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Articles 421 - 450 of 590
Full-Text Articles in Animal Sciences
Impact Of Repeated Out-Of-Feed Events And Fineness Of Grind On Grow-Finish Performance, Mike Brumm, Sheryl Colgan
Impact Of Repeated Out-Of-Feed Events And Fineness Of Grind On Grow-Finish Performance, Mike Brumm, Sheryl Colgan
Nebraska Swine Reports
Out-of-feed events are a growing problem in nursery and grow-finish facilities due to issues associated with feed delivery to bulk bins and bridging of feed in bulk bins. Reports of bridging are increasing as producers continue to reduce the fineness of grind for complete diets in order to improve feed conversion. A study was conducted to examine the effect of repeated out-of-feed events and diet particle size on barrow performance in a wean-to-finish facility beginning six weeks after weaning. Corn-soybean meal based diets were either coarse (1,266 microns) or medium ground (1,019 microns) for the duration of the experiment. Within …
Effects Of Feeding Increased Levels Of Vitamin B12 To Weanling Pigs, Laura Albrecht, Robert Fischer, Phillip S. Miller
Effects Of Feeding Increased Levels Of Vitamin B12 To Weanling Pigs, Laura Albrecht, Robert Fischer, Phillip S. Miller
Nebraska Swine Reports
Increasing concentrations of vitamin B12 were fed to 144 weanling pigs (weaned 13-14 days) in two, five-week trials. Pigs were fed one of six diets: NC, negative control, basal diet without supplemented vitamin B12; or the basal diet with the inclusion of 100% (1X, 7.94 μg/lb), 200% (2X, 15.87 μg/lb), 400% (4X, 31.75 μg/lb), 800% (8X, 63.49 μg/lb), or 1,600% (16X, 126.98 μg/lb) of NRC requirements for the 11- to 22-lb pig. Each trial was divided into two phases: phase 1, day 0 - day 14 and phase 2, day 14 - day 35. Throughout phase 1, …
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 7 2006, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 7 2006, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Instructions For Authors, Discovery Editors
Instructions For Authors, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker
Suspension Of Gametogenesis In Green Sea Urchins Experiencing Invariant Photoperiod, S. Anne Boettger, Michael G. Devin, Charles W. Walker
Biology Faculty Publications
No abstract provided.
The Karyotypes Of Some Rodent Species (Mammalia: Rodentia) From Eastern Turkey And Northern Iran With A New Record, Microtus Schidlovskii Argyropulo, 1933, From Eastern Turkey, Nuri̇ Yi̇ği̇t, Muhammed Mouradi Gharakheloo, Ercüment Çolak, Şaki̇r Özkurt, Şafak Bulut, Tolga Kankiliç, Reyhan Çolak
The Karyotypes Of Some Rodent Species (Mammalia: Rodentia) From Eastern Turkey And Northern Iran With A New Record, Microtus Schidlovskii Argyropulo, 1933, From Eastern Turkey, Nuri̇ Yi̇ği̇t, Muhammed Mouradi Gharakheloo, Ercüment Çolak, Şaki̇r Özkurt, Şafak Bulut, Tolga Kankiliç, Reyhan Çolak
Turkish Journal of Zoology
During a field excursion in eastern Turkey and the Zanjan province of Iran, 9 rodent species were captured, and the diploid number of chromosomes (2n), the number of autosomal arms (FNa) and the fundamental number (FN) were determined for these species. Microtus schidlovskii with 2n = 60 and FNa = 58 was recorded for the first time from Özalp (Van) and Yüksekova (Hakkari). The karyological record of Meriones vinogradovi in Turkey was also given for the first time. The karyological results were determined as follows: Spermophilus xanthophrymnus (2n = 42, FNa = 78, FN = 82 in Turkey), Mesocricetus brandti …
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Initial Evaluation Of Novel Preparations Of Bordetella Avium By Determination Of Antibody Response Titers, Joel Gallagher, Stacy Higgins, Luc Berghman, Billy Hargis
Initial Evaluation Of Novel Preparations Of Bordetella Avium By Determination Of Antibody Response Titers, Joel Gallagher, Stacy Higgins, Luc Berghman, Billy Hargis
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The efficacy of killed vaccines generally is not equal to live vaccines. However, due to safety and ease of production, they remain a vital part of controlling and preventing diseases. In this study, the immune response to four different vaccination preparation techniques for the agent of bordetellosis of turkeys, Bordetella avium (BA), was compared. Preparation/inactivation techniques included (1) formalin inactivation, (2) opsonization of formalin-inactivated BA, (3) buffered acetic-acid BA inactivation, or (4) opsonization of buffered acetic-acid-inactivated BA. Non-adjuvated suspensions containing equal antigen mass were administered subcutaneously (0.2 mL) at day-of-hatch in all cases. For each treatment (N=40/treatment), plasma samples were …
Associative Memory In Three Aplysiids: Correlation With Heterosynaptic Modulation, Brian A. Hoover, Hoang Nguyen, Laura Thompson, William G. Wright
Associative Memory In Three Aplysiids: Correlation With Heterosynaptic Modulation, Brian A. Hoover, Hoang Nguyen, Laura Thompson, William G. Wright
Biology, Chemistry, and Environmental Sciences Faculty Articles and Research
Much recent research on mechanisms of learning and memory focuses on the role of heterosynaptic neuromodulatory signaling. Such neuromodulation appears to stabilize Hebbian synaptic changes underlying associative learning, thereby extending memory. Previous comparisons of three related sea-hares ( Mollusca, Opisthobranchia) uncovered interspecific variation in neuromodulatory signaling: strong in Aplysia californica, immeasureable in Dolabrifera dolabrifera, and intermediate in Phyllaplysia taylori. The present study addressed whether this interspecific variation in neuromodulation is correlated with memory of associative ( classical conditioning) learning. We differentially conditioned the tail-mantle withdrawal reflex of each of the three species: Mild touch to one side of the tail …
Of Fish And People: Managerial Ecology In Newfoundland And Labrador Cod Fisheries, Dean Louis Yelwa Bavington
Of Fish And People: Managerial Ecology In Newfoundland And Labrador Cod Fisheries, Dean Louis Yelwa Bavington
Theses and Dissertations (Comprehensive)
This dissertation aims to understand the history of, and possible alternatives to, managerial responses to socio-ecological issues by examining one of the largest natural resource management failures of the twentieth century—the collapse of the Northern cod fisheries off Newfoundland and Labrador, Canada. In 1992, the Northern cod fishery off Newfoundland and Labrador (the world's largest ground fishery) was shut down. The Northern cod had been reduced to 1% of their historic spawning biomass and cod fishing as a way of life had come to an end after a 500 year history. The dissertation develops and applies a critical theory of …
Gamete And Cell Technologies For Use In Biological Resource Banking, Liesl Nel-Themaat
Gamete And Cell Technologies For Use In Biological Resource Banking, Liesl Nel-Themaat
LSU Doctoral Dissertations
Biological resource banking is becoming important for endangered species conservation. A series of experiments were conducted to address issues concerning collection and utilization of biomaterials from Gulf Coast Native (GCN) sheep (model species) (Ovis aries) and Eland antelope (Taurotragus oryx). In the first experiment, two ejaculates were collected 10 minutes apart from each of five rams three times a week for three weeks to maximize output and minimize handling time. Semen volume, concentration and total number of spermatozoa were significantly greater in first ejaculates, whereas pre-cooled, cooled and post-thaw motility, as well as sperm survival, were greater in second ejaculates. …
A New Record For The Turkish Pseudoscorpion Fauna; Lamprochernes Savignyi (Simon, 1881) (Arachnida, Pseudoscorpionida), Fati̇h Sezek, Muhli̇s Özkan
A New Record For The Turkish Pseudoscorpion Fauna; Lamprochernes Savignyi (Simon, 1881) (Arachnida, Pseudoscorpionida), Fati̇h Sezek, Muhli̇s Özkan
Turkish Journal of Zoology
The morphological features of species, and adult and developmental stages of Lamprochernes savignyi (Simon, 1881), newly recorded for the Turkish Pseudoscorpion fauna, are given.
Distributional Notes On Northeastern Algerian Hydrophilidae (Coleoptera), With Three New Records, Slimane Bouzid, Ümi̇t İncekara
Distributional Notes On Northeastern Algerian Hydrophilidae (Coleoptera), With Three New Records, Slimane Bouzid, Ümi̇t İncekara
Turkish Journal of Zoology
Distributional notes on some Northeastern Algerian Hydrophilidae species are given. Three newly recorded species (Anacaena limbata (Fabricius, 1792), Hydrobius fuscipes (Linnaeus, 1758), and Hydrophilus piceus (Linnaeus, 1758)) are described, and their distributions in Algeria and worldwide are presented.
Reproduction Properties Of Pike (Esox Lucius L., 1758) Population In Lake Karamık (Afyonkarahisar/Turkey), İsmet Balik, Hidir Çubuk, Remzi̇ye Özkök, Rahmi̇ Uysal
Reproduction Properties Of Pike (Esox Lucius L., 1758) Population In Lake Karamık (Afyonkarahisar/Turkey), İsmet Balik, Hidir Çubuk, Remzi̇ye Özkök, Rahmi̇ Uysal
Turkish Journal of Zoology
In this study, the spawning period, length at first sexual maturity and fecundity of the pike (Esox lucius L., 1758) population in Lake Karamık between March 2002 and February 2003 were investigated. Mean length at first reproduction (L_m) was determined as 19.7 cm for female pike. The monthly values of the gonadosomatic index indicated that spawning occurred between February and March. The relative fecundity was determined as 45.7 ± 4.9 eggs g^{-1} total body weight. Fecundity (F) - fork length (L) and Fecundity - weight (W) relationships were estimated as F = 2.8963 L^{2.3722} (r = 0.590) and F = …
Two New Records Of Hydrophilid (Coleoptera: Hydrophilidae) Species Of The Turkish Fauna, Abdullah Mart, Ümi̇t İncekara, Rüstem Hayat
Two New Records Of Hydrophilid (Coleoptera: Hydrophilidae) Species Of The Turkish Fauna, Abdullah Mart, Ümi̇t İncekara, Rüstem Hayat
Turkish Journal of Zoology
Two newly recorded Hydrophilid species (Water Beetles) of the Turkish fauna, Hydrobius arcticus Kuwert, 1890 and Coelostoma (Lachnocoelostoma) transcaspicum Reitter, 1906 were compared with the specimens in our department's laboratory, and their distribution in Turkey and worldwide is given.
A System For Wintering Beef Heifers Using Dried Distillers Grains, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein
A System For Wintering Beef Heifers Using Dried Distillers Grains, Leslie Aaron Stalker, Don C. Adams, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
A two-year experiment compared two systems for wintering pregnant heifers. The standard system used by the ranch served as the control (CON) and the treatment system (TRT) included a dried distillers grains based supplement. Heifers in the TRT system were heavier and had greater body condition score at end of supplementation. Calving difficulty, percentage of live calves weaned and subsequent pregnancy rate were similar between systems. Calves born to heifers in the TRT system were heavier at birth and weaning. The TRT system cost $10.47/heifer less than the CON system and resulted in equivalent or improved heifer and calf growth …
Feeding Melengestrol Acetate To Bulls Prior To And At Puberty Alters Body Weight, And Hormone Concentration, April Tefler, Ryann Mcfee, Rebecca C. Bott, Joseph Schulz, Debra T. Clopton, Jeffrey W. Bergman, Karl V. Moline, Kathy Hanford, Andrea S. Cupp
Feeding Melengestrol Acetate To Bulls Prior To And At Puberty Alters Body Weight, And Hormone Concentration, April Tefler, Ryann Mcfee, Rebecca C. Bott, Joseph Schulz, Debra T. Clopton, Jeffrey W. Bergman, Karl V. Moline, Kathy Hanford, Andrea S. Cupp
Nebraska Beef Cattle Reports
Melengestrol acetate (MGA), which is commonly used in the beef industry to manipulate ovarian activity of females, was fed to bulls at two times during development, prepubertal (5.5 to 7.5 months) and peri-pubertal (6.5 to 9.5 months), to determine effects on testes size, scrotal circumference, body weight, and/or hormone production. We can conclude that feeding bulls MGA during the prepubertal and peri-pubertal time can alter body weight and testosterone production.
Digestibility Of Undegradable Intake Protein Of Feedstuffs, Joshua R. Benton, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams
Digestibility Of Undegradable Intake Protein Of Feedstuffs, Joshua R. Benton, James C. Macdonald, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams
Nebraska Beef Cattle Reports
Digestibility of undegradable intake protein of subirrigated meadows, upland native range, smooth bromegrass, and other feedstuffs used in several growing trials was measured using the mobile nylon bag technique. In general, as the grazing season progressed, undegradable intake protein (UIP) digestibility of grazed forages decreased. Also, UIP digestibility was highly variable among feedstuffs. Compared to the constant 80% digestibility of UIP used by the 1996 Beef NRC, grazed and harvested forages tend to have much lower UIP digestibility values while the supplemental protein sources evaluated tend to have higher UIP digestibility values.
Economic Optimum Use Of Wet Distillers Grains In Feedlots, Kyle J. Vander Pol, Galen E. Erickson, Terry J. Klopfenstein, Darrell R. Mark
Economic Optimum Use Of Wet Distillers Grains In Feedlots, Kyle J. Vander Pol, Galen E. Erickson, Terry J. Klopfenstein, Darrell R. Mark
Nebraska Beef Cattle Reports
An economic analysis was conducted using feedlot performance, current feed ingredient prices, trucking, and cost of feeding inputs to determine economics of feeding wet distillers grains plus solubles (WDGS) at five dietary inclusions. The analysis also incorporated positive corn basis into the model. Cattle returns are greatest when incorporated WDGS is fed at 30 to 40% of DM at feedlots located between 0 and 60 miles from the plant. As distance of the feedlot increases from 60 to 100 miles from the plant, optimum inclusion is between 20 and 30% of dietary DM. Either a 5 or 10 cent positive …
Growth Promoting Agents And Season Effects On Blood Metabolite And Body Temperature Measures, Terry L. Mader, Wanda Kreikemeier
Growth Promoting Agents And Season Effects On Blood Metabolite And Body Temperature Measures, Terry L. Mader, Wanda Kreikemeier
Nebraska Beef Cattle Reports
To assess growth promoting agents efficacy among seasons, triiodothyronine, thyroxine, blood metabolites, and tympanic temperature were measured in summer and winter studies. Within each season, pens of heifers were assigned to one of six growth promotant treatments. Season by growth promotant treatment interactions (P < 0.05) indicated that the combination of estrogen and trenbolone acetate increased triiodothyronine in the winter, whereas trenbolone acetate alone decreased both triiodothyronine and thyroxine in the winter. Maximum tympanic temperature was greater (P < 0.01) in the summer than in the winter, while minimum tympanic temperature was lowered (P < 0.01) in the summer. Changes in blood metabolite levels resulting from the use of growth promotants do not appear to substantially influence seasonal changes in body temperature.
Inhibition Of Methanogenesis In Rumen Fluid Cultures, Eric Behlke, Razvan Dumitru, Stephen Ragsdale, James M. Takacs, Jess L. Miner
Inhibition Of Methanogenesis In Rumen Fluid Cultures, Eric Behlke, Razvan Dumitru, Stephen Ragsdale, James M. Takacs, Jess L. Miner
Nebraska Beef Cattle Reports
We identified 32 compounds that inhibit 13 to 100% of the methane produced by in vitro cultures of rumen fluid and have the potential to inhibit enteric methanogenesis in ruminant animals. The compounds are analogous to a substrate in the methane biosynthesis pathway, and may inhibit methane production yet not affect other organisms in the rumen.
Livestock Risk Protection Insurance Vs. Futures Hedging: Basis Risk Implications, Rik R. Smith, Darrell R. Mark, Allen L. Prosch
Livestock Risk Protection Insurance Vs. Futures Hedging: Basis Risk Implications, Rik R. Smith, Darrell R. Mark, Allen L. Prosch
Nebraska Beef Cattle Reports
This study analyzes the benefit of Livestock Risk Protection (LRP) insurance to cattle producers in reducing basis risk. Nebraska producers insuring fed cattle with LRP realize a basis risk reduction of one-third to one-half compared to futures or options hedging. Nebraska feeder cattle producers using LRP experience only a slight reduction in basis risk. Reduced basis risk results in smaller errors when forecasting basis levels for future time periods. With more accurate basis forecasts, producers can better estimate net hedged selling prices and, consequently, future cash flows.
Managing Phosphorus In Beef Feedlot Operations, William F. Kissinger, Galen E. Erickson, Terry J. Klopfenstein, Richard K. Koelsch
Managing Phosphorus In Beef Feedlot Operations, William F. Kissinger, Galen E. Erickson, Terry J. Klopfenstein, Richard K. Koelsch
Nebraska Beef Cattle Reports
A commercial feedlot study determined manure nutrient flow in six feedlots using a corn and by-product based diet with an average P content of 0.39% (DM basis), and a range of 0.34 to 0.48%. Mass balances for N and P were conducted on each pen. The average feed nutrient intake was 0.52 lb N/head/day (64.0 + 7.6 lb/animal fed) and 0.09 lb P/head/day (10.9 + 2.2 lb/animal fed). Based upon averages from the 6,366 head of cattle, 11.5% of the feed nitrogen and 16.9% of the feed phosphorus were retained by the animal with the remaining nutrients excreted. The harvested …
The Influence Of Cooking Rate And Holding Time On Beef Flavor, Jennie M. James, Chris R. Calkins
The Influence Of Cooking Rate And Holding Time On Beef Flavor, Jennie M. James, Chris R. Calkins
Nebraska Beef Cattle Reports
Seven muscles from 10 beef carcasses were cooked quickly or slowly and held 0 or 1 hour to explore the influence of cooking rate and holding time on beef flavor. Off-flavor intensity was lowest when beef was cooked slowly (on a 300°F grill instead of a 480°F grill) and when it was held for 1 hour prior to sensory evaluation. The infraspinatus (flat iron) had the least intense off-flavor and the vastus intermedius (knuckle bottom) had the most intense off-flavor. Slow cooking or holding for 1 hour prior to consumption reduced the intensity of off-flavor in value cuts.
Wet Distillers Grains Plus Solubles Do Not Increase Liver-Like Off-Flavors In Cooked Beef, Blaine Jenschke, Jennie James, Kyle Vander Pol, Chris R. Calkins, Terry J. Klopfenstein
Wet Distillers Grains Plus Solubles Do Not Increase Liver-Like Off-Flavors In Cooked Beef, Blaine Jenschke, Jennie James, Kyle Vander Pol, Chris R. Calkins, Terry J. Klopfenstein
Nebraska Beef Cattle Reports
Crossbred steers fed with varying levels of wet distillers grains to test the incidence of liver-like off-flavors. USDA Choice steaks, when compared to USDA Select, had significantly higher trained sensory muscle fiber tenderness scores, less detectable connective tissue, higher juiciness scores, and more intense off-flavor ratings. USDA Choice steaks had a higher percentage of panelists denote liver-like and metallic off-flavors. Wet distillers grains did not significantly influence off-flavor indicating these by-products can be used to finish cattle without causing detrimental effects on the sensory profile.
Leeches (Annelida: Hirudinida) Of Northern Arkansas, William E. Moser, Donald J. Klemm, Dennis J. Richardson, Benjamin A. Wheeler, Stanley E. Trauth, Bruce A. Daniels
Leeches (Annelida: Hirudinida) Of Northern Arkansas, William E. Moser, Donald J. Klemm, Dennis J. Richardson, Benjamin A. Wheeler, Stanley E. Trauth, Bruce A. Daniels
Journal of the Arkansas Academy of Science
Twenty-one lotic and lentic environments throughout central and northern Arkansas were surveyed for the presence of leeches during June 2004 and April, July - October 2005. Fourteen species of leeches {Helobdella elongata, Helobdella papillata, Helobdella stagnalis, Placobdella cryptobranchii, Placobdella multilineata, Placobdella ornata, Placobdella papillifera, Placobdella parasitica, Placobdella phaler a, Placobdella picta, Haemopis marmorata, Erpobdella fervida, Erpobdella microstoma, and Erpobdella punctata) representing 3 families were collected. Five species (H. elongata, P. cryptobranchii, P. multilineata, H. marmorata, and E. fervida) are reported from Arkansas for the first time. The natural history of the 22 species of leeches now known from Arkansas is …
Discovery Of A Dicephalic Western Diamondback Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), From Texas, With A Summary Of Dicephalism Among Members Of The Genus Crotalus, Chris T. Mcallister, Van Wallach
Discovery Of A Dicephalic Western Diamondback Rattlesnake, Crotalus Atrox (Serpentes: Viperidae), From Texas, With A Summary Of Dicephalism Among Members Of The Genus Crotalus, Chris T. Mcallister, Van Wallach
Journal of the Arkansas Academy of Science
We document the fourth record of a dicephalic western diamondback rattlesnake, Crotalus atrox, collected on 17 September 2005 in Tom Green County, Texas, along with features of its external and internal anatomy, which are compared with normal C. atrox neonates. This is only the second reported case of complete anatomical duplication of the respiratory system and nearly complete duplication of the circulatory and digestive systems in dicephalic snakes. In addition, we present a summary of dicephalism among 10 species within the genus Crotalus.
Geographic Distribution And Harvest Dynamics Of The Eastern Spotted Skunk In Arkansas, D. Blake Sasse, Matthew E. Gompper
Geographic Distribution And Harvest Dynamics Of The Eastern Spotted Skunk In Arkansas, D. Blake Sasse, Matthew E. Gompper
Journal of the Arkansas Academy of Science
The eastern spotted skunk (Spilogale putorius) is a small carnivore found across much of the central and southeastern United States, and while once common, this species has become rare in most obits range. We used harvest records collected by the Arkansas Game and Fish Commission from 1941-2004 to examine historic and current distribution and long-term harvest dynamics of this species in Arkansas. Eastern spotted skunks have historically been most common in the Ozarks and the Ouachitas though the species appears to have been present, but uncommon, in the Gulf Coastal Plain and in some counties in southeastern Arkansas near the …
New Evidence For A Maternity Colony Of The Indiana Bat (Myotis Sodalis) In The Delta Of Arkansas, Stephen C. Brandebura, Rex E. Medlin Jr., Thomas S. Risch
New Evidence For A Maternity Colony Of The Indiana Bat (Myotis Sodalis) In The Delta Of Arkansas, Stephen C. Brandebura, Rex E. Medlin Jr., Thomas S. Risch
Journal of the Arkansas Academy of Science
No abstract provided.
Unusual Prey Item Found In An Eastern Bluebird Nest, Sarah De Viney Baxter, Richard J. Baxter, Thomas S. Risch
Unusual Prey Item Found In An Eastern Bluebird Nest, Sarah De Viney Baxter, Richard J. Baxter, Thomas S. Risch
Journal of the Arkansas Academy of Science
No abstract provided.