Abaigar, T., Domene, M.A. and Cassinello, J. 2012. Characterization of theestrous cycle and reproductive traits of the aoudad (Ammotragus lervia) in captivity. Theriogenology. 77: 1759–1766.
Alamy, M.A., Foote, R.H. and Hare, E. 2001. Sperm output and concentration in Finn and Dorset rams exposed to long and short- day lighting. J. Theriogenoly. 56: 839-854.
Almeida, O.F.X. and Lincoln, G.A. 1984. Reproductive photo refractoriness in rams and accompanying changes in the patterns of melatonin and prolactin secretion. Biology of reproduction. 30: 143–158.
Arrebola, F.A., Perez-Martin, C.C. and Santiago-Moreno, J. 2010. Limitation of seasonality in reproductive parameters of Mediterranean bucks, using photoperiod treatment. Small Ruminant Research. 89: 31–35.
Casao, A., Vega, S., Palacin, I., Perez-Pe, R., Lavina, A., Quintin, F.J., Sevilla, E., Abecia, J.A., Cebrian-Perez, J.A., Forcada, F. and Muino-Blanco, T. 2010. Effects of melatonin implants during non-breeding season on sperm motility and reproductive parameters in Rasa Aragonesa rams. Reproduction in Domestic Animals. 45: 425–432.
Coloma, M.A., Toledano-Diaz, A., Castano, C., Velazquez, R., Gomez-Brunet, A., Lopez Sebastian, A., and Santiago-Moreno, J. 2011. Seasonal variation in reproductive physiological status in the Iberian ibex (Capra pyrenaica) and its relationship with sperm freezability. Theriogenology. 76:1695–1705.
Chemineau, P., Malpaux, B., Brillard, J.P. and Fostier, A. 2007. Seasonality of reproduction and production in farm fishes, birds and mammals. Animal. 1: 419–432.
Delgadillo, J.A. 2011. Environmental and social cues can be used in combination to develop sustainable breeding techniques for goat reproduction in the subtropics. Animal. 5: 74–81.
Delgadillo, J.A., Cortez, M.E., Duarte, G., Chemineau, P. and Malpaux, B. 2004. Evidence that the photoperiod controls the annual changes in testosterone secretion, testicular and body weight in subtropical male goats. Reproduction Nutrition Development
. 44: 183–193.
Delgadillo, J.A., Hochereau-de Reviers, M.T., Daveau, A., Chemineau, P. 1995. Effect of short photoperiodic cycles on male genital tract and testicular parameters in male goats (Capra hircus). Reproduction nutrition development.
Delgadillo, J.A., Leboeuf, B. and Chemineau, P. 1993. Maintenance of sperm production in bucks during a third year of short photoperiodic cycles. Reproduction Nutrition Development
. 33: 609–617.
Donmez, N., Karaca, F., Belge, F. and Ates, C.T. 2004. The effects of melatonin application on some hematological parameters and thyroid hormones and testosterone in male goats’ non breeding season. Veterinarski Archiv. 74: 281–287.
El-Sisy, G.A., El-Nattat, W.S. and El-Sheshtawy, R.I. 2008. Effect of superoxide dismutase and catalase on viability of cryopreserved buffalo spermatozoa. Global Veterinaria. 2: 56-61.
Fitzgerald, J.A. and Stellflug, J.N. 1991. Effects of melatonin on seasonal changes in reproduction of rams. Journal of animal science. 69: 264–275.
Gomez-Brunet, A., Santiago-Moreno, J., Malpaux, B., Chemineau, P., Tortonese, D.J. and Lopez-Sebastian, A. 2012. Ovulatory activity and plasmaprolactin concentrations in wild and domestic ewes exposed to artificial photoperiods between the winter and summer solstices. Animal Reproduction Science
. 132: 36–43.
Hanif, M. and Williams, H.L. 1991. The effect of melatonin and light treatment on reproductive performance of yearling Suffolk rams. British Veterinary Journal.
Izzo, G., Francesco, A., Ferrara, D., Campitiello, MR., Serino, I., Minucci, S. and dIstria, M. 2010. Expression of melatonin (MT1, MT2) andmelatonin-related receptors in the adult rat testes and during development. Zygote. 18: 257–64.
Johnston, J.D., Klosen, P., Barrett, P. and Hazlerigg, D.G. 2006. Regulation of MT melatonin receptor expression in the foetal rat pituitary. Journal ofneuroendocrinology. 18: 50–56.
Kaya, A., Baspinar, N., Yildiz, C., Kurtoglu, F., Ataman, M.B. and Haliloglu, S. 2000. Influence of melatonin implantation on sperm quality, biochemical composition of the seminal plasma and plasma testosterone levels in rams. Revue deMédecine Vétérinaire. 151(12): 1143-1146.
Kokolis, N., Theodosiadou, E., Tsantarliotou, M., Rekkas, C., Goulas, P. and Smokovitis, A. 2000. The effect of melatonin implants on blood testosterone and crosome activity in spermatozoa of the ram. Andrologia. 32: 107–114.
Lopez, E., Brea, G., Palomares, M.D., Perez, S.S. Garzon, Gigler, A. and Montoro, V. 1996. Sperm Characteristics of Manchego ram lambs treated by melatonin implants. Arch de Zootec. 45: 395-401.
Martin, G., Fisher, J., Blackbery, M., Boukhliq, R., Hotzel, M., Miller, D., Shepherd, K. and Walkden- Brown, S. 1994. Nutritional and photoperiodic control of testicular size in suffolk and Merino rams.Australian society of animal production. 20: 427.
Mukasa-Mugerwa, E. and Ezaz, Z. 1992. Relationship of testicular growth and size to body weight and onset of puberty in Menz ram lambs. Theriogenol. 38: 979-988.
Palacin, I., Abecia, J.A., Forcada, F., Casao, A., Cebrian, J.A., Muino, T., Palacios, C. and Pontes, J.M. 2008. Effects of exogenous melatonin treatment on out-of-season ram fertility. Italian Journal of Animal Science. 7: 199–206.
Ramadan, T.A., Taha, T.A., Samak, M. A. and Hassan, A. 2009. Effectiveness of exposure to longday followed by melatonin treatment on semen characteristics of Damascus male goats during breeding and non-breeding seasons. Theriogenology. 71:458–68.
Roca, J., Martinez, E., Vazquez, J. M., Ruiz, S. and Coy, P. 1991. Influence of season on testicle size and libido in male goats from the Mediterranean area. Animal Production. 52: 317-321.
Rosa, H.J.D., Juniper, D.T., and Bryant, M.J. 2000. Effects of recent sexual experience and melatonin treatment of rams on plasma testosterone concentration, sexual behavior and ability to induce ovulation in seasonally anestrous ewes. Journal of reproduction and fertility
. 120: 169–176.
Rosa, H.J.D., Silva, C.C., and Bryant, M.J. 2012. The effect of melatonin treatment in rams on seasonal variation of testicular size and semen production parameters. Small Ruminant Research. 102: 197–201.
Shelton, M. 1978. Reproduction and breeding of goats. Journal of Dairy Science. 61: 994–1010.
Tuncer, P.B., Sarıozkan, S., Bucak, M. N., Ulutaş, P.A., Akalın, P.P., Buyukleblebici, S. and Canturk, F. 2011. Effect of glutamine and sugars after bull spermatozoa cryopreservation. Theriogenology. 75: 1459-1465.
Vanecek, J. 1998. Cellular mechanisms of melatonin action. Physiological reviews. 78: 3.
VanVuuren, R.J. Pitout, M.J. and van Aswegen, CH. 1992. J. Theron Profiles.
Putativemelatonin receptor inhuman spermatozoa. Clin Biochem. 25: 125–7.
Zarazaga, L.A., Gatica, M.C., Celi, I., Guzmán, J.L. and Malpaux, B. 2010. Effect of artificial long days and/or melatonin treatment on the sexual activity of Mediterranean bucks Small ruminant research. 93: 110–118.