Search Results - "Ungerfeld, R."

Administration of a single dose of long-acting injectable progesterone formulation reduces the stress response to weaning in anestrous ewes by Ungerfeld, R., Freitas-de-Melo, A.

“…•Ewes treated with a single dose of long-acting progesterone returned to their basal normal behavior earlier after weaning.•These ewes paced less times the day…”
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Combination of the ram effect with PGF2α estrous synchronization treatments in ewes during the breeding season by Ungerfeld, R

“…The role of the ram effect on the reproductive performance of ewes that have initiated estrous cycles following lambing in combination with synchronization of…”
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Frequent social regroupings affect corporal and reproductive development, metabolic status, and behavioral time budget in dairy heifers by Moratorio, M., Carriquiry, M., Ungerfeld, R., Fiol, C.

“…We aimed to evaluate the corporal and reproductive development, metabolic status, and behavioral patterns of resident dairy heifers subjected to social…”
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Chronic use of a GnRH agonist (deslorelin) or immunization against GnRH: effects on testicular function and sperm quality of bucks by Giriboni, J., Lacuesta, L., Santiago-Moreno, J., Ungerfeld, R.

“…Chronic use of GnRH agonists and immunization against GnRH have been used as reversible contraceptive methods. The aim of this study was to compare the…”
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Social rank affects the endocrine response to frequent regroupings in grazing dairy heifers by Fiol, C., Moratorio, M., Carriquiry, M., Ungerfeld, R.

“…[Display omitted] •Social regroupings triggered the display of agonistic interactions.•The number of agonistic interactions decreased and stabilized after the…”
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Positive effects of biostimulation on luteinizing hormone concentration and follicular development in anestrous beef heifers by Fiol, C, Ungerfeld, R

“…The objectives of this study were to characterize the LH secretion pattern and the follicular development of anestrous beef heifers during early exposure…”
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Social dominance in prepubertal dairy heifers allocated in continuous competitive dyads: Effects on body growth, metabolic status, and reproductive development by Fiol, C, Carriquiry, M, Ungerfeld, R

“…The objective of this study was to compare the body weight (BW) and size, metabolic status, and reproductive development of dominant and subordinate…”
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Daily variation of the cortisol and insulin concentration, glycemia, surface temperature, and behavior patterns due the administration of equine Chorionic Gonadotropin in rams by Pinto-Santini, L., Pérez-Clariget, R., Ungerfeld, R.

“…Sex steroids can modulate the circadian rhythmicity of some physiological and behavioral functions of sheep. During the non-breeding season, Corriedale rams…”
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Evidence of cooperative calves’ care and providers’ characteristics in zebu cattle (Bos indicus) raised under extensive conditions by Orihuela, A., Pérez-Torres, L. I., Ungerfeld, R.

“…Communal rearing has been reported in several mammals, including wild ungulates. However, until now, there was no evidence of any alloparental care in the Bos…”
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Social dominance affects intake rate and behavioral time budget in pre-pubertal dairy heifers allocated in continuous competitive situations by Fiol, C., Aguerre, M., Carriquiry, M., Ungerfeld, R.

“…In intensive feeding systems, competition may be high and social dominance may affect animal performance by changing dry matter intake (DMI) and behavioral…”
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A single administration of carbetocin before electroejaculation increases the insemination doses produced from each ejaculate in rams by Orihuela, J.C., Freitas-de-Melo, A., Pinto-Santini, L., Giriboni, J., Viera, M.N., Santiago-Moreno, J., Beracochea, F., Silveira, P., Ungerfeld, R.

“…The aim of the study was to determine the effect of carbetocin administration (a long-acting analog of oxytocin) 20 or 10 min before electroejaculation (EE) on…”
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Does the metabolic and behavior daily variation pattern on rams differ in summer and winter? by Pinto-Santini, L, Pérez-Clariget, R, Ungerfeld, R

“…This study aimed to compare the daily variation pattern of testosterone, cortisol, insulin, total blood protein, albumin concentration, glycemia, activity…”
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Competition Between Different Social Ranked Rams has Similar Effects on Testosterone and Sexual Behaviour Throughout the Year by Ungerfeld, R, Lacuesta, L

“…Dominant rams have preferential access to females, as they frequently interrupt sexual behaviour from subordinated. Testosterone concentrations are directly…”
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Sedation or anaesthesia decrease the stress response to electroejaculation and improve the quality of the collected semen in goat bucks by Abril-Sánchez, S., Crosignani, N., Freitas-de-Melo, A., Terrazas, A., Damián, J. P., Beracochea, F., Silveira, P., Ungerfeld, R.

“…Electroejaculation (EE) is stressful and probably painful; thus the administration of anaesthesia is recommended to decrease those negative effects. However,…”
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Permanent contact with females increases testosterone and improves fresh semen traits in pampas deer (Ozotoceros bezoarticus) males by Villagrán, M., Ungerfeld, R.

“…Socio-sexual signals can stimulate neuroendocrinal control of reproduction. The aim of this work was to test the hypothesis that permanent and close contact…”
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Short- and long-term effects of temporary early cow–calf separation or restricted suckling on well-being and performance in zebu cattle by Pérez-Torres, L., Ortiz, P., Martínez, J.F., Orihuela, A., Rubio, I., Corro, M., Galina, C.S., Ungerfeld, R.

“…Information on weaning techniques in the tropics is scarce, particularly regarding the long-term effect of temporary early cow–calf separation or restricted…”
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The induction of oestrus in ewes during the non-breeding season using pre-used CIDRs and oestradiol-17β treatment by Ungerfeld, R.

“…The fertility obtained in sheep after the use of intravaginal progesterone devices is related to the content of progesterone of the device. The hypothesis of…”
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Acoustic characteristics of vocalisations emitted by the domestic rabbit (Oryctolagus cuniculus) during copula ejaculation and electro-ejaculation with or without anaesthesia by A. Orihuela, R. Ungerfeld

“…Vocalisations can be used as reliable indicators of pain, but little information is available in rabbits, where acoustic tools for farming environments can be…”
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Intravaginal sponges to synchronize estrus decrease sexual attractiveness in ewes by Gatti, M, Ungerfeld, R

“…Vaginal secretions are an important source of chemical signals, which affect ewes' attractiveness. Moreover, alterations of vaginal flora reduce sexual…”
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Minimizing cows’ stress when calves were early weaned using the two-step method with nose flaps by Ungerfeld, R., Quintans, G., Hötzel, M. J.

“…Early weaning may be used in beef cattle production to improve reproduction rates in range conditions. However, weaning causes a stress response in cows, which…”
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