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Articles 50641 - 50670 of 52421
Full-Text Articles in Entire DC Network
Aculeate Hymenoptera (Vespidae And Sphecidae) Of Curlew Valley, George E. Bohart, George F. Knowlton, Wilford J. Hanson
Aculeate Hymenoptera (Vespidae And Sphecidae) Of Curlew Valley, George E. Bohart, George F. Knowlton, Wilford J. Hanson
Progress reports
No abstract provided.
Executive Meeting Minutes, Us/Ibp Desert Biome
Measurement Of Evapotranspiration With A Monolith Lysimeter, D. W. Young, D. D. Evans, T. W. Sammis
Measurement Of Evapotranspiration With A Monolith Lysimeter, D. W. Young, D. D. Evans, T. W. Sammis
Progress reports
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, R. Mankau, S. A. Sher
Biology Of Nematodes In Desert Ecosystems, D. W. Freckman, R. Mankau, S. A. Sher
Progress reports
No abstract provided.
Blood And Tissue Identification Of Selected Birds And Mammals, Part 4, David W. Oates, Craig W. Brown, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part 4, David W. Oates, Craig W. Brown, Debra L. Weigel
Other Publications in Wildlife Management
Part 4 (pages 73-92 of original)
Protein Patterns for Mammals (Figure 15), continued:
Domestic Sheep
Striped Skunk
Protein Patterns for Birds (Figure 16)
Chicken
Mallard Duck
Golden Eagle
Snow Goose
Screech Owl
Ring-necked Pheasant
Pigeon
Turkey
Blood And Tissue Identification Of Selected Birds And Mammals, Part 3, David W. Oates, Craig W. Brown, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part 3, David W. Oates, Craig W. Brown, Debra L. Weigel
Other Publications in Wildlife Management
Part 3 (pp. 51-72 of original)
Protein Patterns for Mammals (Figure 15), continued:
Dog
El k
Red Fox
Human
Mink
Opossum
Pig
Porcupine
Prairie Dog
Raccoon
Bighorn Sheep
Self-Sustaining Rainbow Trout (Salmo Gairdneri) Population In Mcconaughy Reservoir, Nebraska, Rodney C. Van Velson
Self-Sustaining Rainbow Trout (Salmo Gairdneri) Population In Mcconaughy Reservoir, Nebraska, Rodney C. Van Velson
Nebraska Game and Parks Commission: Staff Research Publications
A self-sustaining rainbow trout population has developed in the North Platte River drainage. This population inhabits McConaughy Reservoir and reproduces successfully in tributary streams of the North Platte River located approximately 11.3 to 145 km above the reservoir. Fall and spring spawning populations migrate from the reservoir.
Scale analysis indicated 92% of the juveniles had spent 1 yr and 8% had spent 2 yr in the stream before the spring migration to the reservoir as 175-250 mm smolts. In the 1965-1969 spawning populations 1.3 life history categories were present. The spawning runs were composed of 76% maiden spawners, 22% second-year …
Open-Land Policy In Connecticut, Roger L. Sherman, Neil C. Shropshire, Paul S. Wilson, Albert C. Worrell
Open-Land Policy In Connecticut, Roger L. Sherman, Neil C. Shropshire, Paul S. Wilson, Albert C. Worrell
Yale School of the Environment Bulletin Series
No abstract provided.
The Environment For Women Working On Environmental Problems, Jeanne Clare Ridley, Adele H. Goss, Jeanna Randall, Jane Westenberger
The Environment For Women Working On Environmental Problems, Jeanne Clare Ridley, Adele H. Goss, Jeanna Randall, Jane Westenberger
Yale School of the Environment Bulletin Series
No abstract provided.
Blood And Tissue Identification Of Selected Birds And Mammals, Part 5, David W. Oates, Craig W. Brown, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part 5, David W. Oates, Craig W. Brown, Debra L. Weigel
Other Publications in Wildlife Management
Part 5—Appendix (pages A1–A13)
ELECTROPHORESIS TECHNIQUES
U.S. SURVEY RESULTS--The discussion, advantages, and disadvantages are the views of the province or state under which they appear. Information was obtained from questionnaires sent to the individual states on August 3, 1973. The following is a summary of the responses to this questionnaire and does not take into consideration any progress achieved since then.
Canadian Survey Results-- The following information concerning the Canadian provinces was supplied by Stan Webb o f Alberta for the Alberta Fish and Wildlife Division, Department of Lands and Forests in Edmonton. Mr. Webb prepared a survey in the …
Water Economy For Lawns And Gardens, K S. Cole
Water Economy For Lawns And Gardens, K S. Cole
Journal of the Department of Agriculture, Western Australia, Series 4
Much of the summer water consumption occurs because it is widely believed that heavy summer watering is necessary. Householders often mistakenly water heavily to keep their gardens green and growing. Many may not realise that gardens can be kept vigorous and healthy with much less water than is commonly applied.
Blood And Tissue Identification Of Selected Birds And Mammals, Part 1, David W. Oates, Craig W. Brown, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part 1, David W. Oates, Craig W. Brown, Debra L. Weigel
Other Publications in Wildlife Management
Identification of blood and tissue samples for law enforcement purposes was initiated in 1968 by Carl Wolfe, Senior Biologist, Research Division, Nebraska Game and Parks Commission. At that time and up to the present, a great deal of assistance, time and advice has been received from Carl R. Jolliff, Director of the Clinical Laboratory of Lincoln; Dr. Connell L. Marsh, Professor of Biochemistry, University of Nebraska, and Dr. Leonard W. Staudinger, Chairman of Biology Department, Nebraska Wesleyan University. Grateful appreciation is extended to Dr. Stan Cassel DVM and all Game Commission personnel of Nebraska and South Dakota who aided in …
Blood And Tissue Identification Of Selected Birds And Mammals, Part 2, David W. Oates, Craig W. Brown, Debra L. Weigel
Blood And Tissue Identification Of Selected Birds And Mammals, Part 2, David W. Oates, Craig W. Brown, Debra L. Weigel
Other Publications in Wildlife Management
Part 2 (pages 30-50 of original)
Protein Patterns for Mammals (Figure 15):
Antelope
Badger
Beaver
Bobcat
Buffalo
Cat
Cow
Coyote
White-tailed Deer
Grain Moisture And The Weather : What Can The Records Tell Us?, M W. Perry, P. A. Fievez
Grain Moisture And The Weather : What Can The Records Tell Us?, M W. Perry, P. A. Fievez
Journal of the Department of Agriculture, Western Australia, Series 4
The expansion of cereal production in areas along the south coast has exposed harvesting problems associated with high grain moisture.
A grain delivery standard of 12 per cent moisture means that, in the absence of grain drying facilities, harvesting times in the field are restricted to those hours when grain moisture falls below this figure.
Grain moisture, however, remains the major problem and for planning purposes, producers require an estimate of the harvesting time available in a given year. This will depend on all the climatic variables which affect grain moisture. These include rainfall and dew which deposit water directly …
Conservation Of The National Estate, Department Of Agriculture, Western Australia
Conservation Of The National Estate, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
In 1973 the Australian Government established a Committee of Inquiry under Mr. Justice R. M. Hope to inquire into the National Estate. Under its terms of reference the Committee was to assess the nature and condition of the National Estate and the measures which were being and should be taken for its preservation and enhancement.
Officers of the Department of Agriculture recognise that there are basic natural resources such as land, water, gene material and ecosystems which are essential elements of the National Estate held in trust by successive generations.
In a submission to the Inquiry, matters of particular concern …
Nitrogen Fertilisers For Pasture Production, Walter Jacob Cox, K Hawley
Nitrogen Fertilisers For Pasture Production, Walter Jacob Cox, K Hawley
Journal of the Department of Agriculture, Western Australia, Series 4
At current prices nitrogen fertiliser is not an economic substitute for good clover pastures, but it can supplement the system by increasing nitrogen supply at peak growth periods. It can also provide useful increases in pasture production at critical feed times. Nitrogen usage for pasture production is still in the experimental stages and small areas should be tried before large-scale application.
Pheasant Reproduction And Survival As Related To Agricultural Fertilizer Use, Lawrence Francis Fredrickson
Pheasant Reproduction And Survival As Related To Agricultural Fertilizer Use, Lawrence Francis Fredrickson
Electronic Theses and Dissertations
Wing-clipped wild pheasants (Phasianus colchicus) were stocked in 1-acre and 0.5-acre pens having oat and bromegrass cover in 1972 and 1973 to test effects of fertilizer (Formulations: 34-0-0, 18-46-0, 0-46- 0, and 0-0-60) on pheasant reproduction and survival. One-half of the pens were fertilized with the recommended rate of pelleted fertilizer and the other half without fertilizer. Complete nest searches in July showed that nesting success was not significantly different (P>0.05) between treatments for both years. No significant difference (P>0.05) was found in clutch size or in number of ovulated follicles from control and experimental hens. Significantly more …
Feeding Of Hatchery-Reared Brown Trout (Salmo Trutta L.) In Relation To The Diet In A South Dakota Stream, Richard W. Mccoy
Feeding Of Hatchery-Reared Brown Trout (Salmo Trutta L.) In Relation To The Diet In A South Dakota Stream, Richard W. Mccoy
Electronic Theses and Dissertations
One thousand five hundred catchable brown trout (17-26 cm) were stocked into the South Fork of the Yellowbank River May 17, 1973. Samples were taken one month apart from May 22, 1973, through October 29, 1973. Fifteen-minute drift samples were collected every hour for 24 hours and trout were captured every 4 hours. Trout captured ruing the study varied in condition ® from 1.34 to 2.55. Condition progressively decreased through August, rose in September, and decreased again by the October sample. The average weight of brown trout increased through the September sample and decreased in October. Two peaks in number …
Studies Of The White Pelican In South Dakota: Reproductive Biology Of Wild Populations And Effects Of Polychlorinated Biphenyls And Ddt On The Behavior Of Penned Birds, Vernon Pat Mccrow
Studies Of The White Pelican In South Dakota: Reproductive Biology Of Wild Populations And Effects Of Polychlorinated Biphenyls And Ddt On The Behavior Of Penned Birds, Vernon Pat Mccrow
Electronic Theses and Dissertations
The learning behavior of penned white pelicans (Pelecanus erythrorhynchos) was studies 2 August to 5 October 1972 using a swimming pool – Y-maze apparatus in an operant conditioning experiment. The experiment consisted of three consecutive phases: trial-and-error learning, extinction, and relearning. Three groups of nine pelicans each were studied: a polychlorinated biphenyl (PCE) treated group, a DDT, DDD, DDE treated group, and a Control group. The object of this study was to determine the effect of PCB and DDT, DDD, DDE on the learning ability of penned white pelicans. Control, PCB, and DDT groups of penned white pelicans learned to …
Habitat Preferences And Food Habits Of Striped Skunks In Eastern South Dakota, Melvin S. Moe
Habitat Preferences And Food Habits Of Striped Skunks In Eastern South Dakota, Melvin S. Moe
Electronic Theses and Dissertations
Habitat preferences of striped skunks (Mephitis mephitis) in Brookings County, South Dakota, were determined rom the relationship of nighttime roadside indices to 25 habitat variables of 277, 1-square mile plots. Winter tracking was also conducted. Skunks were collected on the study area in 1972-1972, and contents of 59 stomachs and 63 colons were studied to determine food habits. Indices of prey abundance in different habitat types were obtained from snap-trap surveys. The 25 variables accounted for 14.9 percent of the variation in skunk numbers. The relationships of three of these variables to skunk numbers were significant (P<0.05). The significant variables and the variation accounted for by each were: (a) number of areas of idle grassland, 6.3 percent; (b) number of rockplies, 1.5 percent; and (c) acreage of idle grassland, 1.3 percent. Idle grasslands were the main activity centers of skunks tracked during the winter. Food habits were analyzed for the periods March-April, May-June, July-August, and September-November. Insects were the most frequently found food item in al time periods except March-April, during which mammals occurred more frequently. Mammals made up the largest volume of food in March-April and May-June. Amphibians made up the greatest volume in July-August, while amphibians, mammals, and insects were found in nearly equal volumes in September-November. Bird remains occurred during all time periods. Eggs were found in May-June and July-August. Meadow voles (Microtus spp.), the most frequent mammalian food item during all time periods, were common only in habitat types having heavy residual cover. Idle grassland is an important nestling cover for gamebirds and waterfowl. Since the number of areas of this cover type apparently has a stronger relationship with skunk numbers than its total acreage, grassland nesting cover might best be managed in large, homogeneous blocks. Areas managed in this way would probably support lower skunk densities than more diverse areas containing equal acreages of idle grassland, thus reducing nest predation by skunks. Skunk control programs should be most efficient when centered around idle grassland and rockplies.
Influence Of Vegetation On The Distribution Of Small Mammals On A Waterfowl Production Area, Douglas A. Searls
Influence Of Vegetation On The Distribution Of Small Mammals On A Waterfowl Production Area, Douglas A. Searls
Electronic Theses and Dissertations
. A study was conducted on a Waterfowl Production Area in Brookings County, South Dakota in 1972-73 to determine the distribution and abundance of small mammals. Three cover types, reseeded native grassed, brome-alfalfa, and bluegrass, were studied. Meadow voles (Microtus pennsylvanious), and deer mice (Peronyscus maniculatus) were captured most frequently. Jumping ice (Zapus hudsonius), masked shrews (Sorex cinerius), short tailed shrews (Blarins brevicauda), grasshopper mice (Omychomys leucogaster) and house mice (Mis musculus) were also taken. The bluegrass association had the highest number of small mammal captures and the reseeded native grass association has the least. There was no significant difference …
Changes In The Economy And Ecology At Proposed Lake Sites In The Salt River Basin, Kentucky, During Early Construction Of The Dam For Taylorsville Lake, Louis A. Krumholz, Stuart E. Neff, Edmond J. Bacon Jr., John R. Baker, Daryl E. Jennings, Andrew C. Miller, Vincent H. Resh, David S. White
Changes In The Economy And Ecology At Proposed Lake Sites In The Salt River Basin, Kentucky, During Early Construction Of The Dam For Taylorsville Lake, Louis A. Krumholz, Stuart E. Neff, Edmond J. Bacon Jr., John R. Baker, Daryl E. Jennings, Andrew C. Miller, Vincent H. Resh, David S. White
KWRRI Research Reports
This is an extension of the work reported in Project numbers B-005-KY, B-016-KY, and B-022-KY that extended from 1 July 1968 through 30 June 1972. Permanent collecting stations have been established at 67 sites throughout the Salt River, Beech Fork, and Chaplin River drainages. Turbidities increases quickly as flow and runoff increase, and subside quickly when the rain stops. Suspended solids range up to 1,700 mg/l in high turbidities and vary considerably as a result of local spates. Water chemistry generally reflects the limestone nature of the substrate and physico-chemical characteristics of a typically healthy limestone stream. Bottom organisms are …
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality, Phase I, Wesley J. Birge, John J. Just, Albert G. Westerman, A. Duane Rose
Sensitivity Of Vertebrate Embryos To Heavy Metals As A Criterion Of Water Quality, Phase I, Wesley J. Birge, John J. Just, Albert G. Westerman, A. Duane Rose
KWRRI Research Reports
Avian, amphibian and fish embryos were given continuous treatment with inorganic mercury, methyl mercury, cadmium and lead, to determine the sensitivity of embryogenesis to metallic poisoning. All metals produced substantial degrees of lethality and/or gross anatomical anomalies at 10 ppb or less. Treatment with inorganic mercury at 10 ppb produced 100% kill of frog embryos. Chick and rainbow trout embryos suffered 10-20% lethality when exposed to 1 ppb of either inorganic or methyl mercury. Lead and cadmium at 1 ppb produced 24-32% lethality in chick embryos. No significant differences were observed in the embryopathic effects of inorganic or methyl mercury. …
Rate Of Growth As A Method Of Assessing Water Quality, George L. Johnston
Rate Of Growth As A Method Of Assessing Water Quality, George L. Johnston
Masters Theses
A study of the Embarras River basin was conducted to determine if rate of growth could be used as an indicator of water quality. Six species of sucker were collected from five locations using hand seines and electrofishing gear from December 1970 to December 1971. Tests of eighteen water quality parameters were conducted from November 1970 to November 1971.
The fish were measured and scale samples taken. The rate of growth of the fish taken at the five stations was analyzed and compared using the single classification analysis of variance. Condition factors were also compared.
Although there was some difference …
Evaluation Of Duck Production On Waterfowl Production Areas In Northeast North Dakota, Gerald L. Heismeyer
Evaluation Of Duck Production On Waterfowl Production Areas In Northeast North Dakota, Gerald L. Heismeyer
Electronic Theses and Dissertations
An investigation of duck production on six Waterfowl Production Areas (WPA’s) in northeastern North Dakota was conducted during 1970-73. This investigation was conducted in conjunction with habitat-manipulation study by the Northern Prairie Wildlife Research Center that entailed prescribed burning of three WPA’s. Wetland habitat conditions, breeding populations and nesting were evaluated all four years. Brood observations were made during the last three years and nesting cover was evaluated during the last two years of investigation. Wetland habitat conditions were generally favorable during the first three years of investigation but in 1973 wetland conditions were extremely poor due to low precipitation …
Effects Of Temperature On The Toxicity Of Oil Refinery Waste, Sodium Chlorate, And Treated Sewage To Fathead Minnows, Curt C. Shifrer, E. Joe Middlebrooks, Donald B. Porcella, William F. Sigler
Effects Of Temperature On The Toxicity Of Oil Refinery Waste, Sodium Chlorate, And Treated Sewage To Fathead Minnows, Curt C. Shifrer, E. Joe Middlebrooks, Donald B. Porcella, William F. Sigler
Reports
A literature review and experiments were conducted to determine the effects of temperature on the toxicity of three materials to fish (fathead minnows,
Hydrologic Model Studies Of The Mt. Olympus Cove Area Of Salt Lake County, J. Paul Riley, Vernon J. Rogers, George B. Shih
Hydrologic Model Studies Of The Mt. Olympus Cove Area Of Salt Lake County, J. Paul Riley, Vernon J. Rogers, George B. Shih
Reports
Urban development on any natural drainage basin causes marked changes in the runoff characteristics of the basin. Urbanization alters natural drainage channels and reduces average infiltration rates. Thus, flood conditions are enhanced both within the urbanizing area itself and at downstream locations, where existing channels might not be able to cope with the increased rates of water flow. The Olympus Cove area in Salt Lake County is undergoing rapid urban development, and potential flood hazards within the area and at downstream locations are thereby increasing. Recognizing this situation, officials of the Sale Lake County took the initiative in organizing an …
A Continuous Flow Kinetic Model To Predict The Effects Of Temperature On The Toxicity Of Waste To Algae, James H. Reynolds, Joe E. Middlebrooks, Donald B. Porcella, William J. Grenney
A Continuous Flow Kinetic Model To Predict The Effects Of Temperature On The Toxicity Of Waste To Algae, James H. Reynolds, Joe E. Middlebrooks, Donald B. Porcella, William J. Grenney
Reports
A continuous flow kinetic model to describe and predict the effects of temperature on the toxicity of a specific oil refinery waste to the green alga,
Water Resources Planning, Social Goals, And Indicators: Methodological Development And Empirical Test, Henry P. Caulfield
Water Resources Planning, Social Goals, And Indicators: Methodological Development And Empirical Test, Henry P. Caulfield
Reports
A methodology for comprehensive evaluation of water resources development and use (Techcom) has been developed and partially field tested. A model of societal goals consists of nine primary goals successively articualted into increasingly specific subgoals. Achievement of subgoals is perceived as affected by measurable social indicators whose values are perturbed by water resources actions. Linking the elements of the goals taxon by connectives result in an evaluation system. historical, political and philosophical considerations of the proposed system are discussed in Part I. Part II describes the results of the Rio Grande of New Mexico test including public perception and weighting …
An Analysis Of Water Research Programs Of The Utah Water Research Laboratory And Center For Water Resources Research, Water Resources Research Citizen Advisory Panel
An Analysis Of Water Research Programs Of The Utah Water Research Laboratory And Center For Water Resources Research, Water Resources Research Citizen Advisory Panel
Reports
Foreward: As a means of keeping water research programs at Utah State University responsive to needs in terms of both timeliness and emphasis, President Glen L. Taggart, in 1970, requested a number of Utah citizens to serve as a panel to give counsel and advice to the Utah Water Research Laboratory and Center for Water Resources Research. Membership of this 16-member panel represents a broad spectrum of water-related experience gained from a variety of professional backgrounds and organizational affiliations. The objective was to keep the panel small enough for it to be a "working" group but large enough to obtain …