Study of male effect on feeding and estrus behavior of Afshari ewes
This study was conducted to evaluate the male effect on the manifestation of estrus and feeding behavior of Afshari ewes during their breeding season. The study consists of 48 Afshari ewes, 3 years old, 67 ± 2 kg live weight, body condition score 3, along with 10 Afshari rams. The study was for a period of 6 weeks in a complementary randomized design. Ewes were equally divided into three treatments (T1, T2, and T3) along with a control (T4) with six animals in each group. Variable factors of treatments was the distance of the ram box (from the ewes), which was determined to be the T1 (0–5 m), T2 (10–15 m), and T3 (25–30 m). Exposure of the ewes to the rams resulted in an earlier manifestation of estrus signs (p < 0.05). Moreover, the total recorded estrus signs were significantly affected by the distance from the rams (p < 0.05). The result of this study showed differences in feed intake of the ewes due to the distance from the rams (p < 0.05). In the other words, the distance of the ewes from the rams significantly affected feed intake of the Afshari ewes.
KeywordsAfshari ewe Feed intake Male effect Estrus
- Bedos, M., Flores, JA. Fitz-Rodríguez, G., Keller M., Malpaux, B., Poindron, P. and Delgadillo, J.A., 2010. Four hours of daily contact with sexually active males is sufficient to induce fertile ovulation in anestrous goats. Horm Behav 58: 473–477.Google Scholar
- Dwyer, C., 2009. The behaviour of sheep and goats. In: P. Jensen (Ed.) the Ethology of Domestic Animals. An Introductory Text. Second ed. CAB International, Wallingford, UK; pp. 161–176.Google Scholar
- Forbes JM, 2007. Voluntary food intake and diet selection in farm animals. 2nd Ed. (CABI; Second edition (August 2007)) Wallingford, Oxfordshire, UK.Google Scholar
- Hafez, E.S.E., Hafez, B., 2000. Reproduction in farm animals” 7th edition, (Wiley, John & Sons, Incorporated), Philadelphia, Pennsylvania, USA.Google Scholar
- Hawken, P.A. and Martin, G.B., 2012. Sociosexual stimuli and gonadotropin-releasing hormone/luteinizing hormone secretion in sheep and goats. Domest Anim Endocrinol. 43(2):85–94.Google Scholar
- Metz, J. and Wierenga, H., 1997. Behavioral Criteria for the Design of Housing Systems for Cattle. Cattle Housing Systems, Lameness and Behavior, (Martinus Nijhoff Publishers, Boston, MA, USA).Google Scholar
- Mohamadi, W., Daghigh KIA, H., Hossein Khani, A. and Alijani, S., 2011. Effect of Male Goat Pheromone on Feeding Behavior of Female Markhoz Goat in Breeding Season. Pak Vet J, 2011, 31(4): 327–330.Google Scholar
- SAS Institute Inc. 2003. SAS Users Guide. SAS Institute Inc., Cary, NC.Google Scholar
- Schmidt, G.H., Van Vleck, L.D. and Hutjens, M.F., 1988. 2nd Ed, Prentice Hall, Principles of Dairy Science, Texas, USA, pp. 466, (Prentice Hall; 2 Sub edition (March 1988)).Google Scholar
- Warren, G., 2004. Applied Sheep Behavior. Animal Science Department the University of Tennessee, (Agriculture Extension service, University of Tennessee), Available online: http://animalscience.ag.utk.edu.