Angelo State University
Permanent URI for this collectionhttps://hdl.handle.net/2249.1/9389
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Item This is a test submission(1999-01-21)Item This is a test submission(1999-01-21)Item The mediating effect of perceived organizational support on espoused safety attitudes: a field study(2011-02-17) Apodaca, Steven P.; Apodaca, Steven P.; Schell, Kraig L.; Hack, Tay; Davidson, William; Walker, Molly; Gee, Donna; Angelo State University. Department of Psychology, Sociology and Social Work.This research examined a proposed mediated model of safety attitudes and perceived organizational support in affecting safety outcomes in a population of nurses within a West Texas community hospital. Participants completed questionnaires pertaining to the aforementioned measures, and supervisors were solicited to complete a questionnaire pertaining to safety behaviors of subordinates within their respective departments. Data analysis revealed significant correlations among safety attitudes and perceived organizational support but failed to show support for a mediated model. Explanations as to why hypotheses were not supported are discussed, as well as avenues for future research.Item Will super juniper-eating sires produce super juniper-eating offspring?(2011-03-03) Tidwell, Kendall W.; Tidwell, Kendall; Scott, Cody B.; Simpson, Warren K.; Walker, John W.; Salisbury, Micheal W.; Angelo State University. Department of Agriculture.When preconditioned in pens, goats develop a preference for juniper on pasture. The objective of this study was to see if sires selectively bred for high juniper consumption produce offspring that consume more juniper than offspring from sires chosen for production characteristics. Five sires chosen for high juniper consumption and five sires chosen for production characteristics were bred to 7 does each (n= 70). Kids were weaned at 90 days of age and placed in individual pens for feeding trials. Consumption of juniper was measured and compared among sire groups. Body condition scores and weights were taken and compared among sire groups after goats were on feed for 30 days following each feeding trial. There were no differences in juniper consumption, body condition scores, and weights among treatments. Goats increased juniper consumption daily in individual pens.Item Estimates of efficiency of Dorper and Rambouillet lambs.(2011-05-03T20:03:15Z) Yeaman, Jessup; Yeaman, Jessup; Waldron, Dan; Craddock, B. Frank; Engdahl, Gil; Salisbury, Michael; Scott, David; Angelo State University. Department of Agriculture.Feed intake and body weight were recorded on thirty-seven Dorper ram lambs and forty-two Rambouillet ram lambs from weaning to 61kg of body weight to determine feed conversion efficiency. The data were collected over a two year period. Lambs were progeny of 6 unrelated sires per breed. Lambs were approximately 90 days of age and 31kg body weight at the start of the trial. Lambs were fed a commercially prepared, pelleted diet with an average crude protein content of 16% and TDN of 70.5%. Lambs were divided into groups of 10-11 containing both breeds, and fed using FIRE (Feed Intake Recording Equipment, Osborne Industries, Inc, Osborne, KS, USA). Lambs were identified using a unique electronic identification ear tag transponder. Feed intake was recorded electronically and lambs were weighed every two weeks. Data were analyzed using SAS PROC MIXED with a model that included breed and birth type as fixed effects, a random effect for sire, and starting weight as a covariate. In both years of the trial, breed was not found to have a statistically significant effect on ADG or FCE (p>0.05). Post weaning feed efficiency was similar between Dorper and Rambouillet lambs. The Dorpers’ total ADG was 340 g/d; the Rambouillets’ was 342 g/d. The Dorpers’ average FCE was 0.159; the Rambouillets’ was 0.158. Over the post weaning period studied there was no advantage shown by either breed.Item The moderating effects of psychological flexibility on workload variability and its affective outcomes.(2011-05-09T20:30:45Z) Mitchell, Michelle A.; Mitchell, Michelle Ann; Schell, Kraig; Cordell-McNulty, Kristi; Ashworth-King, Erin; Stenmark, Cheryl; Angelo State University. Department of Psychology, Sociology and Social Work.A performance decrement is consistently observed when people shift from high to low workload in laboratory studies (Cumming & Croft, 1973; Goldberg & Stewart, 1980; Matthews, 1986; Cox-Fuenzalida, 2000). Two explanations are currently debated in the literature; however, the underlying mechanism perpetuating the decrement is still unknown. This study aimed to offer evidence for the limited resource explanation by looking at psychological flexibility, a construct that is reported to increase the availability of cognitive resources. It was hypothesized that psychological flexibility would predict above and beyond condition status on the dependent variables: performance post-shift, negative affect, and workload. Multiple hierarchical regressions were conducted to assess the hypotheses and the data did not support the hypotheses. Results are discussed as well as limitations and future directions for research.Item Effect of Neofat on offspring sex ratios in Rambouillet and Suffolk sheep.(2011-05-10T21:35:24Z) Lange, Sarah E.; Lange, Sarah; Branham, Loree A.; Engdahl, Gril R.; Pier, Charles A.; Angelo State University. Department of Agriculture.Maternal diet and body condition are conceivably the most studied factors influencing sex ratio. The objective of this study was to determine if Neo-fat® influences offspring sex ratio in Rambouillet and Suffolk sheep. Ewes were randomly assigned to one of two treatments (n = 46). Treatment 1 consisted of a basal diet to serve as a control, and Treatment 2 consisted of the basal diet plus Neo-Fat fed at 0.46% of body weight. Ewes were bred after four weeks of feeding and continued to be fed for an additional two weeks. Blood samples were taken at breeding to determine differences in NEFA concentrations in serum. Results were only considered for ewes lambing as a result of being bred on the first estrus cycle and indicated no differences among NEFA concentrations, lamb sex ratios or lamb birth weights (P > 0.05).Item Assessing the construct validity of the situational test of emotional management.(2011-05-11T21:48:14Z) Hartman, Michael J.; Hartman, Michael James; Schell, Kraig; Stenmark, Cherly; Hester, Rosy; Mowrer, Robert; Angelo State University. Department of Psychology, Sociology and Social Work.The current study examined the construct validity of the Situational Test of Emotional Management (STEM), a newly developed measure of emotional intelligence. A logistic regression approach was utilized to assess the STEM, at the item-level, on two factors, gender and Extraversion. It was hypothesized a logistic model including gender and Extraversion would significantly predict classification of participants into two groups (correct response on STEM items and incorrect response on STEM items) beyond a simple intercept-only logistic regression. Data analysis revealed that the gender and Extraversion did not significantly enhance the classification rates of participants into the two groups, but gender was a significant univariate influence on four items. Explanations as to why the hypothesis was not fully supported are discussed, as well as avenues for future research.Item Phylogeography of the cottonmouth, Agkistrodon piscivorus, using AFLP and venom protein profiles.(2011-05-25T14:32:04Z) Strickland, Jason L.; Strickland, Jason; Ammerman, Loren K.; Ross, Linda; Maxwell, Terry C.; Parkinson, Christopher L.; Angelo State University. Department of Biology.The objective of this study was to examine population structure in cottonmouths (Agkistrodon piscivorus) using Amplified Fragment Length Polymorphism (AFLP) and compare genetic and venom protein profiles in Texas. AFLP profiles using 622 fragments were generated for 105 individuals to understand the level of variation within Agkistrodon. In Texas, there was a significant lack of gene flow detected and support for the isolation of Concho Valley individuals. Cottonmouths showed the greatest genetic variation when compared to other Agkistrodon species but there was not complete support for two species of cottonmouths as currently proposed. RP-HPLC was used to examine venom protein profiles in 86 Texas cottonmouths. Relative peak heights were analyzed using PCA and the MANOVA demonstrated separation of populations based on profiles (p<0.001). Genetic and venom variation did not follow the same pattern indicating that there may be other selection pressures acting on the venom proteins.Item Effects of protein supplementation on the consumption of salt cedar in goats.(2011-05-25T17:01:19Z) Garcia, Ruben A.; Garcia, Ruben A.; Scott, Cody; Salisbury, Michael; Engdahl, Gil R.; May, Brain J.; Angelo State University. Department of Agriculture.Saltcedar (Tamarix ramosissima Ledeb.) has encroached upon many Texas riparian and floodplain areas, causing decreases in water quality and plant/animal diversity. The objectives of this study were to determine if (1) goats would increase consumption of salt cedar, and (2) if protein supplementation improved salt cedar intake. Goats (n=20) were randomly selected and divided into 2 separate treatments. Treatment 1 was supplemented daily with a 37% crude protein ration and Treatment 2 (control group) was not supplemented. All treatments were given a basal ration of alfalfa (2.5% BW) and offered salt cedar. Salt cedar intake increased (P<0.05) on a daily basis in both treatments. Protein supplementation did not affect salt cedar intake. Alfalfa intake was similar between treatments. Both treatments gained weight during the study. Collectively, the results of this study suggest that goats will readily consume salt cedar, and protein supplementation has little apparent effect on salt cedar intake.Item Development of functional multivitamin microcapsule to be utilized in a ready-to-eat meat product.(2011-05-25T18:29:06Z) Foote, Kaci L.; Foote, Kaci Lee; Musgrove,Laurence E.; Thompson, Leslie D.; Branham, Loree A.; Braden, Kirk W.; Angelo State University. Department of Agriculture.The objective of this study was to develop a multivitamin microcapsule to be utilized in a ready-to-eat (RTE) meat product. Commercial (COM) and laboratory (LAB) multivitamin microcapsules were implemented in a standard frankfurter formulation to produce a functional food. The control (CON) treatment consisted of the standard frankfurter formulation.Two trials (n = 20 / treatment / trial) were evaluated for sensory characteristics using a trained sensory panel and thiamine levels using high performance liquid chromatography (HPLC). While treatment did not have an effect on evaluated sensory characteristics (P > 0.05), an increase in display day (dd) aging increased cooking loss in Trial A. However, in Trial B, LAB and COM treatments had higher cooking loss (P < 0.0001) than CON; average initial juiciness scores increased depending on treatment (P = 0.04). Average initial and sustained tenderness in Trial B was dependent on dd with tenderness increasing throughout the aging intervals (P < 0.0001, 0.0002, respectively). Flavor intensity and off-flavor were not dependent on treatment or dd (P > 0.05) for both trials. In Trial A, overall acceptability was dependent on dd (P = 0.0004) with values ranging from a high in dd 1 (7.12 0.10) to a low in dd 16 (6.47 0.10). In Trial B, there were no differences in overall acceptability (P > 0.05). Thiamine levels were independent of trt, dd and trt x dd when analyzed by HPLC. Multivitamin microcapsule treatments did not have an effect on sensory characteristics when added to ready-to-eat meat products. Thus, multivitamin microcapsules may be added to frankfurter formulations to increase functional properties without adverse affects on sensorial properties.Item A comparison of semen thawing for artificial insemination in cattle.(2011-05-26T18:13:05Z) Kaczyk, Brittni L.; Kaczyk, Brittni Lanay; Serrano, Gabriela I.; May, Brain J.; Scott, Cody B.; Salisbury, Michael W.; Angelo State University. Department of Agriculture.Beef cows (n=23) were used to compared conception rates of two different thawing methods used for artificial insemination (AI). Cows were divided into the treatment or control group based on time of estrus. In the treatment, frozen semen was placed directly into the AI gun and inserted into the female for deposition after a minimum of 30 seconds. The control females experienced the typical thawing process of semen straws placed in a water bath for a minimum of 30 seconds, then loaded into the AI gun and deposited into the uterus of the female. Conception rates were similar between semen thawing methods (P > 0.51). Additionally, the study analyzed semen motility using the two different thaw methods and found no difference (P = 1.0). In conclusion, thawing semen directly in the reproductive tract of the female provides the same conception rates as traditional thaw methods.Item Conception rate differences in sexed vs. non-sexed semen(2011-06-21T22:18:13Z) Brooks, Kayla L.; Brooks, Kayla Lynn; Salisbury, Michael; Ammerman, Loren; Engdahl, Gil; May, Brian; Angelo State University. Department of Agriculture.The objective of this study was to determine if sexed semen has similar conception rates as non-sexed semen. Eighty-four Angus females from the Angelo State University’s Management, Instruction and Research Center were synchronized at the beginning of this study; however, only 54 showed signs of estrus and were artificially inseminated (10 Heifers and 44 multiparous cows). The 54 females were split randomly into three different treatment groups. Heifers and cows in treatment one were inseminated with Y-bearing sexed semen. Females in treatment two were inseminated with X-bearing sexed semen; while the last treatment was our control which received non-sexed semen. Results in heifers and cows were similar, and no differences were noted among the three treatment groups (P>0.5). Differences might be noted with a larger number of females. Date of parturition was estimated using ultrasound, and is a viable management tool because it is possible to predict, on average, within 9 days of parturition with a 36 day maximum and an exact prediction for the minimum.Item Prevalence of antibiotic resistant pathogens in feral hogs of Texas(2011-08-29T13:37:46Z) Nevins, Jaron W.; Nevins, Jaron W.; Branham, Loree A.; Salisbury, Michael W.; Runia, Robin; Scott, Cody B.; Angelo State University. Department of Agriculture.Fecal samples from feral hogs were collected (n=36) from four locations in Texas including Runnels, Haskell, Crane, and Sutton counties. Samples were analyzed for Escherichia coli populations, Salmonella spp. and Listeria spp. prevalence, and bacterial isolates were collected. Commercial microbroth dilution plates were used to establish antibiotic resistant profiles on the isolates. Non‐type specific E. coli was found in 91.7% of total samples (n=36) with isolates exhibiting the most common resistance (n=132 isolates) to Sulfisoxazole (46.2%), Tetracycline (2.2%), and Nalicixic acid (2.5%). Salmonella spp. was found in 27.7% of total samples with isolates (n=37) showing the most common resistance to Sulfisoxazole (29.7%) and Cefoxitin (2.7%). Listeria spp. was found in 22.2% of total samples with isolates (n=29) exhibiting the most common resistance to Lincomycin (89.6%), Daptomycin (68.9%), and Streptomycin (44.8%). This study provides evidence that feral hogs do harbor resistant pathogens that could be foodborne given the right opportunity. ivItem Den site selection of ringtails (Bassariscus Astutus) in West Central Texas(2011-08-29T15:37:43Z) Tiedt, Andrew R.; Tiedt, Andrew R.; Dowler, Robert C.; McCoy, J. Kelly; Maxwell, Terry C.; Braden, Kirk W.; Angelo State University. Department of Agriculture.Research was conducted to determine ringtails (Bassariscus astutus) den site preferences in west central Texas. From August 2008 ‐ November 2009, 13 ringtails (8 females; 5 males) were captured and radio‐collared in Tom Green and Irion Counties, Texas. Ringtails were found using owl nest boxes and natural dens at the study site. Two hundred and eighty‐six dens were located, of which 105 were unique. Thirtyseven instances of den site co‐occupancy by multiple ringtails were recorded. Dataloggers were used to characterize thermal profiles of known dens and controls from October 2008 – October 2009. Den selection for male and female ringtails revealed nest box preference more frequently in the winter (80%) followed by spring (77%), fall (67%), and summer (30%). Den types (nest boxes, below‐ground dens, above‐ground dens) selected were significantly different (χ2=45.3, df=6, P<0.000). Seasonal den type selection was significant for female (χ2=37.0, df=6, P<0.000) and male ringtails (χ2=22.5, df=6, P<0.001).Item Effects of feeding high energy supplements pre and post breeding on estrus and conception of spring calving heifers(2012-01-19) Coley, Allison; Coley, Allison; Salisbury, Michael W.; Scott, Cody B.; May, Brian J.; Simmons, D. Jake; Angelo State University. Department of Agriculture.The objectives of this study were to evaluate the feeding a high energy supplementation and its effects on estrus and conception rates in Angus heifers. Treatments were 1 a control group with water and wheat pasture ad libitum and 2 diet fed once daily containing 70% Sorghum Grain, 10% Cotton Seed Meal, 17% Alfalfa pellets and 3% Cane Molasses at 2.72 kg per head with water and sudan grass hay ad libitum. Treatment 1 consisted of 16 Angus heifers and Treatment 2 consisted of 15 Angus heifers randomly allocated. The 2-shot Lutalyse method was used to synchronize estrus and Heat Watch® sensors were attached. Treatment (2) received a high energy diet during entire breeding process, and two weeks post breeding. No significant differences between treatments were observed for estrus or conception rates (P ≤ 0.05). Pre and post experiment body condition score (BCS) and body weight (BW) between the two treatments were similar. Therefore the feed treatment (Treatment 2) had no effect on reproductive performance in Angus heifers.Item Millennial assessment of credibility among news sources(2012-05-12) Phinney, Jayna; Phinney, Jayna; Wahl, Shawn; Smith, June; Dewar, David; Boone, Jeff; Angelo State University. Department of Communication, Mass Media and Theatre.With so many types of news sources available on the Web, this study sought to examine where those in the millennial generation are turning for credible news and how they are assessing the credibility of that news. A total of 207 participants were asked to use the Web as they would naturally to find news information about a given topic. They were asked to print out a source that they deemed credible, and then complete a questionnaire about their news source and their news consuming habits. The majority of participants turned to the websites of traditional news media sources for information. When evaluating the credibility of their source, participants valued from most to least: type of source, organization of the information, type of information, depth of information, reputation, and presentation. No correlations were found between credibility scores and the frequency of news consumption.Item Determining the profitablity of multiple species livestock enterprise budgets within West Texas(2012-05-12) Bulter, Molly; Butler, Molly Ruth; Howry, Sierra S.; Salisbury, Michael W.; Scott, Cody B.; Wahl, Shawn T.; Angelo State University. Department of Agriculture.For several decades, multiple species stocking has been accepted as an effective and efficient practice in the ranching industry of west Texas. Benefits include exploitation of multiple markets, flexibility to adjust to those markets, maximum utilization of forage diversity, and sustained productive health of the improved pasture. This investigation was designed to assess the potential profit represented in different combinations, while accounting for extensive variability through the analysis of a series of enterprise budgets. Results indicate that a multiple species cow-calf and commercial range sheep combination enterprise generates the highest profitability. Sensitivity analysis was also conducted to show how volatile an enterprise can be to market fluctuations both low and high.Item Lynching on the border: the death of Antonio Rodriguez and the rise of anti-Americanism during the Mexican Revolution(2012-05-12) Taylor, Travis; Taylor, Travis; DeLeon, Arnoldo; Hindman, James; Eoff, Shirley; Hack, Teresa; Angelo State University. Department of History.This thesis examines the lynching of Antonio Rodríguez along with the incident’s aftermath. Analysis interjects the narrative at crucial points throughout, and especially in chapter conclusions. The use of a transnational historical framework attempts to explain the intricacies of both nations’ diplomatic efforts. Similarly, both Mexican and American newspapers are used to stress differences in the respective publics’ opinion of events. Historians have often described the lynching of Antonio Rodríguez as an isolated incident, and one relegated to the sidelines of history as the Mexican Revolution unfolded. This thesis aims to reassess the significance of Rodríguez’s death, suggesting that the incident became a symbol of the failure of President Porfirio Díaz to provide for his citizens (at home and abroad). Furthermore, Rodríguez’s murder was not subsumed into the greater event of the Mexican Revolution; rather, the death of Antonio Rodríguez altered the initial phase of the Mexican Revolution.Item Exploring direct and indirect antecedents of self-reported ecological behaviors(2012-05-12) Weber, Alisa; Weber, Alisa Jeannette; Stenmark, Cheryl; Schell, Kraig; Cordell-McNulty, Kristi; Purkiss, Christine; Angelo State University. Department of Psychology, Sociology and Social Work.The current study examined the direct and indirect antecedents of participation in ecological behavior. Specifically, it was hypothesized that promotion and prevention orientation would both significantly predict ecological behavior, and that hope and optimism would partially mediate these relationships. The results revealed that a promotion orientation significantly predicted pro-social behavior, but the hypothesized mediation was not significant. However, post-hoc analyses revealed that hope predicted pro-social behavior and that the relationship was mediated by a promotion orientation. Implications, limitations, and directions for future research are also discussed.