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Articles 1 - 30 of 149
Full-Text Articles in Life Sciences
Neotoma Phenax, J. Knox Jones Jr., Hugh H. Genoways
Neotoma Phenax, J. Knox Jones Jr., Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Neotoma phenax (Merriam, 1903)
Sonoran Woodrat
Revision Of The Antillean Bats Of The Genus Brachyphylla (Mammalia: Phyllostomatidae), Pierre Swanepoel, Hugh H. Genoways
Revision Of The Antillean Bats Of The Genus Brachyphylla (Mammalia: Phyllostomatidae), Pierre Swanepoel, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Nongeographic and geographic variation have been analyzed in the genus Brachyphylla. which belongs to the Antillean endemic subfamily Phyllonycterinae of the family Phylloslomatidae. Males were found to be generally larger than females: therefore, the sexes were analyzed separately for geographic variation. External measurements except length of forearm were found to displaya high degree of individual variation. They were not used in subsequent analyses. Of cranial measurements, greatest length of skull and condylobasal length showed the least individual variation, whereas palatal length, postorbital breadth (in samples from west of the Mona Passage only), and rostral width at canines showed relatively …
Bacteriocin-Like Substances Produced By Rhizobium Japonicum And Other Slow-Growing Rhizobia, D. C. Gross, A. K. Vidaver
Bacteriocin-Like Substances Produced By Rhizobium Japonicum And Other Slow-Growing Rhizobia, D. C. Gross, A. K. Vidaver
Department of Plant Pathology: Faculty Publications
Bacteriocin-like substances were commonly produced by slow-growing Rhizobium japonicum and cowpea rhizobia on an L-arabinose medium. Antagonism between strains of R. japonicum was not detected in vitro; however, such strains were often sensitive to some bacteriocins produced by cowpea rhizobia. Inhibitory zones (2 to 8 mm from colony margins), produced by 58 of 66 R. japonicum test strains, were reproducibly detected with Corynebacterium nebraskense as an indicator. Quantitative production was not related to symbiotic properties of effective strains, since nine noninfective strains and one ineffective strain produced bacteriocin. Eight R. japonicum strains that did not produce bacteriocin nevertheless formed effective …
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist Volume 10, Number 4. December 1978
The Prairie Naturalist
THE ORNITHOGEOGRAPHY OF THE GREAT PLAINS STATES ▪ Paul A. Johnsgard
CAPTURE OF GRAY PARTRIDGE BY FALCONRY IN NORTH DAKOTA ▪ John W. Schulz
INCUBATION RHYTHMS AND EGG TEMPERATURES OF AN AMERICAN GREEN-WINGED TEAL AND A RENESTING PINTAIL ▪ Alan D. Afton
TEMPORAL PATTERNS OF SPRING MIGRATION OF YELLOW-HEADED BLACKBIRDS IN NORTH DAKOTA ▪ Richard D. Crawford
CHECKLIST OF NORTH DAKOTA MAMMALS: COMMENTS ON STATUS AND DISTRIBUTION OF SPECIES ▪ Robert W. Seabloom
NOTE
First Nesting Record of Cattle Egret and Little Blue Heron in North Dakota ▪ Lloyd A. Jones
BOOK REVIEWS
Geese of the World ▪ Carl E. …
Review Of The Desert Pocket Gopher, Geomys Arenarius (Mammalia: Rodentia), Stephen L. Williams, Hugh H. Genoways
Review Of The Desert Pocket Gopher, Geomys Arenarius (Mammalia: Rodentia), Stephen L. Williams, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
The desert pocket gopher (Geomys arenarius), which occupies a restricted geographic range in Texas, New Mexico, and Chihuahua, was examined for morphological variation. Univariate and multivariate analyses were used to determine age, sexual, individual, and geographic variation. Significant differences were found among different age classes and between sexes. Males displayed higher individual variation than females and external measurements were more variable than cranial measurements. Two subspecies--G. a. arenarius and G. a. brevirostris--were recognized after analyses of geographic variation.
The Ornithogeography Of The Great Plains States, Paul A. Johnsgard
The Ornithogeography Of The Great Plains States, Paul A. Johnsgard
Paul Johnsgard Collection
It has long been recognized that the Great Plains represent a major transition zone in the distribution patterns of North American birds; field guides traditionally have treated the 100° W. longitude meridian as a convenient dividing line between eastern and western faunas. Furthermore, this line rather neatly bisects the political subdivisions of the Great Plains, namely the "plains states" extending from North Dakota southward through South Dakota, Nebraska, Oklahoma, and Texas. Of these, Texas is the least typical, its climate and fauna is strongly influenced by the Gulf Coast on the east and the Chihuahuan desert on the west. As …
The Ornithogeography Of The Great Plains States, Paul A. Johnsgard
The Ornithogeography Of The Great Plains States, Paul A. Johnsgard
Paul Johnsgard Collection
It has long been recognized that the Great Plains represent a major transition zone in the distribution patterns of North American birds; field guides traditionally have treated the 100° W.longitude meridian as a convenient dividing line between eastern and western faunas. Furthermore, this line rather neatly bisects the political subdivisions of the Great Plains, namely the "plains states" extending from North Dakota southward through South Dakota, Nebraska, Oklahoma, and Texas. Of these, Texas is the least typical, its climate and fauna is strongly influenced by the Gulf Coast on the east and the Chihuahuan desert on the west. As a …
Whole Issue Nebraska Bird Review (December 1978) 46(4)
Whole Issue Nebraska Bird Review (December 1978) 46(4)
Nebraska Bird Review
Table of Contents
1978 (Fifty-third) Spring Migration and Occurrence Report
Notes ...................86
1978 Fall Field Day ...................86
Index of Volume XXXXVI ...................87
Index of Volume XXXXVI ...................87
Agricultural Experiment Station News December 1978
Agricultural Experiment Station News December 1978
Agricultural Research Division: News and Annual Reports
CONTENTS:
FROM THE DIRECTOR'S DESK - GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - November 1978
Review Of Parasitic Protozoa. Volume Iii: Gregarines, Haemogregarines, Coccidia, Plasmodia, And Haemoproteids. Edited By Julius P. Kreier (Academic Press, 1977), Donald W. Duszynski
Review Of Parasitic Protozoa. Volume Iii: Gregarines, Haemogregarines, Coccidia, Plasmodia, And Haemoproteids. Edited By Julius P. Kreier (Academic Press, 1977), Donald W. Duszynski
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Review of Parasitic Protozoa. Volume III: Gregarines, Haemogregarines, Coccidia, Plasmodia, and Haemoproteids. Edited by Julius P. Kreier. New York : Academic Press, 1977.
Growth Analysis Of Tall Fescue Genotypes Differing In Yield And Leaf Photosynthesis, Wallace Wilhelm, C. J. Nelson
Growth Analysis Of Tall Fescue Genotypes Differing In Yield And Leaf Photosynthesis, Wallace Wilhelm, C. J. Nelson
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Relationships between leaf photosynthesis and yield have not been well defined in forage grasses. Therefore, leaf growth, dry matter distribution, carbohydrate concentration, and growth analysis of four genotypes of tall fescue (Festuca mundinacea Schreb.) were examined. Genotypes, selected in the field for high and low CO2 exchange rate (CER) in combination with high and low yield, were compared in an attempt to study the relationship between photosynthesis and yield. In the vegetative growth stage, high yielding genotypes produced greater amounts of all plant parts (leaves, stem bases, and roots) than did low yielding genotypes; however, low yielding genotypes …
The Triumphant Trumpeter: Once Reduced To A Few Bevies, This Magnificent Swan Is On The Road To Recovery, Paul A. Johnsgard
The Triumphant Trumpeter: Once Reduced To A Few Bevies, This Magnificent Swan Is On The Road To Recovery, Paul A. Johnsgard
Papers in Ornithology
Largest of all the swans and heaviest of North American birds, the trumpeter swan is on the increase. Once common and widespread over much of the western United States, the bird was a winter resident of the lower reaches of the Mississippi Valley, Louisiana, and Texas. During the last century, however, trade in swan-skins—-used to make powder puffs and writing and drawing quills—-and the sale of eggs to collectors had a heavy impact on the species. In the period from 1853 to 1877, for example, London sales of trumpeter swan-skins imported through the Hudson's Bay Company totaled nearly 18,000, an …
Agricultural Experiment Station News November 1978
Agricultural Experiment Station News November 1978
Agricultural Research Division: News and Annual Reports
CONTENTS:
FROM THE ACTING DIRECTOR'S DESK
GREETINGS FROM THE FROLIKS
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – October 1978
An Analysis Of Hair Structure And Its Phylogenetic Implications Among Heteromyid Rodents, Jacqueline A. Homan, Hugh H. Genoways
An Analysis Of Hair Structure And Its Phylogenetic Implications Among Heteromyid Rodents, Jacqueline A. Homan, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Hair morphology of 36 species of the family Heteromyidae including the genera Dipodomys, Perognathus, Microdipodops, Liomys, and Heteromys was studied using both light and scanning electron microscopy. Variables investigated included length and width of hair, imbricate scale pattern, external and cross-section form of hair, and medullary characteristics. Although the hair of individual species could be characterized with detailed study, we do not believe that hair structure will be of value in evolutionary studies of this group below the generic level. The overhair of heteromyid rodents falls into two morphological types-hair which is round to oval in …
Effect Of Cold Acclimation On Cold Tolerance Of Laboratory-Reared Diapausing Pink Bollworms, Robert J. Wright, H. M. Graham
Effect Of Cold Acclimation On Cold Tolerance Of Laboratory-Reared Diapausing Pink Bollworms, Robert J. Wright, H. M. Graham
Department of Entomology: Faculty Publications
Cold acclimation and cold tolerance were studied in laboratory-reared diapausing pink bollworms, Pectinophora gossypiella (Saunders), conditioned at 5°, 10°, and 15° C for 2,4, and 8 wk. Larval mortality, abnormal pupation and total mortality from 2-h exposure to sub-zero temperatures increased similarly as the temperature decreased from _6° to -15° C. Exposure to -9° C and above had little effect. The effect of cold conditioning on cold tolerance was most important at the _12° C exposure. Conditioning at 5°, 10°, and 15° C reduced total mortality after exposure to _12° C, compared to unconditioned larvae. Conditioning of larvae at 10° …
Farm, Ranch And Home Quarterly Institute Of Agriculture And Natural Resources, University Of Nebraska- Lincoln
Farm, Ranch and Home Quarterly
In this issue:
From the Vice Chancellor ................... 2
EFNEP Teachers Learn, Too ............................... 3
Learning to Live with Death....................... 4
How Prepared Were They to Teach?............................ 7
Effects of Production, Marketing Choices....................... 9
Close Rows Can Boost Yields .............................. 11
Financial Choices in Wheat Farming ........................ 13
Black Walnut is Prized Crop ............................... 15
Profits Fly Out When Insects Invade Stored Grain ............ 17
Computer Makes Drapery Calculations Easier ................ 19
Two New Species Of Acanthobothrium Van Beneden 1849 (Cestoidea: Tetraphyllidea) From Freshwater Stingrays In South America, Monte A. Mayes, Daniel R. Brooks, Thomas B. Thorson
Two New Species Of Acanthobothrium Van Beneden 1849 (Cestoidea: Tetraphyllidea) From Freshwater Stingrays In South America, Monte A. Mayes, Daniel R. Brooks, Thomas B. Thorson
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Two new species of Acanthobothrium are reported from freshwater stingrays in northern South America. Acanthobothrium quinonesi sp. n. is described from Potamotrygon magdalenae Dumeril collected from the Magdalena River in northern Colombia and A. amazonensis sp. n. from P. circularis Garman collected in the Itacuai River of northwestern Brazil. Acanthobothrium quinonesi differs from A. amazonensis by having a smaller and anteriorly-curved cirrus sac, 43-60 rather than 50-72 testes, and bothridial hooks 100-142 μm long rather than 145-184 μm long. Characters used in the taxonomy of Acanthobothrium species are listed to show that the new species resemble each other and A. …
Agricultural Experiment Station News October 1978
Agricultural Experiment Station News October 1978
Agricultural Research Division: News and Annual Reports
CONTENTS:
FROM THE DIRECTOR'S DESK
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - September 1978
BULLETINS PRINTED
Purification Of The Protein Crystal From Bacillus Thuringiensis By Zonal Gradient Centrifugation, Kenneth W. Nickerson, Barabara J. Ang
Purification Of The Protein Crystal From Bacillus Thuringiensis By Zonal Gradient Centrifugation, Kenneth W. Nickerson, Barabara J. Ang
Papers in Microbiology
A method is described for the large-scale purification of the Bacillus thuringiensis protein crystal by zonal gradient centrifugation. NaBr gradients are employed in a Beckman J21-B centrifuge equipped with a JCF-Z rotor.
Bats Are Beautiful, Hugh H. Genoways, Robert J. Baker
Bats Are Beautiful, Hugh H. Genoways, Robert J. Baker
University of Nebraska State Museum: Mammalogy Papers
The thought that "Bats are Beautiful" may bring a smile to your face as you think of these ugly little creatures hanging from the ceilings of haunted houses and flying around deserted bell towers at midnight. You may also remember old wives tales such as "all bats have rabies" or "bats try to fly into women's hair." None of these things is completely true, and some of the tales have no basis in fact whatsoever.
Actually, the 875 species of bats form a unique Order of mammals (those animals possessing hair at least somewhere on their bodies), since they are …
The Prairie Naturalist Vol. 10, No. 3. September 1978
The Prairie Naturalist Vol. 10, No. 3. September 1978
The Prairie Naturalist
NOTES ON DISTRIBUTION OF THREE SPECIES OF MAMMALS IN SOUTH DAKOTA ▪ J. K. Jones, Jr., J. R. Choate and R. B. Wilhelm
A MID-CONTINENT IRRUPTION OF CANADA LYNX, 1962-63 ▪ H. L. Gunderson
CHECKLIST OF NORTH DAKOTA MAMMALS (REVISED) ▪ J. M. Wiebe and J. F. Cassel
DECLINE OF YEAR-CLASS STRENGTH OF BUFFALO FISHES IN LAKE SAKAKAWEA, NORTH DAKOTA ▪ D. W. Willis and J. B. Owen
NOTE
Pileated Woodpecker Eating Russian Olive Fruits ▪ R. S. McVoy
BOOK REVIEWS
Birds of the Prairie Provinces ▪ W. J. Maher
Wildlife of the Prairies ▪ C. R. Grondahl
Distribution Patterns …
Leaf Growth, Leaf Aging, And Photosynthetic Rate Of Tall Fescue Genotypes, Wallace Wilhelm, C. J. Nelson
Leaf Growth, Leaf Aging, And Photosynthetic Rate Of Tall Fescue Genotypes, Wallace Wilhelm, C. J. Nelson
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Leaf growth and leaf aging both influence the total amount of CO, fixed by a particular leaf in the canopy during its photosynthetically productive life. Four genotypes of tall fescue (Festuca arundinacea Schreb.) were selected for all combinations of high and low COB exchange rates (CER) and yield. The purpose of this study was to determine CER during aging and leaf growth rates of tall fescue genotypes in growth chambers and in the field on a Mexico silt loam (Udollic Ochraqualfs; fine, montmarillonitic, mesic). Leaf growth of vegetative tillers in controlled environments was continuous throughout the day for all …
A Mid-Continent Irruption Of Canada Lynx, 1962-63, Harvey L. Gunderson
A Mid-Continent Irruption Of Canada Lynx, 1962-63, Harvey L. Gunderson
University of Nebraska State Museum: Mammalogy Papers
There was a mid-continent irruption of the Canada lynx (Felis lynx) population and subsequent extensive movement into non-lynx habitats during the years 1962-1963. Lynx were found in the prairie provinces of Canada and the prairie areas of Minnesota, and North and South Dakota. They were also found in urban areas such as Minneapolis and St. Paul, Minnesota: Winnipeg, Manitoba: and Calgary, Saskatchewan, Canada. Causes for the irruption remain unknown but speculations include primarily a change in snowshoe hare population, disease, extensive forest fires and extensive spraying. Unusual behavior seemed to be most often reflected by a lack of …
Notes On Distribution Of Three Species Of Mammals In South Dakota, J. Knox Jones Jr., Jerry R. Choate, Robert B. Wilhelm
Notes On Distribution Of Three Species Of Mammals In South Dakota, J. Knox Jones Jr., Jerry R. Choate, Robert B. Wilhelm
University of Nebraska State Museum: Mammalogy Papers
No definitive account of the mammals of South Dakota has been published and, therefore, the distribution of species occurring in that state is relatively poorly documented save for several geographically restricted faunal studies (Andersen and Jones 1971, on Harding County, Findley 1956, on Oay County, and Turner 1974, on the Black Hills, for example). Our own work in South Dakota began almost two decades ago, but in recent years has focued primarily on the unique environmental area in southern Bennett County. Three species of mammals for which we have important unpublished distributional records from the state are the eastern mole, …
Whole Issue Nebraska Bird Review (September 1978) 46(3)
Whole Issue Nebraska Bird Review (September 1978) 46(3)
Nebraska Bird Review
TABLE OF CONTENTS
The First Eleven Years of Breeding Bird Surveys in Nebraska ...............38
Notes ................62
Book Review ....................64
Proposed Critical Habitat For The Whooping Crane
Proposed Critical Habitat For The Whooping Crane
Endangered Species Bulletin
The Service proposes eight additional areas as critical habitat in Kansas, Montana, Nebraska. North Dakota, and South Dakota for the endangered whooping crane (Grus americana) to those areas already determined to be critical habitat as published in the FEDERAL REGISTER of May 15, 1978 (43 FR 20938). If finalized, this rule would provide Federal protection of these areas under section 7 of the Endangered Species Act of 1973 and will further assure the conservation of the whooping crane.
Forage Quality Evaluations Of Twelve Grasses In Relation To Season For Grazing, L. C. Newell, W. J. Moline
Forage Quality Evaluations Of Twelve Grasses In Relation To Season For Grazing, L. C. Newell, W. J. Moline
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
A study of forage quality in relation to seasonal yield of important perennial forage grasses was initiated to provide information and to promote a better understanding of their best use for grazing. This information should be particularly valuable in planning seasonal use of pure stands or mixtures of grasses.
Agricultural Experiment Station News August 1978
Agricultural Experiment Station News August 1978
Agricultural Research Division: News and Annual Reports
CONTENTS:
FROM THE ACTING DIRECTOR'S DESK
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - July 1978
BULLETINS PRINTED
Experimental Transmission Of Sarcocystis From Icterid Birds To Sparrows And Canaries By Sporocysts From The Opossum, Edith D. Box, Donald W. Duszynski
Experimental Transmission Of Sarcocystis From Icterid Birds To Sparrows And Canaries By Sporocysts From The Opossum, Edith D. Box, Donald W. Duszynski
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Cowbirds (Molothrus ater) and grackles (Cassidix mexicanus) infected with muscle cysts of Sarcocystis were fed to opposums (Didelphis virginiana) and fecal sporocysts from the latter were given to sparrows (Passer domesticus, Family Ploceidae), canaries (Serinus canarius, Family Fringillidae) and ducks (Anas platyrhynchos, Family Anatidae). Asexual parasites were found in the endothelium of sparrows and canaries but not in ducks. When birds were kept 10 weeks or more after infection, muscle cysts were found grossly and microscopically in the majority of sparrows, and in 1 canary, but not in …
Acanthobothrium Electricolum Sp. N. And A. Lintoni Goldstein, Henson, And Schlicht 1969 (Cestoda: Tetraphyllidea) From Narcine Brasiliensis (Olfers) (Chondrichthyes: Torpedinidae) In Colombia, Daniel R. Brooks, Monte A. Mayes
Acanthobothrium Electricolum Sp. N. And A. Lintoni Goldstein, Henson, And Schlicht 1969 (Cestoda: Tetraphyllidea) From Narcine Brasiliensis (Olfers) (Chondrichthyes: Torpedinidae) In Colombia, Daniel R. Brooks, Monte A. Mayes
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Acanthobothrium lintoni and a new species of Acanthobothrium are reported from the lesser electric ray Narcine brasiliensis in Colombia. The new species resembles all other members of the genus parasitizing torpedinids by having a relatively small scolex, long and spinose cephalic peduncle, fewer than 75 testes per proglottid, an indistinct genital atrium, and V-shaped ovaries with ovarian lobes of equal length which do not reach the posterior margin of the cirrus sac. The new species differs from all known species by having bothridial hooks only 46 to 64 μm in total length. A key to the species of Acanthobothrium parasitizing …