Download or read book Investigations of the Immune System of the Blue Crab Callinectes Sapidus written by Timothy W. Waters and published by . This book was released on 1990 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Histology of the Blue Crab Callinectes Sapidus written by Phyllis Truth Johnson and published by Greenwood. This book was released on 1980 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Life History of the Blue Crab Callinectes Sapidus written by William Perry Hay and published by . This book was released on 1905 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Blue Crab Callinectes Sapidus written by and published by . This book was released on 1971 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synopsis of Biological Data on the Blue Crab Callinectes Sapidus Rathbun written by Mark R. Millikin and published by . This book was released on 1984 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annotated Bibliography on the Fishing Industry and Biology of the Blue Crab Callinectes Sapidus written by Marlin E. Tagatz and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigating the Roles of Cuticular Proteins of the Blue Crab Callinectes Sapidus Using RNA Interference written by Julia Jenkins and published by . This book was released on 2010 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Blue Crab written by Victor S. Kennedy and published by Maryland Sea Grant College University of Maryland. This book was released on 2007 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Blue Crab Callinectes Sapidus Fishery as a Potential Source of Mortality for Bottlenose Dolphins Tursiops Truncatus in South Carolina written by Leslie G. Burdett and published by . This book was released on 2003 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shell Disease in Blue Crabs Callinectes Sapidus from the Albemarle Pamlico Estuary written by Edward J. Noga and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of the Bacterial Properties that Impair Respiration in the Atlantic Blue Crab Callinectes Sapidus written by Nathaniel Garver Johnson and published by . This book was released on 2011 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the blue crab Callinectes sapidus, injection with the bacterial pathogen Vibrio campbellii causes a decrease in oxygen consumption. The physical obstruction of hemolymph flow through the gill vasculature, caused by aggregations of bacteria and hemocytes, appears to underlie the decrease in aerobic function associated with bacterial infection. We sought to elucidate the bacterial properties sufficient to induce a decrease in circulating hemocytes, reflecting hemocyte aggregation and decreased respiration. Lipopolysaccharide (LPS), the primary component of the gram-negative bacterial cell wall, is known to interact with crustacean hemocytes. Purified LPS was covalently bound to the surfaces of polystyrene beads, resembling bacteria in size. Injection of these "LPS beads" caused a decrease in circulating hemocytes comparable to that seen with V. campbellii injection, while beads alone failed to do so. These data suggest that in general, gram-negative bacteria could stimulate hemocyte aggregation. To test this hypothesis, the effects of different bacterial species on total hemocyte counts were assessed. Six of the seven gram-negative species tested caused decreases in circulating hemocytes, suggesting an important role for LPS in the induction of this response. However, LPS is not necessary to provoke the immune response, as a gram-positive bacterium, which lacks LPS, caused a decrease in circulating hemocytes. These results imply that a broad range of naturally-occurring bacteria could impair respiration in C. sapidus. To further verify the relationship between reduced circulating hemocyte counts and impaired respiration, we sought to evaluate the effects of selected treatments on oxygen uptake. In contrast to previous reports, injection of V. campbellii did not lead to a decrease in oxygen uptake. Interestingly, ventilatory pauses were observed following bacterial injection in crabs that had been starved for 72 h, but not 2 or 24 h. These results indicate that the immune response against bacteria can affect respiratory physiology and aerobic metabolism in ways that are more complicated than previously assumed.
Download or read book Studies on the blue crab Callinectes sapidus in Georgia written by Bobby A. Palmer and published by . This book was released on 1974 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Respiration and Energy Metabolism During Exercise in Callinectes Sapidus the Atlantic Blue Crab written by Lindy Kay Thibodeaux and published by . This book was released on 2008 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic blue crab, Callinectes sapidus, lives in estuarine and coastal environments where exposure to disease-causing microorganisms occurs. Bacteria from the genus Vibrio are naturally abundant in marine environments and are commonly associated with the exoskeleton and within the hemolymph of blue crabs and have the potential to cause mortality in these organisms. First, the impact of the marine bacterium Vibrio campbellii on survival of blue crabs was assessed. Three replicate trials of an LD50 bacterial challenge assay were performed. We determined that V. campbellii can cause mortality in blue crabs with an average 48 h LD50 value of 6.2 x 105 CFU g−1 crab. Secondly, the effect of bacterial exposure on metabolism was determined following injection of V. campbellii or saline (control). Injection of V. campbellii caused a 30% reduction in resting oxygen uptake 4 h after injection, which decreased further to 42% at 24 h, accompanied only by a small increase in circulating hemolymph lactate. These data support the hypothesis that hemocyte aggregates forming around bacteria in the gills interfere with normal respiratory and circulatory function of the gills. Since blue crabs depend on the ability to effectively move around in their environment to survive, we also investigated how exposure to bacteria affects the energetic costs of 30 min of walking at 8 m min−1. Blue crabs more than doubled their aerobic and anaerobic metabolism in response to moderate walking in well-oxygenated conditions. However, exposure to V. campbellii caused a significant depression in aerobic metabolism during and after walking supplemented only by a small increase in anaerobic metabolism. Patterns of phosphagen and adenylate consumption within an active muscle were not affected. The ability of blue crabs to supply the necessary energy requirements of walking is remarkably and largely unaffected by treatment with Vibrio; however, Vibrio-injected crabs are less aerobic while doing so. This depressed metabolic condition in response to bacteria, present even during moderate activity, could be caused by a gill blockage by hemocyte aggregations in response to bacteria or may represent an internally regulated depression of metabolism.
Download or read book Studies on Osmotic and Ionic Regulation in the Blue Crab Callinectes Sapidus Rathbun written by Eng-chow Tan and published by . This book was released on 1962 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Population Genetic Structure and Natural Selection in the Blue Crab Callinectes Sapidus Using Nuclear Gene Sequences written by Bree K. Yednock and published by . This book was released on 2013 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shell Disease of Blue Crabs Callinectes Sapidus in the Pamlico River North Carolina written by Sean A. McKenna and published by . This book was released on 1990 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
