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Articles 18541 - 18570 of 19670
Full-Text Articles in Entire DC Network
Notes On The Natural History Of Bats From Badlands National Monument, South Dakota, John P. Farney, J. Knox Jones Jr.
Notes On The Natural History Of Bats From Badlands National Monument, South Dakota, John P. Farney, J. Knox Jones Jr.
University of Nebraska State Museum: Mammalogy Papers
Little has been published on the mammalian fauna of Badlands National Monument, a unique ecological area that encompasses parts of Jackson and Pennington counties in South Dakota. By way of example, although five species of bats are herein recorded from the Monument, only one has been reported previously - see Jones and Choate (1978), who listed two specimens of Myotis thysanodes pahasapensis from the Cliff Shelf area. Jones and Genoways (1976b), however, did report several other species from badland areas not far distant from the boundary of the Monument.
In 1970, under sponsorship of the Badlands Natural History Association and …
Evaluation Of Impacts Associated With Reregulation Of Water Levels In Lake Mohave, Larry J. Paulson, John R. Baker, U.S. Water And Power Resources Service
Evaluation Of Impacts Associated With Reregulation Of Water Levels In Lake Mohave, Larry J. Paulson, John R. Baker, U.S. Water And Power Resources Service
Publications (WR)
The U.S. Water and Power Resources Service is considering reregulating Lake Mohave water levels to increase the net power benefit from Hoover Dam. Reregulation will not increase the generation capacity of the Hoover powerplant but it will enable the plant operation to be increased when the energy has greater monetary value. Energy generated at different times of the year has different market value, the highest being in January-March and July- September. By generating more power during these periods more net monetary benefit can be derived from Hoover Dam. The total volume of water released from Hoover Dam over an annual …
Environmental Factors Affecting The Diversity Of Reptiles In The Deep Canyon Transect Of The Colorado Desert, California, James W Cornett
Environmental Factors Affecting The Diversity Of Reptiles In The Deep Canyon Transect Of The Colorado Desert, California, James W Cornett
Theses Digitization Project
No abstract provided.
Bringing Nature Into The Zoo: Inexpensive Solutions For Zoo Environments, David Hancocks
Bringing Nature Into The Zoo: Inexpensive Solutions For Zoo Environments, David Hancocks
Zoos and Aquariums Collection
Animals in captivity have traditionally been kept in sterile and inappropriate environments. Typically this situation still prevails in zoos. Cages are designed only for restraint of the animals, expediency for the public, and convenient maintenance by keepers. The animals' behavioral needs are often ignored. By using nature as a norm, and by using natural materials, the spatial and temporal environment of a captive animal can be easily and greatly enriched. Several examples which have been used at Woodland Park Zoological Gardens are discussed. Their application and expansion are appropriate for most urban zoos.
Recent Mollusca Of Arkansas With Annotations To Systematics And Zoogeography, Mark E. Gordon
Recent Mollusca Of Arkansas With Annotations To Systematics And Zoogeography, Mark E. Gordon
Journal of the Arkansas Academy of Science
A total of 223 taxa of Mollusca are presently known from Arkansas. The geological history and geomorphology of the region, particularly the presence of the Interior Highlands, have been responsible for the development of a diverse molluscan fauna. Thirty regionally endemic forms are included among the 107 terrestrial gastropods, 36 aquatic gastropods, 65 unionacean mussels, and 15 sphaeriacean clams.
Population Regulation In Wolves, Jane M. Packard, L. David Mech
Population Regulation In Wolves, Jane M. Packard, L. David Mech
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
The possibility of social regulation of wolf populations has been discussed in the literature for several years. Some of the first ecological studies of wolves indicated that their populations did not increase as rapidly as was theoretically possible, and that they reached a saturation point apparently not set by food. Subsequent captive studies demonstrated the existence of social mechanisms possibly capable of regulating population growth. However, the importance of these factors in wild populations has not been established. This paper has four objectives: (1) to evaluate the existing concept of "intrinsic limitation," (2) to propose that wolf population dynamics may …
Botanical And Ecological Aspects Of Coastal Raised Peatlands In Maine : And Their Relevance To The Critical Areas Program Of The State Planning Office, Ian A. Worley
Maine Collection
Botanical and Ecological Aspects of Coastal Raised Peatlands in Maine : and Their Relevance to the Critical Areas Program of the State Planning Office.
by Ian A. Worley
A Report Prepared for the Maine Critical Areas Program, State Planning Office, 184 State Street, Augusta, Maine 04333.
Planning Report No. 69 (January 1980)
Contents: Foreword / Abstract / Table of Contents / List of Figures / List of Tables / Acknowledgements / Introduction / Natural History and Ecology of the Coastal Raised Peatlands / Selection of Coastal Peatlands Recommended for Evaluation by the Critical Areas Program / General Evaluation of Coastal …
Energy Values Of Nine Populus Clones, Terry F. Strong
Energy Values Of Nine Populus Clones, Terry F. Strong
Aspen Bibliography
Compares calorific values for components of nine Populus clones. The components include stem wood, stem bark, and branches. Also compares calorific values for clones of balsam poplar and black cottonwood parentages.
Edging Toward Extinction: The Status Of Wildlife In Latin America, Douglas R. Shane
Edging Toward Extinction: The Status Of Wildlife In Latin America, Douglas R. Shane
eBooks
No abstract provided.
A Limnological Study Of 43 Selected Maine Lakes, Derrill J. Cowing, Matthew Scott
A Limnological Study Of 43 Selected Maine Lakes, Derrill J. Cowing, Matthew Scott
Maine Collection
A Limnological Study of 43 Selected Maine Lakes
by Derrill J. Cowing and Matthew Scott
U.S. Geological Survey : Water-Resources Investigations 80-69
Prepared in cooperation with the Maine Department of Environmental Protection
U.S. Geological Survey, 26 Ganneston Drive, August, Maine 04330
Optimal Foraging In A Uniform Habitat: The Search Mechanism Of The Green Lacewing, Alan B. Bond
Optimal Foraging In A Uniform Habitat: The Search Mechanism Of The Green Lacewing, Alan B. Bond
Alan Bond Publications
The effects of food deprivation and prey contact on the components of searching behavior in larval green lacewings (Chrysopa carnea Stephens) were examined to test the applicability of optimal foraging theory to predation in a uniform habitat. Variation in foraging intensity was primarily the result of changes in the meander. Modulation of the response to prey contact with increasing deprivation involved changes in the velocity and the response persistence and suggested the occurrence of adaptation to inferred differences in the spatial distribution of the prey. The ratio of giving-up times at different levels of deprivation was in accordance with …
Northeastern Forest Experiment Station: Oak Site Index And Biomass Yield In Upland Oak And Cove Hardwood Timber Types In West Virginia, Harry V. Wiant, Michael S. Fountain
Northeastern Forest Experiment Station: Oak Site Index And Biomass Yield In Upland Oak And Cove Hardwood Timber Types In West Virginia, Harry V. Wiant, Michael S. Fountain
Aspen Bibliography
No abstract provided.
Ecology And Management Of Ruffed Grouse, Judith L. Landry
Ecology And Management Of Ruffed Grouse, Judith L. Landry
Aspen Bibliography
No abstract provided.
Continuation Of Spider Research In Arkansas: Gulf Coastal Plains, Peggy Rae Dorris
Continuation Of Spider Research In Arkansas: Gulf Coastal Plains, Peggy Rae Dorris
Journal of the Arkansas Academy of Science
No abstract provided.
Profile Of Human-Rabid Skunk Contacts In Arkansas: 1977-1979, Dale V. Ferguson, Gary A. Heidt
Profile Of Human-Rabid Skunk Contacts In Arkansas: 1977-1979, Dale V. Ferguson, Gary A. Heidt
Journal of the Arkansas Academy of Science
No abstract provided.
Observations On The Incidence Of Chiggers, Eutrombicula Alfreddugesi (Oudemans) On Crotaphytus (Sauria: Iguanidae) In Izard County, Arkansas, Chris T. Mcallister
Observations On The Incidence Of Chiggers, Eutrombicula Alfreddugesi (Oudemans) On Crotaphytus (Sauria: Iguanidae) In Izard County, Arkansas, Chris T. Mcallister
Journal of the Arkansas Academy of Science
No abstract provided.
Implications And Considerations Concerning The Status, Habitat And Distribution Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) (Pisces: Petromyzontidae) In Arkansas, Stephen A. Sewell, F. Allen Carter, Chris T. Mcallister
Implications And Considerations Concerning The Status, Habitat And Distribution Of The Least Brook Lamprey, Lampetra Aepyptera (Abbott) (Pisces: Petromyzontidae) In Arkansas, Stephen A. Sewell, F. Allen Carter, Chris T. Mcallister
Journal of the Arkansas Academy of Science
No abstract provided.
Water Striders (Hemiptera: Gerridae) Of Arkansas, Paul D. Kittle
Water Striders (Hemiptera: Gerridae) Of Arkansas, Paul D. Kittle
Journal of the Arkansas Academy of Science
The taxonomy, distribution, and ecology of the water striders of Arkansas are discussed based on personal collections, museum specimens, and literature records. A total of 15 species representing six genera is presently known from the state. One additional species is included as probably occurring in Arkansas.
Use Of An Outdoor Lab In Teaching Botany, Jewel E. Moore
Use Of An Outdoor Lab In Teaching Botany, Jewel E. Moore
Journal of the Arkansas Academy of Science
No abstract provided.
Repopulation Of Fishes In Riley Creek, Coles County, Illinois Following Nitrogen Fertilizer Pollution, Kim James Carney
Repopulation Of Fishes In Riley Creek, Coles County, Illinois Following Nitrogen Fertilizer Pollution, Kim James Carney
Masters Theses
The repopulation of stream fishes was studied from 17 May 1979 to 25 October 1979 following a major kill (100% mortality) caused by nitrogen fertilizer pollution in Riley Creek, Coles County, Illinois. The extent of recovery was determined by comparing post-kill collections with pre-kill survey data that was collected on 25 October 1978.
Repopulation began six days after the abatement of the pollution source. It is suggested that the initial source of repopulation was from the nearest undamaged tributary. The first three reinhabitants in order of appearence were: stonerollers (Campostoma anomalum); creek chubs (Semotilus atromaculatus); and …
Comparative Reproduction Of The Red-Eared Turtle, Pseudemys Scripta Elegans, In Heated And Natural Lakes, Gary Marshal Thornhill
Comparative Reproduction Of The Red-Eared Turtle, Pseudemys Scripta Elegans, In Heated And Natural Lakes, Gary Marshal Thornhill
Masters Theses
The effect of heating on aquatic ecosystems by energy producing power plants has not been fully determined. A comparative study of the reproduction of Pseudemys scripta was conducted in heated and natural lakes in southwestern Illinois from 30 March to 10 July, 1979. Lakes used were the same as those used for comparative growth studies of P. scripta by another researcher. Lake Baldwin (heated) has had a reduction in vegetation since that researcher's work. Temperatures were taken of air, water surface, and one meter deep.
Turtles were caught by hand, trammel nets, and in carp-baited hoop nets. Captured turtles were …
Propagation Of Quaking Aspen (Populus Tremuloides Michx.) From Root Cuttings, Karen Elizabeth Burr
Propagation Of Quaking Aspen (Populus Tremuloides Michx.) From Root Cuttings, Karen Elizabeth Burr
Aspen Bibliography
Lateral root cuttings were collected at five quaking aspen (Populus tremuloides Michx.) clones in Larimer County, Colorado on October 2, 1977 and May 30, 1978. The October 1977 root cuttings were stored eight months in air-tight plastic bags at 0 to 4°C. On June 1, 1978 the stored (October 1977) and the fresh (May 1978) root cuttings were planted in a greenhouse propagation bench. All sprouts that developed were allowed to grow on half of the 10-cm long root cuttings randomly selected as controls. On the remaining half of the root cuttings, designated pruned, all but the tallest sprout were …
Nebraska Trapping, George Schildman, Frank Andelt, Jim Brunner
Nebraska Trapping, George Schildman, Frank Andelt, Jim Brunner
Nebraska Game and Parks Commission: Publications
Fur bearers and trapping played an important role in the exploration and development of Nebraska. The harvest of our fur-bearer resource is part of every Nebraskan's heritage. Wise use of the resource and consideration for other people's property and personal rights can insure that trapping will remain a part of the heritage of future generations. The purpose of this publication is to help insure this heritage ... through the educational process. Knowledge of and respect for the resource, as well as consideration for other people, are the keys to perpetuating trapping as an outdoor activity. While primarily designed to assist …
Investigation Of The Streambed Oxygen Demand Of Fourche Creek, Pulaski County, Arkansas, John D. Rickett, Patrick Edelmann
Investigation Of The Streambed Oxygen Demand Of Fourche Creek, Pulaski County, Arkansas, John D. Rickett, Patrick Edelmann
Journal of the Arkansas Academy of Science
No abstract provided.
Food Of Bluegill And Longear Sunfish In Degray Reservoir, Arkansas, 1976, Horace E. Bryant, Thomas E. Moen
Food Of Bluegill And Longear Sunfish In Degray Reservoir, Arkansas, 1976, Horace E. Bryant, Thomas E. Moen
Journal of the Arkansas Academy of Science
Stomach contents were examined from 544 bluegill (Lepomis macrochirus) and 709 longear sunfish (L. megalotis) collected from nearshore areas of DeGray Reservoir April-November 1976. Major foods of bluegill (percentage of total weight of food in parentheses) were insects (33), bryozoa (7.3), planktonic crustaceans (6.5), and plant materials (15.4). The major food items contributing to the diet of longear sunfish were insects (52.6%), crayfish (12.5%), fish (7.4%), and plant material (6.7%). Although bluegill and longear sunfish are closely related species, their diets were not as similar as expected: bluegill consumed zooplankton, adult dipterans, and adult ephemeropterans associated with limnetic areas; while …
Food Of Largemouth Bass (Micropterus Salmoides) In Degray Reservoir, Arkansas, 1976, Horace E. Bryant, Thomas E. Moen
Food Of Largemouth Bass (Micropterus Salmoides) In Degray Reservoir, Arkansas, 1976, Horace E. Bryant, Thomas E. Moen
Journal of the Arkansas Academy of Science
Stomach contents were examined from 748 largemouth bass, Micropterus salmoides (<125 mm total length), collected from DeGray Reservoir during April-November 1976. Fish constituted 59% by weight of the total diet and occurred in 81% of the stomachs; crayfish made up nearly 38% of the weight and occurred in 24% of the stomachs. Sunfish, the principal fish food (about 28% by weight), were observed in 36% of the stomachs. Shad were the second most important prey (23% by weight and 29% frequency in occurrence). Crayfish constituted about 42% of the total weight of the food of bass 200 mm long or longer, but only 12% in bass less than 200 mm. Crayfish consumption was greatest during the fall.
Inventory Of The Decapod Crustaceans (Crayfishes And Shrimps) Of Arkansas With A Discussion Of Their Habitats, Raymond W. Bouchard, Henry W. Robison
Inventory Of The Decapod Crustaceans (Crayfishes And Shrimps) Of Arkansas With A Discussion Of Their Habitats, Raymond W. Bouchard, Henry W. Robison
Journal of the Arkansas Academy of Science
The freshwater decapod crustaceans of Arkansas presently consist of two species of shrimps and 51 taxa of crayfishes divided into 47 species and four subspecies. The shrimps are represented by Macrobranchium ohione and Palaemonetes kadiakensis. The crayfish fauna is the largest of any state west of the Mississippi River reflecting the variety of habitats within Arkansas as a result of the geologic diversity in the state. The Ozark Plateaus and Ouachita provinces are dominated by the genus Orconectes, while in the Gulf Coastal Plain Procambarus is the most conspicuous group. Other crayfish stocks present include Cambarus, found predominantly in the …
Fishes Of Rock Creek, Sharp County, Arkansas, F. Allen Carter, John K. Beadles
Fishes Of Rock Creek, Sharp County, Arkansas, F. Allen Carter, John K. Beadles
Journal of the Arkansas Academy of Science
A survey of the fishes of Rock Creek in north central Arkansas was made on 9-10 November, 1978, and 15-16 March, 1979. Field collections were made using a minnow seine and backpack shocker. The creek system was inhabited by 28 species of fish representing eight families. Fish collections were typical of a small Ozark stream. The most abundant species were: Campostoma oligolepis Hubbs and Greene, largescale stoneroller; Notropis telescopus (Cope), telescope shiner; Notropis zonatus (Putnam), bleeding shiner; Moxostoma duquesnei (Lesueur), black redhorse; Etheostoma blennioides Rafinesque, greenside darter; Etheostoma caeruleum Storer, rainbow darter; Etheostoma euzonum (Hubbs and Black), Arkansas saddled darter; …
Estimated Growth And Standing Crop Of Largemouth Bass (Micropterus Salmoides) From Lake Elmdale, Alex Zdinak Jr., Raj V. Kilambi, Marvin L. Galloway, John E. Mcclanahan, Clark Duffe
Estimated Growth And Standing Crop Of Largemouth Bass (Micropterus Salmoides) From Lake Elmdale, Alex Zdinak Jr., Raj V. Kilambi, Marvin L. Galloway, John E. Mcclanahan, Clark Duffe
Journal of the Arkansas Academy of Science
Electro-fishing gear was used to make shoreline population estimates of largemouth bass (Micropterus salmoldes) in Lake Elmdale, Washington County, Arkansas, during September 1979. The population density was estimated to be 1541 bass/Km² with a standing crop of 30.4 kg/ha. The length-weight relationship was calculated as W = 0.00001 504L^2.97, and the total length-scale radius relationship as L = 41.75 + 1.23 St. The average condition coefficient(K) was 1.31. In comparison with four other Arkansas lakes the population density of largemouth bass was highest in Lake Elmdale while the growth rate was lowest.
Systematic Status Of The Fishes Of Genus Campostoma (Cyprinidae) Inhabiting The Major Drainages Of Northern Arkansas, Stephen A. Sewell, John K. Beadles, V. Rick Mcdaniel
Systematic Status Of The Fishes Of Genus Campostoma (Cyprinidae) Inhabiting The Major Drainages Of Northern Arkansas, Stephen A. Sewell, John K. Beadles, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
A total of 6980 morphometric and meristic data points were analyzed from specimens previously identified as Campostoma anomalum pullum and Compostoma oligolepis from all areas of their Ozark ranges in Arkansas. Data were analyzed using the Statistical Analysis System (SAS) and IBM 370 Computer System (HASP II). An attempt was made to establish separation points through multivariate analysis (MANOVA) by taxon and watershed. Additional analyses included factor analysis and discriminant function analysis. Scale count frequencies were analyzed using computer program MINITAB. MANOVA revealed a lack of consistent separation points, and Ozark populations were shown to be distinct and highly variable …