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2001

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Articles 1891 - 1920 of 2477

Full-Text Articles in Life Sciences

Spatial And Temporal Distribution Of Tsetse Fly Trap Catches At Nguruman, Southwest Kenya, A. Odulaja, J. Baumgärtner, S. Mihok, I. M. Abu-Zinid Jan 2001

Spatial And Temporal Distribution Of Tsetse Fly Trap Catches At Nguruman, Southwest Kenya, A. Odulaja, J. Baumgärtner, S. Mihok, I. M. Abu-Zinid

All Peer-Reviewed Publications

Spatial and temporal dynamics of rapidly growing populations of tsetse flies at Nguruman, southwest Kenya during 1993-1995, were investigated, following six years of intensive population suppression with traps over a c. 100 km2 area. The two tsetse species present were randomly distributed in the short rainy season, but were aggregated in the dry and long rainy seasons. Maximum temperature was the dominant weather factor associated with the degree of aggregation. Trends in catches at 20 fixed sites along an 18 km north-south axis were weakly correlated between locations, possibly representing population sub-structuring. In particular, trends in population change were poorly …

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Infection And Transovarial Transmission Of Rickettsiae In Dermacentor Variabilis Acquired By Artificial Feeding, K. R. Macaluso, Daniel E. Sonenshine, Shane M. Ceraul, A. F. Azad Jan 2001

Infection And Transovarial Transmission Of Rickettsiae In Dermacentor Variabilis Acquired By Artificial Feeding, K. R. Macaluso, Daniel E. Sonenshine, Shane M. Ceraul, A. F. Azad

Biological Sciences Faculty Publications

In this study we examined the efficiency of an in vitro feeding technique using glass microcapillaries as a method of establishing rickettsiae-infected lines of ticks. To quantify the volume ingested by ticks during microcapillary feeding, the incorporation of radiolabeled amino acids in tick gut and hemolymph was calculated. Fifteen of 18 ticks consumed between 0.06 μl and 6.77μl. However, ingestion of fluid was not correlated to weight gain during capillary feeding. Uninfected and partially fed laboratory-reared female Dermacentor variabilis ticks were exposed to either Rickettsia montana- or Rickettsia rhipicephali-infected Vero cells via microcapillary tubes, returned to rabbit hosts, …

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Aerobic Respiratory Costs Of Swimming In The Negatively Buoyant Brief Squid Lolliguncula Brevis, Ian K. Bartol, Roger Mann, Mark R. Patterson Jan 2001

Aerobic Respiratory Costs Of Swimming In The Negatively Buoyant Brief Squid Lolliguncula Brevis, Ian K. Bartol, Roger Mann, Mark R. Patterson

Biological Sciences Faculty Publications

Because of the inherent inefficiency of jet propulsion, squid are considered to be at a competitive disadvantage compared with fishes, which generally depend on forms of undulatory/oscillatory locomotion. Some squid, such as the brief squid Lolliguncula brevis, swim at low speeds in shallow-water complex environments, relying heavily on fin activity. Consequently, their swimming costs may be lower than those of the faster, more pelagic squid studied previously and competitive with those of ecologically relevant fishes. To examine aerobic respiratory swimming Costs, O2 consumption rates were measured for L. brevis of various sizes (2-9 cm. dorsal mantle length, DML) …

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Hydrologic Events And Water Quality In The Pigeon River, Ottawa County, Michigan, Neil W. Macdonald, Richard R. Rediske, Jonathan E. Van Denend Jan 2001

Hydrologic Events And Water Quality In The Pigeon River, Ottawa County, Michigan, Neil W. Macdonald, Richard R. Rediske, Jonathan E. Van Denend

Peer Reviewed Publications

The Pigeon River drains a 16,765-ha agricultural watershed in western Ottawa County, Michigan and discharges into south-central Lake Michigan. Extensive areas of wetlands in the upper watershed were drained in the 1920s, causing significantly altered hydrology characteristics by flashy discharges during storms and periods of snowmelt. We studied stream chemistry and hydrology for a four-year period between September, 1996, and October, 2000, to determine water quality status, to estimate annual nutrient exports, and to evaluate the effects of different seasonal flow types. Results of our study confirmed that the upper reaches of the Pigeon River experience chronically degraded water quality, …

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Biennialism And Vernalization-Promoted Flowering In Hyoscyamus Niger: A Comparison With Arabidopsis, Michael Schläppi, Monica Patel Jan 2001

Biennialism And Vernalization-Promoted Flowering In Hyoscyamus Niger: A Comparison With Arabidopsis, Michael Schläppi, Monica Patel

Biological Sciences Faculty Research and Publications

There are genetic similarities between the biennial growth habit of Hyoscyamus niger (H. niger) and winter annual ecotypes of Arabidopsis thaliana, including the response to demethylating agents. One focus of our research group at Marquette is to determine whether FLOWERING LOCUS C (FLC) homologs or FLC-related MADS-box genes are involved in biennialism of H. niger. This review also summarizes our initial characterization of expression profiles of 4 groups of H. niger MADS-box genes. Our results suggest that B-class floral homeotic gene homologs of H. niger are differentially expressed in flowers of annual and …

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Protransglutaminase (Factor Xiii) Mediated Crosslinking Of Fibrinogen And Fibrin, Kevin R. Siebenlist, David A. Meh, Michael W. Mosesson Jan 2001

Protransglutaminase (Factor Xiii) Mediated Crosslinking Of Fibrinogen And Fibrin, Kevin R. Siebenlist, David A. Meh, Michael W. Mosesson

Biological Sciences Faculty Research and Publications

No abstract provided.

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Effects Of Depolarization And Low Intracellular Ph On Charge Movement Currents Of Frog Skeletal Muscle Fibers, Edward Michael Balog, Robert H. Fitts Jan 2001

Effects Of Depolarization And Low Intracellular Ph On Charge Movement Currents Of Frog Skeletal Muscle Fibers, Edward Michael Balog, Robert H. Fitts

Biological Sciences Faculty Research and Publications

The low intracellular pH and membrane depolarization associated with repeated skeletal muscle stimulation could impair the function of the transverse tubular (t tubule) voltage sensor and result in a decreased sarcoplasmic reticulum Ca2+ release and muscle fatigue. We therefore examined the effects of membrane depolarization and low intracellular pH on the t-tubular charge movement. Fibers were voltage clamped in a double Vaseline gap, at holding potential (HP) of 290 or 260 mV, and studied at an internal pH of 7.0 and 6.2. Decreasing intracellular pH did not significantly alter the maximum amount of charge moved, transition voltage, or steepness …

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Menu Planning Tips, Unknown Unknown Jan 2001

Menu Planning Tips, Unknown Unknown

All Current Publications

No abstract provided.

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How To Get 2 To 4 Servings Of Fruit A Day, Unknown Unknown Jan 2001

How To Get 2 To 4 Servings Of Fruit A Day, Unknown Unknown

All Current Publications

No abstract provided.

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How To Get 3 To 5 Servings Of Vegetables A Day, Unknown Unknown Jan 2001

How To Get 3 To 5 Servings Of Vegetables A Day, Unknown Unknown

All Current Publications

No abstract provided.

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Give Trees A Chance, Dennis Hinkamp Jan 2001

Give Trees A Chance, Dennis Hinkamp

All Current Publications

No abstract provided.

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Morning Glory Is Gory, Dennis Hinkamp Jan 2001

Morning Glory Is Gory, Dennis Hinkamp

All Current Publications

No abstract provided.

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Put Me In Cloche, I'M Ready To Grow, Dennis Hinkamp Jan 2001

Put Me In Cloche, I'M Ready To Grow, Dennis Hinkamp

All Current Publications

No abstract provided.

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Woad Rage, Dennis Hinkamp Jan 2001

Woad Rage, Dennis Hinkamp

All Current Publications

No abstract provided.

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Codling Moths Create New Protein-Enriched, Aerated Apples, Dennis Hinkamp Jan 2001

Codling Moths Create New Protein-Enriched, Aerated Apples, Dennis Hinkamp

All Current Publications

No abstract provided.

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Fending Off Aphids, Dennis Hinkamp Jan 2001

Fending Off Aphids, Dennis Hinkamp

All Current Publications

No abstract provided.

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Intermountain Planting Guide, Kevin Jensen, Howard Horton, Ron Reed, Ralph Whitesides Jan 2001

Intermountain Planting Guide, Kevin Jensen, Howard Horton, Ron Reed, Ralph Whitesides

All Current Publications

The first consideration prior to seeding is to determine the present level of management being applied to the proposed site. Many sites will recover or improve without seeding if proper management is implemented. Soil is the primary natural resource and its conservation is the most important consideration in seedings.

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Abiotic Vs. Biotic Influences On Habitat Selection Of Coexisting Species: Climate Change Impacts?, Thomas E. Martin Jan 2001

Abiotic Vs. Biotic Influences On Habitat Selection Of Coexisting Species: Climate Change Impacts?, Thomas E. Martin

Wildlife Biology Faculty Publications

Species are commonly segregated along gradients of microclimate and vegetation. I explore the question of whether segregation is the result of microhabitat partitioning (biotic effects) or choice of differing microclimates (abiotic effects). I explored this question for four ground-nesting bird species that an segregated along a microclimate and vegetation gradient in Arizona. Birds shifted position of their nests on the microhabitat and microclimate gradient in response to changing precipitation over nine years. Similarly, annual bird abundance varied with precipitation across 12 yr. Those shifts in abundance and nesting microhabitat with changing precipitation demonstrate the importance of abiotic influences on bird …

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Overcoming America's Wood Deficit: An Overlooked Option, Carl E. Fiedler, Stephen F. Arno, Charles E. Keegan, Keith A. Blatner Jan 2001

Overcoming America's Wood Deficit: An Overlooked Option, Carl E. Fiedler, Stephen F. Arno, Charles E. Keegan, Keith A. Blatner

Forest Management Faculty Publications

No abstract provided.

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Use Of Red Mangrove For Nesting By Snail Kites In Florida, Victoria J. Dreitz, Jamie A. Duberstein Jan 2001

Use Of Red Mangrove For Nesting By Snail Kites In Florida, Victoria J. Dreitz, Jamie A. Duberstein

Wildlife Biology Faculty Publications

During 1999 we monitored Snail Kite nesting activity throughout central and south Florida as part of an ongoing study from 1995 to 1999 evaluating the influences of environmental variation on the demography of the Florida population of Snail Kites. We discovered three nests in red mangrove built approximately 2 m above water. These nests were located in the stairstep unit of Big Cypress National Preserve and Everglades National Park, south ofHwy 441 in Lostman's Slough.

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Behavioral Interactions Between Coexisting Species: Song Playback Experiments With Wood Warblers, P. R. Martin, Thomas E. Martin Jan 2001

Behavioral Interactions Between Coexisting Species: Song Playback Experiments With Wood Warblers, P. R. Martin, Thomas E. Martin

Wildlife Biology Faculty Publications

Behavioral interactions between coexisting species may reflect underlying ecological interactions or may arise from factors unrelated to ecological interactions between species. We examined behavioral interactions between two coexisting, migratory wood warblers that competitively interact on breeding territories in central Arizona, USA. The larger Orange-crowned Warbler (Vermivora celata) is aggressive toward the later-arriving Virginia's Warbler (V. virginiae) and responds to playback of Virginia's Warbler songs by approaching the playback speaker or by singing over Virginia's Warbler songs. Virginia's Warblers retreat from interactions with Orange-crowned Warblers and avoid the playback speaker when presented with Orange-crowned Warbler songs. Responses of both species to …

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Non–Water–Stressed Baseline As A Tool For Dynamic Control Of A Misting System For Propagation Of Poinsettias, Sérgio Zolnier, Richard S. Gates, Robert G. Anderson, Sue E. Nokes, George A. Duncan Jan 2001

Non–Water–Stressed Baseline As A Tool For Dynamic Control Of A Misting System For Propagation Of Poinsettias, Sérgio Zolnier, Richard S. Gates, Robert G. Anderson, Sue E. Nokes, George A. Duncan

Biosystems and Agricultural Engineering Faculty Publications

A technique is presented for dynamically adjusting misting intervals during propagation of vegetative cuttings. A crop setpoint temperature for activation of misting was defined by a "non-water-stressed baseline" concept, using infrared thermometry to acquire canopy temperature for plant feedback. The critical crop setpoint temperature was calculated from instantaneous values of air temperature, incident radiation, and air vapor pressure deficit (VPDair). Misting was activated when the actual crop temperature exceeded the critical crop setpoint temperature. The dynamic control was shown to have the potential to reduce the amount of applied water from 9 to 12 times during low levels …

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Gulf Estuarine Research Society Fall 2000 Meeting Abstracts Jan 2001

Gulf Estuarine Research Society Fall 2000 Meeting Abstracts

Gulf and Caribbean Research

The Fall 2000 meeting of the Gulf Estuarine Research Society (GERS) was held at the Holiday Inn in Hammond, Louisiana on Monday and Tuesday, November 13 and 14, 2000. Local arrangements were organized by Denise J. Reed (University of New Orleans) and Robert W. Hastings (Southeastern Louisiana University) with significant support from Carolyn Woosley and Dr. Gary P. Shaffer. The Scientific Program was organized by Mark S. Peterson (The University of Southern Mississippi).

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Utilization Of Saltmarsh Shorelines By Newly Settled Sciaenids In A Texas Estuary, Bert W. Geary, Jay R. Rooker, James W. Webb Jan 2001

Utilization Of Saltmarsh Shorelines By Newly Settled Sciaenids In A Texas Estuary, Bert W. Geary, Jay R. Rooker, James W. Webb

Gulf and Caribbean Research

Post-settlement patterns of habitat use along saltmarsh shorelines of Galveston Bay, Texas were examined for three sciaenids; spotted seatrout (Cynoscion nebulosus), red drum (Sciaenops ocellatus), and Atlantic croaker (Micropogonias undulatus). Collections were made summer through fall of 1997 and 1998 using a 1.5-m beam trawl hand-towed along the outside edge of salt marshes. Sciaenids were collected from tidal pass, bay, and remote tidal creek areas to assess large-scale (bay-wide) patterns of distribution and abundance. Cynoscion nebulosus were smaller and most numerous at bay stations, with densities peaking in June. Conversely, S. ocellatus were collected …

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Gastropod Larvae And Zooplankton In Reef-Related Areas Of The Western Caribbean Sea, Alberto De Jesus-Navarrete, Jose Juan Oliva-Rivera Jan 2001

Gastropod Larvae And Zooplankton In Reef-Related Areas Of The Western Caribbean Sea, Alberto De Jesus-Navarrete, Jose Juan Oliva-Rivera

Gulf and Caribbean Research

In order to estimate the composition, distribution and abundance of zooplankton in 3 areas off the western Caribbean, samples were collected in 15 stations at South Coast and Chinchorro Bank, Mexico, and Hol-Chan Belize, from April to December 1996. Duplicate samples (2.5 m3) were collected bimonthly using a submersible pump. The pumped water was filtered through a 202 μm mesh net yielding a total of 20 zooplankton groups. Chinchorro Bank had 19 groups, South Coast had 15 groups, and Hol-Chan had 14 groups. The most abundant groups were copepods (43.1%), fish eggs (29.0%), foraminifera (12.0%), decapod larvae (5.7%) …

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Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii Jan 2001

Twenty-Five Years Of Population Fluctuations Of Microtus Ochrogaster And M-Pennsylvanicus In Three Habitats In East-Central Illinois, Lowell L. Getz, Joyce E. Hofmann, Betty Mcguire, Thomas W. Dolan Iii

Biological Sciences Faculty Publications

Populations of 2 species of arvicoline rodents, the prairie vole (Microtus ochrogaster) and meadow vole (M. pennsylvanicus), were monitored monthly in alfalfa, bluegrass, and tallgrass prairie habitats in east-central Illinois from 1972 through 1997. Alfalfa provides very highquality preferred food and poor vegetative cover for both vole species, whereas bluegrass provides intermediate food and vegetative cover. Preferred food resources were very low, especially for M. ochrogaster, and vegetative cover was very dense in tallgrass prairie. Maximum and mean population densities of M. ochrogaster were highest in alfalfa, intermediate in bluegrass, and lowest in tallgrass prairie. …

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Analysis Of Wine For Penicillin, Gary Morris, James Yuan, Roy Williams Jan 2001

Analysis Of Wine For Penicillin, Gary Morris, James Yuan, Roy Williams

Chemistry & Biochemistry Faculty Publications

This study addresses the question of whether the antibiotic Penicillin, which is produced by the common mold Penicillium notatum, could possibly become a contaminate of wine during the fermentation process. The significance of this study is related to the potential health effects this agent might produce in those consumers who have an allergic response to Penicillin. It has been estimated that between 6% and 8% of the American population is subject to this type of allergic response. A method is developed for the detection of penicillin in wines using high-pressure liquid chromatography. We demonstrate that penicillin G hydrolyzes rapidly …

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Classification And Identification Of Pfiesteria And Pfiesteria-Like Species, Karen Steidinger, Jan Landsberg, R. William Richardson, Earnest Truby, Barbara Blakesley, Paula Scott, Patricia Tester, Torstein Tengs, Patrice Mason, Stever Morton, David Seaborn, Wayne Litaker, Kimberly Reece, David Oldach, Leonard Haas, Gerardo Vasta Jan 2001

Classification And Identification Of Pfiesteria And Pfiesteria-Like Species, Karen Steidinger, Jan Landsberg, R. William Richardson, Earnest Truby, Barbara Blakesley, Paula Scott, Patricia Tester, Torstein Tengs, Patrice Mason, Stever Morton, David Seaborn, Wayne Litaker, Kimberly Reece, David Oldach, Leonard Haas, Gerardo Vasta

Biological Sciences Faculty Publications

Dinoflagellates can be classified both botanically and zoologically; however, they are typically put in the botanical division Pyrrhophyta. As a group they appear most related to the protistan ciliates and apicomplexans at the ultrastructure level. Within the Pyrrhophyta are both unarmored and armored forms of the dominant, motile flagellated stage. Unarmored dinoflagellates do not have thecal or wall plates arranged in specific series, whereas armored species have plates that vary in thickness but are specific in number and arrangement. In armored dinoflagellates, the plate pattern and tabulation is a diagnostic character at the family, subfamily, and even genus levels. In …

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Receptor Number And Caveolar Co-Localization Determine Receptor Coupling Efficiency To Adenylyl Cyclase, Rennolds S. Ostrom, Caroline Gregorian, Ryan M. Drenan, Yang Xiang, John W. Regan, Paul A. Insel Jan 2001

Receptor Number And Caveolar Co-Localization Determine Receptor Coupling Efficiency To Adenylyl Cyclase, Rennolds S. Ostrom, Caroline Gregorian, Ryan M. Drenan, Yang Xiang, John W. Regan, Paul A. Insel

Pharmacy Faculty Articles and Research

Recent evidence suggests that many signaling molecules localize in microdomains of the plasma membrane, particularly caveolae. In this study, overexpression of adenylyl cyclase was used as a functional probe of G protein-coupled receptor (GPCR) compartmentation. We found that three endogenous receptors in neonatal rat cardiomyocytes couple with different levels of efficiency to the activation of adenylyl cyclase type 6 (AC6), which localizes to caveolin-rich membrane fractions. Overexpression of AC6 enhanced the maximal cAMP response to β1-adrenergic receptor (β1AR)-selective activation 3.7-fold, to β2AR-selective activation only 1.6-fold and to prostaglandin E2 (PGE2) not at all. Therefore, the rank order of efficacy in …

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The Reproductive Biology And Temporal Distribution Of A Great Egret And Nankeen Night Heron Colony At The Perth Zoo, Robyn Phillimore Jan 2001

The Reproductive Biology And Temporal Distribution Of A Great Egret And Nankeen Night Heron Colony At The Perth Zoo, Robyn Phillimore

Theses: Doctorates and Masters

A colony of Great Egrets (Ardea alba) and Nankeen Night Herons (Nycticorax caledonicus) has existed at the Perth Zoo in Metropolitan Perth for over 25 years. The colony is particularly significant for the conservation and management of Great Egrets in Western Australia as it is the only colony located in the Metropolitan area. Baseline information of their breeding biology was needed to facilitate the development of management guidelines for the zoo colony. Foraging behaviour was used to highlight specific adaptations in hunting strategies and diet. However, it was not possible to observe foraging Nankeen Night Herons as they forage at …

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