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Articles 91 - 120 of 296
Full-Text Articles in Animal Sciences
Evaluation Of Estrous Response Patches As A Tool To Determine Optimum Timing For Artificial Insemination And If Gonadotropin-Releasing Hormone Is Needed At Timed-Ai In Beef Cattle, Danilo Demeterco
LSU Master's Theses
Two experiments evaluated using an estrous-detection patch to identify animals that are in standing estrus at split-timed AI (STAI) and the necessity of a gonadotropin-releasing hormone (GnRH) injection at STAI on a 7-Day CO-Synch + CIDR protocol. In experiment 1 (n=216) and in experiment 2 (n=101), multiparous lactating crossbred beef cows were stratified by age, BW, BCS, and post-partum interval to 2 treatment groups: CTRL=timed-AI (TAI) at 72h post CIDR removal, or TRT=STAI at 72 or 84h post CIDR removal. All females received GnRH plus a CIDR on d0, prostaglandin-F2α, CIDR removal, and an Estrotect estrous-detector patch on d7. At …
Effects Of Timing Of Local Anesthesia On Physiological Responses In Calves After Dehorning, Amanda Jane Mathias
Effects Of Timing Of Local Anesthesia On Physiological Responses In Calves After Dehorning, Amanda Jane Mathias
LSU Master's Theses
The American Veterinary Medical Association has stated the importance of minimizing pain associated with dehorning to limit the amount of distress and changes in the animal’s behavior and physiological states (AVMA, 2014b). The following studies aim to determine the effect of timing of lidocaine administration on physiological responses in calves after dehorning. The first study compared cortisol and substance P levels in calves dehorned immediately after administration of lidocaine and meloxicam, calves dehorned 10 minutes after the administration of lidocaine and meloxicam, and calves that were administered lidocaine and meloxicam and not dehorned. It was concluded waiting 10 minutes after …
Evaluation Of A Role For Prolactin In The Recrudescense Of Ovarian Activity In Seasonally Anovulatory Mares, Erin Lea Oberhaus
Evaluation Of A Role For Prolactin In The Recrudescense Of Ovarian Activity In Seasonally Anovulatory Mares, Erin Lea Oberhaus
LSU Doctoral Dissertations
A series of experiments studied the possible role for prolactin in the spring-time recrudescence of ovarian activity in mares. The first experiment was based on cabergoline administration to seasonally anovulatory mares to prevent the seasonal rise in endogenous plasma prolactin to assess whether reduced prolactin altered onset of ovarian activity or first ovulation. Although prolactin concentrations were reduced, basal prolactin concentrations recovered from suppression by the time of the next injection (10 days later), even though low-dose sulpiride stimulation of prolactin was still suppressed by 85%. The subsequent experiment tested whether season affected the duration and degree of suppression produced …
Modern Vet Management Business Plan, Alaina Stanton
Modern Vet Management Business Plan, Alaina Stanton
Honors Capstones
No abstract provided.
Development Of A Transposon-Based Vector To Express Large Quantities Of Factor Viii, Allison Mikes
Development Of A Transposon-Based Vector To Express Large Quantities Of Factor Viii, Allison Mikes
Honors Capstones
No abstract provided.
The Evaluation Of Eprinomectin (Longrange®) On Long-Term Parasitic Infection In Nursing Calves During Summer Grazing®, Lyndsea D. Seibert
The Evaluation Of Eprinomectin (Longrange®) On Long-Term Parasitic Infection In Nursing Calves During Summer Grazing®, Lyndsea D. Seibert
LSU Master's Theses
One of the most significant threats to the well-being and performance of grazing livestock are gastrointestinal nematode (GIN) parasitic infections. Allowing a large GIN burden to manifest can cause a significant cost in terms of productivity in grazing cattle. Beef producers commonly rely greatly on the efficacy of broad-spectrum anthelmintics, to not only kill resident worms but to also prevent the establishment of ingested infective stage larvae (L3) for a period following treatment. Eprinomectin (LONGRANGE®, E-LR) is the first extended-release injectable cattle dewormer that claims to provide cattle producers season-long persistent parasite control for 100 to 150 d in a …
Effects Of Calf Starter Composition And Mixing Method On Growth And Rumen Health In Young Dairy Calves, Ruth Marisol Orellana Rivas
Effects Of Calf Starter Composition And Mixing Method On Growth And Rumen Health In Young Dairy Calves, Ruth Marisol Orellana Rivas
LSU Master's Theses
Twenty-four male Holstein calves (BW = 38.78 ± 7.26 Kg) were used to evaluate the effects of commercially available or farm mixed starter on animal performance, blood metabolites, and rumen health. Calves were randomly assigned to one of two treatments which included: commercial calf starter (minimum 20% CP; CCS) and starter of similar nutrient content but hand mixed on farm (FMS). Calves were offered treatments ad libitum on days 4 through 84. Milk replacer (MR) was offered beginning on day 4. On day 42, MR was reduced to once daily to decrease intake by 50%. On day 49 calves were …
Comparison Of Domestic Fresh And Frozen And Imported Frozen Goat Meat, Jeffrey Cole Denis Gregorie
Comparison Of Domestic Fresh And Frozen And Imported Frozen Goat Meat, Jeffrey Cole Denis Gregorie
LSU Master's Theses
The objective of this research was to determine differences in carcass evaluation, yield, and meat quality from representative fresh domestic (FSD), frozen domestic (FZD), and frozen imported Australian (FIA) goat carcass sides (n=30 from each source). The U.S. carcasses were split into sides and the right side frozen and stored for 6 weeks. Left sides were fabricated into standardized primal cuts. After frozen storage, right sides and FIA carcasses were thawed for 3 days at 4°C. Three experiments were conducted on the carcass traits and meat yields, quality differences in leg cut, and differences in loin and racks across freezing …
Effect Of Increasing Levels Of Dietary Zinc (Zn), Manganese (Mn), And Copper (Cu) From Organic And Inorganic Sources On Egg Quality And Egg Zn, Mn, And Cu Content In Laying Hens, Nancy Katherine Rubio Zapata
Effect Of Increasing Levels Of Dietary Zinc (Zn), Manganese (Mn), And Copper (Cu) From Organic And Inorganic Sources On Egg Quality And Egg Zn, Mn, And Cu Content In Laying Hens, Nancy Katherine Rubio Zapata
LSU Master's Theses
Feeding laying hens or broiler breeder hens organic sources of trace minerals can improve egg quality, especially as related to shell quality. The objectives of this research were to evaluate the effect of increasing laying hen dietary zinc (Zn) levels on the content of Zn and other minerals in eggs (boron (Bo), iron (Fe), and calcium (Ca)), and to evaluate the effect of feeding increasing Zn, manganese (Mn) and copper (Cu) levels from inorganic (ITM) and organic (OTM) sources on egg quality and yolk content of Zn, Mn, and Cu. In the first experiment, a total of 64 (48 weeks …
The Effect Of Sericea Lespedeza (Lespedeza Cuneata) On Eimeria Spp. Infection In Broiler Chickens, Long Nghi Trinh
The Effect Of Sericea Lespedeza (Lespedeza Cuneata) On Eimeria Spp. Infection In Broiler Chickens, Long Nghi Trinh
LSU Master's Theses
Parasites cause considerable economic losses in all fields of agriculture. In the poultry industry, coccidia infections are of major significance costing billions of dollars every year. Research on condensed tannins (CT) has been shown to be effective against various parasites such as gastrointestinal nematodes and Eimeria spp. in small ruminants. This study tested the effects of the CT containing forage, sericea lespedeza (SL), on broiler chickens infected with live Eimeria spp. oocysts. In Study 1, 300 Ross 708 broiler chicks were divided into 6 groups (negative control, positive control w/BioCox, 0% SL, 5% SL, 10% SL, 15% SL). In Study …
Vitrification Of Immature And Mature Bovine Oocytes, Paige T. Hardin
Vitrification Of Immature And Mature Bovine Oocytes, Paige T. Hardin
LSU Master's Theses
Vitrification is the latest technique used in cryopreservation, the ability to utilize this method with oocytes and embryos has become a valuable system. Vitrification has been successful with bovine embryos and oocytes but is far from optimal. Following cryopreservation storage discarding embryos can cause ethical issues, and mature oocytes have fragile organelles that can be detrimentally affected by ice crystal formation during freezing. Immature oocytes have not formed some of these temperature sensitive microfilaments and can circumvent these detrimental effects. The common intracellular cryoprotective agents are dimethyl sulfoxide, glycerol and ethylene glycol. Different combination of these agents have been reported …
Integrated Methods For Controlling Gastrointestinal Nematode Infections In Ewes And Lambs, Sarah Tammy Nicole Keeton
Integrated Methods For Controlling Gastrointestinal Nematode Infections In Ewes And Lambs, Sarah Tammy Nicole Keeton
LSU Doctoral Dissertations
Gastrointestinal nematode (GIN) parasites cause extensive damage to small ruminants, and Haemonchus contortus is a major concern to production worldwide. With the development of GIN resistance to anthelmintics, alternative strategies for control are needed. The major component of this study compared two strategies for effect on animal health and changes in GIN population. One flock of ewes and lambs (Strategy 1, S1) employed targeted selective treatment (TST) with an anthelmintic based on FAMACHA score, and one flock (Strategy 2, S2) employed sericea lespedeza (SL) supplement feeding and TST with copper oxide wire particles (COWP) based on FAMACHA score. S1 ewes/lambs …
Failure Of A Heterologous Recombinant Sca5/Ompb Protein-Based Vaccine To Elicit Effective Protective Immunity Against Rickettsia Rickettsii Infections In C3h/Hen Mice, Sean P. Riley, Marissa M. Cardwell, Yvonne G. Chan, Ludovic Pruneau, Fabio Del Piero, Juan J. Martinez
Failure Of A Heterologous Recombinant Sca5/Ompb Protein-Based Vaccine To Elicit Effective Protective Immunity Against Rickettsia Rickettsii Infections In C3h/Hen Mice, Sean P. Riley, Marissa M. Cardwell, Yvonne G. Chan, Ludovic Pruneau, Fabio Del Piero, Juan J. Martinez
Faculty Publications
Spotted fever group (SFG) rickettsial species are obligate intracellular tick-borne pathogens that are responsible for important human diseases. Previous reports have demonstrated the feasibility of using recombinant surface cell antigen Sca5/OmpB to elicit protective immunity against homologous challenges using murine models of Mediterranean spotted fever and Rocky Mountain spotted fever. In addition, the feasibility of generating cross-protective immunity against related rickettsial species has also been established, but the molecular basis for these phenomena was not explored. Here, we demonstrate that vaccination of C3H/HeN mice with a recombinant OmpB domain derived from Rickettsia conorii induced high titer humoral immune responses that …
Manual For Ageing And Sexing Birds Of Bosque Fray Jorge National Park And Northcentral Chile, With Notes On Range And Breeding Seasonality, Peter Pyle, Andrew Engilis, Douglas A. Kelt
Manual For Ageing And Sexing Birds Of Bosque Fray Jorge National Park And Northcentral Chile, With Notes On Range And Breeding Seasonality, Peter Pyle, Andrew Engilis, Douglas A. Kelt
Special Publications of the Museum of Natural Science
Bosque Fray Jorge National Park (hereafter "Fray Jorge") comprises 9,959 ha on the coast of Chile’s Region IV (Coquimbo), approximately 400 km north of Santiago and 100 km south of La Serena (30°41’S, 71°40’W) (Fig. 1). It is a Biosphere Reserve and has been protected from grazing and disturbance since 1941 (Squeo et al. 2004). As such, it is a biotic oasis surrounded by agricultural and increasingly disturbed terrain (Bahre 1979). The climate is Mediterranean, with ca. 130 mm of annual precipitation measured since 1989 at an on-site meteorological station, 90% falling in winter (May-Sept). Summers are warm and dry, …
Manual Para Estimar Edad Y Sexo En Aves Del Parque Nacional Bosque Fray Jorge Y Chile Central, Con Notas Sobre Rangos De Distribución Y Estación Reproductiva, Peter Pyle, Andrew Engilis Jr., Douglas A. Kelt
Manual Para Estimar Edad Y Sexo En Aves Del Parque Nacional Bosque Fray Jorge Y Chile Central, Con Notas Sobre Rangos De Distribución Y Estación Reproductiva, Peter Pyle, Andrew Engilis Jr., Douglas A. Kelt
Special Publications of the Museum of Natural Science
El Parque Nacional Fray Jorge (en adelante "Fray Jorge") comprende 9.959 ha. en la costa de la IV Región de Chile (Coquimbo), a unos 400 km al norte de Santiago y a 100 km al sur de La Serena (30 ° 41'S, 71 ° 40'W) (Fig. 1). Se trata de una Reserva de la Biosfera que se ha protegido del pastoreo y las perturbaciones antrópicas desde 1941 (Squeo et al. 2004). Como tal, es un oasis biótico rodeado de áreas agrícolas cada vez más intervenidas por el hombre (Bahre 1979). El clima es mediterráneo, con 130 mm de precipitación anual, …
Effects Of Milk Replacer And Multivitamin-Mineral Supplementation On Performance Of Heat Stressed Dairy Calves, Steven Joseph Blair
Effects Of Milk Replacer And Multivitamin-Mineral Supplementation On Performance Of Heat Stressed Dairy Calves, Steven Joseph Blair
LSU Master's Theses
Seventy-one Holstein calves were used to evaluate the effects of milk replacer (MR) feeding management alone or in combination with a multivitamin-electrolyte supplement on growth and mitigation of heat stress. Milk replacer treatments consisted of Land O’Lakes Herdmaker Supreme (20% CP, 20% fat) and Land O’Lakes Warm Front (27% CP, 10% fat). Calves received either 0 or 20 ml Palamountains Calf Boost® in MR once daily. Calves were offered treatments beginning on day 4. Calves on 27% CP : 10% fat MR were fed 2.72kg MR twice daily for the first three weeks of life, and 3.86kg twice daily until …
The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet
The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet
LSU Master's Theses
Distiller’s dried grains with solubles (DDGS) is a common byproduct of the ethanol industry and is used in animal feeds. Carotenoids (xanthophylls) are already present in the human eye, and increasing the amount of carotenoids in the eye can help prevent eye diseases. The purpose of this research was to confirm that adding DDGS to standard corn and soybean meal hen diets may increase the amount of lutein available in egg yolks. An experiment was conducted with Hy-Line W-36 hens to evaluate the effects of DDGS in corn-soybean meal diets. Three hundred fifteen hens were fed one of seven treatment …
A Quantitative And Molecular Evaluation Of Bovine Respiratory Disease, Growth Traits, And Carcass Traits In Crossbred Steers, Samantha Lidia Miller
A Quantitative And Molecular Evaluation Of Bovine Respiratory Disease, Growth Traits, And Carcass Traits In Crossbred Steers, Samantha Lidia Miller
LSU Master's Theses
The first objective of the two studies presented herein evaluated on farm sources of variation and correlated effects contributing to BRD incidence in a population of crossbred steers sent to the feedlot from 2010-2013. Analyses revealed that incidence of BRD was lowly positively correlated to birth weight (BW) and lowly negatively correlated to weaning weight (WW), hip height (HH), sire breed, site, and birth year. These results indicate that the traits analyzed herein are not precursors for BRD in the current population. However, since little is still known about the correlation between genetic predisposition to BRD and animal performance, further …
Salt Tolerance Of Lactococcus Lactis R-604 As Influenced By Exposure To Various Stress Conditions, Ernesto Emilio Gonzalez Duran
Salt Tolerance Of Lactococcus Lactis R-604 As Influenced By Exposure To Various Stress Conditions, Ernesto Emilio Gonzalez Duran
LSU Master's Theses
Lactococcus lactis is a dairy culture bacterium widely used in dairy products that contain salt (NaCl) such as cheese and salted butter. Osmotic conditions generally hinder the growth of both pathogen and desirable bacteria. It has been observed that many stress-induced proteins are produced after exposure to an environmental stress protecting the cell against other stresses since the first exposure starts the defense mechanisms of the cells creating an effect of cross-protection. If salt tolerance is enhanced in desirable bacteria they would survive better in salty environments. The objective of this study was to evaluate the salt tolerance of Lactococcus …
A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer
A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer
LSU Master's Theses
The first objective of the current study was to evaluate genetic trends from 10 years of the American Brahman Breeders Association Carcass Evaluation Program from 2004 to 2013. Changes of performance in growth, carcass composition, and carcass quality traits were evaluated. Overall means were calculated to report the total average for each trait along with an average rate of change per year. Growth traits evaluated included feedlot entrance weight (INWT), harvest weight (HRVWT), and average daily gain (ADG). Carcass composition and quality traits evaluated included hot carcass weight (HCW), rib eye area (REA), marbling score (MARB), dressing percent (DP), quality …
Live And Carcass Characteristics Of Boer- And Savannah-Cross Kid Buckling Goats Fed Dried Distillers Grain With Solubles, James Neil Maynard
Live And Carcass Characteristics Of Boer- And Savannah-Cross Kid Buckling Goats Fed Dried Distillers Grain With Solubles, James Neil Maynard
LSU Master's Theses
The available supply of domestic goat meat has not matched the increased demand for goat meat. High cost of production is a concern of goat producers, with feed being a major factor in input expenses. Increasing slaughter weight of kid meat goats would increase the available goat meat, but requires added nutrition beyond that obtained from typical forage based systems for goat production. Savannah bucklings (n=31) and Boer bucklings (n=28) were stratified by weight and breed and were randomly assigned a treatment of 0 (T1), 15 (T2), 30 (T3), or 45 (T4) percent dried distillers grain with solubles (DDGS). One …
The Effects Of Post-Exercise Consumption Of A Kefir Beverage On Performance And Recovery During Intensive Endurance Training, Keely Virginia O'Brien
The Effects Of Post-Exercise Consumption Of A Kefir Beverage On Performance And Recovery During Intensive Endurance Training, Keely Virginia O'Brien
LSU Doctoral Dissertations
This study was designed to determine whether kefir accentuates the positive health benefits assessed by measures in fitness and/or body composition, as a measure of cardiovascular disease risk as well as the biomarker c-reactive protein. Sixty-seven adult males and females aged 18-35 years were assigned to one of four groups: 1) endurance training + control beverage, 2) endurance training + kefir beverage, 3) active control + control beverage or 4) active control + kefir beverage. The exercise groups completed 15 weeks of structured endurance training while the active control groups maintained their usual exercise routine. Baseline physiological and exercise measurements …
The Use Of Assisted Reproductive Technologies To Improve Pregnancy Rates In White-Tailed Deer, Jaclyn C. Lambe-Steinmiller
The Use Of Assisted Reproductive Technologies To Improve Pregnancy Rates In White-Tailed Deer, Jaclyn C. Lambe-Steinmiller
LSU Doctoral Dissertations
Detection of estrus in white-tailed (WT) deer is laborious and often missed, as there are few visual cues presented during the 24 h period in which females are receptive to mating. Reproductive management of WT operations is improved by the use of fixed-timed artificial insemination (FTAI) protocols. Fixed-timed AI removes the need for estrus detection and ensures the breeding of an entire herd, as well as the ability to schedule fawning within predetermined timeframes. Two studies evaluated two FTAI regimens and their ability to synchronize estrous in WT. The first study implemented the administration of eCG 200 IU (im) at …
Cryopreservation Of Domestic Cat Epididymal Spermatozoa, Jesse Ray Saenz
Cryopreservation Of Domestic Cat Epididymal Spermatozoa, Jesse Ray Saenz
LSU Doctoral Dissertations
The primary lines of defense in preventing any exotic species from becoming endangered or extinct should be the protection of their habitat and from poaching. For wildlife conservationists, these primary measures are often not feasible, and thus cannot be the only means to prevent extinction. The objective of this research was to identify a semen extender that contained little to no egg yolk and could still effectively freeze domestic cat epididymal spermatozoa, for the purpose to sort spermatozoa into X and Y, using flow cytometry. In the first experiment we compared a TesT (Tes + Tris) 20% egg yolk extender …
Making A Big Splash With Louisiana Fishes, Prosanta Chakrabarty, Sophie Warny, Valerie Derouen
Making A Big Splash With Louisiana Fishes, Prosanta Chakrabarty, Sophie Warny, Valerie Derouen
Special Publications of the Museum of Natural Science
This book is a companion piece to Making a Big Splash with Louisiana Fishes, an exhibit created in 2012 at Louisiana State University’s Museum of Natural Science (MNS)
A Quantitative And Molecular Evaluation Of Calves Sired By Three Different Breeds For Growth, Performance, And Carcass Traits, Malcolm Seth Mizell
A Quantitative And Molecular Evaluation Of Calves Sired By Three Different Breeds For Growth, Performance, And Carcass Traits, Malcolm Seth Mizell
LSU Master's Theses
The first objective of the two studies in the research herein was to evaluate growth, performance and carcass quality and composition traits from a group of spring born calves sired by Charolais, Braunvieh, or Simmental bulls. Growth traits analyzed included birth weight (BW), weaning weight (WW), and hip height (HH). Carcass quality and composition traits analyzed included hot carcass weight (HCW), rib eye area (REA), back fat thickness (BF), marbling score (MS), and yield grade (YG). Analysis revealed Simmental sired calves were significantly heavier (P<.05) at birth when compared to Charolais and Braunvieh sired calves. Braunvieh sired calves were reported to be significantly (P<.05) shorter than Simmental sired calves for hip height. Hot carcass weight analysis revealed that Charolais sired calves were significantly (P<.05) heavier when compared to Braunvieh sired calves. No individual sire breed group displayed any significant differences for weaning weight, rib eye area, back fat thickness, marbling score, or yield grade. The second objective was evaluate potential SNP associations on four candidate genes with growth, performance, and carcass composition traits in a population of crossbred steers sired by Charolais, Braunvieh, and Simmental bulls. Traits analyzed for growth, performance, and carcass traits were previously mentioned. Analysis was performed on 38 steer calves. Single nucleotide polymorphisms within four candidate genes including Thyroglobulin (TG), Adiponectin (ADPOQ), Insulin like growth factor-1 (IGF-1), and Calpastatin (CAST) were chosen for analysis. A total of 14 SNP on TG, ADPOQ, CAST, and IGF-1 genes were significantly associated with birth weight and weaning weight. Analysis revealed 13 SNP on TG, ADPOQ, IGF-1, and CAST genes significantly associated (P<.05) with HCW, BF, MS, and YG. No markers were reported to be significantly associated (P<.05) with HH or REA. A total of 11 markers with 3 markers located on the ADPOQ gene, 1 marker located on the IGF-1 gene, 3 markers located on the TG gene, and 5 markers located on the CAST gene were significantly associated with both growth and carcass traits.
Effect Of Tissue Source On Adult Equine Multipotent Stromal Cell Pluripotency Induction Treatment With Synthetic Mrna, Javier Martin Jarazo
Effect Of Tissue Source On Adult Equine Multipotent Stromal Cell Pluripotency Induction Treatment With Synthetic Mrna, Javier Martin Jarazo
LSU Master's Theses
Autogenous and autologous adult multipotent stromal cells are applied to treat equine musculoskeletal injuries in clinical practice. However, options for autologous therapy in the equine specie are restricted due to the limited biological material obtained or MSCs tissue harvest procedure and because of their unpredictable in vivo behavior. Induced pluripotent stem cells represent an alternative to overcome these limitations. Traditionally, iPSCs are produced by introducing DNA for early embryonic genes into cells with viruses. The method tested in this study, avoids the use of viral vectors and potential for exogenous DNA integration into the cell’s genome by utilizing a lipid …
Effects Of Feeding Milk Replacer Once, Twice Or Three Times Daily On Growth And Performance In Neonatal Holstein Calves, Michael Thomas
Effects Of Feeding Milk Replacer Once, Twice Or Three Times Daily On Growth And Performance In Neonatal Holstein Calves, Michael Thomas
LSU Master's Theses
Sixty-three neonatal Holstein calves (45 female; 18 male) were assigned to one of 3 treatments at d 2 of age to study effects of milk replacer feeding frequency on growth, performance, and health. Treatments consisted of 1X, with total amount of reconstituted milk replacer fed 1X/day at 6:00 a.m.; 2X, with total amount of reconstituted milk replacer divided into 2 equal amounts and fed at 6:00 a.m. and 5:00 p.m.; or 3X, with total amount of reconstituted milk replacer divided into 3 equal amounts and fed at 6:00 a.m., 12:00 noon, and 5:00 p.m. Calves were housed in individual hutches …
Regulation Of Oocyte Meiotic Resumption Using Camp Modulators In Bovine In Vitro Maturation, Sarah Farmer
Regulation Of Oocyte Meiotic Resumption Using Camp Modulators In Bovine In Vitro Maturation, Sarah Farmer
LSU Master's Theses
In vitro maturation (IVM) is a reproductive technique critical to in vitro embryo production (IVP) in commercial livestock industries, research, and human infertility treatment. Currently, IVP has low efficiency due to an inadequate IVM system in which premature meiotic resumption results in low oocyte viability. Meiotic arrest is regulated primarily by 3’,5’-cyclic adenosine monophosphate (cAMP), and the most successful methods of improving IVM utilize cAMP modulators to maintain high intra-oocyte cAMP, delaying the onset of maturation. This thesis includes experiments comparing standard bovine IVM to a novel extended IVM method similar to the procedure described by Albuz and colleagues (Albuz …
Impacts Of Feeding Baleage To Beef Calves During The Backgrounding Period, Rachel Morgan Martin
Impacts Of Feeding Baleage To Beef Calves During The Backgrounding Period, Rachel Morgan Martin
LSU Master's Theses
Two hundred forty beef calves (BW = 217 ± 20.6 kg) were used to evaluate performance, blood metabolites, and rumen development from feeding bermudagrass or ryegrass and rye baleage. Calves were stratified by BW, sex, and breed and assigned to one of 12 paddocks (0.40 ha each) with 4 treatment diets and fed for a 60 d backgrounding period. Diets included: early boot stage bermudagrass hay, (BERH); early boot stage ryegrass and rye baleage (ERRG); late bloom stage ryegrass and rye baleage, (LRRG); and early boot stage bermudagrass baleage, (BERB). Calves on BERH, LRRG, and BERB had free choice access …