The objective was to test the efficacy of an intravaginal progesterone insert and injection PGF2α for synchronizing estrus shortening interval pregnancy in cattle. Cattle were assigned one three treatments before a 31-d breeding period that employed artificial insemination. Control cattle not treated, treated administered or progesterone-releasing (CIDR) 7 d with on 6. applied experiments involved postpartum beef cows (Exp. 1; n = 851; 56±0.6 postpartum), heifers 2; 724; 442.5±2.8 age),...

The objective of this study was to evaluate the effects acclimation handling on growth, plasma concentrations progesterone (P4) and cortisol, temperament, reproductive performance Brahman-crossbred heifers. Over 2 consecutive years, 37 Braford 43 Brahman x Angus heifers were initially evaluated, within 30 d after weaning, for BW puberty status via transrectal ultrasonography P4 (d 0 10), temperament by measurements chute score, pen exit velocity 10 only). On 11, stratified breed, status, BW,...

The effect of three rates gain on carcass composition, lipid partitioning, age and BW at puberty, concentrations growth hormone (GH), IGF-I, insulin, glucose, NEFA in plasma were evaluated 38 Angus x Hereford heifers. Heifers allotted by to treatments with a replication each 2 yr: full-fed (n = 13; FF) 1.36 kg/d; limit-fed 12; LF) .68 maintenance-full-fed MFF) .23 kg/d for 16 wk, then kg/d. slaughtered within 10 d after the onset puberty. At slaughter, kidney, pelvic, heart fat (KPH) udder...

Early porcine conceptus development is characterized by rapid trophoblastic elongation between Days 11 and 12 of pregnancy, a period embryonic loss in the pig. Growth factors steroids secreted uterus, as well ligand receptors produced conceptus, are thought to regulate elongation. Therefore, objectives this study were characterize gene expression for steroidogenic enzymes 17α-hydroxylase aromatase mesodermal marker brachyury, fibronectin (integrin β-1), progesterone, estrogen, oxytocin,...

Early conceptus development (Days 10-12) in the pig is characterized by rapid remodeling and elongation of trophoblastic membrane. Endometrial synthesis secretion retinol-binding protein (RBP; transporter retinol) into uterine lumen parallels morphological transformation conceptus. Hence, retinoic acid, a powerful morphogen, may serve critical function through various isoforms acid receptor (RAR). We hypothesize that transcripts for RAR will be expressed, possibly differentially, early...

Inclusion of Bos indicus genetics improves production traits cattle maintained in hot climates. Limited information exists detailing pregnancy-specific events as influenced by variable amounts genetics. Three experiments were completed to examine the effect taurus and genotypes on fetal size plasma pregnancy-associated glycoprotein (PAG) concentrations. In all experiments, cows bred AI after synchronization ovulation. Fetal measurements transrectal ultrasonography PAG concentrations...

Vitamin D is critical for the growth and development of calves positively contributes to immune function cattle. Serum 25-hydroxyvitamin (25(OH)D) concentrations above 20 ng/mL have traditionally been considered adequate cattle, but recent evidence has indicated that below 30 are insufficient immunity. Because little information available regarding vitamin status beef objective this study was evaluate cow-calf herds on pasture as affected by season location. samples were collected from 43...

The objective of this experiment was to examine the effect castration technique on daily feed intake (DFI), water (DWI), growth performance, residual (RFI), and inflammatory response in weaned beef calves. Seventy-five calves (214 ± 3.2 kg; 200 26 d age) were housed a GrowSafe 4000 facility 7 post weaning (15 calves/pen). Calves offered total mixed ration (TDN = 67.3% CP 12.2%, DM 89%) for ad libitum consumption. On 0, assigned 1 5 treatments (n 15 calves/treatment): 1) steers castrated...

These studies were performed to test the hypotheses that: 1) endometrial responsiveness oxytocin (OT) in pig endometrium is associated with changes OT receptor (OTr) population density resulting from corresponding regulation of OTr gene transcription, 2) controlled solely through a mechanism involving density, and 3) differ between diestrus early pregnancy pigs. In experiment 1, dissociation constant (Kd) cyclic pigs on Days 10-16 but increased (p < 0.05) 10 12 before– decreasing Day 16....

Postpartum and lactating crossbred cows containing a percentage of Bos indicus breeding at three locations were studied to determine the efficacy GnRH + PGF2alpha combinations for synchronization estrus and(or) ovulation. Cows equally distributed each treatments by body condition score start experiment (d 0). All received 100 microg on d 0 25 mg 7 later. The insemination protocols included 1) AI 12 h after exhibiting during (Select-Synch; n = 197); 2) timed-AI 9 (CO-Synch; 193); 3) 10...

Crossbred Brahman heifers (n = 60) were studied to determine the effect of a 7-d intravaginal progesterone-releasing insert (INSERT) in combination with PG (Lutalyse; 25 mg i.m.) and estradiol benzoate (EB; .5 on time ovulation estrous behavior. In Phase I, at unknown stages cycle assigned by BW body condition score one three treatments d 0: 1) INSERT for 7 (CONTROL; n 10); 2) d, 7, EB 24 h after removal (EB24; or 3) 48 (EB48; 10). Blood samples collected every 8 removal. Also, blood...

In pigs, changes in an unidentified endometrial glycoprotein, pGP30, are temporally associated with rapid trophoblast elongation and initial placental attachment on day 12 of gestation. Identification pGP30 was undertaken through protein purification, NH2-terminal amino acid sequencing cDNA products generated reverse transcription–polymerase chain reaction. Sequencing 35 acids from the end revealed that 30 kDa glycoprotein is a cleavage product C-terminal region inter-α-trypsin inhibitor...

Experiments were conducted to test the hypothesis that estrogen treatment will regress a persistent dominant follicle developed during melengestrol acetate (MGA) in absence of functional corpus luteum (CL) with normal fertility following development and ovulation newly recruited follicle. In Exp. 1, nonlactating beef cows (n = 31) administered .5 mg.cow-1.d-1 MGA (d 0) for 14 d 25 mg prostaglandin F2 alpha (PGF2 alpha) on 6 8 CL. On 11 treatment, approximately half MGA-treated received 5...

Nonlactating Bos indicus x taurus cows were used in three herds to determine the efficacy of different PGF2alpha treatments combination with GnRH and melengestrol acetate (MGA) for a timed artificial insemination protocol. The start experiment was designated as d 0, at which time assigned body condition score received 100 microg GnRH. Cows fed MGA (0.5 mg cow(-1) d(-1)) on 1 7. On 7, either single injection (Lutalyse sterile solution; 25 mg; n = 297), cloprostenol sodium (Estrumate; 500...

Management of livestock grazing in riparian areas is an important aspect rangeland management. Willows (Salix spp.) are a common plant serving as ecosystem stabilizer, well providing habitat, but browsing or trampling by cattle can decrease willow canopy volume. Canopy volume be measured on the ground with hours meticulous data collection. However, estimates from drone-collected images could more efficient and objective method for measuring understanding impact use woody vegetation. Our was...

AN241, a 4-page fact sheet by Megan Thomas, Matt Hersom, Todd Thrift, and Joel Yelich, describes this by-product of the beer-brewing industry — feed characteristics, considerations for use, feeding guidelines. Includes references. Published UF Department Animal Sciences, May 2010. AN241/AN241: Wet Brewers' Grains Beef Cattle (ufl.edu)