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Articles 1 - 24 of 24
Full-Text Articles in Life Sciences
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
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 …
A Framework For Implementing Bioinformatics Knowledge-Exploration Systems, John A. Hayes
A Framework For Implementing Bioinformatics Knowledge-Exploration Systems, John A. Hayes
Dissertations, Theses, and Masters Projects
No abstract provided.
Energetically Costly Mate Sampling And Female Zebra Finch Choice, Timothy Ryan Crabtree
Energetically Costly Mate Sampling And Female Zebra Finch Choice, Timothy Ryan Crabtree
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
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.
The Influence Of Salinity On Diet Composition, Provisioning Patterns, And Nestling Growth In Bald Eagles In The Lower Chesapeake Bay, Ann Catherine Markham
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.
Natural Dermo Resistance And Related Defense Mechanisms In Eastern Oysters, Crassostrea Virginica, With Implications For Restoration, Shawn Michael Stickler
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 …
Investigation Of Relationships Between Short-Term Photosynthetic Performance And Long-Term Growth Of Zostera Marina, Elizabeth Amy Lewis
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.
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
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.
Dynamics Of The Host-Parasite Interaction: In Vitro Correlates Of Crassostrea-Induced Modulation Of Perkinsus Marinus Function, Christopher G. Earnhart
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 …
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
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 varied …
Evaluating Restored Oyster Reefs In Chesapeake Bay: How Habitat Structure Influences Ecological Function, Janet A. Nestlerode
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 …
Sperm-Oocyte Membrane Interactions During Fertilization In The Nematode Caenorhabditis Elegans, Alissa Gale Richmond
Sperm-Oocyte Membrane Interactions During Fertilization In The Nematode Caenorhabditis Elegans, Alissa Gale Richmond
Dissertations, Theses, and Masters Projects
No abstract provided.
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
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.
Do Sulfide-Oxidizing Bacteria Produce Light?, Rachel Elizabeth Ann Horak
Do Sulfide-Oxidizing Bacteria Produce Light?, Rachel Elizabeth Ann Horak
Dissertations, Theses, and Masters Projects
No abstract provided.
Plumage As A Habitat For Bacilli, Justine M. Whitaker
Plumage As A Habitat For Bacilli, Justine M. Whitaker
Dissertations, Theses, and Masters Projects
No abstract provided.
Vegetation Dynamics Of A Tidal Freshwater Marsh: Long-Term And Inter-Annual Variability And Their Relationship To Salinity, Sarah B. Davies
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.
Spatial Variations In Benthic Invertebrate Assemblages In And Around The Georges Banks Closed Areas, Andrew Clayton Walker
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.
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
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 general …
Reproductive Biology Of American Shad, Alosa Sapidissima, In The Mattaponi River, Aaron Reid Hyle
Reproductive Biology Of American Shad, Alosa Sapidissima, In The Mattaponi River, Aaron Reid Hyle
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Overexpressing Alternative Isoform Pax-5e In Vivo, Suzanne Elizabeth Cole
Effects Of Overexpressing Alternative Isoform Pax-5e In Vivo, Suzanne Elizabeth Cole
Dissertations, Theses, and Masters Projects
No abstract provided.
Bird Conservation Value Of Golf Courses, Joshua Elliott Leclerc
Bird Conservation Value Of Golf Courses, Joshua Elliott Leclerc
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
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.
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
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.