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Articles 1 - 24 of 24

Full-Text Articles in Life Sciences

Stability At Hydrothermal-Vent Mussel Beds: Dynamics At Hydrothermal Vents: Evidence For Stable Macrofaunal Communities In Mussel Beds On The Northern East Pacific Rise, Jennifer Carolyn Dreyer Jan 2004

Stability At Hydrothermal-Vent Mussel Beds: Dynamics At Hydrothermal Vents: Evidence For Stable Macrofaunal Communities In Mussel Beds On The Northern East Pacific Rise, Jennifer Carolyn Dreyer

Dissertations, Theses, and Masters Projects

No abstract provided.


Effects Of Overexpressing Alternative Isoform Pax-5e In Vivo, Suzanne Elizabeth Cole Jan 2004

Effects Of Overexpressing Alternative Isoform Pax-5e In Vivo, Suzanne Elizabeth Cole

Dissertations, Theses, and Masters Projects

No abstract provided.


Energetically Costly Mate Sampling And Female Zebra Finch Choice, Timothy Ryan Crabtree Jan 2004

Energetically Costly Mate Sampling And Female Zebra Finch Choice, Timothy Ryan Crabtree

Dissertations, Theses, and Masters Projects

No abstract provided.


Bird Conservation Value Of Golf Courses, Joshua Elliott Leclerc Jan 2004

Bird Conservation Value Of Golf Courses, Joshua Elliott Leclerc

Dissertations, Theses, and Masters Projects

No abstract provided.


Do Sulfide-Oxidizing Bacteria Produce Light?, Rachel Elizabeth Ann Horak Jan 2004

Do Sulfide-Oxidizing Bacteria Produce Light?, Rachel Elizabeth Ann Horak

Dissertations, Theses, and Masters Projects

No abstract provided.


Parasitism In Deep-Sea Chemosynthetic Mussels: Parasitism In Bathymodiolus Mussels From Deep-Sea Seep And Hydrothermal Vents, Megan E. Ward Jan 2004

Parasitism In Deep-Sea Chemosynthetic Mussels: Parasitism In Bathymodiolus Mussels From Deep-Sea Seep And Hydrothermal Vents, Megan E. Ward

Dissertations, Theses, and Masters Projects

No abstract provided.


Plumage As A Habitat For Bacilli, Justine M. Whitaker Jan 2004

Plumage As A Habitat For Bacilli, Justine M. Whitaker

Dissertations, Theses, and Masters Projects

No abstract provided.


Dynamics Of The Host-Parasite Interaction: In Vitro Correlates Of Crassostrea-Induced Modulation Of Perkinsus Marinus Function, Christopher G. Earnhart Jan 2004

Dynamics Of The Host-Parasite Interaction: In Vitro Correlates Of Crassostrea-Induced Modulation Of Perkinsus Marinus Function, Christopher G. Earnhart

Dissertations, Theses, and Masters Projects

Perkinsus marinus is an alveolate protozoan parasite of the eastern oyster (Crassostrea virginica) which is responsible for much of the decline in United States oyster populations. Perkinsus marinus can be cultured in vitro, but is rapidly attenuated in the process. Supplementation of a protein-free medium with oyster products altered proliferation, changed protease expression in the parasite extracellular products (ECP), induced morphological forms typically seen in vivo, and partially reversed parasite attenuation. Supplements derived from dissected oyster tissues were used to determine if these changes could be differentially elicited. These supplements, with the exception of adductor muscle, reduced proliferation. Whole oyster ...


Vegetation Dynamics Of A Tidal Freshwater Marsh: Long-Term And Inter-Annual Variability And Their Relationship To Salinity, Sarah B. Davies Jan 2004

Vegetation Dynamics Of A Tidal Freshwater Marsh: Long-Term And Inter-Annual Variability And Their Relationship To Salinity, Sarah B. Davies

Dissertations, Theses, and Masters Projects

No abstract provided.


Survival And Habitat Preferences Of White Marlin (Tetrapturus Albidus) Released From The Western North Atlantic Recreational Fishery, Andrij Z. Horodysky Jan 2004

Survival And Habitat Preferences Of White Marlin (Tetrapturus Albidus) Released From The Western North Atlantic Recreational Fishery, Andrij Z. Horodysky

Dissertations, Theses, and Masters Projects

No abstract provided.


Recommended Practices For Effective Teaching In The International Baccalaureate Program: An Examination Of Instructional Skills, Assessment Practices, And Teacher-Efficacy Beliefs Of Ib Teachers, Linda Prince Hutchinson Jan 2004

Recommended Practices For Effective Teaching In The International Baccalaureate Program: An Examination Of Instructional Skills, Assessment Practices, And Teacher-Efficacy Beliefs Of Ib Teachers, Linda Prince Hutchinson

Dissertations, Theses, and Masters Projects

The purpose of this study was to analyze the design and implementation of the International Baccalaureate Program for its fit as an advanced academic option. The first step involved determining the alignment of program and curricular goals with recommended practices for general and gifted education and, consequently, to examine the instructional practices and self-efficacy beliefs of International Baccalaureate teachers.;A review of literature revealed limited research on IB Program implementation and its grounding in recommended instructional practice. Therefore, a comparative analysis was conducted of IB program and curricular goals to determine their alignment with 21 recommended practices for gifted and ...


A Framework For Implementing Bioinformatics Knowledge-Exploration Systems, John A. Hayes Jan 2004

A Framework For Implementing Bioinformatics Knowledge-Exploration Systems, John A. Hayes

Dissertations, Theses, and Masters Projects

No abstract provided.


A Study Of The Eastern Oyster, Crassostrea Virginica: (1) Dermo Tolerance, Survival, Growth, Condition And Hsp70 Expression In Different Geographic Stocks; (2) Heat Tolerance And Effects Of Sublethal Heat Shock On Survival And Hsp70 Expression Of Infected And Uninfected Oysters, Vincent G. Encomio Jan 2004

A Study Of The Eastern Oyster, Crassostrea Virginica: (1) Dermo Tolerance, Survival, Growth, Condition And Hsp70 Expression In Different Geographic Stocks; (2) Heat Tolerance And Effects Of Sublethal Heat Shock On Survival And Hsp70 Expression Of Infected And Uninfected Oysters, Vincent G. Encomio

Dissertations, Theses, and Masters Projects

The diseases Dermo and MSX have devastated Chesapeake Bay populations of the eastern oyster, Crassostrea virginica. The protozoan Perkinsus marinus, which causes Dermo, is particularly problematic since it persists over a wide range of salinities and temperatures. An objective of this dissertation was to determine whether specific wild oyster stocks had developed natural resistance to Dermo and if several parameters (survival, growth, condition and energy reserves) were associated with resistance. Another objective was to characterize heat shock protein (hsp70) expression in the eastern oyster. Heat shock proteins such as hsp70 protect organisms from thermal stress and other stressors, and this ...


Pathobiology Of Mycobacteria In Striped Bass (Morone Saxatilis), David T. Gauthier Jan 2004

Pathobiology Of Mycobacteria In Striped Bass (Morone Saxatilis), David T. Gauthier

Dissertations, Theses, and Masters Projects

Striped bass (Morone saxatilis) in Chesapeake Bay, USA, are experiencing an epizootic of mycobacteriosis. This disease, caused by bacteria in the genus Mycobacterium, causes granulomatous lesions of the skin and viscera. Diseased fish are often emaciated, and fish with skin lesions may be significantly disfigured. The overall goal of this work was to examine aspects of the pathobiology of mycobacteria in striped bass via laboratory exposure studies and cellular assays. Striped bass were injected intraperitoneally with a sublethal dose of Mycobacterium marinum, M. shottsii, or M. gordonae and sampled for histology and bacteriology at regular intervals to 45 weeks post-injection ...


Ichthyofaunal And Dietary Analysis Of Sympatric Piscivores In A Chesapeake Bay Littoral Zone: Including Bioenergetic Models Of Growth And Diel Temperature Sanctuary Use, Christian Harding Hager Jan 2004

Ichthyofaunal And Dietary Analysis Of Sympatric Piscivores In A Chesapeake Bay Littoral Zone: Including Bioenergetic Models Of Growth And Diel Temperature Sanctuary Use, Christian Harding Hager

Dissertations, Theses, and Masters Projects

The first section of this dissertation describes the ichthyofaunal community of a mesohaline Chesapeake Bay April--November. Fish assemblages were sampled using two seine gears, a small seine that sampled 352 m 2 and a 914m haul-seine that sampled 144,473 m2. The small seine collected 32 finfish species. The larger gear captured 31 finfish species, including 17 that were not sampled by small gear. Sampled diversity was greater but density estimates were similar to those determined previously by other investigators using flume-net, drop-ring, and otter trawl techniques. Nocturnal abundance of larger fishes far exceeded daylight. Fish abundance and size distribution ...


Evaluating Restored Oyster Reefs In Chesapeake Bay: How Habitat Structure Influences Ecological Function, Janet A. Nestlerode Jan 2004

Evaluating Restored Oyster Reefs In Chesapeake Bay: How Habitat Structure Influences Ecological Function, Janet A. Nestlerode

Dissertations, Theses, and Masters Projects

A shortage of shell resources for restoring reefs of the Eastern oyster, Crassostrea virginica, has led to widespread use of substitute materials. The effectiveness of such alternative substrates as habitat for reef-associated fauna other than oysters is largely unresolved. I investigated the habitat value of oyster shell, surf clam (Spisula solidissima) shell, and pelletized coal ash reefs for benthic and nektonic communities. Oyster recruitment, survival, and growth were monitored on reefs of oyster and surf clam shell near the mouth of Chesapeake Bay and York River, USA. Oyster shell supported greater oyster growth and survival and offered the highest degree ...


Natural Dermo Resistance And Related Defense Mechanisms In Eastern Oysters, Crassostrea Virginica, With Implications For Restoration, Shawn Michael Stickler Jan 2004

Natural Dermo Resistance And Related Defense Mechanisms In Eastern Oysters, Crassostrea Virginica, With Implications For Restoration, Shawn Michael Stickler

Dissertations, Theses, and Masters Projects

American oyster (Crassostrea virginica) stocks on the East Coast in general, and in Chesapeake Bay in particular, have been in decline over the past half-century in large part due to Dermo disease, caused by the protist parasite Perkinsus marinus. Efforts to restore oysters for their ecological and economic value have centered on the development and use of hatchery-based seed selectively bred for disease resistance. Selective breeding could benefit from the incorporation of oysters from wild stocks that have developed "natural Dermo resistance", but few such stocks have been identified and verified. This dissertation describes reciprocal common-garden experiments carried out at ...


Sperm-Oocyte Membrane Interactions During Fertilization In The Nematode Caenorhabditis Elegans, Alissa Gale Richmond Jan 2004

Sperm-Oocyte Membrane Interactions During Fertilization In The Nematode Caenorhabditis Elegans, Alissa Gale Richmond

Dissertations, Theses, and Masters Projects

No abstract provided.


The Influence Of Salinity On Diet Composition, Provisioning Patterns, And Nestling Growth In Bald Eagles In The Lower Chesapeake Bay, Ann Catherine Markham Jan 2004

The Influence Of Salinity On Diet Composition, Provisioning Patterns, And Nestling Growth In Bald Eagles In The Lower Chesapeake Bay, Ann Catherine Markham

Dissertations, Theses, and Masters Projects

No abstract provided.


Structured Writing And Humor: The Use Of Humor As A Component In Structure Writing And Its Effect On Health Symptoms And Perceived Stress, Evie J. Gerber Jan 2004

Structured Writing And Humor: The Use Of Humor As A Component In Structure Writing And Its Effect On Health Symptoms And Perceived Stress, Evie J. Gerber

Dissertations, Theses, and Masters Projects

No abstract provided.


Investigation Of Relationships Between Short-Term Photosynthetic Performance And Long-Term Growth Of Zostera Marina, Elizabeth Amy Lewis Jan 2004

Investigation Of Relationships Between Short-Term Photosynthetic Performance And Long-Term Growth Of Zostera Marina, Elizabeth Amy Lewis

Dissertations, Theses, and Masters Projects

No abstract provided.


Spatial Variations In Benthic Invertebrate Assemblages In And Around The Georges Banks Closed Areas, Andrew Clayton Walker Jan 2004

Spatial Variations In Benthic Invertebrate Assemblages In And Around The Georges Banks Closed Areas, Andrew Clayton Walker

Dissertations, Theses, and Masters Projects

No abstract provided.


Reproductive Biology Of American Shad, Alosa Sapidissima, In The Mattaponi River, Aaron Reid Hyle Jan 2004

Reproductive Biology Of American Shad, Alosa Sapidissima, In The Mattaponi River, Aaron Reid Hyle

Dissertations, Theses, and Masters Projects

No abstract provided.


Metapopulation Dynamics, Habitat Quality, And Spatial Scale: Variation In Reproductive Output Of The Baltic Clam, Macoma Balthica, In Shallow Systems Of The Chesapeake Bay, Kristen Adams Delano Jan 2004

Metapopulation Dynamics, Habitat Quality, And Spatial Scale: Variation In Reproductive Output Of The Baltic Clam, Macoma Balthica, In Shallow Systems Of The Chesapeake Bay, Kristen Adams Delano

Dissertations, Theses, and Masters Projects

No abstract provided.