Influence of male on estrus behavior, estradiol and progesterone release and puberty onset on prepubertal Saanen goats

Laurinda Augusto, Alice Deleo Rodrigues, Giovana Krempel Fonseca Merighe, Sandra Aparecida de Oliveira, Gabriela Facholi Bomfim, João Alberto Negrão


The present study investigated the male effect on the estrus behaviors, estradiol and progesterone release in prepubertal Saanen goats. Twenty-nine female Saanen goats at 135 ± 10 days old with body weight of 22.8 ± 3.3 Kg were randomly assigned to three treatments: exposure to sexually active male (male treatment), exposure to androgenized females (androgenized female treatment), and prepubertal goats isolated from active male and androgenized females (control treatment). Sexual behaviors associated with estrus were recorded daily, and blood samples were taken weekly to determine estradiol and progesterone concentrations over 24 weeks. The experimental goats subjected to male or androgenized female had significantly higher frequency of estrus (mount acceptance) (P ? 0,02), progesterone (P ? 0,01), and estradiol (P ? 0,01) release than the control goats. Furthermore, goats exposed to a male showed estrus behavior two weeks earlier and maintained this estrus behavior for three weeks more than goats of both female and control treatments. Estrus was observed in 70 % of goats in male and female treatments during the breeding season versus 44 % of the control goats. Finally, significantly more goats subjected to male treatment (60 % of goats) showed progesterone concentrations higher than 1 ng mL-1 (which indicates the presence of a functional corpus luteum) compared to the female and control treatment (40 and 22 % of goats, respectively). These results shows that male treatment significantly increased the number of females showing estrus behavior, estradiol and progesterone release, and the number of animals with a functional corpus luteum, anticipating puberty for experimental goats, suggesting that the male effect could be used to anticipate the onset of puberty in goats.


Male effec; Hormone; Corpus luteum; Goats.

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Bedos, M., Duarte, G., Flores, J. A., Fitz-Rodriguez, G., Hernandez, H., Vielma, J.,… Delgadillo, J. A. (2014). Two or 24 h of daily contact with sexually active males results in different profiles of LH secretion that both lead to ovulation in anestrous goats. Domestic Animal Endocrinology, 48, 93-99. doi: 10.1016/j.domaniend.2014.02.003

Bedos, M., Velazquez, H., Fitz-Rodriguez, G., Flores, J. A., Hernandez, H., Duarte, G.,… Delgadillo, J. A. (2012). Sexually active bucks are able to stimulate three successive groups of females per day with a 4-hour period of contact. Physiology & Behavior, 106(2), 259-263. doi: 10.1016/j.physbeh.2012.02.015

Blaszczyk, B., Udala, J., & Gaczarzewicz, D. (2004). Changes in estradiol, progesterone, melatonin, prolactin and thyroxine concentrations in blood plasma of goats following induced oestrous in and outside the natural breeding season. Small Ruminant Research, 51(3), 209-219. doi: 10.1016/S0921-4488(03)00190-1

Chemineau, P., Pellicer-Rubio, M. T., Lassoued, N., Khaldi, G., & Monniaux, D. (2006). Male-induced short oestrous and ovarian cycles in sheep and goats: a working hypothesis. Reproduction Nutrition Development, 46(4), 417-429. doi: 10.1051/rnd:2006022

Chemineau, P., Daveau, A., Maurice, F., & Delgadillo, J. A. (1992). Seasonality of estrus and ovulation is not modified by subjecting female alpine goats to a tropical photoperiod. Small Ruminant Research, 8(4), 299-312. doi: 10.1016/0921-4488(92)90211-L

Cruz, J. F., Rondina, D., & Freitas, V. J. F. (2005). Ovarian follicular dynamics during anestrus in Anglo-Nubian and Saanen goats raised in tropical climate. Tropical Animal Health and Production, 37(5), 395-402. doi: 10.1007/s11250-005-4166-6

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(1), 74-81. doi: 10.1017/S1751731110001400

Delgadillo, J. A., Vielma, J., Hernandez, H., Flores, J. A., Duarte, G., Fernandez, I. G.,... Gelez, H. (2012). Male goat vocalizations stimulate the estrous behavior and LH secretion in anestrous goats that have been previously exposed to bucks. Hormones and Behavior, 62, 525-530. doi: 10.1016/j.yhbeh.2012.08.014

Duarte, G., Flores, J. A., Malpaux, B., & Delgadillo, J. A. (2008). Reproductive seasonality in female goats adapted to a subtropical environment persists independently of food availability. Domestic Animal Endocrinology, 35(4), 362-370. doi: 10.1016/j.domaniend.2008.07.005

Ebling, F. J. P. (2005). The neuroendocrine timing of puberty. Reproduction, 129, 675-683. doi: 10.1530/rep.1.00367

Evans, A. C. O., & O'doherty, J. V. (2001). Endocrine changes and management factors affecting puberty in gilts. Livestock Production Science, 68(1), 1-12. doi: 10.1016/S0301-6226(00)00202-5

Fabre-Nys, C., & Gelez, H. (2007). Sexual behavior in ewes and other domestic ruminants. Hormones and Behavior, 52(1), 18-25. doi: 10.1016/j.yhbeh.2007.04.001

Fatet, A., Pellicer-Rubio, M. T., & Leboeuf, B. (2011). Reproductive cycle of goats. Animal Reproduction Science, 124(3-4), 211-219. doi: 10.1016/j.anireprosci.2010.08.029

Fiol, C., Quintans, G., & Ungerfeld, R. (2010). Response to biostimulation in peri-puberal beef heifers: influence of male-female proximity and heifer's initial body weight. Theriogenology, 74(4), 569-575. doi: 10.1016/j.theriogenology.2010.03.015

Flanagan, K. A., Webb, W., & Stowers, L. (2011). Analysis of male pheromones that accelerate female reproductive organ development. Plos One, 6(2), 1-17. doi: 10.1371/journal.pone.0016660

Foster, D. L., Jackson, L. M., & Padmanabhan, V. (2006). Programming of GnRH feedback controls timing puberty and adult reproductive activity. Molecular and Cellular Endocrinology, 254/255, 109-119. doi: 10.1016/j.mce.2006.04.004

Katz, L. S. (2007). Sexual behavior of domesticated ruminants. Hormones and Behavior, 52(1), 56-63. doi: 10.1016/j.yhbeh.2007.03.012

Martinez-Alfaro, J. C., Hernandez, H., Flores, J. A., Duarte, G., Fitz-Rodriguez, G., Fernandez, I. G.,… Delgadillo, J. A. (2014). Importance of intense male sexual behavior for inducing the preovulatory LH surge and ovulation in seasonally anovulatory female goats. Theriogenology, 82(7), 1028-1035. doi: 10.1016/j.theriogenology. 2014.07.024

Mellado, M., & Hernandez, J. R. (1996). Ability of androgenized goat wethers and does to induce estrus in goats under extensive conditions during anestrus and breeding seasons. Small Ruminant Research, 23(1), 37-42. doi: 10.1016/S0921-4488(96)00897-8

Menchaca, A., & Rubianes, E. (2001).Effect of high progesterone concentrations during the early luteal phase on the length of the ovulatory cycle of goats. Animal Reproduction Science, 68(1-2), 69-76. doi: 10.1016/S0378-4320(01)00139-7

National Research Council (2007). Nutrients requirements of small ruminant: sheep, goats, cervids and new world camelids. Washington, D.C: National Academy Press.

Nogueira, D. M., Cavalieri, J., Gummow, B., & Parker, A. J. (2015). Comparison of follicular dynamics and hormone profiles in Boer goats examined during the breeding and non-breeding seasons in the tropics of Queensland, Australia. Small Ruminant Research, 125, 93-100. doi: 10.1016/j.smallrumres.2015.02.014

Ponce, J. L., Hernandez, H., Flores, J. A., Matthieu, K., Chemineau, P., & Delgadillo, J. A. (2015). One day of contact with photostimulated bucks is sufficient to induce ovulation in seasonally anestrous goats. Theriogenology, 84(6), 880-886. doi: 10.1016/j.theriogenology.2015.05.019

Ramirez, S., Bedos, M., Chasles, M., Hernández, H., Flores, J.A., Vielma, J.,… Delgadillo, J. A. (2017). Fifteen minutes of daily contact with sexually active male induces ovulation but delays its timing in seasonally anestrous goats. Theriogenology, 87, 148-153. doi: 10.1016/j.theriogenology.2016.08.019

Scaramuzzi, R. J., & Martin, G. B. (2008).The importance of interactions among nutrition, seasonality and socio-sexual factors in the development of hormone-free methods for controlling fertility. Reproduction in Domestic Animals, 43(Suppl. 2), 129-136. doi: 10.1111/j.1439-0531.2008.01152.x

Statistical Analysis System Institute (2008). SAS Institute. SAS/STAT 9.2 User’s Guide. Cary: SAS Institute Inc.

Valasi, I., Chadio, S., Fthenakis, G. C., & Amiridis, G. S. (2012). Management of pre-pubertal small ruminants: Physiological basis and clinical approach. Animal Reproduction Science, 130(3-4), 126-134. doi: 10.1016/j.anireprosci.2012.01.005


Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional