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Inheritance Of Teat Number And Its Relationship To Maternal Traits In Swine, R. A. Pumfrey, R. K. Johnson, P. J. Cunningham, Dwane R. Zimmerman

Department of Animal Science: Faculty Publications

The relationship of teat number to seven measures of female reproduction was evaluated in the University of Nebraska Gene Pool population. Teat number was recorded for 7,513 pigs, ovulation rate for 2,794. gilts and litter size and weight at birth and weaning (42 days) for 789 gilts. Paternal half-sib and full-sib analyses were used to estimate heritabilities for each trait and to estimate the genetic and phenotypic correlations of teat number with the measures of reproduction. The direct response to selection for ovulation rate and the correlated response in teat number were also evaluated from the regressions of line differences …

The Relationships Between Plasma Progesterone And Lh And The Numbers Of Corpora Lutea And Embryos In Purebred And Crossbred Gilts, R. P. Wettemann, R. K. Johnson, I. T. Omtvedt

Department of Animal Science: Faculty Publications

Relationships between plasma progesterone and luteinizing hormone (LH) and the numbers of corpora lutea and embryos were determined in 133 8-month-old purebred Duroc, Hampshire and Yorkshire gilts and two-breed crosses among the three breeds. The numbers of corpora lutea and normal embryos were determined at slaughteronday 30.8 ± .2 of pregnancy, and progesterone and LH were quantified in plasma obtained the previous day. Progesterone concentrations in plasma were influenced by sire (P<.10), breed of dam (P<.05) and breed of sire x breed of dam (P<.05). Hampshire gilts had higher concentrations of progesterone in plasma than did Durocs (P<.05) and Yorkshires (P<.01). None of the effects in the model was significant for LH. Plasma progesterone and LH had heritability estimates of .48 ± .41 and .29 ± .40, respectively. Most genetic and phenotypic correlations of plasma progesterone and LH with other traits were small. These data indicate that progesterone concentrations in plasma at 30 days of pregnancy are not a satisfactory predictor of the numbers of corpora lutea and embryos. The differences in plasma progesterone between breeds illustrate the need to consider the breed of gilts when selecting animals for the study of luteal function or physiological factors that may influence progesterone concentrations in plasma.

Annotated Checklist Of Mammals Of Nebraska, J. Knox Jones Jr., Jerry R. Choate

University of Nebraska State Museum: Mammalogy Papers

Since the completion nearly 20 years ago of the manuscript on a distributional and taxonomic study of the mammals of Nebraska (Jones, 1964), numerous changes in nomenclature resulting from systematic studies have occurred. Additionally, five species of mammals (two bats, two shrews, and an armadillo) have been recorded as new to the state in the past few years, and one bat species (Myotis evotis) has been dropped from the list. Because scientists, conservation officials, environmental agencies, nature students, and others find up-to-date checklists of considerable use, particularly in connection with field work, we have revised the list of …

1978 Nebraska Nesting Survey, Esther V. Bennett

Nebraska Bird Review

Data on the 1978 nesting season in Nebraska were receivead from 17 observers, reporting on 71 species from 27 counties. Counties in the tabulation are listed in a west to east order, with the northernmost of approximately equal locations given first. Numbers represent Nest-Record Cards. Letters are from the NOU Nesting Report forms: Y represents young observed; F represents carrying food; and N represents nests for which no Nest-Record Card was submitted. Fifty·one species were reported on 187 North American Nest·Record Cards. The counties, with the column numbers on the tabulation shown in parentheses, and the contributors, were: Adams (20) …

An Analysis Of Migration Schedules Of Non-Passerine Birds In Nebraska, Paul A. Johnsgard

Nebraska Bird Review

One of the major components of the Nebraska Bird Review since its inception has been the annual spring migration and occurrence report, and in more recent years the fall occurrence report has become equally important. Yet, other than an uncompleted effort by W. F. Rapp, Jr. to summarize the first 25 years of spring migration data, these records apparently have not been analyzed by anyone. Part of the problem is the sheer mass of data to be assimilated, and a second issue is the question of how to classify certain species, for the analysis of a winter visitor required different …

Notes [June 1980], Ben G. Ohlander

Nebraska Bird Review

GYRAFALCONS, PRAIRIE FALCONS. Of great interest are reports again this season of Gyrafalcons in Nebraska. At least three confirmed sightings were reported by knowledgeable individuals. First, Gary and Jackie Ohman, of Battle Creek, sighted an immature gray phase male Gyrafalcon about 3 miles west of Thedford, Thomas Co., on 25 September 1979. On 11 November 1979 I observed an immature male gray phase Gyrafalcon about 12 miles southwest of Minden, Kearney Co. I was able to approach as close as20 feet from the bird in my car. Athird reported sighting occurred in early December 1979 about 4 miles west of …

Notes- Nebraska Bird Review (June 1980), Ben G. Ohlander

Nebraska Bird Review

NOTES

GYRAFALCONS, PRAIRIE FALCONS. Of great interest are reports again this season of Gyrafalcons in Nebraska. At least three confirmed sightings were reported by knowledgeable individuals. First, Gary and Jackie Ohman, of Battle Creek, sighted an immature gray phase male Gyrafalcon about 3 miles west of Thedford, Thomas Co., on 25 September 1979. On 11 November 1979 I observed an immature male gray phase Gyrafalcon about 12 miles southwest of Minden, Kearney Co. Iwas able to approach as close as 20 feet from the bird in my car. Athird reported sighting occurred in early December 1979 about 4 miles west …

The Seventy-Ninth Annual Meeting

Nebraska Bird Review

The Seventy-ninth Annual Meeting was held at the 4-H Camp in the Bessey Division of the Nebraska National Forest, near Halsey, 17 and 18 May, 1980. The attendance at this meeting was 73, compared to "seventy-odd" at the 1973 meeting and 87 at the 1970 meeting, both held at the Camp. The formal program, which was held to a minimum to maximize the time available for birding consisted of demonstrations of bird banding by Hazel and Fitzhugh Diggs of Hamburg, Iowa, and Ruth Green of Bellevue, and at the annual banquet a slide-illustrated talk by David Griffiths, of Pueblo, Colorado, …

The Section Of Mammals Of Carnegie Museum Of Natural History, Hugh H. Genoways, Duane A. Schlitter

University of Nebraska State Museum: Mammalogy Papers

The Section of Mammals at Carnegie Museum of Natural History is responsible for the care of the collections of Recent mammals, and research on these collections. "Recent mammals?!" The capitalized word "Recent" refers to the geological time period since the last ice age (about 10,000 years ago) until the present time. Mammals are that group of animals characterized by the presence of hair at least during some time of their lives, warm blood, and the production of milk. Therefore, our work really involves living mammals with which everyone is familiar; however, our work also does include study of such recently …

Demographic And Reproductive Parameters Of The Yellow-Cheeked Pocket Gopher (Pappogeomys Castanops), Michael J. Smolen, Hugh H. Genoways, Robert J. Baker

University of Nebraska State Museum: Mammalogy Papers

A population of Pappogeomys castanops simulans was live-trapped on a 3.5-ha study area in Lubbock, Texas, from September 1971 to September 1973. Seasonal and annual differences in population size were observed, with the population fluctuating between 20 and 25 gophers. Female reproductive activity began in January and continued until October, with an obvious period of recruitment lacking; however, a peak was observed in March and April. Females produced as many as three litters per reproductive season. Females born early in the year were sexually mature within the reproductive season of their birth. Females had an average survival rate of 56 …

A Comparison Of Vitamin A1 & A2 Levels & The Role Of Beta-Carotene & Lutein In The Synthesis Of Vitamin A In Freshwater Fishes, Benjamin Del Tito Jr.

Masters Theses & Specialist Projects

The objectives of this study were to determine naturally occurring concentrations of vitamin A₁ and A₂ in selected native fishes and, under laboratory conditions, to determine the possible role of beta-carotene and lutein in the synthesis of vitamin A by goldfish. The native fishes were selected to exhibit different feeding habits and were taken from different habitats (stream vs. lake) during different seasons of the year. In the laboratory, two possible precursors, beta-carotene and lutein, were incorporated into the diet to determine the role of these substances in the synthesis of vitamin A.

Species of fish differed in …

Kentucky Warbler (Vol. 56, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

Drugs & Horse Racing

Close Up Reports

HSUS working to end use of drugs at tracks--new bill introduced in House & Senate

Production Of Mountain Whitefish (Prosopium Williamsoni) In Altered And Unaltered Reaches Of Two Intermountain Streams In Their Alluvial Flood Plains, Michael J. Ottenbacher

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Estimates of production and related parameters (growth rate, density, standing crop) were made for populations of mountain whitefish in altered and "unaltered" areas of the Blacksmith Fork and Logan River, Utah from spring 1975 through summer 1976. Capture records of marked whitefish were also analyzed to describe fish movement and check on assumptions implicit in the population estimator.

Mean weights and instantaneous growth rates of whitefish were similar at all sites for comparable size/age groups. Among sites, differences in production per sampling interval and annual production were due mainly to differences in standing crop and/or age structure.

Estimates of mountain …

Resource Partitioning In Breeding Populations Of Marsh Hawks And Short-Eared Owls, Susan C. Linner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the 1979 breeding season four pairs of northern harriers, or marsh hawks (Circus cyaneus) and four pairs of short-eared owls (Asio flammeus) were studied in Cache Valley, Utah. The study was concerned solely with diurnal resource utilization, and did not examine the owls' nocturnal activities. The home range of each harrier pair overlapped substantially with that of an owl pair. Percent habitat overlap for hawk-owl pairs varied from 39 percent to 72 percent. Observations were made to determine if differences existed in their utilization of habitat and food resources, or in their daily and seasonal …

Evaluation Of Six Strains Of Rainbow Trout (Salmo Gairdneri) Stocked As Fingerlings In Porcupine Reservoir, Utah, Mark Hudy

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Different strains of rainbow trout (Salmo gairdneri), Ten Sleep, Sand Creek, Beitey, Shepherd-of-the-Hills, New Zealand, Fish Lake-Desmet, Desmet, were compared for survival to the creel, growth and catchability after being stocked in a fluctuating 80 ha Utah reservoir. Fish were stocked in the spring and fall as fingerlings and monitored by creel censusing, gill netting and electrofishing. Fish were tagged with coded wire snout tags prior to stocking. An angler opinion survey was conducted to determine angler satisfaction with numbers and size of fish caught.

Regardless of strain, spring stocking was superior to fall stocking in survival to …

Lactation And Weaning Weight Relationships In Hereford And Simmental-Hereford Cows In Southern Utah, William E. Zimmerman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Lactation and weaning weight relationships were studied in 37 cows grazing Southern Utah irrigated pastures during the summer of 1979. The herd included 23 Hereford cows ranging in age from 2 to 12 years and 14 Simmental-Hereford half-blood cows aged 3 to 9 years. The suckling calves were sired by Hereford bulls.

The average daily milk yield of 6.16 kg was affected by the cow breed. Simmental-Hereford cows produced 7.11 kg of milk per day, while the Herefords produced 5.21 kg per day. Milk production declined with increased days in lactation. The decline was linear in the Simmental- Hereford cows …

Leptophos Metabolism In The Rat: An In Vivo Study Of Oxidative Versus Conjugative Modes Of Metabolism, David Richard Hampson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The objectives of this research were to examine the metabolism in vivo of the pesticide leptophos in the rat under normal conditions and during inhibition of the mixed-function oxidases and during depletion of glutathione. Glutathione is a cofactor in the conjugation reactions of the glutathione-S-transferases. Both the mixed-function oxidase system and the glutathione-S-transferases have been shown to be important in the biotransformation of other organophosphate pesticides.

Urinary metabolites of leptophos were extracted, derivatized and subsequently analyzed by gas-liquid chromatography. The methods used to analyze for alkyl phosphonates were subject to several shortcomings and modifications of the original procedure were necessary. …

Animal Science Newsletter, Spring 1980

Department of Animal Science: Departmental News

Contents:

Greetings from Your Animal Science Department
Animal Science Reunion
Animal Science Alumnus Receives Honorary Degree
Staff Members Receive Livestock Service Awards
Animal Science Professor Receives Distinguished Teaching Award
Block and Bridle Honoree is J. Gerald Beattie
Animal Science Professor Receives Distinguished Teaching Award
Animal Science Graduates Come from Many States and Countries
Gamma Sigma Delta Award to Sullivan
National Extension Award to Fritschen
Meet the New Animal Science Department Staff Members
1979 Livestock, Dairy and Meats Judging Teams

Evolutionary Origin Of Eptesicus Lynni, Michael L. Arnold, Robert J. Baker, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Currently, three species of bats of the genus Eptesicus (fuscus, guadeloupensis, and lynni) are recognized as occurring on islands in the Antilles. Of these, E. fuscus and E. guadeloupensis are believed to belong to the fuscus-group of the genus (Davis, 1966; Genoways and Baker, 1975). However, the status and relationships of E. lynni are unclear. Shamel (1945) described lynni as a member of the brasiliensis-group. On the other hand, Sanbom (1941) considered three earlier specimens of lynni as members of the subspecies E. fuscus hispaniolae (we have examined the Sanbom specimens and they are referable to …

The Development Of Methodology For Gas Liquid Chromatographic Determination Of Plant Sugars In Maturing Reed Canarygrass, Allan Scott Bittner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was concerned with development of chromatographic methods suitable for determination of plant sugars. The resultant methodology was applied to the comprehensive study of plant carbohydrates as they vary during plant growth. Plant cell walls were isolated with boiling water followed by delignification with acid chlorite. The soluble portions were hydrolyzed with 2N sulfuric acid and the total sugars and individual monosaccharides were quantified using gas chromatography and colorimetry. The insoluble residues were hydrolyzed with 72% sulfuric acid followed by dilution with water to 2N and further hydrolysis. The effects of duration of delignification and acid hydrolysis were interpreted …

Reproductive Success Of The White-Faced Ibis: The Effects Of Pesticides And Colony Characteristics, Benjamin B. Steele

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Reproductive success of white-faced ibis (Plegadis chihi) was measured in nine colonies on marshes in northern Utah during 1979. The effects of pesticides and characteristics of colonies and sub-colonies on reproductive success were examined.

DDE was present in all 80 eggs sampled and had a geometric mean concentration of 1.25 ppm. Shell thickness of 176 eggs was 4.3 percent below pre-1945 thickness. Shell thickness was weakly correlated with residues of DDT, DDE, Dieldrin, and heptachlor epoxide. Residues of these four pesticides were all correlated with each other. However, because of the stronger correlations between shell thickness and two …

High Value Fishery: Vessel-Harvest Helicopter Landing, Roger F. Scott

Marine Affairs Theses and Major Papers

The purpose of this paper is to examine the feasibility of using helicopters to move high value fish from the offshore fishing fleet at sea, to market distribution locations. To accomplish this purpose, data was collected on the high value swordfish species, ex-vessel, $1.50 per pound, and used to compare three basic options. Two Sikorsky helicopters were considered in the options tested; the light lift S58T, and the medium lift S61. The data shows the S58T to dominate the S61 in all comparisons. An underlying assumption of the analysis is that the fish landed by helicopter will demand a premium …

An Investigation Into A New England Fisheries Development Project: Towards The Expansion Of The Whiting Fishery, J. H. Kaelin

Marine Affairs Theses and Major Papers

In 1973, the New England Fishery Development Program (NEFDP), an industry/government partnership was formed to offset a portion of the economic decline of the New England fishing industry while encouraging the development of underutilized species and nontraditional fishery products. The purpose of this paper is to examine one of the NEFDP's development projects and to comment on its apparent success. This paper attempts to determine if domestic processors can be expected to produce whiting fillet blocks that can compete in the market place with foreign imports. Several aspects of the problem are favorably resolved-an abundant whiting resource is available; the …

Lagurus Curtatus, Lynn E. Carroll, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Lagurus Gloger, 1841

Relationship Between Relative Brain Size And Climbing Ability In Peromyscus, Cliff A. Lemen

School of Natural Resources: Faculty Publications

Eisenberg and Wilson (Evolution, 32:740-751, 1978) have documented an interesting relationship between the relative brain size of bats and the complexity of the habitat in which they forage. They found that bats that fly and forage through foliage have larger brains relative to their body size than those that forage in open air. Their explanation was that bats in the complex habitat must process more complex sonic information to navigate through the foliage. In order to do this a larger brain is required.

The Peromyscus of North America may offer a similar paradigm as far as habitat complexity …

Filtration Ingestion And Assimilation Rates Of The Mysid Shrimp Neomysis Americana Smith, Fed Three Food Sources, Robert W. Grabb

OES Theses and Dissertations

Laboratory grazing and assimilation experiments were conducted on the mysid shrimp Neomysis americana in an attempt to assess the suitability of three potential food sources. It was hypothesized that the smaller size classes were primarily herbivores, not becoming omnivorous until attaining lengths of approximately 5-6 mm. Four size classes of mysids from the summer generation, juveniles, immature, adult males, and adult ovigerous females were each fed three concentrations of Artemia salina nauplii, the rotifer Brachionus plicatilis, and the diatom Coscinodiscus lineatus. The mean lengths of the size classes utilized, plus or minus one standard deviation, were 2.5 …

The Feasibility Of Commercial Scale Culture Of Atlantic Sturgeon, Acipenser Oxyrhynchus, Christopher John Coffing

Biological Sciences Theses & Dissertations

Abstract unavailable.

1980 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

Metabolism And Solar Radiation In Dark And White Herons Nesting In Hot Climates, Hugh I. Ellis

Biology: Faculty Scholarship

Metabolism, body temperature (Tb), and feather reflectance was measured for dark Louisiana herons (LOU), little blue herons (LB), snowy egrets (SE), and cattle egrets (CE); only LOU nest preferentiallyin shade. The reflectance of LOU and adult LB was 13%-15%; it was 80%-82% for SE, CE, and immature (white) LB. Tb for all four species approximated 40 C; hypothermy was never observed. Basal metabolism (HJb) was 107% of the expected level for LOU, 85% for SE and CE, and 66% for LB. Minimal thermal conductance (C) was calculated as approximately 131% of the expected value for LOU, 115% for SE and …