LỜi cam đoan tôi xin cam đoan đây là công trình nghiên cứu khoa học của riêng tôi. Các số liệu, kết quả nghiên cứu nêu trong luận án này là trung thực, khách quan và chưa được ai bảo vệ ở bất kỳ học vị nào

Kumar, S., Sahni, K. L. and Bistha, G. S. 1993a. Cytomorphological characteristics of motile and static semen of buffalo bulls. Buffalo J. 2: 117-127.

Kumar, S., Sahni, K. L., Benjamin, B. N., Mohan, G. 1993b. Effect of various levels of yolk on deep freezing and storage of buffalo semen in different diluters without adding glycerol. Buffalo J. 1: 79-85.

Kumar, R. and Atreja, S. K. 2012. Effect of incorporation of additives in tris-based egg yolk extender on buffalo (Bubalus bubalis) sperm tyrosine phosphorylation during cryopreservation. Reprod. Domest. Anim. 47(3): 485-490

Kumaresan, A., Ansari, M. R., Garg, A. and Kataria, M. 2006. Effect of oviductal proteins on sperm functions and lipid peroxidation levels during cryopreservation in buffaloes. Anim. Reprod. Sci. 93: 246-257.

Kumaresan, A. and Ansari, M. R. 2001. Evaluation of conception rate in buffaloes (Bubalus bubalis) with reference to semen quality, stage of oestrus and inseminator. Indian J. Anim.Sci.71 (2): 144-145.

Lemma, A. 2011. Effect of cryopreservation on sperm quality and fertility. In: Manafi, M. (Ed), Artificial Insemination in Farm Animals: 191-216. Published online by InTech.

Liang Xian-wei, Yang Bing-zhuang, Zhang Xiu-fang, Zou Cai-xia and Huang You-jun. 2004. Progress of scientific research on buffaloes in China, Proc. of the Seventh World Buffalo Congress, Manila, Philippines, 20-23 Oct: 29-35.

Madan, M. L. 1985. Endocrine control of reproduction in buffaloes. In: Proceedings of the First World Buffalo Congr., vol. III, Cairo: 516-526

Mahmoud, K. G. M., El-Sokary, A. A. E., Abou El-Roos, M. E. A., Abdel-Ghaffar, A. D. and Nawito, M. 2013. Sperm Characteristics in Cryopreserved Buffalo Bull Semen and Field Fertility. Iranian Journal of Applied Animal Science. 3(4): 777-783.

Mandal, D. K., Nagpaul, P. K. and Gupta, A. K. 2000. Seasonal variation in seminal attributes and sexual behaviour of Murrah buffalo bulls. Indian Journal of Dairy Science. 53(4): 278-283.

Mandal, A. B., Paul, S. S. and Pathak, N. N. 2003. Nutrient Requirements and Feeding of Buffaloes and Cattle. International Book Distributing Co. Ltd., Lucknow, India.

Manik, R. S. and Mudgal, V. D. 1984. Monthly and seasonal variation in physiochemical and biochemical attributes of buffalo semen. World Review of Animal Prod. 20(4): 46-51

Mann, T. and Mann, C. L. 1981. Male Reproductive Funtion and Semen. Springer-Verlag Berlin. Heidelberg, New York, USA

Marai, I. F. M., El-Darawany A. A., Fadiel A. and Abdel-Hafez, M. A. M. 2008. Reproductive performance traits as affected by heat stress and its alleviation in sheep - a review. Tropical and Subtropical Agroecosystems. 8: 209-234.

Marai, I. F. M., Daader, A. H., Soliman, A. M. and El-Menshawy, S. M. S. 2009. Non-genetic factors affecting growth and reproduction traits of buffaloes under dry management housing (in sub-tropical environment) in Egypt. Livestock Research for Rural Development. 21(3). http://www.lrrd.org/ lrrd21/3/mara21030.htm

Marai, I. F. M. and Haeeb, A. A. M. 2010. Buffalo's biological functions as affected by heat stress - A review. Livestock Science. 127: 89-109.

Marshall, C. E. 1984. Considerations for cryopreservation of semen. Zoo Biol. 3: 343–-356.

Maurya, V. P., Tuli, R. K. and Goyal, R. L. 2003. Effect of buffer composition, sephadex grade and column size on filtration based quality improvement of semen from Murrah buffalo bull. Asian Australasian Journal of Animal Sciences. 16(2): 165-171.

Maxwell, W. M. C., Landers, A. J. and Evans, G. 1995. Survival and fertility of ram spermatozoa frozen in pellets, straws and minitubes. Theriogenology. 43: 1201-1210.

Mazur, P. 1984. Freezing of living cells: mechanisms and implications. Am. J. Physiol. 247: 125-142.

McCool, C. J. and Entwistle, K. W. 1989. The development of puberty and sexual maturity in the Australian Swamp buffalo bull. Theriogenology. 32: 171-184.

Medeiros, C. M. O., Forell, F., Oliveira, A. T. D. and Rodrigues, J. L. 2002. Current status of sperm cryopreservation: why is it better. Theriogenology. 57: 327-344.

Mohan, G. and Sahni, K. L. 1990. Efficiency of semen production in buffalo bulls. Acharya, R. M., Lokeshwar and R. R., Kumar, S. (Eds.), Recent Advances in Buffalo Research. 3: 14-16.

Molinia, F. C., Evans, G., Casares, P. I. and Maxwell, W. M. C. 1994. Effect of monosaccharides and disaccharides in Tris-based diluents on motility, acrosome integrity and fertility of pellet frozen ram spermatozoa. Anim. Reprod. Sci. 36: 113-122.

Morrell, J. M. 2006. Update on semen technologies for animal breeding. Reprod. Domest. Anim. 41: 63-67.

Mughal, D. H., Ijaz, A., Yousaf, M. S., Rehman, H., Aleem, M., Zaneb, H., Rabbani, I. and Wadood, F. 2013. The influence of taurine supplementation in lactose egg yolk glycerol extender for cryopreservation of buffalo bull (Bubalus bubalis) semen. Journal of Animal & Plant Sciences. 23(3): 715-720.

Narayan, P., Reddy, V. N. V., Sarma, P. A., Honnappa, T. G. 2000. Employment of the hypoosmotic swelling test (HOST) to evaluate sperm membrane integrity of fresh and frozen buffalo (Bubalus bubalis) bull semen. Buffalo Journal. 16(2): 207-213

Nasir, M., Zuhairah Abu Bakar, Md Zuki Saad, Mohd Zamri and Kassim Azhar. 2012. Evaluation of the semen quality of a buffalo bull in the Buffalo Breeding and Research Centre, Telupid, Sabah, Malaysia. In: 7th Proceedings of the Seminar in Veterinary Sciences, 27 February - 02 March, Universiti Putra Malaysia.

Nastri, M. J. F., Del Sorbo C., Fabbrocini, A., Fasano, G. and Sansone, G. 1994. Performances motility in cooled and freeze thawed B. bubalis spermatozoa at different osmotic pressures. In: Bradley, M. and Cummins, J. M. (eds), Proceeding of 7th Int. Symp. Spermatology, Cairns, Australia. Australian Society of Reproductive Biology, Victoria, Australia: 99-100.

Nazir, M., 1988. Semen evaluation and sperm morphology. Monograph on reproductive pattern of riverine buffaloes and recommendations to improve their reproductive performance at small farmer level. Pakistan Agri. Res. Council, Islamabad, Pakistan.

Nordin, W., Bongso, T. A. and Tan, H. S. 1985. Relationship of semen characteristics and testosterone profiles with age in growing swamp buffalo bulls (Bubalus bubalis). In: Buffalo Seminar, 29 April - 2 May, Bangkok, Thailand.

Nordin, W., Hilimi, M. and Bongso, T. A. 1990. Semen characteristics related to age in growing Swamp buffalo (Bubalus bubalis). Buffalo J. 6: 161-166.

Nowak, R. 1999. Walker’s Mammals of The World. 6th ed, Baltimore, MD, The Johns Hopkins University Press.

Otoi, T., Tachikawa, S., Kondo, S. and Suzuki, T. 1993. Effect of different lots of semen from the same bull on in vitrodevelopment of bovine oocytes fertilized in vitro. Theriogenology. 39: 713-718.

Pace, M. M. and Graham, E. F. 1974. Components in egg yolk which protect bovine spermatozoa during freezing. J. Anim. Sci. 39: 1144-1149.

Pace, M. M., Sullivan, J. J., Elliott, F. I., Graham, E. F. and Coulter, G. H. 1981. Effects of thawing temperature, number of spermatozoa and spermatozoa quality on fertility of bovine spermatozoa packaged in 0.5-ml French straws. J. Anim. Sci. 53: 693-701.

Pal, A., Chatterjee, P. N. and Chakravarty, A. K. 2012. Genetic study of dairy cattleand buffalo bulls based on growth, milk production and reproductive traits. Iranian Journal of Applied Animal Science. 2(3): 239-245. 

Palmer, C. W., Amundsson, S. D., Brito, L. F. C., Waldner, C. L. and Barth, A. D. 2004. Use of oxytocin to facilitate semen collection by electroejaculation or transrectal massage in bulls. Animal Reproduction Science. 80: 213-223.

Panangala, V. S., Winter, A. J., Wijesinha, A. and Foote, R. H. 1981. Decreased motility of bull spermatozoa caused by Mycoplasma bovigenitalium. Am. J. Vet. Res. 42: 2090-2093.

Pant, H. C. 2002. Increasing reproductive efficiency and productivity of cattle and buffaloes. In: Proceedings of the National Symposium on Reproductive Technologies for Augmentation of Fertility in Livestock of The Indian Society for Study of Animal Reproduction: 14-23

Park, N. K., Oh, W. Y., Lee, S. S., Oh, C. A., Kang, S. W., Ko, S. B., Kang, M. S. and Kim, H. S. 1995. Studies on semen freezing in Cheju native stallions. J. Agric. Sci. 37: 459-463.

Pasha, T. N. and Hayat, Z. 2012. Present situation and future perspective of buffalo production in Asia. The Journal of Animal and Plant Sciences. 22(3): 250-256.

Paul, S. S. and Lal, D. 2010. Nutrient requirements of buffaloes. Satish Serial Publishing House, New Delhi, India.

Persson, Y. 2007. Breeding soundness evaluation of young beef bulls. Doctoral thesis. Swedish University of Agricultural Sciences, Uppsala. http://pub.epsilon.slu.se/1374/1/YPfin0.doc.pdf

Pesch, S. and Hoffmann, B. 2007. Cryopreservation of spermatozoa in veterinary medicine. J. Reproduktionsmed. Endokrinol. 4(2): 101-105

Pickett, B. W. and Berndtson, W. E. 1974. The preservation of bovine spermatozoa by freezing in straws. A review. J. Dairy Sci. 57: 1287-1301.

Polge, C., Smith, A. U. and Parkes, A. S. 1949. Revival of spermatozoa after vitrification and dehydration at low temperatures. Nature (Lond.) 164:666.

Prajapati, K. B., Nagpaul, P. K., Singh, D. V. and Raina, V. S. 1998. The effect of exercise and feeding bypass protein on semen quality measures in Mehsana buffalo bulls. Indian Journal of Animal Reproduction. 19(2): 143-145

Pürhan Barbaros Tuncer, Mustafa Numan Bucak, Serpil Sarıözkan, Fatih Sakin, Deniz Yeni, İbrahim Hakkı Çiğerci, Ahmet Ateşşahin, Fatih Avdatek, Mustafa Gündoğan and Olga Büyükleblebici. 2010. The effect of raffinose and methionine on frozen/thawed Angora buck (Capra hircus ancryrensis) semen quality, lipid peroxidation and antioxidant enzyme activities. Cryobiology. 61(1): 89-93.

Quinn, P. J., Salamon, S. and White, I. G. 1968. The effect of cold shock and deep freezing on ram spermatozoa collected by electrical ejaculation and by an artificial vagina. Aust. J. Agric. Res. 19: 119-128.

Raina, V. S., Gupta, A. K. and Singh, K. 2002. Effect of antioxidant fortification on preservability of buffalo semen. Asian Australasian Journal of Animal Sciences. 15(1): 16-18

Rajamahendran, R. and Manickavadivale, S. 1981. Libido and semen characteristics of Murrah, Surti, and local buffalo bulls in Sri Lanka. Beitrage zur tropischen Landwirtschaft und Veterinarmedizin. 19(4): 455-459

Ramakrishnan P. and Ariff M. O. 1994. Effect of glycerol level and cooling rate on post-thaw semen quality of Malaysian swamp buffalo. In: Vale, W. G., Barnabe, V. H. and Mattos, J. C. A. de, Proceedings of 4th World Buffalo Cong, Sao Paulo, Brazil. International Buffalo Federation, Roma, Italy: 540-542.

Ramaswamy, V., Latha, N., Gnanasubramanian, T. and Manickam, R. 2002. Aerobic bacteria in buffalo semen and their antibiogram. Indian Journal of Animal Reproduction. 23(2): 117-119

Ramesha, K. P., Goswami, S. L. and Das, S. K. 1993. Zona-free hamster oocyte penetration test for assessing fertility of Murrah buffalo (Bubalus bubalis) bull. Buffalo J. 3: 259-263

Rana, C. M., Dhami, A. J., Zalu, G. K., Vibhakar, K. V. and Ladani, N. G. 2003. Preservation of Gir (Bos indicus) and Jafarabadi buffalo (Bubalus bubalis) semen at 5 degrees C and ultra-low temperature using sephadex filtration technique. Indian Journal of Animal Sciences. 73(8): 858-863

Rao, A. V. N., Haranath, G. B. and Somasekharam, G., 1990. Effect of equilibration and thawing rates on survival and acrosomal maintenance of buffalo spermatozoa in straws. In: Acharya, R. M., Lokeshwar, R. R. and Kumar, S. Eds. , Recent Advances in Buffalo Research. 3: 97-99

Rao, A. V. N. and Venkataramulu, M. C. 1994. Effect of single varsus double insemination on conception rate in bovines. Indian Vet. J. 71:1144-1145.

Rasul, Z., Anzar, M., Jalali, S. and Ahmad, N. 2000. Effect of buffering systems on post-thaw motion characteristics, plasma membrane integrity, and acrosome morphology of buffalo spermatozoa. Anim. Reprod. Sci. 59: 31-41.

Rasul, Z., Ahmad N. and Anzar, M. 2001. Changes in motion characteristics, plasmamembrane integrity and acrosome morphology during cryopreservation of buffalo spermatozoa. J. Androl. 22: 278-283.

Rasul, Z., Anzar, M., Jalali, S. and Ahmad, N. 2003. Effect of buffering system on post-thaw motion characteristics, plasma membrane integrity, and acrosome morphology of buffalo spermatozoa. Animal Reproduction Science. 59: 31-41.

Rasul, Z., Ahmed, N. and Anzar, M. 2007 Antagonist effect of DMSO on the cryoprotection ability of glycerol during cryopreservation of buffalo sperm. Theriogenology. 68: 813-819.

Raza, M. A., Riasat Ali and Chaudhry, R. A. 2005. Studies on semen productive ability and fertility trials of standard and routine donor buffalo bulls. Sarhad Journal of Agriculture. 21(4): 521-524.

Rehman, Z. U., Samo, M. U., Qureshi, T. A., Khan, S., Qureshi, M. S., Khan, F. A. and Bahadadr, S. 2012. Studies on the freezability of Kundhi buffalo bull semen. Journal of Animal and Plant Sciences. 22(2): 18-23.

Rodriguez-Martinez, H. 1998. Optimization of sperm quality in AI bulls. Reproduction in Domestic Animals. (33): 233-237.

Rohilla, R. K., Tuli, R. K. and Goyal, R. L. 2005. Comparative study of the effects of cryoprotective agents in freezing Murrah buffalo bull semen. Indian J. Vet. Res. 14: 37-43.

Saacke, R. G., De Jarnette, J. M., Nebel, R. L. and Nadir, S. 1991. Assessing bull fertility. In Proc. Soc. Theriogenology AGM. San Diego, CA: 56-69.

Sadeg Tajvidi Asr, Rahim Beheshti and Hamid Kohram. 2011. The evaluations of Tris-citrate acid or Bioxcell extenders on the post-thawed buffalo sperm parameters. Annals of Biological Research. 2(4): 360-365.

Saeed, A. 1988. Studies on morphology of buffalo bull semen of different age groups. Thesis. University of Agriculture. Faisalabad, Pakistan.

Saeed, A., Chaudhry, R. A., Khan, I. H. and Khan, N. U. 1990. Morphology of semen of buffalo bulls of different age groups. Proc. II World Buffalo Congr., Vol. 3. 12-16 December. New Dehli, India

Sajjad, M., Ali, S., Ullah, N., Anwar, M., Akhter, S. and Andrabi, S. M. H. 2007. Blood serum testosterone level and its relationship with scrotal circumference and semen characteristics in Nili-Ravi buffalo bulls. Pakistan Vet. J. 27(2): 63-66.

Salamon, S. and Maxwell, W. M. C. 2000. Storage of ram semen. Anim. Reprod. Sci. 62: 77-111.

Sandeep Jasial, Katoch R. C., Deepti Narang, Arvind Mahajan. 2000. The drug resistant bacteria associated with frozen semen technology of cow and buffalo bulls. Indian Journal of Animal Sciences. 70(5): 488-489

Sansone, G., M.J.F. Nastri and A. Fabbrocini. 2000. Storage of buffalo (Bubalus bubalis) semen. Animal Reproduction Science. 62: 55-76.

Saxena, V.B. and S.S. Tripathi. 1978. Studies on the physico-chemical attributes and freezability of semen of crossbred bulls. Indian J. Anim.Sci. 48: 865-69.

Senger, P. L., Becker, W. C. and Hillers, J. K. 1976. Effect of thawing rate and post-thaw temperature on motility and acrosomal maintenance in bovine semen frozen in plastic straws. J. Anim. Sci. 42: 932-936.

Settergren, I. 1994. Bull fertility examination. XIIth FAO/SIDA International Postgraduate Course on Animal Reproduction, III. Veterinary College. Upsala.

Shabd, R., Saxena, V. B. and Gupta, H. P. 2003. Protection of cell membrane of buffalo spermatozoa during cryopreservation. Indian Journal of Animal Reproduction. 24(2): 128-130

Shannon, P. and Vishwanath, R. 1995. The effect of optimal and suboptimal concentrations of sperm on the fertility of fresh and frozen bovine semen and a theoretical model to explain the fertility differences. Anim. Reprod. Sci. 39: 1-10.

Sharma, A. K. and Gupta, R. C. 1980. Duration of seminiferous epithelial cycle in buffalo bulls (Bubalus bubalis). Animal Reproduction Science. 3(3): 217-224.

Sharma, A. K., Rodriguez, L. A., Mekonnen, G., Wilcox, C. J., Bachman, K. C. and Collier, R. J. 1983a. Climatological and genetic effects on milk composition and yield. Journal of Dairy Science. 66: 119-126.

Sharma, D. B., Singh, C. S. P. and Mishra, H. R. 1983b. Growth rate in the she buffaloes. Indian Veterinary Medicine Journal. 60: 1017-1018.

Shelke, V. B. and Dhami, A. J. 2001. Comparative evaluation of physico-morphological attributes and freezability of semen of Gir cattle (Bos indicus) and Jafarabadi buffalo (Bubalus bubalis) bulls. Indian Journal of Animal Sciences. 71(4): 319-324.

Shukla, M. K. and Misra, A. K. 2005. Correlation between seminal characteristics in Murrah bulls. Indian Journal of Animal Sciences 75(3): 263-266 (Abstract).

Shukla, M. K. and Misra, A. K. 2007. Effect of Bradykinin on Murrah buffalo (Bubalus bubalis) semen cryopreservation. Anim. Reprod. Sci. 97: 175-179.

Siddique, M., Ali, R. and Ali. R. 2006. Short Communication: Effect of Buffers on Freezing of Buffalo Bull Semen. J. Agri. Soc. Sci. 2(2): 117-119.

Singh, B., Mahapatro, B. B. and Sadhu, D. P. 1969. Chemical composition of cattle and buffalo spermatozoa and seminal plasma under different climatic conditions. J. Reprod. Fert. 20: 175-178.

Singh, B. and Sadhu, D. P. 1973. Buffering capacity, and CO₂ and nitrogen contents of the seminal plasma of cattle and buffalo.  Indian Journal of Animal Sciences. 43(7): 579-583.

Singh, J., Pangawkar, G. R., Biswas, R. K., Srivastava, A. K. and Sharma, R. D. 1990. Studies on lactic dehydrogenase and sorbitol dehydrogenase release in relation to deep freezing of buffalo semen in certain extenders. Theriogenology. 34: 371-378

Singh, J., Pangawkar, G. R., Biswas, R. K. and Kumar, N. 1991. Studies on buffalo sperm morphology during various stages of freezing in certain extenders. Indian J. Anim. Reprod. 12: 126-129.

Singh, B., Sahni, K. L. and Mohan, G. 1995. Effect of osmolatity of extender on freezing of buffalo semen. Indian Journal of Animal Sciences. 65(1): 65-66.

Singh P. and Raina V. S. 1999. Comparative effect of certain additives on preservation of buffalo bull semen at refrigeration temperature. Indian Journal of Animal Production and Management. 15(2): 74-76

Singh, P., Sengupta, B. P. and Tripathi, V. N. 2001. Effect of Multiple Showering and Vitamin Supplementation on Sexual Behaviour, Quality and Freezability of Buffalo Bull Semen. Asian-Australasian Journal of Animal Sciences. 14(2): 184-188.

Singh, P. B. P., Sengupta B. P. and Tripathi, V. N. 2000a. Effect of supplemental amino acid feeding on sexual behaviour, quality and freezability of buffalo bull semen. Buffalo J. 1: 41-46

Singh, P., Jindal, J. K., Singh, S. and Hooda, O. K. 2000b. Freezability of buffalo bull semen using different extenders. Indian J. Anim. Reprod. 21: 41-42.

Singh, P., Dahiya, S. S., Chauhan, T. R., Singh S., Kumar, B., Sharma R.K. and Singh I. 2004. Effect of feeding different sources of rumen undegradable protein on sexual maturity and semen production in buffalo bulls. Indian Buffalo J. 2: 74-77.

Singh, P., Singh, I., Singh, S. and Sharma, R. K. 2006. Initial stage glycerolization prevents the incidence of backward sperm motility during cryopreservation and increases buffalo semen freezability. Indian J. Anim. Sci. 76: 777-779.

Singh, M. 2010. Effect of post-thaw cotton incubation on semen quality of buffalo bulls. Revista Veterinaria. 21(1): 873-878.

Singh, M., Chaudhari, B. K., Singh, J. K., Singh, A. K. and Maurya, P. K. 2013. Effects of thermal load on buffalo reproductive performance during summer season. Journal of Biological Sciences. 1(1): 1-8.

Singh, V. K., Kumar, R. and Atreja, S. K. 2014. Cryo-survival, cryo-capacitation and oxidative stress assessment of buffalo spermatozoa cryopreserved in new soya milk extender. Livestock Science. 160: 214-218.

Soderquist, L., Janson, K., Larsson, K. and Einarsson, S. 1991. Sperm morphology and fertility in AI bulls. J. Vet. Med. 38: 534-543.

Somparn, P., Gibb, M. J., Markvichitr, K., Chaiyabutr, N., Thummabood, S. and Vajrabukka, C. 2004. Analysis of climatic risk for cattle and buffalo production in northeast Thailand. Int. J. Biometeorol. 49: 59-64.

Stefanov, R., Sabev, M. and Ivanova-Kicheva, M. 2011. Protective effect of the antioxidant enzyme on sperm from (Bubalus bubalis) type after cryoconservation. Biotechnology in Animal Husbandry. 27(3): 943-949.

Stoianov, T. and Kostadinov, B. 1978. Attempts at freezing bull semen in a yolk-raffinose medium without glycerin. Vet. Med. Nauki. 15(3): 47-54.

Sukhato, P., Thongsodseang, S., Utha, A. and Songsasen, N., 2001. Effects of cooling and warming conditions on post-thawed motility and fertility of cryopreserved buffalo spermatozoa. Anim. Reprod. Sci. 67: 69-77

Sundararaman, M. N. and Edwin, M. J. 2008. Changes in Motility Characteristics of Goat Spermatozoa During Glycerol-Equilibration and the Relevance to Cryopreservation . Asian Journal of Cell Biology. 3: 22-33.

Supanuam, P., Alongkoad T., Sitthisak J., Wanpen K., Sarawut K. and Anan K. 2009. Standardized karyotype and idiogram of Thai native swamp buffalo, Bubalus bubalis (Artiodactyla, Bovidae) by convention staining, G-banding, C-banding and NOR-banding techniques. Thai Journal of Genetics. 3(1): 83-93.

Suryaprakasam, T. B., Rao, A. V. Narasimha and Rao, A. Narasimha.1993. Semen production traits in relation to age, body weight and scrotal parameters in Murrah buffalo bulls. Indian Veterinary Journal. 70(12): 1131-1134.

Suzuki, H., Foote, R. H., Farrell, P. B. 1997. Computerized imaging and scanning electron microscope (SEM) analysis of co-cultured fresh and frozen bovine sperm. J. Androl. 18(2): 217-26.

Swelum, A. A., Mansour, H. A., Elsayed, A. A. and Amer, H. A. 2011. Comparing ethylene glycol with glycerol for cryopreservation of buffalo bull semen in egg-yolk containing extenders. Theriogenology. 76: 833-842.

Talevi, R., Pelosi, S., Sansone, G., Graso, F. and Matasino, D. 1994. Effect of different prefreezing rates on buffalo sperm motility and ultrastructure preservation. In: Vale, W. G., Barnabe, V. H., Mattos, J. C. A de, Proceedings of 4th World Buffalo Cong Sao Paulo, Brazil. International Buffalo Federation, Roma, Italy: 537-539

Tarr, B. 2007. Cold Stress in Cows. from http://www.omafra.gov.on.ca/english/livestock/beef/facts/07-001.pdf (date 1/7/2012).

Tatham, B. 2000. Increasing Buffalo Production using reproduction technology. A report for the Rural Industries Research and Development Corporation. https://rirdc.infoservices.com.au /downloads/00-165.

Terezinha, A. P., Gomes, M., Castro, D., Eraldo, M., Jocelim, M. G. and Fernando, J. C. D. G. 1991. Physical and biochemical characteristics from Murrah buffalo bulls semen. 3rd Buffalo Cong. Bulgaria, Symp. IV: 571.

Terramoccia, S., Bartocci, S., Amici, A. and Martillotti, F. 2000. Protein and protein free dry matter rumen degradability in buffalo, cattle and sheep fed diets with different forage to concentrate ratios. Livestock Production Science. 65:185-195.

Tomar, N. S., Mishra, B. S. and Johari, C. B. 1966. Seasonal variations in reaction time and semen production, and prediction of some semen attributes on initial motility of spermatozoa in Hariana and Murrah bulls. Indian J. Dairy Sci. 19: 87-93.

Topanurak S., Intaramongkol, J., Ratanapunna, P., Intaramongkol, S., Tumwasorn S. and Chatalakhna C. 1991. Factors affecting growth performance in Thai swamp buffalo. Annual report 1988-1991, The national buffalo research and development project, Bangkok, Thailand: 17-25

Tuli, R. K., Mehar, S. and Matharoo, J. S., 1981. Effect of different equilibration times and extenders on deep freezing of buffalo semen. Theriogenology. 16: 99-104.

Valdez, C. A., Bautista, J. A. N., Rio, A. S. D., Flor, J. A. C. G. and Torres, E. B. 2003. Ethylene glycol as a cryoprotectant for freezing buffalo spermatozoa: I. Effects of concentration and equilibration time on post-thaw survival. Philipp. J. Vet. Med. 40: 37-43.

Vale, W. G. 1994a. Collection, processing and deep freezing of buffalo semen of buffalo semen. Buff. J. 2: 65-72.

Vale, W. G. 1994b. Reproductive management of buffalo under Amazon conditions. Buff. J. 10:85-90.

Vale, W. G. 1997. Sperm cryopreservation. Bubalus Bubalis. 1: 129–140.

Vale, W. G. 2010. Deep freezing buffalo semen - state of art. Proceedings of the 9th World Buffalo Congress, Buenos Aires, 25-28 Abril: 83-92.

Veeramachaneni, D. N. R., Ott, R. S., Heath, E. H., Mcentee, K., Bolt, D.J. and Hixon, J.E. 1986. Pathophysiology of small testes in beef bulls relationship between scrotal circumference, histopathologic features of testes and epididymides, seminal characteristics, and endocrine profiles. Amer. J. Vet. Res. 47: 1988-1999.

Vishwanath, R. and Shannon, P. 2000. Storage of bovine semen in liquid and frozen state. Anim. Reprod. Sci. 62: 23-53.

Waheed, S., Ahmad, N., Najib-ur-Rahman, Jamil-ur-Rahman, H., Younis, M. and Iqbal, S. 2012. Evaluation of duck egg yolk for the cryopreservation of Nili-Ravi buffalo bull semen. Anim. Reprod. Sci. 131(1-2):95-99.

Waites, G. M. H. and Setchell, B. P. C. 1990. Physiology of the mammalian testis. In: Marshalls Physiology of Reproduction, 4thEd. Lamming, G.E. Churchill Livingstone (Ed.) Edinburgh: 1-105 

Watson, P. 1976. The protection of ram and bull spermatozoa by low density lipoprotein fraction of egg yolk during storage at 5°C and deep freezing. J. Therm. Biol. 1: 137-141.

Watson, P. F., Kunze, E., Cramer, P., Hammerstedt, R. H. 1992. A comparison of critical osmolality and hydraulic conductivity and its activation energy in fowl and bull spermatozoa. J. Androl. 13: 131-138.

Watson, P. F. 1995. Recent developments and concepts in the cryopreservation of spermatozoa and the assessment of their post thawing function. Reprod. Fertil. Dev. 7: 871-891.

Watson, P. F. 2000. The causes of reduced fertility with cryopreserved semen. Anim. Reprod. Sci. 60-61: 481-492.

Wei, L. Y. and Jea, Y. S. 2006. Conservation of water buffalo in Taiwan: cryopreservation of spermatozoa. International seminar on artificial reproduction biotechnologies for buffalo in Bogor, Indonesia. 108-113.

Wildeus, S. and Hammond, A. C. 1993. Testicular, semen and blood parameters in adapted and non adapted Bos taurus bulls in the semiarid tropics. Theriogenology. 40: 345-355.

Woelders, H. 1997. Fundamentals and recent development in cryopreservation of bull and boar semen. Vet. Quart. 19:135-138

Wolfe, D. W. 2001. Semen collection from bulls. Proceedings of the Society for Theriogenology and American College of Theriogenology Annual Conference. Vancouver, Canada, 12-15 September: 65-67.

Yates, J. H., Chandler, J. E., Canal, A. L., Braden Paul, J. 2003. The effect of nocturnal sampling on semen quality and the efficiency of collection in bovine species. Theriogenology. 60(9):1665-77.

Younis, M. 1996. Studies on semen quality, freezability and fertility of buffalo bulls during low and peak breeding seasons. PhD Thesis, Univ.Agri. Faisalabad, Pakistan.

Younis, M., Sarnad, H.A., Ahmad N. and Ahmad, I. 1999. Fertility of frozen-thawed semen collected from young, adult and old buffalo bulls during low and peak breeding seasons. Pakistan Vet. J. 19 (2): 78-80.

Younis, M., Samad, H.A., Ahmad, N. and Ahmad, I. 2003. Effects of  age  and season on the body weight, scrotal circumference and libido in Nili-Ravi buffalo bulls maintained at the semen production unit, Qadirabad. Pakistan veterinary journal. 23(2): 155-156.

Zafar, A. H., Ahmad, N., and Shah, S. K. 1988. Effect of seasonal variation on semen production of Nili-Ravi buffalo bulls. Buffalo J. 1: 61-68.

Zambelli, D. and Cunto, M. 2006. Semen collection in cats: techniques and analysis. Theriogenology. 66: 159-165.

Ziada, M. S., Adbel-Malak G., El-Sheltawi, M. and Ismail, T. I. M. 1995. Studies on frozen buffalo semen:  Effect of bulls,  diluents and thawing rates. Proc. 7th  Annual Congr. Egypt. Soc. Anim. Reprod. Fert: 265