- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 281 to 290 of 395 (0.045 seconds)Spelling suggestions: "subject:"fresh water 2studies"" "subject:"fresh water 3studies""
| 281 |
The Biology of the Sandbar Shark Carcharhinus plumbeus (Nardo, 1827) in the Lower Chesapeake Bay and Adjacent WatersLawler, Edward Fenton 01 January 1976 (has links) (PDF)
No description available.
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| 282 |
Primary Production and Temporal Variation in the Macrophytic Community of a Tidal Freshwater SwampFowler, Bryan Keith 01 January 1987 (has links) (PDF)
No description available.
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| 283 |
An Assessment of Tributyltin Contamination in Sediments and Shellfish in the Chesapeake BayEspourteille, Francois A. 01 January 1988 (has links) (PDF)
No description available.
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| 284 |
Osmotic Tolerance and Volume Regulation in Cultured Cells of the Oyster Pathogen Perkinsus marinusO'Farrell, Caroline L. 01 January 1995 (has links) (PDF)
No description available.
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| 285 |
Temporal and Spatial Variation in Reproductive Output of the Veined Rapa Whelk (Rapana venosa) in the Chesapeake BayWare, Catherine C. 01 January 2002 (has links) (PDF)
No description available.
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| 286 |
Metapopulation Dynamics, Habitat Quality, and Spatial Scale: Variation in Reproductive Output of the Baltic Clam, Macoma balthica, in Shallow Systems of the Chesapeake BayDelano, Kristen Adams 01 January 2004 (has links) (PDF)
No description available.
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| 287 |
Twine-Top Modifications of Sea-Scallop Dredges: Reducing Yellowtail-Flounder BycatchMilleville, Kelli A. 01 January 2008 (has links) (PDF)
No description available.
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| 288 |
An Evaluation of a Reduced Bar Spacing Turtle Excluder Device in the U.S Gulf of Mexico offshore Shrimp Trawl FisheryNalovic, Michel Anthony 01 January 2014 (has links) (PDF)
Shrimp are the most economically valuable internationally-traded seafood commodity, and wild-caught, trawled shrimp make up almost half of the ~6.6 million metric tons of annual global production. Shrimp trawling is responsible for one-third of the world’s total fisheries bycatch, leading many to consider shrimp trawling to be the single most destructive fishing practice in the world. Though the bycatch of large marine animals can be significantly reduced by use of turtle excluder devices (TEDs) on shrimp trawls, current TED designs are ineffective at reducing the capture of smaller organisms which represent a large portion of the total bycatch. To further reduce bycatch in the United States Gulf of Mexico shrimp trawl fleet, a variety of bycatch reduction devices (BRDs) are currently being used in conjunction with TEDs. I evaluated the efficiency of a new TED design, intended to reduce bycatch and maintain target shrimp catch. The new TED model is characterized by 5-cm spacing between flat bars, as opposed to the current industry standard of 10-cm spacing between round bars. Comparative towing experiments under standard commercial shrimp trawling operations in waters off of Georgia, Texas and Mississippi during the summer of 2012 demonstrated shrimp losses or gains of -4.32%, +6.07%, -1.58% respectively and an overall reduction in the capture weight of sharks (41.1-99.9%), rays and skates (76.5-93.4%) and horseshoe crabs (100%). These experiments were limited in time and space, and therefore not fully representative of fishing conditions throughout the year, but this study demonstrates the new TED’s effect on the catch rates of target shrimp and bycatch. This thesis research should lead to a broader understanding of the benefits of using reduced spacing flat bar TEDs in the U.S. shrimp trawl industry.
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| 289 |
Functional and Molecular Analysis of Antibody Affinity Maturation in Rainbow Trout (Oncorhynchus mykiss)Zhang, Haili 01 January 1999 (has links) (PDF)
No description available.
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| 290 |
Carbon cycling in the York River Estuary: an isotopic and mass balance approach using natural Carbon-14 and Carbon-18 isotopesLinebaugh, Donald W. 01 January 1999 (has links)
No description available.
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