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Articles 1 - 30 of 47
Full-Text Articles in Animal Sciences
Cytotypes And Morphometrics Of Two Phyllostomatid Bats, Micronycteris Hirsuta And Vampyressa Pusilla, Robert J. Baker, Hugh H. Genoways, William J. Bleier, Jerry W. Warner
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
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 …
Whole Issue Nebraska Bird Review (December 1973) 41(4)
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
Post-Settlement Land Uses And Their Effects On The Cedarburg Bog, Nevin J. Farley, Peter J. Salamun
Post-Settlement Land Uses And Their Effects On The Cedarburg Bog, Nevin J. Farley, Peter J. Salamun
Field Station Bulletins
During a study of the plant species of a lowland hardwood stand at the western edge of the Cedarburg Bog (Farley, 1973), it was noted that significant environmental changes had occurred here and throughout the bog which resulted in the present-day vegatation patterns. Many of these changes can be attributed to the various post-settlement land-use practices which were employed in the Town of Saukville (TllN, R21E), Ozaukee County, Wisconsin, where this bog is located. To document this information a literature survey was made of the various studies which ha ve been carried out in this area (Cutler, 1936; Grittinger, 1969; …
Prairie Establishment At The Field Station, Philip B. Whitford
Prairie Establishment At The Field Station, Philip B. Whitford
Field Station Bulletins
Early in the development of the Cedar-Sauk Field Station it was decided to attempt establishing a sample of prairie vegetation as an experimental and demonstration project. Although none of the field station land had prairie soil and the nearest site of original native prairie was probably at least twenty miles distant, we felt that this area was close enough to the original prairies climatically so that most of the prairie species native to southeastern Wisconsin should be able to survive. If even moderately successful, it would provide an additional habitat for studies of animal life at the station, a demonstration …
Breeding Birds Of The Forested Portions Of Cedarburg Bog, Charles M. Weise
Breeding Birds Of The Forested Portions Of Cedarburg Bog, Charles M. Weise
Field Station Bulletins
In 1971 the Wisconsin Scientific Areas Preservation Council inaugurated a program of annual breeding bird surveys in the various state scientific areas, carried out by members of the Wisconsin Society for Ornithology and coordinated by Mrs. Evelyn Warner. The object is to provide documented quantitative data for assessment of bird population trends, specifically as an index to possible environmental deterioration. The upland deciduous (maple-beech) woods at the UWM Field Station and a large part of the adjacent Cedarburg Bog are included in the scientific areas system, destined for preservation with minimal management for scientific research and education. As part of …
Whole Issue Nebraska Bird Review (September 1973) 41(3)
Whole Issue Nebraska Bird Review (September 1973) 41(3)
Nebraska Bird Review
TABLE OF CONTENTS
1973 (Forty-eighth) Spring Migration and Occurrence Report ....................46
Eutrophication Field Trip.................... 66
Notes ....................66
Book Review ....................68
Nongeographic Variation In The Long-Nosed Bat, Choeroniscus Intermedius, Hugh H. Genoways, Robert J. Baker, Bernard Wyatt
Nongeographic Variation In The Long-Nosed Bat, Choeroniscus Intermedius, Hugh H. Genoways, Robert J. Baker, Bernard Wyatt
University of Nebraska State Museum: Mammalogy Papers
Of the 12 measurements analyzed, only length of tail exhibited enough individual variation to warrant its deletion in analysis of geographic or interspecific variation in the genus Choeroniscus. Also, because of the difficulty in consistently taking the measurement, we also suggest elimination of postorbital constriction.
Specimens of Choeroniscus intermedius were found to exhibit significant secondary sexual variation in five of the 12 measurements studied. Therefore, it is clear that males and females should be separated in analyses of variation within members of the genus. Females were found to be the larger in 10 of the 12 measurements--similar to the …
Effects Of A Nuclear Detonation On Arthropods At The Nevada Test Site, Dorald M. Allred
Effects Of A Nuclear Detonation On Arthropods At The Nevada Test Site, Dorald M. Allred
Brigham Young University Science Bulletin, Biological Series
Fifty-three arthropod species were studied in an area affected by an underground nuclear detonation. These were represented by 10 species of ants, 17 beetles, 5 orthopterans, 4 scorpions, 6 solpugids, and 11 spiders (Table 16). Relative populations were determined prior to the detonation and at three periods after the detonation–(1) one and two months after (August and September 1962), (2) 11 months after (June 1963), and (3) 13 months after (August 1963). One and two months after the detonation, the number of species was reduced from the expected by 48 percent, by 52 percent after 11 months, and by 66 …
Front Matter, Vol. 18 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 18 No. 4
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A Simulation Model Of Peromyscus Leucopus In An Area Of The Great Dismal Swamp, James E. Paschal Jr.
A Simulation Model Of Peromyscus Leucopus In An Area Of The Great Dismal Swamp, James E. Paschal Jr.
Biological Sciences Theses & Dissertations
A computer simulation model was developed to explain the population dynamics of the white-footed mouse (Peromyscus leucopus) in an area of the Great Dismal Swamp. The model was designed to provide an experimental base for future studies. The model indicates relationships between food availability, home range size, competition with Peromyscus nuttali habitat selection and reproduction.
White-footed mice were trapped in the Old Dismal Town site during each season from April, 1972 through March, 1973. The age-sex structure of the population was determined, and was compared with the simulated structure. Although there were significant discrepancies between the comparisons, the …
Ardops Nichollsi, J. Knox Jones Jr., Hugh H. Genoways
Ardops Nichollsi, J. Knox Jones Jr., Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Order Chiroptera, Family Phyllostomatidae, Subfamily Stenoderminae. The genus Ardops is monotypic (Jones and Schwartz, 1967) as treated below.
An Ecological Survey Of The Algae Of Huntington Canyon, Utah, Lorin E. Squires, Samuel R. Rushforth, Carol J. Endsley
An Ecological Survey Of The Algae Of Huntington Canyon, Utah, Lorin E. Squires, Samuel R. Rushforth, Carol J. Endsley
Brigham Young University Science Bulletin, Biological Series
A quantitative and ecological study of the algae of Huntington Canyon, Emery County, Utah, was conducted from March 1971 to April 1972. Net plankton, nannoplankton, periphyton, and visible attached algae were studied. Certain physical and chemical parameters in the waters of Huntington Creek and a small pond along its course were also measured.
Huntington Creek contains a wide diversity of genera and species of algae. Diatoms are the main constituent of the flora of this stream throughout the year. Hydrurus foetidus is prevalent in Huntington Creek from late winter to early summer, and filamentous blue green algae abound in the …
Breeding Ecology Of Raptors In The Eastern Great Basin Of Utah, Dwight G. Smith, Joseph R. Murphy
Breeding Ecology Of Raptors In The Eastern Great Basin Of Utah, Dwight G. Smith, Joseph R. Murphy
Brigham Young University Science Bulletin, Biological Series
A comparative study of the breeding ecology of 12 raptor species was conducted in the eastern Great Basin from 1967-1970. The project was designed to determine the composition and densities, habitat selection, territoriality and predatory habits of raptorial birds in a semiarid environment. All topics were analyzed comparatively, relating the requirements and activities of the 12 raptor species.
Average yearly population densities of all species approximated 0.5 pairs per square mile, but much of the available habitat was not utilized. Predominant raptors were the Ferruginous Hawk and Great Horned Owl. Other important raptors included the Golden Eagle, Red-tailed Hawk and …
The Peregrine Falcon In Utah, Emphasizing Ecology And Competition With The Prairie Falcon, Richard D. Porter, Clayton M. White
The Peregrine Falcon In Utah, Emphasizing Ecology And Competition With The Prairie Falcon, Richard D. Porter, Clayton M. White
Brigham Young University Science Bulletin, Biological Series
This study was undertaken to record the known history of the Peregrine Falcon (Falco peregrinus) in Utah as we have been able to construct it from both the literature and from our original research that extends over about a 30-year period in the state. The present total population of the peregrine in Utah is possibly only 10 percent of what it has been in historic times. In an effort to find explanations for the decline, we have explored hypotheses of climatic changes, impact of pesticides, disease, and human disturbances. We conclude that pesticide contamination and climatic changes may …
Front Matter, Vol. 18 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 18 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 18 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 18 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 18 No. 1
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 18 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Whole Issue Nebraska Bird Review (June 1973) 41(2)
Whole Issue Nebraska Bird Review (June 1973) 41(2)
Nebraska Bird Review
Table of Contents
Honorary Member - Carl H. Swanson ... 22
The Seventy-second Annual Meeting ... 23
The Yellow Rail in Nebraska ... 24
1972 (Fifteenth) Fall Occurrence Report ... 28
Notes ... 42
Fish Fauna Of The Hatchie River System, Wayne Calvin Starnes
Fish Fauna Of The Hatchie River System, Wayne Calvin Starnes
Masters Theses
This thesis reports the findings of an ichthyofaunal survey of the Hatchie River system of northern Mississippi and southwestern Tennessee. This system represents the only drainage in that region which has not undergone large scale channelization, and it had previously been poorly collected. This survey was conducted mainly during August of 1972 with additional collections from other years also reported. Collections were made from the majority of streams in the entire drainage, and several methods were employed including seining, gill netting, trap nets, and the principal method, chemical application. A total of 108 collections is included, and the findings are …
Annotated Checklist Of Mammals Of The Yucatan Peninsula, Mexico. I. Chiroptera, J. Knox Jones Jr., James Dale Smith, Hugh H. Genoways
Annotated Checklist Of Mammals Of The Yucatan Peninsula, Mexico. I. Chiroptera, J. Knox Jones Jr., James Dale Smith, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Our field investigations on the Yucatán Peninsula were initiated in the summer of 1962 when two field parties from the Museum of Natural History at the University of Kansas visited the area. One field party consisted of W.E. Duellman and six students enrolled in a summer field course in vertebrate zoology; the other party was composed of the senior author and four students who were conducting a survey of Middle American terrestrial vertebrates and their ectoparasites. Some of the data relative to ectoparasites obtained during this study have appeared in the publications of Emerson (1971), Kohls et al. (1965), Loomis …
Rate Of Growth Of Tamarack (Larix Tarcina) In Cedarburg Bog, Cynthia Meyer
Rate Of Growth Of Tamarack (Larix Tarcina) In Cedarburg Bog, Cynthia Meyer
Field Station Bulletins
This study was undertaken to determine the influence of bog conditions on growth rate of tamarack (Larix larcina). The Cedarburg Bog in Ozaukee County, Wisconsin presents a unique opportunity for such study since it includes the southernmost string bog in the United States (Grittinger, 1970). My results demonstrate very slow growth of tamarack in Cedarburg Bog both in diameter and height. Differences in growth rates depend on the particular area of the bog, aeration, and mineral availability. As indicated by other studies, much more work is needed to determine how various factors affect growth of trees as well as other …
Black-Capped Chickadee Behavior-Fledging To Dispersal, Mary Van Male
Black-Capped Chickadee Behavior-Fledging To Dispersal, Mary Van Male
Field Station Bulletins
Most studies of the family life of young birds after they leave the nest have been descriptive and anecdotal with little quantitative behavioral data, despite the many interesting problems involved in interactions of the members of a family. The objectives of this study were to determine: 1) the behavior of parents and young Black-capped Chickadees (Parus atricapillus) at the time of leaving the nest, 2) how the parents and young behave towards each other during the period when the young are dependent on their parents, 3) the factors responsible for the final disruption of the family. Since aggression was anticipated …
Submergent Macrophytes In Theresa Marsh, James Mcnelly, Jeffrey Klopatek
Submergent Macrophytes In Theresa Marsh, James Mcnelly, Jeffrey Klopatek
Field Station Bulletins
Marshes form the interface between upland and aquatic systems and, like most transitional zones, provide habitat diversity which may support a great variety of life. Marshes may act as valves or sinks to regulate the flow of mineral nutrients from terrestrial systems (especially from agricultural or urban systems) to aquatic zones. Freshwater marshes and wetlands are ranked with coastal estuaries as highly productive areas and play an important role in converting the sun's energy to organic matter.
Limnodrilus Hoffmeisteri: Observations Of The Coelomic Cells And Stage I Sperm Under Laboratory Conditions, Field Conditions, And After Exposure To Several Levels Of Radiation, Edward Michael Block
Limnodrilus Hoffmeisteri: Observations Of The Coelomic Cells And Stage I Sperm Under Laboratory Conditions, Field Conditions, And After Exposure To Several Levels Of Radiation, Edward Michael Block
Masters Theses
No abstract provided.
Whole Issue Nebraska Bird Review (March 1973) 41(1)
Whole Issue Nebraska Bird Review (March 1973) 41(1)
Nebraska Bird Review
TABLE OF CONTENTS
1972 Treasurer's Report ................2
1972 Nebraska Nesting Survey ................3
1972 Christmas Count ................9
Louisiana Heron in Clay County ................14
Monk Parakeets in Omaha................ 15
Summer Records of the Short-billed Marsh Wren in Nebraska ................17
Notes ................19