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Comparison Of Predicted And Observed Dioxin Levels In Fish: Implications For Risk Assessment, Judy S. Lakind, Daniel Q. Naiman

RISK: Health, Safety & Environment (1990-2002)

After comparing sampled and modelled dioxin levels in the tissue of fish near pulp and paper mill discharges, the authors argue that, until an improved bioaccumulation model is incorporated into EPA's Risk assessment process, determination of human health Risks associated with consuming dioxin-contaminated fish should be based on sampling.

A Survey Of Helminths Of Ondatra Zibethicus In Eight States And Four Foreign Countries, Mike P. Lyons

McCabe Thesis Collection

The muskrat, Ondatra zibethicus. is a large member of the Order Rodentia and regarded as the United States' most important fur bearing mammal (Abram, 19 69) . Helminths, or parasitic worms, include amongst its members: trematodes (flukes), cestodes (tape worms) and nematodes (round worms). Parasite surveys based on geography and subspecies of the host, Ondatra zibethicus. have pieced together information gaps based on these criteria and enabled investigators to construct an overall picture of helminth parasites in the United States and elsewhere.

The question of helminths in representative host species can be addressed either through necropsy examinations or through literature …

Kentucky Warbler (Vol. 69, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Review Of Bag And Size Limit Proposals For Western Australian Recreational Fishers., F. B. Prokop

Fisheries Management Papers

The Fisheries Department of WA and the Recreational Fishing Advisory Committee (RFAC), which is the peak body representing recreational fishers in WA, have been very pleased with the response to the implementation of two year review of recreational fisheries. Fisheries, RFAC and the fishing community recognise that the two year review was the first step in the continually evolving process of management of recreational fisheries. Since the new bag and size limit regulations were introduced in December 1991, there have been many suggestions for refinement and improvement. This management paper includes the most common and best suggestions for future management. …

Fisheries Management Paper No 53 - Rock Lobster Industry Advisory Committee - Report To The Minister For Fisheries And Management Arrangements For 1992/93, Fisheries Department Of Western Australia

Fisheries Management Papers

The Minister for Fisheries announced the 1992/93 fishing season management arrangements for West Coast Rock Lobster Fishery on 11 August 1992. These arrangements arose as a result of the Minister's consideration of the Rock Lobster Industry Advisory Committee's recommendations outlined in Fisheries Management Paper no.46.

Following this announcement, on 28 August 1992, the Western Australian Fishing Industry Council Sub-Committee on rock lobster submitted a range of alternative management proposals.

The Rock Lobster Industry Advisory Committee (RLIAC) met in Perth on the 9 September 1992 at the request of the Minister for Fisheries to further examine and report on management arrangements.

The Mayfly Newsletter, Peter M. Grant

The Mayfly Newsletter

The Mayfly Newsletter is the official newsletter of the Permanent Committee of the International Conferences on Ephemeroptera.

Wpa News 40 (1993), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (May 1993), number 40

Published by the World Pheasant Association

Fat Content Of American Kestrels (Falco Sparverius) And Sharp-Shinned Hawks (Accipiter Striatus) Estimated By Total Body Electrical Conductivity, Shari M. Harden

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Total body electrical conductivity (TOBEC) is a noninvasive method for the estimation of lean mass in live subjects. Lipid content can be calculated from the body mass measured and the lean mass estimated from TOBEC. I used live American Kestrels (Falco sparverius) to study the accuracy of this method. TOBEC measurements were compared to actual body content determined by Soxhlet fat extraction using petroleum ether as the solvent. TOBEC estimated 73.7% of the variation in lean mass in a sample of 21 kestrels. The use of restraining devices (Vetrap and cardboard cylinders) altered the TOBEC measurement but only …

Gregarious Behavior In Large Mammals: Modeling, Methodology, And Application, Thomas L. Morton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gregarious behavior of ungulates was considered in four ways. The first concern was W. D. Hamilton's hypothesis that a simple movement rule could reduce predation risk and encourage grouping behavior. Simulations showed little effect of this nearest-neighbor rule on predation risk. Similar, more complicated rules reduced predation risk by up to two thirds.

The second focus was on the accuracy of ground observers in diagramming individual animal locations in small herds of elk. A remotely controlled airplane was used to photograph the herds from above. A substantial distance discrepancy was found between "true" and "observed" animal locations. This discrepancy increased …

Effects Of Rumen-Protected Amino Acids On Production In Holstein Cows, David Paul Dawson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Six nonlactating Holstein cows fitted with rumen and duodenal cannula were used to determine the efficacy of pH sensitive fatty acid polymer encapsulation as a means protecting amino acids from rumen fermentation and as a post-ruminal amino acid delivery system. The cows were arranged in a 2 X 2 factorial in a Latin Square design. Treatments were 1) the basal ration, and 2) basal ration plus rumen-protected lysine, methionine, and threonine at 10 g each per day.

Rumen parameters measured were pH, ammonia, volatile fatty acids, protozoa, liquid, and dry matter rate of passage, total viable bacteria, and viable cellulolytic …

Treatment Of Low Quality Forages By Hydrogen Peroxide And(Or) Anhydrous Ammonia And Their Utilization In Ruminant Nutrition, Mohammed Diouri

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three experiments were conducted to evaluate low quality forages treatment by anhydrous ammonia (NH₃) and(or) hydrogen peroxide (H₂O₂).

In experiment I, a control and three treatments of barley straw were compared: NH₃, NH₃ after rehydration of the straw with water (NH₃+H₂O), and NH₃ after rehydration with a H₂O₂ solution (NH₃+H₂O₂). Forages were fed, with a supplement, at two levels of intake (ad libitum and 75% of ad lib.). Treatments were administered in a split-plot in a Latin …

Characterization Of A Dexamethasone-Immunosuppressed C57bl/6n Mouse Model For Chronic Cryptosporidiosis, Edward G. Martin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cryptosporidium parvum is a coccidian protozoan that colonizes epithelial cells lining respiratory and digestive tracts of animals and humans. Cryptosporidiosis is a well-recognized zoonotic disease infecting primarily neonates and immunocompromised hosts, including human immunodeficiency virus-infected patients. Clinical disease is manifested as a chronic diarrheal illness that is self-limiting in immunocompetent hosts and prolonged and often life-threatening in hosts with compromised immune systems. The lack of a suitable small animal model for screening anti-cryptosporidial drugs and for examining the pathogenicity and immunobiology of chronic cryptosporidosis was the impetus for this research effort.

The objectives of the present study were three-fold: to …

Correlations For Genetic Expression For Growth Of Calves Of Hereford And Angus Dams Using A Multivariate Animal Model, R. Nunez-Dominguez, L. Dale Van Vleck, K. G. Boldman, Larry V. Cundiff

Department of Animal Science: Faculty Publications

The purpose of this study was to estimate the correlation between the expression of genes from sires in purebred and crossbred progeny (r_PC) and in Hereford and Angus F₁ calves (r_HA). Performance traits were weights at birth, 200 d, and 365 d. Progeny from Hereford, Polled Hereford, and Angus bulls mated to Hereford or Angus cows were used to estimate rpc. Progeny from Charolais, Shorthorn, Simmental, Limousin, Maine-Anjou, Chianina, Gelbvieh, Tarentaise, and Salers bulls mated to Hereford or Angus cows were used to estimate rm. Performances in purebreds (P) and crosses (C) or in Hereford …

The West Coast Shark Fishery Draft Management Plan., D. A. Hall

Fisheries Management Papers

The main purpose of this report is to advance the development of a scheme of management for the commercial shark fishery off the west coast of Western Australia. There is considerable scientific concern over the biological status of commercially important shark stocks in this region, particularly dusky whaler (Carcharhinus obscura), thickskin (Carcharhinus plumbeus) and whiskery sharks (Furgaelus macki).

The South West Beach Seine Fishery Draft Management Plan., D. A. Hall

Fisheries Management Papers

This paper describes the issues in and outlines a proposal for management of the beach seine fishery between Tim's thicket and Cape Beaufort on the south coast. It also proposes management measures for the fishery utilising small mesh gill nets and hand hauled seine nets in the area inside of the 10 metre depth contour.

Pregnancy Rate Is Greater When The Corpus Luteum Is Present During The Period Of Progestin Treatment To Synchronize Time Of Estrus In Cows And Heifers, T. Sanchez, M. E. Wehrman, E. G. M. Bergfeld, K. E. Peters, F. N. Kojima, Andrea S. Cupp, V. Mariscal, Roger J. Kittok, Richard J. Rasby, J. E. Kinder

Department of Animal Science: Faculty Publications

Our hypothesis was that conception in bovine females would be enhanced if the corpus luteum was present during the period of progestin treatment to synchronize estrus. In this study, 67 heifers (one replicate) and 124 cows (two replicates) were randomly assigned to one of two treatment groups. Seven days after estrus (Day 0), all animals were implanted with norgestomet and the implant remained in place for 10 days. All implants were removed on Day 17. Cows and heifers in one group received prostaglandin F_2α (PGF_2α) on Day 7 of the estrous cycle (PG 7; norgestomet without corpus …

Nebraska Bird Review (March 1993) 61(1), Whole Issue

Nebraska Bird Review

Table of Contents

1992 Treasurer’s Report……………..2

Samuel Aughey's List of Nebraska Birds (1878): A critical Evaluation by Roger S. Sharpe …………….. 3

Bird Count, NOU winter Meeting, Grand Island, NE, 1993 ……………..11

1992 Nebraska Christmas Bird Count …………….. 11

1993 Midwinter Survey of Bald and Golden Eagles in Nebraska ……………..22

Samuel Aughey’S List Of Nebraska Birds (1878): A Critical Evaluation, Roger S. Sharpe

Nebraska Bird Review

The University of Nebraska was founded in Lincoln in 1869, but finances did not allow the addition of a scientist until 1875, when Samuel Aughey was added to the staff to fill the first chair of natural history (Pound and Clements 1900). Although a theologian by training, Aughey wrote prolifically on a number of natural history subjects pertaining to Nebraska, including its flora, fauna, and geology. A summary of his impressions of the natural history of the state, including its biota, was published in a book, "Sketches of the Physical Geography and Geology of Nebraska" (Aughey 1880), which was printed …

Mammals Of The Platte River Valley: Final Report, Patricia W. Freeman, Russell A. Benedict

University of Nebraska State Museum: Mammalogy Papers

Nebraska is characterised as a critical juncture for distributional ranges of mammals from northern, southern, eastern, and plains faunal elements. As might be expected, ranges have not remained static since the benchmark survey done by Jones, 1964. We have evidence that 10 of about 80 species of mammals found in the Platte River Valley have expanded their ranges. Opossum, red bats, bog lemmings, white-footed mice, woodchucks and least weasels are further west in the state, and grasshopper mice are further east in the state. Elliot's short-tailed shrew, cotton rats and armadillos are further north in the state. We have the …

Wpa News 39 (1993), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (February 1993), number 39

Published by the World Pheasant Association

Kentucky Warbler (Vol. 69, No. 1), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Breed Comparisons For Growth Traits Adjusted For Within-Breed Genetic Trend Using Expected Progeny Differences, R. Nunez-Dominguez, L. Dale Van Vleck, Larry V. Cundiff

Department of Animal Science: Faculty Publications

Records (2,910) of birth (BWT), weaning (WW), and yearling weight (YW) of F₁ calves produced in a top-cross experiment involving Angus, Hereford, Pooled Hereford, Charolais, Limousin, Simmental, Gelbvieh, Maine-Anjou, Chianina, Tarentaise, Shorthorn, and Salers bulls mated to Hereford and Angus cows and records (4,592) of WW on three-breed-cross calves out of 986 F₁ females of the same breed crosses were used in this study. The purposes were to estimate how much of the EPD of the sires was realized in crossbred calves and to estimate sire breed effects for the traits adjusted for genetic trend and sire sampling. …

Effects Of Growth Pattern On Muscle Growth, Nuclei Number, Protein Accretion, And Body Composition In Heifers, C. L. Alderson, R. H. Pritchard, D. L. Boggs

South Dakota Beef Report, 1993

The effects of compensatory growth on accretion of muscle mass, protein mass, and nuclei number of the supraspinatus and semitendinosus muscles were evaluated using seven serial slaughter groups of Angus x Limousin heifer calves (n = 28, BW 270 2 9.5 kg). Fractional growth rates of carcass protein and fat were also evaluated. To achieve compensatory growth, energy intake was restricted for 88 days (Phase 1) followed by adlibitum feeding of a high energy diet (Phase2) [LH]. Controls were allowed continuous ad libitum access to the high energy diet (HH). Muscle weights, body composition samples, and muscle biopsies were collected …

Biological Efficiency Differences Among Bos Taurus X Bos Taurus And Bos Indicus X Bos Taurus F1-Cross Cows, Ronnie D. Green, Larry V. Cundiff, Gordon E. Dickerson, Thomas G. Jenkins

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Matching germplasm to resources through designed crossbreeding programs can contribute to optimum beef production efficiency. This is particularly true in light of the wide diversity of environmental conditions encountered by beef producers in the U.S. This approach requires considerable knowledge about genetic diversity among breeds in components of performance and furthermore how those components interact to influence life-cycle efficiency in the production setting. It was largely this identified need, coupled with the importation of a number of new breeds from continental Europe, that gave impetus for the establishment of the Germplasm Evaluation (GPE) Program. In Cycles I and II of …

Characterizing Stress In Feeder Cattle, G. Leroy Hahn, John A. Nienaber

Roman L. Hruska U.S. Meat Animal Research Center: Reports

During the period August 6 to 10, 1992, a heat wave moved through central and eastern Nebraska. Maximum air temperatures were in the 90 to 95°F range, generally not considered to be extreme during the summer season. However, during this particular episode, the accompanying humidity was higher than normal (50 to 70% during the hottest portions of the day), with light to moderate winds except on August 8 when the wind was fairly strong. The relatively cool preceding summer weather had not adequately conditioned livestock to high levels of heat stress. As a result, several hundred feedlot cattle died in …

Gene Mapping In Cattle, Craig W. Beattie, Roger T. Stone, Michael D. Bishop, Sara L. F. Sunden, John W. Keele, Steven M. Kappes

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Over the last decade, progress in molecular biologic techniques has brought the mapping of genes within the human and mouse genomes to a point where information on the location of groups of genes and additional anonymous, but unique, bits of DNA (markers) within their respective genomes can be brought to bear in developing a bovine genomic map. This is possible because of the conservation of genes, particularly those concerned with regulating important functions, between species into syntenic (single chromosome) groups.

Investment in the development of a bovine map is important for several reasons. While continued selection of desirable traits by …

Immunization Against Inhibin Increases Sperm Production In Young Beef Bulls, Donald D. Lunstra, Terry L. Martin, Gary L. Williams, James J. Ireland

Roman L. Hruska U.S. Meat Animal Research Center: Reports

The specific biological mechanisms that control pubertal development, testicular growth and onset of sperm production in the beef bull have not been well defined. It is known that two protein hormones (the gonadotropins, LH and FSH) produced by the pituitary stimulate testicular growth, cause an increase in numbers of testicular receptors for LH and FSH, and stimulate production of steroid hormones by the testes. Researchers have shown that the patterns of LH and FSH secretion diverge during the peripubertal period in several species, including the bull. While LH increases during the peripubertal period of development in the bull, FSH exhibits …

Mortality And Cold Tolerance Of Calves With Different Ratios Of Bos Indicus To Bos Taurus Inheritance, Maurie J. Josey, Larry V. Cundiff, Robert M. Koch, Keith E. Gregory, G. Leroy Hahn

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Results from the Germplasm Evaluation Program (GPE) at the Roman L. Hruska U. S. Meat Animal Research Center (U.S. Meat Animal Research Center) have shown that significant differences exist among cows representing breeds of diverse biological types In such production traits as 200-day weaning wt per cow in the breeding herd. Production of Bos indicus F₁ cross cows (Brahman and Sahiwal sired crosses out of Hereford and Angus dams) was equalled only by F₁ cross cows sired by large size dual purpose breeds (Brown Swiss, Gelbvleh, Simmental, Holstein and Maine Anjou crosses out of Hereford and Angus dams) …

Beef Research Program Progress Report (1993) No. 4 (Part 1): Table Of Contents

Roman L. Hruska U.S. Meat Animal Research Center: Reports

ROMAN L. HRUSKA U.S. MEAT ANIMAL RESEARCH CENTER, D.B. Laster .... v

General Interest

Beef facilities and management at U.S. Meat Animal Research Center: W. Gordon Hays and Gary S. Ross .... 1

Genetics and Breeding

Cycle V of the germplasm evaluation (GPE) program in beef cattle: Larry V. Cundiff, Keith E. Gregory, and Robert M. Koch .... 3

Contributions of ovum cytoplasm and uterine environment and postnatal environment to maternal effects in beef cattle: Keith E. Gregory, and Ralph R. Maurer .... 6

Germplasm utilization in beef cattle: Keith E. Gregory, Larry V. Cundiff, Robert M. Koch, and Donald …

An Update On The Biological Control Of Rabbits, Stuart Wheeler

Journal of the Department of Agriculture, Western Australia, Series 4

When myxomatosis was introduced into Western Australia in the early 1950s, farmers, pastoralists and government alike thought it was an answer to the rabbit problem.

The disease was devastatingly effective in the short term and initially had a 99 per cent kill rate. With time, the virus declined in strength, and the surviving rabbits have multiplied.

There have been many recent reports about new forms of biological control for rabbits and potential improvements in old ones.

This article summarises each of the prospective methods and improvements, and assesses the potential usefulness of each.