2010) Freezability of Iberian ibex (Capra pyrenaica) sperm according to the glycerolization temperature and plasma testosterone concentration. Cryobiology 61:204-210.

D’Alessandro AG, Martemucci G (2005) Post-thaw survival and acrosome integrity of spermatozoa of Leccese rams frozen in different seasons with a milk-egg yolk extender. Ital J Anim Sci 4:139-148.

Evans G, Maxwell WMC (1987) Salamon’s Artificial Insemination of Sheep and Goats. Butterworths Sydney 107-141.

Folch J (1984) The influence of age, photoperiodism and temperature on semen production of rams. In: M.E. Courot (ed.).The male in farm animal reproduction. Springer, Amsterdam. pp. 141-160.

Ibrahim SA (1997) Seasonal variations in semen quality of local and crossbred rams raised in the United Arab Emirates. Anim Reprod Sci 49:161-167.

Jackson GL, Jansen H, Kao C (1990) Continuous exposure of Suffolk ewes to an equatorial photoperiod disrupts expression of the annual breeding season. Reprod Biol 42: 63-73.

Kafi M, Safdarian M, Hashemi M (2004)Seasonal variation in semen characteristics, scrotal circumference and libido of Persian Karakul rams. Small Rum Res 53:133-139.

Karagiannidis A, Varsakeli S, Alexopoulos C, Amarantidis I (2000) Seasonal variation in semen characteristics of Chios and Friesian rams in Greece. Small Rum Res 37:125-130.

Kaymakci M, Oguz İ, Ün C, Bilgen G, Taskin T (2001) Basic characteristics of some Turkish indigenous sheep breeds. Pak J Biol Sci 4:916-919.

Kulaksiz R, Daskin A, Akcay E (2010) A study on morphometric measurements of testes and spermatologic features of Karayaka rams during nonbreeding season. Ankara Univ Vet Fak Derg 57:263-265.

Kumar D, Jhamb D, Kumar N, Saxena A (2014) Effect of breeding and non breeding seasons on post thaw quality of stallion semen. Indian J Anim Sci 35: 33-38.

Makawi SA, Elsharif BA, Babiker EA (2007) Effect of season on freezability of semen from two breed types of desert sheep in the Sudan. J Anim Vet Adv 6:846-849.

Mandiki SNM, Derycke G, Bister JL, Paquay R (1998) Influence of season and age on sexual maturation parameters of Texel, Suffolk and Ile-de-France rams: 1. Testicular size, semen quality and reproductive capacity. Small Rum Res 28:67-79.

Olah J, Kusza S, Harangi S, Janós P, Kovács A, Pécsi A, Budai C, Jávor A (2013) Seasonal changes in scrotal circumference, the quantity and quality of ram semen in Hungary. Archiv Fur Tierzuch 56:102-108.

Olfaz M, Soydan E, Onder H, Ocak N (2010). The oestrous behavior of the karayaka sheep in turkey. Asian J Anım Vet Adv 5:93-102.

Rickard JP, Schmidt RE, Maddison JW, Bathgate R, Lynch GW, Druart X, de Graaf SP (2014) Variation in seminal plasma alters the ability of ram spermatozoa to survive cryopreservation. Reprod Fertil Dev 28:516-523.

Schafer S, Holzmann A (2000) The use of transmigration and spermac stain to evaluate epididymal cat spermatozoa. Anim Reprod Sci 59:201-211.

Tajangookeh HD, Shahneh AZ, Shahrebabak MM, Shakeri M (2007) Monthly variation of plasma concentrations of testosterone and thyroid hormones and reproductive characteristics in three breeds of Iranian fat-tailed rams throughout one year. Pak J Biol Sci 10:3420-3424.

Zamiri MJ, Khodaei HR (2005) Seasonal thyroidal activity and reproductive characteristics of Iranian fat-tailed rams. Anim Reprod Sci 88:245-255.

Zamiri MJ, Khalili B, Jafaroghli M, Farshad A (2010) Seasonal variation in seminal parameters, testicular size, and plasma testosterone concentration in Iranian Moghani rams. Small Rum Res 94:132-136.


  • There are currently no refbacks.

Copyright (c) 2019 R. KULAKSIZ, C. CEBI SEN

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.