The Mayfly Newsletter, 2017 The Permanent Committee of the International Conferences on Ephemeroptera
The Mayfly Newsletter, Donna J. Giberson
The Mayfly Newsletter
No abstract provided.
Intraocular Sparganosis (Platyhelminthes: Cestoda: Pseudophyllidea: Diphyllobothriidae) In The Green Tree Snake Dendrelaphis Punctulatus (Serpentes: Colubridae: Colubrinae)., 2017 Avondale College of Higher Education
Intraocular Sparganosis (Platyhelminthes: Cestoda: Pseudophyllidea: Diphyllobothriidae) In The Green Tree Snake Dendrelaphis Punctulatus (Serpentes: Colubridae: Colubrinae)., Terence J. Annable, Dean C. Metcalfe
Sparganosis is a parasitic condition found almost on a worldwide scale that can infest fish, amphibians, reptiles, birds and mammals. In the case described a green tree snake was found to have a dormant intraocular parasite (sparganum) leading to glaucoma and blindness. The first intermediate host is a small aquatic crustacean, commonly Cyclops. Animals can become second intermediate hosts when they ingest contaminated water. The parasite encysts as a sparganum usually forming a small lump under the skin that may remain dormant for many years. The definitive hosts for these parasitic tapeworms are carnivorous mammals such as cats, dogs or ...
A New Species Of The “Apacheanus” Group Of Genus Pseudouroctonus From Western Texas (Scorpiones: Vaejovidae), Richard F. Ayrey, Michael E. Soleglad
A new species of the “apacheanus” group of genus Pseudouroctonus is described from western Texas, USA, Pseudouroctonus brysoni, sp. nov. This new species is closely related to P. apacheanus (Gertsch et Soleglad, 1972) and two other species recently described from southern Arizona. A combination of morphological differences in the hemispermatophore, the mating plug, and several morphometric-based characters are identified as diagnostic.
Cognition-Mediated Evolution Of Low-Quality Floral Nectars, 2017 Humboldt University, Berlin
Cognition-Mediated Evolution Of Low-Quality Floral Nectars, Vladislav Nachev, Kai Petra Stich, Clemens Winter, Alan B. Bond, Alan Kamil, York Winter
Alan Bond Publications
Plants pollinated by hummingbirds or bats produce dilute nectars even though these animals prefer more concentrated sugar solutions. This mismatch is an unsolved evolutionary paradox. Here we show that lower quality, or more dilute, nectars evolve when the strength of preferring larger quantities or higher qualities of nectar diminishes as magnitudes of the physical stimuli increase. In a virtual evolution experiment conducted in the tropical rainforest, bats visited computer-automated flowers with simulated genomes that evolved relatively dilute nectars. Simulations replicated this evolution only when value functions, which relate the physical stimuli to subjective sensations, were nonlinear. Selection also depended on ...
Transcriptomes Of Bovine Ovarian Follicular And Luteal Cells, 2017 University of Nebraska-Lincoln
Transcriptomes Of Bovine Ovarian Follicular And Luteal Cells, Sarah Romereim, Adam Summers, William E. Pohlmeier, Pan Zhang, Xiaoying Hou, Heather Talbott, Robert A. Cushman, Jennifer R. Wood, John S. Davis, Andrea S. Cupp
Faculty Papers and Publications in Animal Science
Affymetrix Bovine GeneChip® Gene 1.0 ST Array RNA expression analysis was performed on four somatic ovarian cell types: the granulosa cells (GCs) and theca cells (TCs) of the dominant follicle and the large luteal cells (LLCs) and small luteal cells (SLCs) of the corpus luteum. The normalized linear microarray data was deposited to the NCBI GEO repository (GSE83524). Subsequent ANOVA determined genes that were enriched (≥2 fold more) or decreased (≤−2 fold less) in one cell type compared to all three other cell types, and these analyzed and filtered datasets are presented as tables. Genes that were shared in ...
An Evaluation Of Deer And Pronghorn Surveys In South Dakota, 2017 South Dakota State University
An Evaluation Of Deer And Pronghorn Surveys In South Dakota, Kristopher W. Cudmore
Theses and Dissertations
To properly manage white-tailed deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), and the American pronghorn antelope (Antilocapridae americana), wildlife managers must identify population perimeters, sample size, age and sex ratios of these three species. The primary objective of this study was to evaluate age and sex ratios and determine a minimum sample size for each study area for all deer species and pronghorn, in addition to deriving a methodology and population estimate for white-tailed deer in the Black Hills. Sample size needed for both species of deer and pronghorn ranged from 60-70 groups of does. Age ratios calculated from daylight ...
Sandhill And Whooping Cranes, 2017 Private Lands Conservation, LLC
Sandhill And Whooping Cranes, Jeb Barzen, Ken Ballinger
Wildlife Damage Management Technical Series
As sandhill crane populations continue to grow in the United States, so too does crop damage, property damage to homeowners, and the risk of crane collisions with aircraft. Whooping crane populations also continue to grow, but with a global population of about 500 individuals (as of 2017), damage is rare and problems often require different solutions due to the species’ endangered status. The behavioral characteristics and habitat needs of sandhill and whooping cranes set the stage for conflict between these birds and people. Recognizing behavioral differences between territorial and non-territorial cranes greatly improves the effectiveness of any management effort.
Effects Of Phase Feeding During Gestation On Gilt Performance, Offspring Quality And Robustness, 2017 South Dakota State University
Effects Of Phase Feeding During Gestation On Gilt Performance, Offspring Quality And Robustness, Agatha Ampaire
Theses and Dissertations
total of 51 gilts in 6 blocks were randomly assigned to one of 3 feeding regimens: Constant (Constant-f), 2.21 kg/d of a standard diet from breeding to d 112 of gestation (1.7 g Lys/kcal ME; 3276 kcal ME/kg); Bump feeding (Bump-f), the standard diet at 2.21 kg/d from breeding to d 89 and 2.61 kg/d from d 90 - 112; Phase feeding (Phase-f ), 2.21 kg/d from breeding to d 89 (1.5 g Lys/kcal ME; 3275 kcal ME/kg) and 2.61 kg/d from d 90 - 112 (2 ...
J. C. Penney: The Man, The Store And American Agriculture (Under Contract), 2016 University of Wyoming
J. C. Penney: The Man, The Store And American Agriculture (Under Contract), David Kruger
David Delbert Kruger
No abstract provided.
Reef Society And The Tyranny Of Data, 2016 Snorkel Bob's Hawaii
Reef Society And The Tyranny Of Data, Robert Wintner
Animal Sentience: An Interdisciplinary Journal on Animal Feeling
Modern science now approaches divergent processes in many areas, including health assessments of marine eco-systems and social aspects of marine species. Scientific data have long enjoyed a reputation for objectivity but incidents of science-for-hire, data spinning/skewing and political jading are more frequent than ever. In the field of reef creature sensitivity, technical treatises can “logically” explain away what a person of average education can clearly observe on any given reef. Western medicine discounted anecdotal evidence of any cure outside the 4% margin of error until those cures demanded attention and in some cases application. Modern science must now enter ...
Still Wondering How Flesh Can Feel, 2016 Vassar College
Still Wondering How Flesh Can Feel, Gwen J. Broude
Animal Sentience: An Interdisciplinary Journal on Animal Feeling
Reber believes he has simplified Chalmers’s “hard problem” of consciousness by arguing that subjectivity is an inherent feature of biological forms. His argument rests on the related notions of continuity of mind and gradual accretion of capacities across evolutionary time. These notions need to be defended, not just asserted. Because Reber minimizes the differences in mental faculties among species across evolutionary time, it becomes easier to assert, and perhaps believe, that sentience is already present in early biological forms. The more explicit we are about the differences among these mental faculties and the differences across species, the less persuasive ...
The Value Of Third-Party Certification Of Preconditioning Claims At Iowa Feeder Cattle Auctions, 2016 Iowa State University
The Value Of Third-Party Certification Of Preconditioning Claims At Iowa Feeder Cattle Auctions, Harun Bulut, John Lawrence
After controlling a variety of feeder cattle characteristics and market and sale conditions in Iowa feeder auctions, the price premiums for preconditioning claims (vaccinations and minimum 30 days of weaning) with and without third-party certification (TPC) are estimated as $6.12/cwt and $3.35/cwt, respectively. These premiums differ statistically (p < 0.0001), and their difference exceeds the average participation cost of TPC ($l/cwt). This indicates that TPC is valued in the market to credibly signal preconditioning investment under asymmetric information.
U.S. Consumers’ Valuation Of Quality Attributes In Beef Products, 2016 Economic Policy Analysis
U.S. Consumers’ Valuation Of Quality Attributes In Beef Products, Babatunde O. Abidoye, Harun Bulut, John Lawrence, Brian Mennecke, Anthony M. Townsend
A sample of U.S. consumers were surveyed in a choice based experiment in the Fall of 2005 and Spring 2006 to elicit consumers’ preferences for quality attributes in beef products. Based on the resulting data, a random coefficients logit model is estimated, and consumers’ willingness to pay for these quality attributes in beef products is obtained. The results indicate that consumers have strong valuation for traceability, grass-fed, and U.S. origin attributes in a standard rib-eye steak and are willing to pay a premium for these attributes.
Effects Of Stocking Rate And Corn Gluten Feed Supplementation On Performance Of Young Beef Cows Grazing Winter-Stockpiled Tall Fescue-Red Clover Pasture, R. Driskell, J.R. Russell, Daryl R. Strohbehn, Daniel G. Morrical, Stephen K. Barnhart, John Lawrence
A winter grazing experiment was conducted to evaluate the effects of stocking rate and corn gluten feed supplementation on forage mass and composition and the BW and BCS of bred 2-yr-old cows grazing stockpiled forage during winter. Two 12.2-ha blocks containing Fawn, endophyte-free, tall fescue and red clover were each divided into 4 pastures of 2.53 or 3.54 ha. Hay was harvested from the pastures in June and August of 2003 and 2004, and N was applied at 50.5 kg/ha at the initiation of stockpiling in August. On October 22, 2003, and October 20, 2004 ...
Differences In Prices And Price Risk Across Alternative Marketing Arrangements Used In The Fed Cattle Industry, Mary K. Muth, Yanyan Liu, Stephen R. Koontz, John Lawrence
Information on prices and price risk differences across marketing arrangements aids fed cattle producers in making choices about marketing methods. As part of the congressionally mandated Livestock and Meat Marketing Study, we investigated fed cattle price and price risk differences across marketing arrangements. The analysis uses data representing cattle purchased by 29 large beef packing plants from October 2002 through March 2005. Results indicate that marketing agreements offered the best tradeoff between price level and price risk. Forward contracts had the lowest average yet highly volatile prices. Auction barn prices were higher than other methods but also the most volatile.
Feed Grains And Livestock: Impacts On Meat Supplies And Prices, 2016 Iowa State University
Feed Grains And Livestock: Impacts On Meat Supplies And Prices, John Lawrence, James Mintert, John D. Anderson, David P. Anderson
Agriculture in the United States is undergoing a significant change. Grain, oilseed, and land prices have increased significantly, creating a subsequent increase in the income and wealth of many rural Americans—unless you are in animal agriculture. Feed is the largest single cost item for livestock and poultry production, accounting for 60%– 70% of the total cost in most years. Although energy, labor, and other inputs have increased, feed costs have increased anywhere from 40%–60% (depending on the species) in the last two years. As price takers in competitive markets, animal producers cannot simply pass their higher costs on ...
Fundamental Forces Affecting Livestock Producers, 2016 Iowa State University
Fundamental Forces Affecting Livestock Producers, John Lawrence, James Mintert
In a seminal Harvard Business Review article published in 1979, Michael Porter identified five competitive forces that shape industry competition, all of which feed into rivalry among existing competitors. Porter’s framework has most often been applied to industries producing and marketing differentiated products. Conversely, U.S. livestock and milk production still mostly resembles a commodity market with largely undifferentiated products marketed to a processing sector that, based on the Herfindahl-Herschman Index (HHI)-an industry concentration measure based on market shares that is easily computed and compared across industries- and Department of Justice and Federal Trade Commission definitions, is unconcentrated ...
Elements Of Cattle Feeding Profitability In Midwest Feedlots, 2016 Iowa State University
Elements Of Cattle Feeding Profitability In Midwest Feedlots, John Lawrence, Zhi Wang, Dan Loy
Conventional wisdom and earlier research have concluded that cattle feeding profitability is more determined by feeder and fed cattle prices than by animal performance. This study examined cross-sectional and time-series data from over 1600 pens of cattle in more than 220 feedlots in the upper Midwest where weather and lot conditions are thought to influence feedlot profitability. In addition to input and output prices and animal performance, other factors found to significantly impact cattle feeding profitability were sex, placement weight, facility design, and to a lesser extent placement season.
Creating A Geographically Linked Collective Brand For High-Quality Beef: A Case Study, 2016 Iowa State University
Creating A Geographically Linked Collective Brand For High-Quality Beef: A Case Study, Bruce Babcock, Dermot J. Hayes, John Lawrence, Roxanne L. Clemens
Many farmers who produce high-quality products do not use market mechanisms that would allow them to differentiate their products and take the fullest advantage of price premiums. This paper describes a pilot program to develop and commercialize an origin-based collective brand for very high quality US beef. We hypothesized that, by using specific market mechanisms to differentiate the beef, cattle producers might be able to capture a greater share of price premiums often captured elsewhere in the marketing channel. Specifically, the pilot program analyzed the feasibility of two mechanisms for differentiating and marketing beef: a certification mark and a USDA ...
Economic Evaluation Of New Technologies For Pork Producers: Examples Of All-In All-Out And Segregated Early Weaning, John Lawrence
Objective: To describe a method to evaluate both the profitability and feasibility of potential investments in a pork-raising enterprise.
Design and procedure: Formulas are given to allow an economic analysis addressing both the feasibility and profitability of a project. Data from a hypothetical farm considering whether to adopt an all-in–all-out and a segregated early weaning scheme are used as examples to illustrate the formulas.
Implications: When considering whether to adopt a new technology, it is important to first calculate both the profitability and feasibility of the investment