A5007291133- Reproductive Biology and Fertility
- Sperm and Testicular Function
- Reproductive Physiology in Livestock
- Ovarian function and disorders
- Reproductive biology and impacts on aquatic species
- Animal Genetics and Reproduction
- Seed Germination and Physiology
- Bee Products Chemical Analysis
- Marine animal studies overview
- Genetic and phenotypic traits in livestock
- Livestock and Poultry Management
- Effects of Environmental Stressors on Livestock
- Avian ecology and behavior
- Agricultural and Food Production Studies
- Hormonal and reproductive studies
- Animal Nutrition and Physiology
- Geography and Environmental Studies in Latin America
- Livestock Farming and Management
- Magnetic and Electromagnetic Effects
- Marine and coastal plant biology
- Insect and Pesticide Research
- Agricultural and Rural Development Research
- Rabbits: Nutrition, Reproduction, Health
- Parasite Biology and Host Interactions
- Plant and soil sciences
University of Cuenca
2017-2025
Universidad de Murcia
2025
Universidad Católica de Cuenca
2021-2022
Delphinus Medical Technologies (United States)
2022
Instituto de Investigaciones Agropecuarias
2021
Medico
2019
This study evaluated the effects of serum (egpS) and follicular fluid (egpFF) from estrus guinea pigs as in vitro maturation (IVM) supplements for natural cycle pig oocytes. Two experiments were conducted: first assessed three IVM media, a commercial medium (CMOM) two homemade media (HMOM-P HMOM-S), oocyte using 615 bovine oocytes, while second incorporation 5%, 10%, 20% egpFF or egpS into 1744 Initially, we optimized base oocytes to determine most suitable culture conditions. The results...
A twenty-five year old dataset of parasites in long-beaked and short-beaked common dolphins (Delphinus spp.), using fisheries as an opportunistic platform access, registered seven species helminths one epizoite, being a unique for the Southeast Pacific. Sampling was conducted 1985-2000 at six fishing ports Peru Ecuador where cetaceans were landed from interactions with small-scale fisheries. From total 473 examined, we identified including three Trematoda: Nasitrema globicephalae, Pholeter...
El objetivo fue caracterizar el patrón de comportamiento la dinámica folicular en vaquillas Criollas (CR) al pastoreo sierra alta del Ecuador. Se realizó granja experimental Irquis Universidad Cuenca, año 2016. peso promedio 243,3±45,0 kg. Condición corporal (CC) 2,5±0,4, escala 1-5 puntos. Edad 19,9±4,8 meses. realizaron ecografías diarias durante un ciclo estral. Cada 48h se determinó los niveles Progesterona (P4). estableció dos y tres ondas foliculares (44,4 55,6%, respectivamente)....
Data on helminth parasites and epizoites is presented for the long-beaked short-beaked common dolphins from Southeast Pacific. Sampling in 1985-2000 was conducted mainly at six fishing ports Peru Ecuador where cetaceans were landed. From a total of 473 sampled, we identified helminths including three species Trematoda: Nasitrema globicephalae, Pholeter gastrophilus Braunina cordiformis; Nematoda, which includes Anisakis spp., Crassicauda sp. Halocercus sp.; two cestodes Tetrabothrius...
Abstract We evaluated the relationship between plasma levels of anti-Müllerian hormone (AMH) and number antral follicles at restart follicular wave in crossbred Holstein cows reared under extensive grazing systems over 2500 m above sea level. The study included 140 from 15 farms that were average 75.3 ± 2.10 d post partum. Animals synchronized according to following regime: day 0 = intravaginal progesterone releasing device (IPD) + estradiol benzoate (EB); 7: withdrawal IPD prostaglandin; 8:...
El objetivo del presente estudio fue valorar la prueba azul brillante de cresilo (BCB) como método indirecto para seleccionar ovocitos competentes producción in vitro embriones (PIV). Los complejos cúmulos-ovocitos (COC) fueron obtenidos dos vaquillas criollas sometidas a tratamientos: T1 = COC recuperados por OPU (ovum pick-up) previa estimulación con FSH-LH; T2 sin donante (testigo). Las alternadas en los tratamientos y se hicieron cinco repeticiones. clasificados tipos A, B, C D. Luego...
El objetivo del estudio fue evaluar los efectos tratamiento con gonadotropina y el intervalo entre la estimulación ovárica FSH/LH sesión de aspiración folicular, sobre cantidad calidad complejos cúmulus ovocitos (COCs) obtenidos por ovum pick up (OPU) en vaquillas criollas ecuatorianas. Cuatro novillas fueron asignadas aleatoriamente a cuatro grupos (FHS/LH 40h; 48h; control 48h). En dos se aplicó una dosis (0.011 mg, IM) GnRH día 0, seguida 500 UI, IM, 2, OPU 40 (FSH/LH h) o 48 horas 48h)...
Resveratrol (RES) is a potent antioxidant known for its ability to scavenger free radical, thereby reducing reactive oxygen species (ROS) generation and lipid peroxidation. The study investigated the impact of resveratrol on cryopreserved bull sperm using conventional slow (CS) ultrarapid (UR) freezing methods. Twenty-four ejaculates from four bulls were divided into groups based method RES supplementation: CS-RES (n = 80), CS-Co UR-RES 24), UR-Co 24). CS involved exposing straws with...
El experimento tuvo dos fases, la primera determinó relación entre el recuento de folículos antrales (RFA) y concentración hormona anti-mülleriana (AMH) valorada día reinicio onda folicular en 61 vaquillas Holstein mestizas, criadas ganaderías del trópico alto Ecuador. La segunda fase comparó RFA valorado aspiración ecoguiada (OPU); así como, cantidad calidad los complejos cumulus ovocito (COCs) recuperados animales con alta (n=8) baja AMH. sincronización se realizó benzoato estradiol más un...
Glycerol (Gly) is the cryoprotective agent (CPA) most widely used to cryopreserve rooster semen. However, its cryoprotection, toxicity, and efficacy may vary in different breeds of roosters (e.g.,fighting rooster). In this sense, investigation evaluated effect concentrations Gly added Lake-Ravie extender on kinetic variables plasma membrane integrity (PMI, equivalent viability) spermatozoa. A total 42 semen ejaculates from 6 Spanish fighting (collected 7 weekly sessions) by dorsal massage...
Implementing alternatives methods to dorsal massage (e.g., electroejaculation) for recovering semen from fighting rooster, known be very stressful due its aggressiveness, has become a priority breeders of this cock breed in Ecuador. Therefore, the objective present study was evaluate two collection techniques roosters, one by electroejaculation (EE) and another (DM) on seminal quality parameters. For purpose, thirty attempts recovery six adult Spanish roosters were carried out using DM (n =...
This study aimed to assess the suitability of egg yolk (EY) supplementation a tris–citric acid–based extender on cryosurvival guinea pig (Cavia porcellus) epididymal spermatozoa. Two synthetic-based extenders, acid–glucose plus 20% EY (TCG-EY) and acid–fructose (TCF) both with 5% glycerol, were compared. Thirty-two epididymides recovered from 16 adult males by gonadectomy, then sperm samples retrieved retrograde flushing using TCG-EY TCF extenders for left or right epididymis, respectively....
Reproduction, Fertility and Development is an international journal publishing original research , review comment in the fields of reproduction developmental biology humans, domestic animals wildlife
The objective of this research was to investigate the diagnostic accuracy post-mortem ultrasound in antral follicle count (AFC) determination and compare it with visual AFC grazing crossbred Holstein cows, at high altitude Ecuador. Pre-mortem blood from 80 cows collected, ovarian characteristics were analysed by techniques. counts stratified as high, medium or low terciles. Mean AMH concentration pre-mortem 280.1 ± 15.53 pg/mL. obtained inspection (26.9 9.49 follicles) 23.8% higher than...