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Articles 17611 - 17640 of 19683
Full-Text Articles in Entire DC Network
Community Structure Of The Macrobenthos In Back Bay, Virginia, Michael F. Lane
Community Structure Of The Macrobenthos In Back Bay, Virginia, Michael F. Lane
Biological Sciences Theses & Dissertations
A study of the subtidal macrobenthos in Back Bay, Virginia was conducted to examine community structure in relation to sedimentary and water quality characteristics. Samples were collected in August and November of 1987 and February and May of 1988 at ten stations.
Three site groups and three temporal groups were identified by cluster analyses of species abundance. Species composition between site groups was relatively homogeneous and eight species accounted for most of the variation between site groups. A comparison of plots of the biological and physical data in discriminant space suggested that variations in the biological data between site groups …
Population Dynamics Of Feral House Mice And Meadow Voles On A Dredge Disposal Site, Georgia E. Kratimenos
Population Dynamics Of Feral House Mice And Meadow Voles On A Dredge Disposal Site, Georgia E. Kratimenos
Biological Sciences Theses & Dissertations
The population dynamics of two species was studied for one year on Craney Island in Portsmouth, Virginia. This dredge disposal site provided good habitat for the house mouse, Mus musculus, whose opportunistic behaviors can withstand the sudden changes in a dynamic environment. Although the site was not optimal habitat, a population of Microtus pennsylvanicus, the meadow vole, was sustained there. Of the seven species of small mammals captured, 65% were house mice and 28% were meadow voles. Meadow voles were more successful at establishing short periods of residency than were house mice; on average, each meadow vole was …
The Prairie Naturalist Volume 23, No. 3. September 1991
The Prairie Naturalist Volume 23, No. 3. September 1991
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
ANTIPREDATOR BEHAVIOR OF MOUNTAIN PLOVER CHICKS ▪ T A. Sordahl
USING AERIAL MARKING FOR ASSESSING POPULATION DYNAMICS OF LATE SUMMER ROOSTING RED-WINGED BLACKBIRDS ▪ C. M. Linz, C. E. Knittle, J. L. Cummings, J. E. Davis, Jr. , D. L. Otis, and D. L. Bergman
DISPERSAL OF THE MEADOW JUMPING MOUSE IN NORTHERN KANSAS ▪ J. R. Choate, D. W. Moore, and J. K. Frey
DIET, HOME RANGE, MOVEMENTS, AND ACTIVITY PERIODS OF SWIFT FOX IN NEBRASKA ▪ T D. Hines and R. M. …
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.
A Discussion Of Options For Effort Reduction., Southern Demersal Gillnet And Demersal Longline Fishery Management Advisory Committe
A Discussion Of Options For Effort Reduction., Southern Demersal Gillnet And Demersal Longline Fishery Management Advisory Committe
Fisheries Management Papers
The committee prefers to reduce effort in the fishery by improving the effectiveness of the 50 per cent reduction on transfer rule. To do this it is necessary to prevent the use of lease arrangements which act as a form of transfer.Some consideration could also be given to encouraging transfer of licences by protecting purchased units against further effort reductions. The Minister for Fisheries has determined that ownership statement must be completed prior to licence renewal each year. It is hoped that this will prevent licence holders from using lease arrangements to effect transfers and so avoid the loss of …
Use Of Pollen Concentration In Paleopharmacology: Coprolite Evidence Of Medicinal Plants, Karl Reinhard, Donny L. Hamilton, Richard H. Hevly
Use Of Pollen Concentration In Paleopharmacology: Coprolite Evidence Of Medicinal Plants, Karl Reinhard, Donny L. Hamilton, Richard H. Hevly
Karl Reinhard Publications
Nearly 2,400 plant species have been documented ethnographically as having medicinal value among Native Americans. Therefore, it is not surprising that evidence of medicinal plants appears in some of the over 1,000 coprolites analyzed from the southwestern U.S. Three medicinal species identified in pollen analysis of coprolites are discussed. Willow (Salix) is the most common analgesic in the Native American pharmacopoeia. Prehistoric use of this plant is documented in coprolites from Bighorn Cave in the Black Mountains of Arizona and also in a burial from the Mimbres Valley, New Mexico. Historically, Mormon tea (Ephedra) served as …
Nitrogen Dynamics Of The Acacia Senegal Agroforestry System In The Sudan, Zakaria Abdalla Mohammed Saad
Nitrogen Dynamics Of The Acacia Senegal Agroforestry System In The Sudan, Zakaria Abdalla Mohammed Saad
Biological Sciences Theses & Dissertations
The savanna is characterized by low rainfall, poor soil and vegetation types dominated by the Genus Acacia. Agroforestry systems evolved, the most notable of which is Acacia senegal agroforestry system (ASAS). It yields gum acacia, fuel and fodder and improved soil N, P, and pH and stability against erosion.
This study investigated the climatic, edaphic and biotic interactions of the ASAS that govern the nutrient dynamics, mainly N, and biomass. The effects of limited resources of soil, space and photoperiod on biomass, nodulation and rate of N fixation were investigated. Genetic differences among populations were studied. Progenies of selected …
The Prairie Naturalist Volume 23, No. 2. June 1991
The Prairie Naturalist Volume 23, No. 2. June 1991
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Sea bloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
SMALLMOUTH BASS SIZE STRUCTURE AND CATCH RATES IN FIVE SOUTH DAKOTA LAKES AS DETERMINED FROM TWO SAMPLING GEARS ▪ C. L. Milewski and D. W. Willis
REPRODUCTION BY FISHES IN A HEADWATER STREAM FLOWING INTO GRAYROCKS RESERVOIR, WYOMING ▪ W. A. Hubert and D. T O’Shea
ENVENOMATION AND ACQUISITION OF CHEMICAL INFORMATION BY PRAIRIE RATTLESNAKES ▪ D. Chiszar, C. Hobika, H. M. Smith, and J. Vidaurri
MOVEMENTS AND HABITAT USE BY WILD TURKEY HENS WITH BROODS IN A GRASSLAND-WOODLAND MOSAIC IN THE NORTHERN …
Specimen Catalog, Forrest W. Davis
Specimen Catalog, Forrest W. Davis
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Effect Of Straw On The Behaviour Of Growing Pigs, David Fraser, P. A. Phillips, B. K. Thompson, T. Tennessen
Effect Of Straw On The Behaviour Of Growing Pigs, David Fraser, P. A. Phillips, B. K. Thompson, T. Tennessen
Social Behavior Collection
The effects of straw on the behaviour of young growing pigs were studied in two experiments. In Experiment 1, group of three pigs, aged about 7 weeks, were housed in raised decks with or without straw bedding. Time-lapse video recording showed no major differences between treatments in the amount or daily pattern of overall activity and feeding. Detailed observations showed that bedding reduced the incidence of rooting and chewing on pen-mates, but had little effect on other social activities such as mounting and aggressive biting. Experiment 2 compared groups of eight growing pigs aged about 10 weeks, housed in floor …
The Future For Recreational Fishing Final Report Of The Recreational Fishing Advisory Committee, Recreational Fishing Advisory Committee
The Future For Recreational Fishing Final Report Of The Recreational Fishing Advisory Committee, Recreational Fishing Advisory Committee
Fisheries Management Papers
This report discusses: What Recreational fishing means to Western Australia's estimated 300,000 fishers. Conservation and equality in catch sharing was at the heart of the Committee's investigations into developing strategies for the future management of important recreational fish stocks.
The Ecology Of Franklin's Ground Squirrel In Indiana, Peter M. Benjamin
The Ecology Of Franklin's Ground Squirrel In Indiana, Peter M. Benjamin
All-Inclusive List of Electronic Theses and Dissertations
A reduction in the distribution of the Franklin's ground squirrel in the eastern portion of its range has led to its classification as a threatened species in Indiana. Information is lacking on this species' habitat requirements and population characteristics in Indiana, which limits management capabilities. The purpose of this study was to identify preferred habitat and population characteristics of the Franklin's ground squirrel in Indiana. Radio telemetry was conducted from April 1987 to September 1988 at 3 sites along a railroad right-of-way (ROW} in Benton County, Indiana. Land use and habitat types were mapped; species composition, density, percent cover, percent …
Phyletic Coevolution Between Subterranean Rodents Of The Genus Ctenomys (Rodentia: Hystricognathi) And Nematodes Of The Genus Paraspidodera (Heterakoidea: Aspidoderidae) In The Neotropics: Temporal And Evolutionary Implications, Scott Lyell Gardner
Harold W. Manter Laboratory of Parasitology: Faculty Publications
Coevolution was studied in six species of rodents of the genus Ctenomys and their parasitic nematodes of the genus Paraspidodera, collected in Bolivia. Representatives of the families Octodontidae and Caviidae were used as outgroups for the mammals, and nematodes from caviids were used as outgroups of the nematodes from ctenomyids. For the nematodes, quantitative and qualitative morphological characteristics of both males and females and electrophoretic characters of both sexes were used to generate phylogenetic hypotheses of evolutionary relationships of the OTUs occurring in hosts of different species. Concordance estimates of cladograms generated from biochemical-genetic and morphological data of the …
Landscape Plants, Forest Trees, And Crops Most Resistant To Mammal Damage: An Overview, Rex E. Marsh
Landscape Plants, Forest Trees, And Crops Most Resistant To Mammal Damage: An Overview, Rex E. Marsh
Great Plains Wildlife Damage Control Workshop Proceedings
To capitalize on mammal-resistant plants, several approaches may be taken. The most common is to select crops not highly prone to mammal damage (i.e., resistant crops). If a generally susceptible crop is to be grown, the more resistant varieties or cultivars of that crop can be selected, if known. An approach that has not received the attention it warrants is the selection of parent stock with resistant characteristics and the selective breeding of useful species to develop strains, hybrids, or cultivars with improved mammal resistance. For several reasons, this latter approach shows the most promise for forest tree species. It …
The Prairie Naturalist Volume 23, No. 1. March 1991
The Prairie Naturalist Volume 23, No. 1. March 1991
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
AGRICULTURAL LAND USE AND MOURNING DOVES IN EASTERN COLORADO: IMPLICATIONS FOR NESTING AND PRODUCTION IN THE GREAT PLAINS ▪ T E. Olson, C. E. Braun, and R. A. Ryder
DISTRIBUTION OF SANDHILL CRANES IN THE NORTH PLATTE RIVER VALLEY 1980 AND 1989 ▪ M. J. Folk and T. C. Tacha
NOCTURNAL BEHAVIOR OF SANDHILL CRANES ROOSTING IN THE PLATTE RIVER, NEBRASKA ▪ B. S. Norling, S. H. Anderson, and W A. Hubert
LEAD POISONING OF A MARBLED GODWIT ▪ L. N. Locke, M. R. …
Origin Of The Human Family, Russell W. Maatman
Total Body Water And Body Composition In Phalaropes And Other Birds, Hugh I. Ellis, Joseph R. Jehl Jr
Total Body Water And Body Composition In Phalaropes And Other Birds, Hugh I. Ellis, Joseph R. Jehl Jr
Biology: Faculty Scholarship
Contrary to some reviews, total body water (TBW) may fall below the expected value of about 65% in birds if measured as a percentage of total body mass. However, water constitutes a relatively stable proportion (659%-70%) of body composition when measured as a percentage of lean body mass (LBM). We demonstrate this by using data from two migratory phalaropes (Phalaropus tricolor and Phalaropus lobatus), which exhibit inverse relationships between TBW and body mass and between TBW and fat content. As the phalaropes fatten before migration, lipids increase but not at the expense of water, which also increases with gains in …
Protecting Forests For Wildlife, Robert A. Askins
Protecting Forests For Wildlife, Robert A. Askins
Biology Faculty Publications
The subject of managing forests for wildlife is being viewed from a new perspective, a perspective that has developed primarily as a result of studies of forest-interior birds. Forest-interior birds are dependent to a large extent on how forest lands are managed. They are essentially forest specialists and are not normally seen in open areas such as the suburbs, open fields or meadows. In Connecticut and other parts of the northeastern United States, most forest-interior birds are members of one taxonomic group, the wood warblers.
Rx For Success At Back Bay National Wildlife Refuge: Take Two Committed Partners-Add Water, Janet Taylor, Julia Herrick, Ben Mathias
Rx For Success At Back Bay National Wildlife Refuge: Take Two Committed Partners-Add Water, Janet Taylor, Julia Herrick, Ben Mathias
V. Poster Abstracts
As part of a major effort to improve habitats for waterfowl and other wetland-dependent wildlife, Ducks Unlimited, Inc. is contributing $187,500 in matching funds to help the U.S. Fish and Wildlife Service rehabilitate wetland impoundments at Back Bay NWR.
The three-year project will increase Refuge management capabilities on existing wetland areas, create 300 acres of new marsh habitat and increase water management flexibility throughout the impoundment system. Components of the project include:
- Raising and re-sloping 8 miles of existing dikes
- Installing 13 new water control structures
- Constructing 6,000 feet of new dikes
- Creating two storage pools totalling 53 acres and …
U.S. Fish And Wildlife Service Back Bay Initiative: Goals And Objectives, David A. Stilwell
U.S. Fish And Wildlife Service Back Bay Initiative: Goals And Objectives, David A. Stilwell
V. Poster Abstracts
Back Bay has historically been noted for its abundant wildlife and fisheries. A testimony to this fact has been the establishment of two U.S. Fish and Wildlife Service National Wildlife Refuges (Back Bay and Mackey Island National Wildlife Refuges), three Virginia Department of Game and Inland Fisheries Waterfowl Management Areas (Pocahontas, Barbours's Hill, and Trojan Waterfowl Management Areas) and a State park (False Cape State Park). Back Bay has been a major stopover point for waterfowl in the North Atlantic flyway, it had prodigious submerged aquatic vegetation (SAV) beds and an outstanding fisheries. Since the l 920's these resources have …
Environmental Education: A Chance For The Future, Ben Mathias
Environmental Education: A Chance For The Future, Ben Mathias
V. Poster Abstracts
The U.S. Fish and Wildlife Service is committed to providing environmental education opportunities for the Nation's student body. Local, regional and national educators are invited to investigate and utilize the resources of Back Bay National Wildlife Refuge with their colleagues and students. Teacher workshops at the Refuge provide orientation to Refuge lands, outdoor classroom sites, trails, interpretive facilities and equipment, and potential field activities. Refuge staff members are available to assist with: • Preliminary planning • Group scheduling • Library research • Workshop registration • Trip logistics and • On-site group orientation. Most classroom sites, associated trails/boardwalks, and Visitor Contact …
Synopsis Of The Notonectidae Of Arkansas, Stephen W. Chordas Iii, George L. Harp
Synopsis Of The Notonectidae Of Arkansas, Stephen W. Chordas Iii, George L. Harp
Journal of the Arkansas Academy of Science
No abstract provided.
"Introduction" (To Alfred Russel Wallace; An Anthology Of His Shorter Writings), Charles H. Smith
"Introduction" (To Alfred Russel Wallace; An Anthology Of His Shorter Writings), Charles H. Smith
DLPS Faculty Publications
No abstract provided.
Life History, Ecology, And Morphology Of The Ravine Salamander, Plethodon Richmondi, Ronnie D. Jewell
Life History, Ecology, And Morphology Of The Ravine Salamander, Plethodon Richmondi, Ronnie D. Jewell
Theses, Dissertations and Capstones
The distribution of P. richmondi and P. cinereus has been of interest to herpetologist for many years. Plethodon cinereus is found throughout the state except for part of the Allegheny Plateau Province where P. richmondi occurs. There is a somewhat abrupt end to their ranges where they overlap which does not appear to be influenced by elevational differences, vegetation patterns, or general climatic changes. The propose of this study was to determine if temperature and/or moisture are limiting the distribution of P. richmondi and P. cinereus in West Virginia. The natural history of P. richmondi has not in West Virginia …
The Species-Genus Relationship In Antillean Bat Communities, Donald A. Mcfarlane
The Species-Genus Relationship In Antillean Bat Communities, Donald A. Mcfarlane
WM Keck Science Faculty Papers
The ratio of the number of species to the number of genera in an island community has long been recognised as a potential proxy indicator of competitive interaction. An analysis of this relationship in the bat fauna of the Antillean archipelago demonstrates that the observed species-genus ratios are significantly depressed below null-model expectations, and that the magnitude of this depression is inversely proportional to the log of the appropriate island area. These observations are consistent with the hypothesis that interspecific competition may play an important role in structuring Antillean bat communities.
Specimen List, Lila Alejandra Sainz-Bacherer
Specimen List, Lila Alejandra Sainz-Bacherer
Division of Mammals - Field Notes and Catalogs
No abstract provided.
Assessment Of Organic And Metal Contaminants In Lower Back Bay And Upper Currituck Sound, Kate Benkert
Assessment Of Organic And Metal Contaminants In Lower Back Bay And Upper Currituck Sound, Kate Benkert
V. Poster Abstracts
Studies were conducted at Mackay Island National Wildlife Refuge in 1988 and 1989 to provide baseline data for an assessment of organic chemicals and metal contaminants in the aquatic ecosystem. Longnose gar, gizzard shad, snapping turtles, common rangia clams and sediments were collected from sites in lower Back Bay and upper Currituck Sound for contaminant analyses.
Composite sediment samples were analyzed for the presence of metals, organochlorine pesticides and polycyclic aromatic hydrocarbons (PAHs). Organochlorine pesticides were not detected in the sediments. Various PAH compounds were detected in the sediments, although at trace concentrations which just exceeded the analytical detection limit …
Refuge Land Acquisition: Helping Preserve Back Bay's Wildlife Heritage, Julia Herrick, Ben Mathias, Janet Taylor
Refuge Land Acquisition: Helping Preserve Back Bay's Wildlife Heritage, Julia Herrick, Ben Mathias, Janet Taylor
V. Poster Abstracts
The once-renowned waterfowl populations and bass fishery of Back Bay, Virginia have declined dramatically in recent years. Lands surrounding Back Bay are increasingly threatened by on-going and potential land development. These lands serve as an important filter for pollutant and sediment-laden runoff from adjacent areas. The boundary of the Back Bay National Wildlife Refuge was expanded in 1989 to include an additional 6,340 acres of brackish marsh, forested swamp, and "critical edge" upland habitat, important to a variety of wildlife species and for its natural filtering effect. Within the U.S. Fish and Wildlife Service's policy of working with willing sellers, …
Integrating Cognitive Ethology With Cognitive Psychology, Sonja I. Yoerg, Alan Kamil
Integrating Cognitive Ethology With Cognitive Psychology, Sonja I. Yoerg, Alan Kamil
Papers in Behavior in Biological Sciences
Cognitive ethology has been defined by Griffin (1978,1981, 1984) as the study of mental experiences in animals, restricting the domain of the field to phenomena thought to reveal intentionality, awareness, and conscious thinking. We argue that attempts to study these processes, while revealing impressive behavioral complexity, have proven unsuccessful in establishing the importance of mental experiences in determining animal behavior primarily because of the intractability of the problem. We suggest a different approach that draws upon the rich theory and sophisticated methodology of human and animal cognitive psychology while retaining an ecological and evolutionary perspective. Brief accounts of the conceptual …
Life History Studies, Host Records, And Morphological Description Of Genitalia Of Eurytoma Tylodermatis Ashm. (Hymenoptera : Eurytomidae) From South Dakota, Burruss Mcdaniel, Arvid A. Boe
Life History Studies, Host Records, And Morphological Description Of Genitalia Of Eurytoma Tylodermatis Ashm. (Hymenoptera : Eurytomidae) From South Dakota, Burruss Mcdaniel, Arvid A. Boe
Native Plant Focused Publications
Eurytoma tylodermatis Ashm. was found to be parasitic on Acanthoscelides perforatus (Horn) in seed pods of Canada milk- vetch {Astragalus canadensis L.). Observations on larval behavior and frequency of parasitism are discussed. Male and female genitalia of E. tylodermatis are illustrated.