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Articles 811 - 840 of 866
Full-Text Articles in Biology
Geological Field Guide To The Cedar Point Biological Station, Keith County, Nebraska, Robert F. Diffendal Jr., Roger K. Pabian
Geological Field Guide To The Cedar Point Biological Station, Keith County, Nebraska, Robert F. Diffendal Jr., Roger K. Pabian
School of Natural Resources: Faculty Publications
This field guide was produced by staff members of the Conservation and Survey Division of the University of Nebraska originally in 1979 at the request of Dr. Brent Nickol, former Director of the Cedar Point Biological Station. It is an introduction to the geologic history and paleoecology of the Cedar Point area intended for students, staff, and other persons using the camp. This revision has been made some 15 years after the first version to reflect changes in ideas resulting from new data collected during that time.
Users of this guide should take care when studying the rock exposures described …
Field Notes, Jonathan L. Dunnum
Field Notes, Jonathan L. Dunnum
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Pablo M. Marquet
Specimen Catalog, Pablo M. Marquet
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog & Field Notes, Sara V. Brant
Specimen Catalog & Field Notes, Sara V. Brant
Division of Mammals - Field Notes and Catalogs
No abstract provided.
A Comparison Of Benthic Invertebrate Distributions In Four Ohio River Basin Wetlands, Michael D. Hardin
A Comparison Of Benthic Invertebrate Distributions In Four Ohio River Basin Wetlands, Michael D. Hardin
Morehead State Theses and Dissertations
A thesis presented to the faculty of the Department of Biological and Environmental Sciences at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Michael D. Hardin on April 1, 1992.
Effects Of Moose Foraging On Browse Availability In New Hampshire Deer Yards, Michael T. Pruss, Peter J. Pekins
Effects Of Moose Foraging On Browse Availability In New Hampshire Deer Yards, Michael T. Pruss, Peter J. Pekins
New Hampshire Agricultural Experiment Station Publications
Food habits of moose (Alces alces) and white-tailed deer (Odocoileus virginianus) overlap in northern New Hampshire during autumn and winter. High moose and deer densities in deer yards, where deer may be confined for extended periods, could result in competition for limited deciduous forage. The purpose of this study was to investigate possible impacts by moose on browse availability in deer yards, and the potential effects on deer. Fifteen deer yards were studied in northern New Hampshire during spring and fall, 1990-91. Unbrowsed and browsed deciduous twigs, and deer and moose pellet groups were counted on 900 permanent plots to …
Specimen Catalog, Jonathan L. Dunnum
Specimen Catalog, Jonathan L. Dunnum
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Sandra L. Brantley
Specimen Catalog, Sandra L. Brantley
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Tom A. Collins
Specimen Catalog, Tom A. Collins
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Bolivia 1991 Field Notes, Lila Alejandra Sainz-Bacherer
Bolivia 1991 Field Notes, Lila Alejandra Sainz-Bacherer
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Forrest W. Davis
Specimen Catalog, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Potential Impacts Of Biomass Production In The United States On Biological Diversity, James H. Cook, Jan Beyea, Kathleen H. Keeler
Potential Impacts Of Biomass Production In The United States On Biological Diversity, James H. Cook, Jan Beyea, Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
Biomass could be a renewable source of energy and chemicals that would not add CO2 to the atmosphere. It will become economically competitive as its cost decreases relative to energy costs, and biotechnology is expected to accelerate this trend by increasing biomass productivity. Pressure to slow global warming may also make biomass more attractive. Substantial dependence on biomass would entail massive changes in land use, risking serious reductions in biodiversity through destruction of habitat for native species. Forests could be managed and harvested more intensively, and virtually all arable land unsuitable for high-value agriculture or silviculture might be used …
Specimen List, Lila Alejandra Sainz-Bacherer
Specimen List, Lila Alejandra Sainz-Bacherer
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Robert W. Dickerman
Specimen Catalog, Robert W. Dickerman
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Reproduction In The Hispid Cotton Rat, Sigmodon-Hispidus Say And Ord (Rodentia: Muridae), In Southeastern Virginia, Robert K. Rose, Michael H. Mitchell
Reproduction In The Hispid Cotton Rat, Sigmodon-Hispidus Say And Ord (Rodentia: Muridae), In Southeastern Virginia, Robert K. Rose, Michael H. Mitchell
Biological Sciences Faculty Publications
The hispid cotton rat, Sigmodon hispidus Say and Ord, a species of the southwestern United States that has been moving northward and eastward in this century, was first observed in Virginia in 1940. In this study of the cotton rat in southeastern Virginia, most males were reproductively competent from February through November, embryos were recorded from March through October, and litter sizes were comparable to those from other locations except Kansas. Also unlike the cotton rat in Kansas, animals grew at substantial rates during the winter in Virginia. The hispid cotton rat seems to have adjusted its breeding season in …
Small Mammals In The Great Dismal Swamp Of Virginia And North Carolina, Robert K. Rose, Roger K. Everton, Jean F. Stankavich
Small Mammals In The Great Dismal Swamp Of Virginia And North Carolina, Robert K. Rose, Roger K. Everton, Jean F. Stankavich
Biological Sciences Faculty Publications
Small" mammals were surveyed in a range of habitats in the Great Dismal Swamp of Virginia and North Carolina. The survey is based on three chronologically overlapping studies, each lasting 15-18 months and for which the results have been reported separately. A different trapping method was used in each of the three studies: nest boxes, Fitch live traps, or pitfall traps. Only two species of mammals, both arboreal, were taken in nest boxes, compared with 10 and 9 species in Fitch live traps and pitfall traps, respectively. The Fitch live traps had a much higher catch rate per 1,000 trap-nights …
Field Notes, Joseph A. Cook
Field Notes, Joseph A. Cook
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Forrest W. Davis
Specimen Catalog, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Phytoplankton Composition In A Borrow Pit Lake In Virginia, Seba B. Sheavly, Harold G. Marshall
Phytoplankton Composition In A Borrow Pit Lake In Virginia, Seba B. Sheavly, Harold G. Marshall
Biological Sciences Faculty Publications
The phytoplankton assemblages in Lake Trashmore, Virginia, a borrow pit, were dominated by centric diatoms and cyanobacteria, with seasonal pulses of cryptomonads, euglenoids, and chlorophyceans. Ninety species were identified and their abundance levels noted for a 12-month period.
Field Notes, Joseph A. Cook
Field Notes, Joseph A. Cook
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Stephen Davenport
Specimen Catalog, Stephen Davenport
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Field Notes, Forrest W. Davis
Field Notes, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Field Notes, Jennifer K. Frey
Field Notes, Jennifer K. Frey
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Jennifer K. Frey
Specimen Catalog, Jennifer K. Frey
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Comparative Analysis Of The Effects Of Visual And Auditory Stimuli On Avian Mobbing Behavior, C. Ray Chandler, Robert K. Rose
Comparative Analysis Of The Effects Of Visual And Auditory Stimuli On Avian Mobbing Behavior, C. Ray Chandler, Robert K. Rose
Biological Sciences Faculty Publications
Both visual and auditory stimuli elicit avian mobbing behavior, but there is little comparative information on their isolated and additive effects. Using three combinations of two experimental stimuli (mount and tape of an Eastern Screech-Owl, Otus asio) we tested the effects of stimuli on the frequency, intensity, and duration of avian mobbing behavior. Of 169 mount-only trials, only 11 (6.5%) were successful in attracting birds. Tape-only (n = 169) and mount-and-tape (n = 170) were equally successful in attracting birds (approximately 85% of all trials), but mount-and-tape trials were more likely to initiate mobbing behavior. Birds responding …
Specimen Catalog, William L. Gannon
Specimen Catalog, William L. Gannon
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Specimen Catalog, Forrest W. Davis
Specimen Catalog, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Field Notes, Joseph A. Cook
Field Notes, Joseph A. Cook
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Field Notes, William L. Gannon
Field Notes, William L. Gannon
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Use Of Woody Vegetation By Beavers In Southeastern Virginia, John L. Echternach, Robert K. Rose
Use Of Woody Vegetation By Beavers In Southeastern Virginia, John L. Echternach, Robert K. Rose
Biological Sciences Faculty Publications
Nonbreeding and sometimes transient beavers, Castor canadensis, cut a variety of woody plants throughout the year during a 15-month study at three sites in southeastern Virginia. Ten species of trees were cut in proportions greater than would be expected according to their availabilities. Beavers heavily used viburnum, alder, ironwood, bayberry, tulip poplar, and dogwood. Winter food caches were constructed but were only lightly used.