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Articles 1291 - 1320 of 1421
Full-Text Articles in Entire DC Network
Notes On The Biology Of Halictus (Halictus) Farinosus Smith (Hymenoptera: Halictidae), William P. Nye
Notes On The Biology Of Halictus (Halictus) Farinosus Smith (Hymenoptera: Halictidae), William P. Nye
All PIRU Publications
Describes the habitat, life history, foraging, social behavior, and nest architecture of the subsocial halictine bee Hal ictus (Hal ictus) farinosus Smith. The interplay of host-plant conditions with nest development and generations is discussed. Natural enemies and other associates are noted but not extensively treated.
Biological Studies On Some Ghanats Of Iran, Fardin Oliaei
Biological Studies On Some Ghanats Of Iran, Fardin Oliaei
Masters Theses
The present study was undertaken to monitor the quality of drinking water in the ghanats of Tehran during 1978-1979. Four sites were chosen, and various limnological parameters were investigated.
Physical-chemical analyses were evaluated to determine the composition of the water. There was no significant pollution related to chemical-physical parameters.
Planktonic samples were analyzed with the aid of a Sedgewich-Rafter counting cell. A total of 47 genera were found in all four ghanats.
The planktonic population declined dramatically in winter. Mean diversity and equitability of the algae showed no significant level of pollution and degradation in the study areas.
Bacterial content …
Animals In Education: The Use Of Animals In High School Biology Classes And Science Fairs, Heather Mcgiffin, Nancie Brownley
Animals In Education: The Use Of Animals In High School Biology Classes And Science Fairs, Heather Mcgiffin, Nancie Brownley
ANIMALS IN EDUCATION is the proceedings of the conference, "The Use of Animals in High School Biology Classes and Science Fairs," held September 27-28, 1979 in Washington, D.C. which was sponsored by The Institute for the Study of Animal Problems, 2100 L Street, N.W., Washington, D.C. in connection with The Myrin Institute for Adult Education, 521 Park Avenue, New York, N.Y. 10021.
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
Occurrence And Seasonality Of Perkinsus Marinus (Protozoa: Apicomplexa) In Mississippi Oysters, John Ogle, Katherine Flurry
Occurrence And Seasonality Of Perkinsus Marinus (Protozoa: Apicomplexa) In Mississippi Oysters, John Ogle, Katherine Flurry
Gulf and Caribbean Research
Oysters from four reefs in Mississippi Sound, sampled over a period of 25 months, were found to have a low prevalence of the protozoan parasite Perkinsus marinus. The greatest values were 80% prevalence, and 0.88 weighted incidence recorded for oysters from Biloxi Bay, Mississippi.
A Partial Bibliography Of Cyprinodon Variegatus (Osteichthyes: Cyprinodontidae), David A. Bengtson
A Partial Bibliography Of Cyprinodon Variegatus (Osteichthyes: Cyprinodontidae), David A. Bengtson
Gulf and Caribbean Research
A partial bibliography of the sheepshead minnow Cyprinodon variegatus Lacépède, 1803, is presented. Scientific works related to systematics and general biology are listed along with references to recent work involving toxicological bioassays. An extensive search of the literature on parasites of C. variegatus was not conducted.
Effect Of Cold Shock On The Metabolism Of Trichomonas Gallinae, James J. Daly
Effect Of Cold Shock On The Metabolism Of Trichomonas Gallinae, James J. Daly
Journal of the Arkansas Academy of Science
The influence of cold (4°C) used to prepare cells for metabolic investigations was examined with Trichomonas gallinae in this study. Cells washed with cold diluent in a refrigerated centrifuge were found to be less stimulated in their gas production at 37°C when exposed to glucose or maltose than cells washed at room temperature conditions. Such cold-prepared cells had higher initial glycogen contents after washing, faster endogenous glycogen degradation rates when incubated at 37 °C, but lower glycogen synthesis in the presence of glucose or maltose when compared to cells not prepared in the cold. However, uptake of glucose and maltose …
Aspects Of Larval Ecology Of Squilla Empusa (Crustacea, Stomatopoda) In Chesapeake Bay, Steven G. Morgan
Aspects Of Larval Ecology Of Squilla Empusa (Crustacea, Stomatopoda) In Chesapeake Bay, Steven G. Morgan
OES Faculty Publications
Larvae of Squilla empusa were collected from the plankton and were laboratory-reared in 16 combinations of temperature and salinity to determine their tolerances. Larvae survived longer and molted more frequently when reared at 25%, and 20° or 25° C, which corresponds to the natural conditions of Chesapeake Bay when the larvae were collected.
A 2 year planktonic survey conducted in the lower region of the bay by the Virginia Institute of Marine Sciences was compared with a survey made at the bay mouth in 1976. The seasonal occurrence of Squilla empusa larvae extended from the last week of July until …
Larval Biology Of Some Utah Chrysididae, Bakary Vassery Ouayogode
Larval Biology Of Some Utah Chrysididae, Bakary Vassery Ouayogode
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Biologies of eight chrysidid species were described. These wasps parasitized bees and wasps collected in trap nests set at several sites in two canyons near Logan, Utah. The completed nests were taken to the laboratory and the parasitized ones were kept for study of the development a l biology and behavior of both host and parasites.
The larval stages of Chrysura smaragdicolor, Chrysura sonorensis, Chrysis parkeri, Chrysis derivata, Chrysis coerulans, Cerotachrysis enhuycki, Trichrysis doriae and Hedychridium solierellae were studied. Omalus iridescens and Omalus purpuratus larvae were observed only in the fifth instar. The major …
Fisheries Report No 38 - The Shark Bay Prawn Fishery (1970 - 1976), J. W. Penn, R. W. Stalker
Fisheries Report No 38 - The Shark Bay Prawn Fishery (1970 - 1976), J. W. Penn, R. W. Stalker
Fisheries Research Reports
The existence of prawn stocks in Shark Bay, Western Australia, has been known since 1904 when the sailing ketch "Rip" on charter to the Western Australian Government, trawled large quantities of prawns from the area between Bernier Island and the mainland, Gale (1905). Although the Fisheries research vessel "Lancelin" trawled potentially commercial quantities of prawns from Shark Bay in the early 1950's, it was not until 1962 that a regular fishery was begun.
Today the prawn stocks of Shark Bay support Western Australia's largest and most consistent prawn fishery, having an annual production currently exceeding 2 000 tonnes. The catch …
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Memorandum
No abstract provided.
Photoelectric Properties And Detection Of The Aromatic Carcinogens Benzo[A]Pyrene And Dimethylbenzanthracene, William A. Houle, Hugh M. Brown, O. Hayes Griffith
Photoelectric Properties And Detection Of The Aromatic Carcinogens Benzo[A]Pyrene And Dimethylbenzanthracene, William A. Houle, Hugh M. Brown, O. Hayes Griffith
Department of Biochemistry: Faculty Publications
The absolute photoelectron quantum yield spectra for benzo[ajpyrene and dimethylbenzanthracene are presented in the wavelength range 180-230 nm. These polycyclic aromatic carcinogens have photoelectron quantum yields of approximately 2 X 10-3 electrons per incident photon at 180 nm. The quantum yields fall off quickly and monotonically at wavelengths longer than 210 nm (5.9 eV). Threshold values for benzo[a]pyrene and dimethylbenzanthracene are 5.25 ± 0.06 eV and 5.27 ± 0.04 eV, respectively. The photoelectron quantum yields of benzo[a]pyrene and dimethylben-zanthracene are several orders of magnitude greater than typical components of biological membranes (amino acids, phospholipids, and polysaccharides). Preliminary micrographs of …
Tritium (3h) Radiolabeling Of Protein A And Antibody To High Specific Activity: Application To Cell Surface Antigen Radioimmunoassays, Ronald L. Wilder, Catherine C. Yuen, Subbarao Bondada, Virgil L. Woods, Cornelius B. Alexander, Rose G. Mage
Tritium (3h) Radiolabeling Of Protein A And Antibody To High Specific Activity: Application To Cell Surface Antigen Radioimmunoassays, Ronald L. Wilder, Catherine C. Yuen, Subbarao Bondada, Virgil L. Woods, Cornelius B. Alexander, Rose G. Mage
Microbiology, Immunology, and Molecular Genetics Faculty Publications
Staphylococcal protein A and several different immunoglobulins have been radio-labeled to high specific activities (> 106 cpm/pg) by reductive methylation with tritiated (3H) sodium borohydride. The proteins retain excellent functional and antigenic properties. The utility of these reagents in a variety of assays for cell surface antigens is illustrated. The results indicate that this radiolabeling procedure may become the method of choice for many cell surface and solution immunoassays.
Macrobenthos Of Simmons Bayou And An Adjoining Residential Canal, James T. Mcbee, Walter T. Brehm
Macrobenthos Of Simmons Bayou And An Adjoining Residential Canal, James T. Mcbee, Walter T. Brehm
Gulf and Caribbean Research
Species composition, abundance and seasonal variations of benthic macroinvertebrates in Simmons Bayou, Mississippi, and an adjoining dead-end canal were investigated from July 1976 through June 1977. Cluster analysis of the data summed over five stations indicated four major time periods: July, August-November, December-February, and March-June. Polychaetes and oligochaetes were most abundant in the winter and spring, amphipods in the summer, and chironomids in the spring. Temporal changes in abundance of polychaetes, oligochaetes, and chironomids appeared to reflect seasonal reproductive cycles. The peak in amphipod density corresponded with dense growths of Ruppia maritima. Within the dead-end canal, poor water quality …
Notes On The Genus Probythinella Thiele, 1928 (Gastropoda: Hydrobiidae) In The Coastal Waters Of The Northern Gulf Of Mexico And The Taxonomic Status Of Vioscalba Louisianae Morrison, 1965, Richard W. Heard
Gulf and Caribbean Research
The gastropod genus Probythinella Thiele, 1928, is considered a senior synonym of Vioscalba Morrison, 1965. Probythinella louisianae (Morrison, 1965) n. comb. tentatively is recognized as a valid species distinct from the closely related P. lacustris (Baker, 1928) and P. protera Pilsbry, 1953. The eastern range of P. louisianae is extended to Mobile Bay, Alabama. Limited observations on the habitat and reproduction of P. louisianae are reported.
Zinc Uptake In Loblolly Pine Seedlings, Victor Zillmer
Zinc Uptake In Loblolly Pine Seedlings, Victor Zillmer
Electronic Theses and Dissertations
Zinc concentrations in the root, terminal growth, stem, and needles of loblolly pine (Pinus taeda L.) were measured in 72 seedlings grown in washed sand, fertilized with Zn(N03)2. Zinc treatment periods were early spring, late spring, and summer. Zinc uptake was the greatest in early spring. Zinc nitrate fertilizer and remaining soil zinc at treatments end had no effect on mycorrhizae, height, or diameter growth. Linear and multiple regressions were derived using residual soil zinc and treatment zinc that can predict zinc concentrations in different plant parts that have r values from .7440 to .8170. Linear regressions for the prediction …
A Survey Of Plants And Animals Of Hill And Wendover Bombing Ranges, Western Utah, Mary Sue Fisher
A Survey Of Plants And Animals Of Hill And Wendover Bombing Ranges, Western Utah, Mary Sue Fisher
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The United States Air Force was required by the Sikes Act (16 USC 670 et seq.) to operate Hill and Wendover Bombing Ranges under a Land and Wildlife Management Plan consistent with military objectives. A preliminary biological inventory was conducted to provide basic information necessary for preparation of an appropriate management plan. The inventory was conducted over a one year period utilizing 60 field days on the ground and 30 hours of flying time. A list of vertebrates present on the bombing ranges was formed by general observation of large mammals, birds and reptiles, and trapping of small mammals. …
Abstracts Of Contributed Papers, Iowa Academy Of Science [90th Meeting], April 21-22, 1978, Iowa Academy Of Science
Abstracts Of Contributed Papers, Iowa Academy Of Science [90th Meeting], April 21-22, 1978, Iowa Academy Of Science
Iowa Academy of Science Documents
Presentation abstracts from the annual meeting of the Iowa Academy of Science
Effects Of 1973 Floodwaters On Plankton Populations In Louisiana And Mississippi, Suzanne R. Hawes, Harriet M. Perry
Effects Of 1973 Floodwaters On Plankton Populations In Louisiana And Mississippi, Suzanne R. Hawes, Harriet M. Perry
Gulf and Caribbean Research
Studies to assess the impact of floodwater diversion on plankton populations in coastal waters of Mississippi and Louisiana were conducted from 23 April 1973 through 13 July 1973. Fixed stations in Lake Pontchartrain, Lake Borgne and western Mississippi Sound were sampled once in April, twice in May and June, and once in July. Stations in Terrebonne Parish, Louisiana were visited once in May, June and July.
Data are presented on changes in the species composition of zooplankton subsequent to the opening of the Bonnet Card and Morganza floodways. The hydrographic conditions at the time of sampling are discussed.
Distribution And Ecology Of Great Blue Heron Colonies On The Willamette River, Oregon, Scott M. English
Distribution And Ecology Of Great Blue Heron Colonies On The Willamette River, Oregon, Scott M. English
Geography Faculty Publications and Presentations
In the United States there is breeding ecology information available on the Great Blue Heron (Ardea herodias), but large-scale distributional and productivity information is lacking. In the lake regions of the Canadian provinces of Alberta, Manitoba, and Saskatchewan, regional surveys of Great Blue Heron nesting sites have been done by Vermeer and Reynolds (1970) and Vermeer (1969). Breeding biology studies were done in California (Pratt 1970, Page 1971), Canada (Vermeer 1969, McAloney 1973), and Oregon (Henny and Bethers 1971). In 1974 a survey of Great Blue Heron heronries on the Oregon Coast was completed through a National Science …
Studies On Uveitis Part I: Aqueous Studies, Philip C. Hessburg
Studies On Uveitis Part I: Aqueous Studies, Philip C. Hessburg
Henry Ford Hospital Medical Journal
Aqueous microbiological and cytological studies were performed on 134 anterior chamber taps done on 118 patients both with and without uveitis. Cell wall defective bacterial forms (CWDF) were recovered from about 40% of these aqueous specimens and classical bacteria were recovered from 12%. A statistically significant difference could not be found between the incidence of bacterial cell wall defective forms in the various anatomical types of uveitis. There were hints from this work that the presence of CWDF In the aqueous was more frequent in younger patients with uveitis, early in the uveitis attack, if there were multiple foci of …
Algal Response To A Thermal Effluent : Study Of A Power Station On The Provo River, Utah, Usa, Lorin E. Squires
Algal Response To A Thermal Effluent : Study Of A Power Station On The Provo River, Utah, Usa, Lorin E. Squires
Theses and Dissertations
The effect of a thermal effluent on the attached algae of the Provo River, Utah, USA, was studied from 1975 to 1977. Data for macroscopic and microscopic algae were collected and analyzed. Diatoms, Cladophora glomerata, and Hydrurus foetidus dominated the flora. The thermal effluent significantly affected the algal flora in a section of river 100 to 135 meters long immediately below the discharge point. Cladophora growth was increased and Hydrurus was absent in this area. In addition, diatom production was often higher and diversity lower than in the rest of the river. Community structure was unique from all other adjacent …
A Multivariate Study Of The Family Molossidae (Mammalia, Chiroptera): Morphology, Ecology, Evolution, Patricia Waring Freeman
A Multivariate Study Of The Family Molossidae (Mammalia, Chiroptera): Morphology, Ecology, Evolution, Patricia Waring Freeman
Biology ETDs
The Molossidae is a worldwide, mostly tropical family of bats. This analysis examines what phenetically similar groups occur within the family; what ecological role species of molossids may have; and, finally, what kind of evolutionary relationships exist among phenetically similar species.
Seventy-six characters were taken on each of eighty species of molossids and analyzed by principal components, distance (size-in and size-out), and correlation analyses from the NT-SYS package of multivariate statistical programs. Phenetically similar bats are grouped and described morphologically. Morphological trends which are revealed by the principal components analysis are used to make ecological predictions about the bats' feeding …
The Influence Of Various Factors On Nitrogen Balance And Protein Quality Measured In Adult Human Beings, Arthur John Wittwer
The Influence Of Various Factors On Nitrogen Balance And Protein Quality Measured In Adult Human Beings, Arthur John Wittwer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The effect of nitrogen intake, nitrogen source, calorie intake, body weight, adaptation time, research group and sex on the nitrogen balance of human adults was investigated. Data from studies reported in the literature were combined and analyzed statistically by multiple regression techniques. Analyses were made separately for six sources of nitrogen: egg, beef, rice, corn, wheat and wheat gluten.
Nitrogen intake, caloric intake and body weight exerted significant effects on nitrogen balance (5% level of confidence) for six, three and two of the six nitrogen sources, respectively. Other variables were not significant at the 5% level. Although differences were not …
Environmental Interaction In Summer Algal Communities Of Utah Lake, Mark C. Whiting
Environmental Interaction In Summer Algal Communities Of Utah Lake, Mark C. Whiting
Theses and Dissertations
Utah Lake is a shallow eutrophic lake located in central Utah. It is characterized by high nutrient and silt loads and by large algal blooms in late summer and early fall. Phytoplankton samples and environmental data were taken from June through August 1974. Phytoplankton species were identified and then quantified in a Palmer counting cell. Environmental continuum theory was employed to describe algal succession and regression analysis was used to discover interactions between algal communities and the environment. Phytoplankton communities in June were characterized by high species diversity. As the lake environment became stressed in late summer due to higher …
The European Wasp : A New Threat To W.A, Department Of Agriculture, Western Australia
The European Wasp : A New Threat To W.A, Department Of Agriculture, Western Australia
Journal of the Department of Agriculture, Western Australia, Series 4
The European wasp was detected in Western australia for the first time in January and February 1977 in the metropolitan suburbs of Mosman Park, Cottesloe and Attadale.
So far it has only been found within an area of 8 km radius from Fremantle but the outer boundries of the infestation are still uncertain.
It is Department of agriculture policy to eradicate the European wasp, if possible, and to destroy all nests detected.
The Effect Of Depth On Survival And Growth Of Oysters In Suspension Culture From A Petroleum Platform Off The Texas Coast, John Ogle, Sammy M. Ray, W.J. Wardle
The Effect Of Depth On Survival And Growth Of Oysters In Suspension Culture From A Petroleum Platform Off The Texas Coast, John Ogle, Sammy M. Ray, W.J. Wardle
Gulf and Caribbean Research
The effect of depth on oysters in suspension culture from a petroleum platform off the Texas coast was monitored for 20 months. Growth and condition was similar for adult oysters cultured at five levels down to 8 m. Oysters had a growth rate of 1.2 mm (level 3) to 1.4 mm (level 1) per month,representing an increase in length of 94% to 150% for the 20 months. The condition was best in June 1973 after five months placement offshore (condition index of 14.8, 15.5, 14.7, 13.5 and 13.2 for levels 1 through 5, respectively). The condition was lowest in June …
Interrelationships Of Hypera Postica (Gyllenhal) (Coleoptera: Curculionidae) And Bathyplectes Curculionis (Thomson) (Hymenoptera: Ichneumonidae) In Illinois With Emphasis On Host-Parasite Densities, Distribution Of Parasites Within Available Hosts And Estimates Of Percent Parasitism, Robert John Barney
Masters Theses
In an attempt to better understand the host-parasite relationship of the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) and Bathyplectes curculionis (Thomson) (Hymenoptera: Ichneumonidae), all life stages of the parasite were monitored throughout the spring. Sampling was conducted on a degree day basis from early March to late May in an alfalfa field in Mason County, Illinois.
Dissections of host alfalfa weevil larvae revealed 2nd and 3rd host instars were preferred larvae for oviposition. Peak parasite densities were found to precede peak total host larval densities, but coincided with peak densities of the preferred 2nd and 3rd instars. Larger host …
Biological And Chemical Evaluation Of The Aquatic Environment Of Selected Undeveloped Kentucky Lake Embayments, Marshall Gordon, Morgan E. Sisk
Biological And Chemical Evaluation Of The Aquatic Environment Of Selected Undeveloped Kentucky Lake Embayments, Marshall Gordon, Morgan E. Sisk
KWRRI Research Reports
This report describes research involving biological and chemical analysis of two undeveloped embayments on Kentucky Lake, namely Anderson and Vickers Bays. Field and laboratory studies were made to assess current biotic standing crops, limnological conditions, levels of inorganic and organic pollutants in the embayments.
Some Aspects Of The Ecology Of The Virginia Opossum (Didelphis Virginiana Virginiana Kerr 1792) In An Urban Environment, David Hopkins
Some Aspects Of The Ecology Of The Virginia Opossum (Didelphis Virginiana Virginiana Kerr 1792) In An Urban Environment, David Hopkins
Dissertations and Theses
Eighty-three Didelphis virginiana from the Portland metropolitan area were collected and studied from December 1974 through May 1976. Males averaged 3394 g, females 2318 g. An annual sex ratio of 68.7:31.3 was recorded. Data indicate the possibility of a year-round breeding season and suggest the occurrence of three peaks of reproductive activity: January-February, April-May and October-November. The six primary foods consumed annually are: leaf litter, mammals, gastropods, earthworms, grasses and pet food. Seasonal composition and diversity in the diet is marked. Five new parasite-host records were established. These include mites: Androlaelaps fahrenholsi, Haemogamasus nidi, Eulaelape stabularis tick, Ixodes angustus, and …