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Full-Text Articles in Life Sciences
Bedding Application And Increasing Dosage Of Trenbolone Acetate And Estradiol In Implants For Beef Steers: Influence On Growth Performance, Carcass Characteristics, And Circulating Metabolite Responses, Dathan T. Smerchek
Electronic Theses and Dissertations
Three randomized complete block design feedlot experiments were conducted over the course of two years. Two experiments were conducted to investigate the effect of bedding use in confined beef steers. The third experiment evaluated the effects of implants containing increasing doses of trenbolone acetate (TBA) and estradiol benzoate (EB) in confined beef steers. Experiment 1 used Simmental × Angus steers (n = 240; initial body weight (BW) = 365 ± 22.5 kg). Experiment 2 used newly weaned Charolais × Red Angus steers (n = 162; initial BW = 278 ± 13.4 kg). Steers were allotted to 1 of 2 treatments: …
Characterization And Effects Of Systemic And Ovarian Gnrh In Beef Cattle, Jerica J. J. Rich
Characterization And Effects Of Systemic And Ovarian Gnrh In Beef Cattle, Jerica J. J. Rich
Electronic Theses and Dissertations
Previous studies evaluating single and multiple GnRH injections at time of CIDR removal/prostaglandin injection using the 7-day CO-Synch + CIDR protocol have reported decreased interval to estrus and increased expression of estrus, or increased conception rates, respectively. Thus, the objective of experiment 1 (Chapter 3) was to compare the effects of supplementing GnRH at prostaglandin injection on expression of estrus and conception rates in beef cows and heifers synchronized with different protocols. The objective was conducted in two parts, in study 1, Beef cows (n = 161) and heifers (n = 1803) from 16 herds over three years were synchronized …
The Influence Of Preovulatory Estradiol On Uterine Transcriptomics And Proteomics Around Maternal Recognition Of Pregnancy In Beef Cattle, Emmalee J. Northrop
The Influence Of Preovulatory Estradiol On Uterine Transcriptomics And Proteomics Around Maternal Recognition Of Pregnancy In Beef Cattle, Emmalee J. Northrop
Electronic Theses and Dissertations
Preovulatory estradiol has been reported to play a crucial role in pregnancy establishment and maintenance, but the mechanism by which estradiol exerts its effects has not been well characterized. Specifically, the interactions between the maternal uterine environment and the developing conceptus can greatly impact pregnancy success or loss. The objective of this dissertation is to determine the effects of preovulatory estradiol exposure on uterine and trophectoderm transcriptomes, and uterine luminal fluid (ULF) protein composition. Beef cows/heifers were synchronized, artificially inseminated (d 0), and grouped into either high (highE2) or low (lowE2) preovulatory estradiol. Uteri were flushed to collect d16 conceptuses …
Effect Of Single Vs. Pulsing Doses Of Estradiol 17-Β And Trenbolone Acetate In Finishing Steers Fed A High Concentrate Diet, Sandi L. Parr, Robbi H. Pritchard, Kelly W. Bruns
Effect Of Single Vs. Pulsing Doses Of Estradiol 17-Β And Trenbolone Acetate In Finishing Steers Fed A High Concentrate Diet, Sandi L. Parr, Robbi H. Pritchard, Kelly W. Bruns
South Dakota Beef Report, 2006
The effect of implant dosing pattern on anabolic response was evaluated in predominately Angus steers (n=192). Steers, except the control, were implanted with 1 of 3 different implant strategies. Cumulatively all implant treatments received a dose of 24 mg estradiol 17-β (E2) and 120 mg trenbolone acetate (TBA). Dosing patterns were 8 mg E2 and 40 mg TBA given 3 times; 12 mg E2 and 60 mg TBA given 2 times or 24 mg E2 and 120 mg TBA given 1 time. Implanted cattle had heavier body weights, increased average daily gain, and lower feed conversion compared to non-implanted controls. …
Combination Of Synovex-S¹ And Finaplix-S² For Yearling Steers, J. J. Wagner, R. H. Pritchard
Combination Of Synovex-S¹ And Finaplix-S² For Yearling Steers, J. J. Wagner, R. H. Pritchard
South Dakota Beef Report, 1992
Two hundred seventy-seven crossbred yearling steers (719 Ib) were utilized in a 3-year study to determine the effect of combinations of Synovex-S and Finaplix-S on daily gain and carcass merit. Treatments included no implant (C), implanted with Synovex-S on day 1 and Synovex-S on about day 60 (SS), and implanted with Synovex-S on day 1 and the combination of Synovex-S and Finaplix-S on about day 60 (SSF). In year 1, all steers were slaughtered after 124 days on feed. In year 2, steers were slaughtered after 120, 134, or 148 days on feed. In year 3, steers were slaughtered after …
Combinations Of Synovex¹ And Finaplix² For Yearling Steers, J. J. Wagner, R. H. Pritchard
Combinations Of Synovex¹ And Finaplix² For Yearling Steers, J. J. Wagner, R. H. Pritchard
South Dakota Beef Report, 1991
Ninety crossbred yearling steers (818 ± 19 Ib) were utilized to evaluate the influence of implant treatment and days on feed on carcass characteristics and feedlot average daily gain (ADG). Treatments included no implant (C), implanted with Synovex-S on day 1 and Synovex-S on day 60 (SS) and implanted with Synovex-S on day 1 and with Synovex-S and Finaplix-S on day 60 (SSF). Ten steers from each treatment were slaughtered after 120, 134 or 148 days on feed. Implanting increased (P< .0001) ADG 18.9% and hot carcass weight (HCW) 6.4%. However, interactions between treatment and days on feed were significant (P<.05) for ADG and HCW. No other interactions were apparent. Rib eye area (REA) was 4.7% greater (P<.05) for implanted steers as compared to nonimplanted controls (13.72 vs 13.11 in.2). ADG (P<.12), HCW (P<.10) and REA (P<.05) were greater for steers implanted with SSF as compared to steers implanted with SS (3.90 vs 3.75 Ib, 846 vs 831 Ib, and 14.06 vs 13.38 in. , respectively). Marbling score (5.00 = Small°) tended (P<.16) to be lower for implanted steers compared with nonimplanted controls (5.54 vs 5.77 units). Marbling score was slightly (P<.16) lower for cattle implanted with SSF as compared to cattle implanted with SS (5.40 vs 5.67). Predicted days required to reach 75% low choice were 113, 124 and 138 for C, SS and SSF, respectively.
Effects Of Estradiol-Trenbalone Acetate Implant Combinations On Feedlot Performance And Carcass Traits Of Two Steer Types, R.H. Pritchard, D.H. Gee, M.A. Robbins
Effects Of Estradiol-Trenbalone Acetate Implant Combinations On Feedlot Performance And Carcass Traits Of Two Steer Types, R.H. Pritchard, D.H. Gee, M.A. Robbins
South Dakota Beef Report, 1990
Hereford x Angus (HA) and predominantly Gelbvieh cross (Gx) steer calves either received no implant (control) or were implanted initially and again at 77 days on feed with a combination of estradiol and trenbalone acetate based implants. Calves were started on feed in December weighing 677 Ib and fed for 146 to 167 days. Fed for a common period of time, implanting steers increased (Pc.05) ADG, dry matter intake, final weight, carcass weight, rib fat thickness and yield grade. Implanting reduced (Pc.01) marbling scores. Gx steers were heavier and grew more rapidly than HA steers. There were no interactions between …
Combinations Of Synovex And Finaplex For Yearling Steers, J.J. Wagner, R.H. Pritchard, J.U. Thomson, M.J. Goetz
Combinations Of Synovex And Finaplex For Yearling Steers, J.J. Wagner, R.H. Pritchard, J.U. Thomson, M.J. Goetz
South Dakota Beef Report, 1990
One hundred twenty-three yearling black baldy steers were fed in one pen for 123 days at a commercial feedlot near Kimball, South Dakota. On day 1 in the feedlot, 53 steers were implanted with Synovex-S, 53 steers were implanted with the combination of Synovex-S and Finaplix-S and 17 steers received no implant. On day 60 in the feedlot, 18 of the Synovex-S steers and 18 of the combination steers were reimplanted using Synovex-S. Also on day 60, 18 of the Synovex-S steers and 18 of the combination steers were reimplanted using the combination of Synovex-S and Finaplix-S. The remaining steers …
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Suckling Calves, D.L. Whittington
Comparison Of Ralgro, Compudose And Synovex-C Implants On The Growth Performance Of Suckling Calves, D.L. Whittington
South Dakota Beef Report, 1986
Growth response to a single implant was measured in suckling steer and heifer calves grazing native range on three ranches in South Dakota, The steers (628 head) were randomly allotted on each ranch to either a Ralgro, Compudose, Synovex-C or no implant treatment. The heifers (714 head) were randomly allotted on each ranch to either a Ralgro, Synovex-C or no implant treatment. Implants were administered according to manufacturers' recommendations. The calves were weighed at the time of implanting and again 163 days later at weaning. The ears of steers receiving a Compudose implant were palpated at weaning to determine retention. …