Life Sciences Commons^™

Cytotypes And Morphometrics Of Two Phyllostomatid Bats, Micronycteris Hirsuta And Vampyressa Pusilla, Robert J. Baker, Hugh H. Genoways, William J. Bleier, Jerry W. Warner

University of Nebraska State Museum: Mammalogy Papers

Jackson and Patton stated that the key to understanding mechanisms of chromosomal evolution lies in studies of chromosomal variation within populations that can hybridize. Hybrids between cytotypes contain the answer to problems of meiotic pairing and reduced fertility, as well as information concerning the nature of zones of contact. However, before detailed studies can be initiated, chromosomal races and hybrid zones must be located. Few chromosomal races have been described for bats. Within the family Vespertilionidae, five species are known to have such races and races have been reported in two species of the family Phyllostomatidae.

Described are chromosomal races …

Cytotypes And Morphometrics Of Two Phyllostomatid Bats, Micronycteris Hirsuta And Vampyressa Pusilla, Robert J. Baker, Hugh H. Genoways, William J. Bleier, Jerry W. Warner

University of Nebraska State Museum: Mammalogy Papers

As pointed out by Jackson (1971) and Patton (1972), the key to understanding mechanisms of chromosomal evolution lies in studies of chromosomal variation within populations that can hybridize. Hybrids between cytotypes contain the answer to problems of meiotic pairing and reduced fertility, as well as information concerning the nature of zones of contact. However, before detailed studies can be initiated, chromosomal races and hybrid zones must be located. Few chromosomal races have been described for bats (Baker, 1970a). Within the family Vespertilionidae, five species are known to have such races (Baker, 1970a) and races have been reported in two species …

Natural And Unnatural Selection In A Wild Goose, Paul A. Johnsgard

Papers in Ornithology

Blue goose and snow goose color phases enable the species to reproduce efficiently in the harsh Canadian climate. But hunters, more eager than sporting, are upsetting this finely tuned pattern of survival.

Southeast South Dakota Experiment Farm Annual Progress Report, 1973, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This thirteenth annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation, corn breeding and performance, soybean research and planting, crop rotation, beef steers, and swine production.

Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 1973, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 1973 progress report for the Central Crops and Soils Research Station at Highmore, South Dakota State College. This document represents the research conducted at the Station during the 1973 crop season including: weather data, small grain variety testing, specialty crop testing, sorghum testing, crop production and management, crop disease control.

Financial Analysis South Dakota Farm Panel Records Program 1972, Herbert R. Allen

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

The data in this report have been obtained from a selected number of farms located in Hyde, Hand and Faulk counties. South Dakota. It is a summary of data gathered in the first 3 years of a pilot program for the development of a computerized farm financial information system. For this reason the data in this report cannot be interpreted as representative of all farms or all areas of South Dakota, However, it can serve as a guide to those persons with farm operations similar to the ones included in this report. This analysis compares the 1972 costs and returns …

How Many Cranes Make A Skyful?, Paul A. Johnsgard

Paul Johnsgard Collection

Every year thousands of lesser sandhills congregate along the Platte River in Nebraska on their spring migration northwards. Mainly because of local damage caused by the birds during their fall migration, they have been legally hunted since 1961. Can the population survive such persistent destruction?

One may ask the question “How many cranes are enough?” This is perhaps analogous to the rhetorical question as to how many redwood trees are needed to make a viable forest; for a remnant crane population is not only unimpressive but also seemingly does not survive or reproduce well, judging from population trends in the …

Whole Issue Nebraska Bird Review (December 1973) 41(4)

Nebraska Bird Review

TABLE OF CONTENTS

Recent Mammals of Crescent Lake National Wildlife Refuge, Garden County, Nebraska................ 71

A Bald Eagle Nest in Nebraska................ 76

Vertical Stratification among Selected Species of Birds ................77

Notes ................79

Index of Volume XXXXI ................81

Heligmosomoides Johnsoni Sp. Nov. (Nematoda: Heligmosomatidae) From The Heather Vole, Phenacomys Intermedius Merriam, Virginia R. Rausch, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

Heligmosomoides johnsoni sp. noy. is described from the cecum of the heather vole, Phenacomys intermedius Merriam, from the Olympic Mountains, Washington. The absence of longitudinal cuticular ridges dorsally separates H. johnsoni from species of Heligmosomoides other than H. hudsoni (Cameron, 1937), which occurs in varying lemmings, Dicrostonyx spp., and from which H. johnsoni is distinguished by its longer spicules, form of the dorsal ray, and other characters. Both Phenacomys and Dicrostonyx have a specialized cecum, with long villi around which the nematodes are found tightly coiled. The zoogeography of heligmosomid nematodes in Phenacomys is briefly discussed.

French abstract: On décrit …

Agricultural Experiment Station News December 1973

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S OFFICE
Production of Agricultural Research and Extension
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – NOVEMBER 1973
BULLETINS PRINTED

Lancaster County Tidal Marsh Inventory, Gene M. Silberhorn

Reports

No abstract provided.

Nsca - Asc - National Plan For Biological Collections, Asc Committee

Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications

American systematics collections: A national plan. Developed by a stellar group of biologists including David Wake and Peter Raven, this plan called for action by the systematics community. The estimate of needs in 1973 called for about 63 million USD for the next five years just to keep the US National Collections from disintegrating and to get them in shape to mount the huge effort needed to fully inventory the biota of the earth (a plan that was not even dreamed of until about the year 1995).

A report to the nation's systematics collections community, and includes a National Plan …

Short-Term Growth Response To Fertilization In Young Quaking Aspen, Keith Van Cleve

Aspen Bibliography

No abstract provided.

The Prairie Naturalist Volume 5, No.4. December 1973

The Prairie Naturalist

REESTABLISHMENT OF PRAIRIE IN EASTERN NORTH DAKOTA ▪ O. A. Stevens

THE AGE DISTRIBUTION OF ENVIRONMENTAL PERIODICALS ▪ D. H. Johnson

SOME OBSERVATIONS ON THE ECOLOGY OF PLUMATELLA REPENS (L.) (BRYOZOA: PLUMATELLIDAE) IN NORTHEASTERN NORTH DAKOTA ▪ R. D. Stoaks

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1973 ▪ R. N. Randall 61

NOTE: Red-bellied Woodpecker in Rolette, County, North Dakota ▪ D. T. Disrud 52

Index to Volume 5

Rotationally Inelastic Molecular Scattering. Computational Tests Of Some Simple Solutions Of The Strong Coupling Problem, Thomas P. Tsien, Gregory A. Parker, Russell T. Pack

Faculty Publications

Partial cross sections (opacity functions) for rotational transitions in atom-diatom collisions are computed in the infinite-order sudden (IOS) approximation and compared with accurate close-coupling (CC) calculations. Agreement is good in the dominant coupling (small total angular momentum J) region. Simple methods for calculating integral inelastic cross sections are discussed, and it is found that accurate cross sections can often be computed very simply, even when large numbers of channels are coupled together, by using IOS or first-order sudden (FOS) approximations for small J and CC or exponential Born (EBDW) methods for large J.

Growth Stimulant Substitutes For Stilbestrol, James J. O'Connell

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

No abstract provided.

Progress Reports For Investigation Of The Impact Of A Major Flood On The Fisheries Resources And Environments Of The Chesapeake Bay : For The Period September 1, 1972 - June 30, 1973, Virginia Institute Of Marine Science

Reports

• I. Effects of adult blue crabs and blue crab larvae [Activities related to Tropical Storm Agnes, Crustaceology Dept. / W.A. Van Engel --
• II. Effects on the plankton community [Plankton of the lower Chesapeake Bay, summer 1972] / G.C. Grant, R. Rhodes, J.E. Warinner, P.L. Zubkoff. --
• III. Influences on adult fish [James, York and Rappahannock River trawl survey, Agnes Flood, June 28-July 3, 1972; Follow-up, Aug. 8-Sept. 7, 1972] / W. Wilson; Hurricane Agnes, finfish investigations up to Sept. 7 , 1972 / W. Hoagman --
• IV. Influence on oyster associates [Survey of fouling in York River, 27 September …

Meeting The Protein Needs Of Growing And Finishing Cattle, William W. Schneider

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

The cost of nearly all feed commodities has sharply risen since one year ago. Those feed ingredients normally used as natural protein sources, however , have risen in cost much more dramatically than the roughages or the cereal grains used for animal feed. This substantial rise in cost of high protein feeds plus possible shortages of feed grade urea will force many cattle feeders to alter feeding and management practices used in the past. For example, recommendations in previous years frequently called for the use of soybean meal or soybean meal based supplements as the source of protein in growing …

Morphological And Physiological Factors Related To Yield Of Alfalfa, A. L. Foutz, Wallace Wilhelm, A. K. Dobrenz

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Several morphological and physiological factors were measured on clones of alfalfa (Medicago sativa L. ‘Mesa- Sirsa’) which displayed a wide range in SLW, leaflet weight and leaflet area. Apparent photosynthesis, dark respiration and post-illumination burst expressed as mg C0₂ dm^-2hr^-1 were not related to yield. However, when the rate of each factor was expressed on a whole plant basis (rate x leaf area per plant) , significant relationships were found with yield. Correlation coefficients between total apparent photosynthesis, total dark respiration, total post-illumination C0₂ burst and yield were r = .71*, r = .77* …

Effects Of Confinement Feeding Systems On Beef Cattle Production, R.D. Goodrich, J.C. Meiske, R.E. Smith, H.E. Henke

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

Several factors have stimulated interest in housing systems for feedlot cattle. Some of these factors are (1) the desire to eliminate problems associated with the use of bedding, (2) the desire to decrease the labor required for feeding, bedding and manure handling, (3) the need to develop effective pollution control measures and (4) the desire to know the effects that housing systems may have on the performance and carcass characteristics of feedlot cattle. The objectives of the trials reported herein were (1) to study the influence of housing systems on the performance of finishing steer calves and (2) to study …

Remarks For The Dedication Of The Robert B. Gordon Natural Area For Environmental Studies, Saturday, November 10, 1973 By Dr. William R. Overlease, Professor Of Biology, Administrator Of The Natural Area, West Chester State College, William R. Overlease

Gordon Natural Area History & Strategic Plan Documents

No abstract provided.

Carcass Characteristics Of Bulls, Heifers And Steers As Influenced By Ration And Market Weight, Peter B. Smith, W.J. Costello, Peter J. Thiex, L.B. Embry

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

High feed grain prices, a growing worldwide demand for animal protein, and increasing demand for lean, high quality beef make it imperative that beef volume and production efficiency increase. Because of high feed costs it is important to know how concentrate level in the ration and market weight influence production efficiency and carcass composition of different sex groups. The purpose of this study was to evaluate the effects of market weight and ration concentrate level on the quant itative and qualitative carcass traits of yearling bulls, bull calves, heifers and steers .

Investigation Of Western Yellow Pine (Pinus Ponderosa) Abortion, C. Cogswell, L.D. Kamstra

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

For a number of years, ranchers in western South Dakota have been of the opinion that pregnant cows will abort after the consumption of sufficient quantities of yellow pine (Pinus ponderosa) needles. Problem areas exist where the yellow pine is the predominant pine species. Incidence of pine needle abortion is particularly high in late winter and early spring after cows in the last trimester of pregnancy graze on the needles. Some ranchers, however, have experienced the problem throughout the year when cows in earlier stages of pregnancy have aborted. Retained placentas are frequently associated with the abortions. If true abortions …

Growth Stimulating Products For Feedlot Heifers Fed High-Concentrate Diets Of High-Moisture Corn, J.D. Burkhardt, L.B. Embry

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

This experiment was one in a series to determine the response by fee dlot heifers to various growth promoting products . Products tested were diethylstilbestrol (DES), zeranol and melengestrol acetate (MGA) under conditions of high-concentrate diets with high-moisture grain and hay or haylage.

Systematics And Evolutionary Relationships Of Spiny Pocket Mice, Genus Liomys, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Introduction

Spiny pocket mice of the genus Liomys are members of the rodent family Heteromyidae and together with the genus Heteromys form the subfamily Heteromyinae. Their geographic range extends from northern Sonora, in western Mexico, and southern Texas southward to the vicinity of the Panama Canal Zone. Within this area, members of the genus occur mainly in dry to arid situations being replaced in areas of rain forest and cloud forest by members of the genus Heteromys. The vernacular name for Liomys is based on the fact that many of their hairs have been modified in the form of …

Growing And Fishing Bulls, Heifers And Steers, P.J. Thiex, L.B. Embry

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

Growth rate of an animal depends upon energy consumed in excess of that for maintenance, and the requirements increase as the animal grows and fattens. Male and female cattle differ in rates of growth and fattening, but changes may be brought about by castration. There still is some concern as to the effects of market weight and energy content of rations on weight gain, feed efficiency and carcass characteristics of feedlot bulls, heifers and steers. This experiment was conducted to study these factors. Bulls ( calves and yearlings), heifers and steers were fed to one of two final weight groups. …

Storage Methods And Protein Supplements For High-Moisture Ear Corn, W.S. Swan, L.B. Embry

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

A high rate of gain can be obtained with growing and finishing cattle fed ear corn adequately supplemented with protein, minerals and vitamins. The cob portion of the ear furnishes more roughage than has been reported to result in optimum gains with minimum problems frequently associated with high-concentrate diets. Other roughages are not indicated with ear corn where high rates of gain are desired. Ear corn contains less protein than recommended in most diets for growing and finishing cattle. The low protein cob portion may not be an economical source of roughage in comparison to those considerably higher in protein …

Weaning Age And Management Systems For Fall Born Beef Calves, William Mccone

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

Seventeen registered Angus, Hereford and Shorthorn cows calved in September, 1972. The cows calved on pasture and remained on pasture until early November. From November 10 to December 29, the cows were bred for 1973 fall calves. On December 29, 1972, one-half of the calves were weaned and started on a self-fed ration. The remaining one-half of the calves were allowed to continue nursing the cows, but the calves also had access to a creep feeder containing the same ration used for the weaned calves. At the start of the experiment the calves were randomly divided by sex, breed and …

Adaptation Of Feedlot Cattle To Urea And Antibacterial Compounds, J.D. Burkhardt, L.B. Embry, L.B. Dye

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

A period of adaptation to urea during which feedlot performance is suppressed is frequently experienced when this product is added to rations of cattle not previously, or recently, fed it. This effect appears more evident with levels of urea used when it forms a major part of total protein in the ration. Urea and antibiotics in combination are common additions to protein supplements or mixed rations. At usual levels for continuous feeding of antibiotics and safe levels of urea for the dietary conditions, the combination appears satisfactory and to offer the beneficial effects from these compounds after a suitable period …

Backgrounding Of Feedlot Cattle - Levels Of Grain On Pasture, L.B. Embry

South Dakota Cattle Feeders Field Day Proceedings and Research Reports, 1973

Utilization of appreciable quantities of roughage for growing and finishing feedlot cattle means some restriction on rate of production in comparison to that obtained from diets containing more liberal quantities of concentrates. Periods of restricted growth of cattle have been shown to be followed by an accelerated rate of growth with an improvement in feed efficiency in comparison to more liberally fed animals during later finishing periods with high-concentrate diets. Thus, there can be some compensation in both rate and efficiency of gain following periods of restriction. However, the amount of compensation may vary depending upon the comparative degree and …