References
- Abecia JA, Forcada F, Gonzalez-Bulnes A. 2012. Hormonal control of reproduction in small ruminants. Anim. Reprod. Sci. 130:173-179. https://doi.org/10.1016/j.anireprosci.2012.01.011
- Al Samarrae SH. 2009. Semen quality of Arrabi and Karradi Iraqi rams. Diyal. Agric. Sci. J. 1:30-36.
- Amir D and Volcani R. 1965. Seasonal fluctuations in the sexual activity of Awassi, German Mutton Merino, Corriedale, Border- Leicester and Dorset Horn rams: I. Seasonal changes in semen plasma volume and its fructose and citric acid concentrations. J. Agric. Sci. 64:115-120. https://doi.org/10.1017/S0021859600010558
- Dorostgoal M. 2006. Histological and morphometrical studies of seminiferous tubules and leydig cells of Khouzestan Arabian rams in different seasons of a year by light and electron microscope. University of Shahid Chamran, Ahwaz, Iran, pp. 74-122.
- FAO. 1991. Asian livestock. Monthly technical magazine of the FAO. Animal Production and Health Commission for Asia and the Pacific (APHCA). 8:85-87.
- Fowler DG. 1965. Semen quality of Merino rams. 1. The effects of fleece length and season on semen quality. Aust. J. Exp. Agric. 5:243-246. https://doi.org/10.1071/EA9650243
- Galil KAA and Galil AKA. 1982. Seasonal variation in some characteristics of seminal plasma of Sudan Desert sheep in the tropics. J. Agric. Sci. 99:45-49. https://doi.org/10.1017/S0021859600055015
- Gundogan M. 2007. Seasonal variation in serum testosterone, T3 and andrological parameters of two Turkish sheep breeds. Small Rumin. Res. 67:312-316. https://doi.org/10.1016/j.smallrumres.2005.11.005
- Hamidi A, Mamouei M, Mirzadeh K, Tabatabaei S, Roshanfekr H. 2010. Seasonal changes of blood testosterone concentration and its association with reproductive parameters in Arabian breed ram. Proc 4th Iranian Cong Anim Sci, Tehran, September 20-21, pp. 426.
- 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. https://doi.org/10.1016/S0378-4320(97)00063-8
- Karagiannidis A, Varsakeli S, Karatzas G. 2000. Characteristics and seasonal variations in the semen of Alpine, Saanen and Damascus goat bucks born and raised in Greece. Theriogenology 53:1285-1293. https://doi.org/10.1016/S0093-691X(00)00272-7
- Kunavongkrit A, Suriyasomboon A, Lundeheim N, Heard TW, Einarsson S. 2005. Management and sperm production of boars under differing environmental conditions. Theriogenology 63:657-667. https://doi.org/10.1016/j.theriogenology.2004.09.039
- Land RB and Carr WR. 1975. Testis growth and plasma LH concentration following hemicastration and its relation with female prolificacy in sheep. J. Reprod. Fertil. 45:495-501. https://doi.org/10.1530/jrf.0.0450495
- Malejane CM, Greyling JPC, Raito MB. 2014. Seasonal variation in semen quality of Dorper rams using different collection techniques. South Afr. J Anim. Sci. 44:26. https://doi.org/10.4314/sajas.v44i1.4
- Moghaddam GH, Pourseif MM, Rafat SA. 2012. Seasonal variation in semen quantity and quality traits of Iranian crossbred rams. Slovak J. Anim. Sci. 45:67-75.
- Onstad O. 1967. Studies on postnatal testicular changes, semen quality, and anomalies of reproductive organs in the mink. Acta Endocrinol. 55(3_Suppl):S9-SNP. https://doi.org/10.1530/acta.0.055S009
- Suhair SM and Abdalla MA. 2010. Effects of level of feeding and season on thermoregulation and semen characteristics in Desert rams (Ovis aries). Glob. Vet. 4:207-215.
- Swelum AA, Alowaimer AN, Abouheif MA. 2014. Effects of breed and number of embryos transferred on the efficacy of MOET in sheep. J. Anim. Vet. Adv. 13:98-103.
- Swelum AA, Alowaimer AN, Abouheif MA. 2015. Use of fluorogestone acetate sponges or controlled internal drug release for estrus synchronization in ewes: Effects of hormonal profiles and reproductive performance. Theriogenology 84:498-503. https://doi.org/10.1016/j.theriogenology.2015.03.018
- Swelum AA, Ayadi M, Alhidary I, Alowaimer A, Abouheif M. 2017. The relationships between body fatness, leptin, testosterone, and reproductive performance in ram lambs as affected by level and frequency of feeding. Theriogenology 89:79-85. https://doi.org/10.1016/j.theriogenology.2016.10.013
- Swelum AA, Saadeldin IM, Moumen AF, Ali MA, Alowaimer AN. 2018a. Efficacy of controlled internal drug release (CIDR) treatment durations on the reproductive performance, hormone profiles, and economic profit of Awassi ewes. Small Rumin. Res. 166:47-52. https://doi.org/10.1016/j.smallrumres.2018.07.018
- Swelum AA, Saadeldin IM, Moumen AF, Ali MA, Ba-Awadh H, Alowaimer AN. 2018b. Efficacy of using previously used controlled internal drug release (CIDR) insert on the reproductive performance, hormone profiles and economic measures of sheep. Reprod. Domest. Anim. 53:1114-1122. https://doi.org/10.1111/rda.13212
- Talebi J, Souri M, Moghaddam A, Karimi I, Mirmahmoodi M. 2009. Characteristics and seasonal variation in the semen of Markhoz bucks in western Iran. Small Rumin. Res. 85:18-22. https://doi.org/10.1016/j.smallrumres.2009.06.017
- Todini L, Malfatti A, Terzano GM, Borghese A, Pizzillo M, Debenedetti A. 2007. Seasonality of plasma testosterone in males of four Mediterranean goat breeds and in three different climatic conditions. Theriogenology 67:627-631. https://doi.org/10.1016/j.theriogenology.2006.09.023
- Yu YJ, Park SH, Shin SM, Yang BC, Seong PN, Woo JH, Kim NY, Son JK. 2017. Effect of ovarian changes according to four season for reproduction of Jeju crossbred horses. J. Emb. Trans. 32:177-182. https://doi.org/10.12750/JET.2017.32.3.177
- Zarazaga LA, Guzman JL, Dominguez C, Perez MC, Prieto R. 2009. Effects of season and feeding level on reproductive activity and semen quality in Payoya buck goats. Theriogenology 71:1316-1325. https://doi.org/10.1016/j.theriogenology.2009.01.007
- Zarei MA, Farshad A, Akhondzadeh S. 2009. Variations in thyroidal activity during estrous cycle and natural breeding season in Markhoz goat breeds. Pak. J. Biol. Sci. 12:1420-1424. https://doi.org/10.3923/pjbs.2009.1420.1424