A5046837290- Reproductive Physiology in Livestock
- Genetic and phenotypic traits in livestock
- Effects of Environmental Stressors on Livestock
- Ruminant Nutrition and Digestive Physiology
- Pharmacological Effects and Assays
- Animal Behavior and Welfare Studies
- Hypothalamic control of reproductive hormones
- Meat and Animal Product Quality
- Animal Nutrition and Physiology
- Rabbits: Nutrition, Reproduction, Health
- Plant Reproductive Biology
- Neuropeptides and Animal Physiology
- Regulation of Appetite and Obesity
- Receptor Mechanisms and Signaling
- Reproductive Biology and Fertility
- Respiratory Support and Mechanisms
- Neuroendocrine regulation and behavior
- Agricultural and Food Production Studies
- Agroforestry and silvopastoral systems
- Animal health and immunology
- Cardiovascular, Neuropeptides, and Oxidative Stress Research
- Advanced Scientific Research Methods
- Estrogen and related hormone effects
- Bee Products Chemical Analysis
- Veterinary Medicine and Surgery
Universidad Nacional Autónoma de México
2010-2022
Universidad de Cuautitlán Izcalli
2004
Fundación Ciencias Exactas y Naturales
1995
Michigan State University
1985-1990
Our objectives were to determine whether or not ovarian follicles contribute spontaneous luteal regression in heifers and, if so, when during diestrus do exert their effect. Thirty-one Holstein having displayed at least one estrous cycle (19 21 d) assigned, as available, randomized blocks for a factorial experiment. Reproductive organs exposed through midventral incision on d 9, 12 15 postestrus (estrus = 0). Visible electrocauterized and both ovaries x-irradiated (1,500 rads) treated...
Destruction of ovarian follicles during diestrus prolongs the lifespan corpora lutea in cows, but site(s) action is unclear. Thus, were destroyed 10 beifers (X-IRRAD) on Day 9 postestrus, while additional (SHAM) served as a control group. To investigate changes luteotropic support resulting from destruction follicles, pulses luteinizing hormone (LH) characterized Days 8, 13, and 15 postestrus. study interaction between products prostaglandin F2α (PGF2α) luteolysis, serum concentrations...
Rabies transmission by wild animals has not being controlled satisfactorily. One major rabies vector to humans and cattle is the hematophagus vampire bat Desmodus rotundus whose distribution still increasing in Americas. Of all of strategies currently place control this vector, none them are really specific some have ecological impacts. In present study we used a naturally occurring phytooestrogen on small colony. After collection, bats were fed bovine blood containing 200 μg coumestrol for...
Canine overpopulation continues to be a problem with serious public health implications, despite diversity of programs and strategies that have been implemented for its control. Coumestrol (COU) is an organic compound estrogenic activity, thus having the potential alter reproduction in mammals. COU commonly dissolved dimethyl sulfoxide (DMSO) before administration; however, evidence indicates DMSO not inert. The aim this study was assess effects either single oral administration diluted or...
PARA ESTABLECER FACTORES QUE INFLUYEN EN EL PESO AL NACIMIENTO (PN) A LOS 30 D Y 60 DIAS, SE UTILIZARON REGISTROS DE 917 CORDEROS COLUMBIA, PRODUCTO UN SISTEMA APAREAMIENTO ANUAL (S-A) CON PARTOS ABRIL UNO CADA OCHO MESES (S-I), ABRIL-MAYO (A-M), DICIEMBRE-ENERO (D-E) AGOSTO-SEPTIEMBRE (A-S), BAJO CONDICIONES PASTOREO INTENSIVO PRADERAS IRRIGADAS CLIMA TEMPLADO. DESDE 15 DISPUSIERON SUPLEMENTO. ANALISIS EFECTOS FIJOS INCLUYERON: EDAD LA MADRE, TIPO PARTO, SEXO DENTRO SISTEMA, EPOCA O ANO....
Concentrations of calcidiol, calcitriol, and minerals in blood serum colostrum 14 primiparous 16 multiparous Holstein dairy cows during short-period prepartum postpartum were determined compared. Blood samples collected between days 5 2 6 h, 12 7 21 postpartum. Nearly 66% 71% had subclinical hypocalcemia. Prepartum calcium (Ca) inorganic phosphorus (P) higher cows; Ca decreased both groups at h returned to baseline values Calcidiol calcitriol concentrations equal on day groups. In cows,...
Villagomez AME, Castillo RH, Villa-Godoy A, Roman PH, Vazquez PC. Tec Pecu Mex 2000;38(2)89-103. Sixteen heifers and 22 Indubrazil cows on pasture under controlled feeding management conditions were used to determine the effects of season reproduction. In Exp 1, a 2 x 4 factorial nested design was used; reproductive condition (RC; cow or heifer) (SS; Spring: SP, Summer: SU, Autumn: AU Winter: WI) main factors, dependent variables length estrous cycle (LEC), estrus (LE) number (NE). 2, used:...
Both growth and milk production in heifer calves are stimulated by a long photoperiod, though this has not been proven yet subtropical areas. To evaluate the effect of 16 hr light (L16) on suckling (LAC) and/or pre-pubertal stages (PP) area, 325 (36 ± 0.4 kg) were randomized into two groups: L16 or natural photoperiod (LNAT). At seven months age, 198 these (195 2 randomly assigned to LNAT. The following determined at beginning end LAC PP stages: Weight (PC, kg), height (AC, cm), thickness...
El objetivo fue evaluar la respuesta de LH, FSH y GH a kisspeptina-10 (KISS) en becerras prepúberes distintas edades, su asociación con IGF-I, E2 leptina circulantes. A 21 4, 7 11 meses edad se les aplicó una inyección i.v. 5 µg KISS/kg peso. En suero obtenido yugular (cada 15 min, 4 h pre hasta post-KISS) cuantificó GH. nueve muestras (tres seis determinó estradiol (E2). todas las aumentó LH post-KISS, un valor máximo (6.1±1.3a, 7.2±1.3a, 11.6+1.3b ng/ml) duración (64.3±20a, 92±20b,...
Se evaluó el efecto de la kisspeptina-10 (Kiss-10), administrada repetidamente, sobre liberación LH y actividad ovárica en becerras pre-púberes. Asimismo, se determinó asociación IGF-1 leptina séricas con dichos efectos. Catorce (14) Holstein o Suizo Pardo por Cebú (11.2±0.2 meses edad; 187.4±6.3 kg peso), asignaron aleatoriamente para recibir cada dos horas, durante tres días una aplicación i.v. Kiss-10 (Kisspeptina- 10; 5 μg/kg peso; n=7) solución salina fisiológica (Testigo, n=7). colectó...
<p>The objective was to evaluate the oxidative stress (OS) and its association with performance serum cortisol in dairy goats under induced (IL) natural lactation (NL). Six programmed be eliminated due reproductive problems were IL as follows: a) days 1-7, estradiol plus progesterone; b) 8-14, estradiol; c) 18-20, flumetasone; d) every seven bovine somatotropin; f) on day 21 milking began. Cortisol, antioxidant capacity Glutathione Peroxidase activity (GHS-Px) determined serum. During...
Calderon RRC, Villa-Godoy A, Lagunes LJ, Fajersson P. Tec Pecu Mex 2000,38(3)163-175. Ovarian follicular dynamics in peripuberal heifers were studied to determine the existence of 174 Rene Carlos Robles, Alejandro Villa-Godoy, Juvencio Lagunes, Pernilla growth waves (FGW) Brown Swiss (BS) and Zebu (ZE) heifers. Seventeen ZE 8 BS used a split plot design. Half housed individual pens remainder located on pasture. All fed gain 0.5 kg/d. From 195 kg body weight, blood sampling ultrasound...