Arkansas Animal Science Department Report 2002

The faculty and staff of the Animal Science Program are pleased to present the sixth edition of the Arkansas Animal Science Report. As with virtually all programs in the country, budget constraints presented serious challenges to teaching, research, and extension programming. However, the faculty and staff responded with innovation, good management, and hard work to maintain a productive program designed to benefit the students of the University and the citizens of the state. We are committed to remaining faithful to our Land-Grant mission. A sincere thank you is owed to Dr. Zelpha Johnson and Dr. Wayne Kellogg for editing this publication. We are proud that Meat and Poultry magazine ranked the animal and poultry programs at the University of Arkansas among the top four in the United States for 2003. This is a tribute to the dedicated and talented faculty in the Departments of Animal Science, Poultry Science, and Food Science and to their high level of cooperation

An Econometric Model for American Lobster

An econometric model for the wholesale and ex-vessel markets of American lobster, Homarus amedcanus, was developed to determine the market impact of proposed increases in the minimum size for American lobster. Prices were found to be inflexible with respect to landing, imports, and income (i.e., the price flexibilities were less than one) in both wholesale and ex-vessel markets. The size of lobster has a statistically significant effect on wholesale and ex-vessel prices and revenues. On average, wholesalers pass along 52% of any price changes to lobstermen. The ex-vessel price impact of a given change in supply is about the same as for changes in either landings or imports. Any changes in public policies leading to increases in total landings of American lobster and/or decreases in the proportion of small lobsters in the landings would result in increases in gross revenues to fishermen and wholesalers. While the long-term impact would be favorable, the short-term market impact of increases in the minimum size for lobster would be uncertain.Demand and Price Analysis, Environmental Economics and Policy, Resource /Energy Economics and Policy,

Wedding Of The Roses

https://digitalcommons.library.umaine.edu/mmb-ps/2167/thumbnail.jp

Priorities Puzzle under Ship Moorage Act

The Ship Mortgage Act provides that a preferred ship mortgage, that is one which complies with the requirements of the act, shall have priority over all except preferred maritime liens. It then proceeds to define preferred maritime liens as those liens arising before the recording and indorsement of the preferred mortgage in question, and also those liens arising from damages resulting from torts, those arising for wages of a stevedore when employed directly by the owner or operator, master, ship\u27s husband or agent of the vessel, and those arising for the wages of the crew, for general average and for salvage. It will be noticed that this enumeration does not include many maritime liens, arising either by virtue of the general maritime law or of the Maritime Lien Act. The consequence would seem to be that where there existed against a ship one or more of each class of lien the claims secured by them should be satisfied in the following order: (1) preferred liens, (2) ship mortgage, (3) non-preferred liens. This would be simple enough if those liens denominated preferred by the Act were, by the general maritime law, always superior to other maritime liens. But unfortunately for the cause of simplicity this is not so

Nonlocal Gravity: Modified Poisson's Equation

The recent nonlocal generalization of Einstein's theory of gravitation reduces in the Newtonian regime to a nonlocal and nonlinear modification of Poisson's equation of Newtonian gravity. The nonlocally modified Poisson equation implies that nonlocality can simulate dark matter. Observational data regarding dark matter provide limited information about the functional form of the reciprocal kernel, from which the original nonlocal kernel of the theory must be determined. We study this inverse problem of nonlocal gravity in the linear domain, where the applicability of the Fourier transform method is critically examined and the conditions for the existence of the nonlocal kernel are discussed. This approach is illustrated via simple explicit examples for which the kernels are numerically evaluated. We then turn to a general discussion of the modified Poisson equation and present a formal solution of this equation via a successive approximation scheme. The treatment is specialized to the gravitational potential of a point mass, where in the linear regime we recover the Tohline-Kuhn approach to modified gravity.Comment: 27 pages, 4 figures; v2: minor improvements, accepted for publication in J. Math. Phy

Glacial History of the Amundsen Sea Shelf

This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports a marine geological investigation of the Amundsen Sea region toward a better understanding of the deglaciation history of the West Antarctic Ice Sheet (WAIS). The WAIS may be inherently unstable because it is the last marine-based ice sheet in the world. Unlike other embayments in West Antarctica, major ice streams draining into the Amundsen Sea from the interior of the WAIS lack buttressing ice shelves. Mass balance data for the distal portions of these ice streams (Pine Island and Thwaites glaciers) appear to be in balance or may be becoming negative. Because both ice streams have beds that slope downward toward the center of the ice sheet, grounding-line recession resulting from either continued thinning or sea-level rise could trigger irreversible grounding-line retreat, leading to ice-sheet disintegration and consequent global sea-level rise. The limited marine geological and geophysical data available from the Amundsen Sea suggest that grounded ice or an ice shelf occupied the inner Amundsen Sea embayment until perhaps as recently as 1000 to 2000 years ago, and this ice may have retreated rapidly in historic time.This project, a study of the marine geology and geophysics of the Amundsen Sea continental shelf from 100 degrees W to 130 degrees W, is designed to address the Amundsen Sea part of WAIS Science Plan Priority Goal H2: What is the deglaciation history in the eastern Ross, the Bellingshausen and Amundsen Seas? This project will examine bathymetric data of the Amundsen Sea continental shelf to determine the positions of former ice-steam channels, and to aid in choosing sites for sediment coring. Single-channel seismic reflection studies will be conducted in order to determine sediment-thickness patterns, to aid in choice of coring sites, and to locate and identify morphologic features indicative of former grounded ice (e.g., moraines, scours, flutes, striations, till wedges and deltas, etc.). Coring will be concentrated along former ice flow-lines. Core samples will be analyzed in the laboratory for sedimentology, to determine whether of not basal tills are present (indicating former grounded ice and its former extent), and for calcareous and siliceous microfossils. The chronology of grounding-line and ice-shelf retreat from a presumed Last Glacial Maximum position near the shelf break will be established using accelerator mass spectrometry (AMS) carbon-14 dates of acid-insoluble particulate organic carbon.This project will share ship time in the Amundsen Sea with a physical oceanographic project. Marine geologic data and samples collected will be integrated with findings of other investigators toward developing a comprehensive interpretation of the history of the WAIS