Faculty Scholarly Works
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Item 40th reunion of Battle of Peleliu, Palau islands. February 1984(2011-08-12T18:46:15Z) Ray, Sammy MItem Artificial oyster substrate: coal ash pellets(2011-08-03T13:37:30Z) Ray, Sammy MCoal ash is a waste product of coal-fired power generation. A potential good use for the ash is as a substrate for growing oysters. Dr. Ray demonstrates his experiments with this substrate.Item Australian oyster industry(2004-02) Ray, Sammy MItem Beach core: West End Sargassum Project(Texas A&M University at Galveston. Center for Texas Beaches and Shores, 2006-02) --These are core logs from samples taken on the beaches of Galveston Island in February of 2006.Item Beach Monitoring and Storm Analysis on Treasure Island, Galveston Island and Bolivar Peninsula – CMP Cycle 9 Final Report(2006) Dellapenna, Timothy M.; Webster, Robert; Noll, Christian IV; Fielder, BryanIn an ongoing effort to investigate coastal elevation changes as it relates to mean sea level along the upper Texas coastline, 34 survey profiles were completed in 2006 perpendicular to the shoreline beginning at Rollover Pass, Texas and ending at the jetties at Surfside, Texas. The surveys were completed to record accurate transect elevations from the dune line past the depth of closure. Permanent and temporary benchmarks were selected with emphasis on accuracy, repeatability and efficiency.Item Beach Pocket Park beach profile 2007-2008(2008) Texas A&M University at Galveston Coastal Geology LaboratoryItem Beach Pocket Park beach profile 2007-2008. Miscellaneous files(2008) Texas A&M University at Galveston Coastal Geology LaboratoryItem Beach profiles(Texas A&M University at Galveston Coastal Geology Laboratory, 2007) --Item Benthic biomass in the Pisco, Peru upwelling(1971-02) Rowe, Gilbert T.Quantitative benthic samples were taken off Peru in and adjacent to the Pisco upwelling in an attempt to assess the effects of extremes in productivity and dissolved oxygen on the distribution of biomass (organic cabon). The macrofauna was combused to organic carbon (less the carbonate fraction) to allow direct comparisons with the production of organic carbon at the surface and its distribution in the water column and sediments. Similar techniques were employed in the Gulf of Mexico previously (Rowe and Menzel, 1970), and it is hoped comparisons of the two sets of data contrasting regions of low and high proudctivity will give some insights into the nature of the movement of organic energy from its source through the water column to the bottom.Item Benthic production and processes off Baja California, Northwest Africa and Peru: a classification of benthic subsystems in upwelling ecosystems(Instituto de Investigaciones Pesqueras., 1985) Rowe, Gilbert T.Estimates of the standing stocks, secondary production and metabolism of the benthos have been compared in the coastal upwelling ecosystems off northwest Africa, Baja California, and southern Peru. Northwest Africa is characterized by shelf break upwelling and as a result standing stocks, macrobenthic production and sediment organic matter are highest out at the shelf-slope boundary. Sediment microbial activity and biomass on the other hand are highest nearshore in the dynamic zone where aeolian silt and sand are being blown into the sea from the Sahara Desert. Baja California is dominatd by the red crab Pleuroncodes planipes, having high rates of growth and metabolic utilization of organic matter, both on bottom and in the water. Peru benthos and metabolism are very different from the above areas because of the low oxygen concentrations in the bottom water. Organic matter is far higher in the sediment and heterotrophic metabolism is principally anaerobic rather than aerobic. A normal offshore benthic fauna is replaced by a mat of sulfur bacteria with unknown production and metabolic rates. Benthic subsystems in upwelling ecosystems can be placed in two categories: those overloaded with organic matter, depleted of oxygen and dominated by sulfate reduction and those that are are not overloaded and remain aerobic. Peru and southwest Africa typify overloaded systems whereas NW Africa and Baja California are examples of aerobic systems. Although benthic metabolism and inorganic nutrient regeneration are high in both types of subsystems, all upwelling ecosystems, with their dynamic open boundaries, export organic particulate matter and import inorganic nutrients at rates that are far in excess of that consumed or produced by benthic metabolism.Item Bermuda beach profile 2007-2008(2008) Texas A&M University at Galveston Coastal Geology LaboratoryItem Bermuda beach profile 2007-2008. Miscellaneous files(2008) Texas A&M University at Galveston Coastal Geology LaboratoryItem Bolivar beach profile 2006(Texas A&M University at Galveston Coastal Geology Laboratory, 2006)Item Bolivar beach profile 2006. Raw data(Texas A&M University at Galveston Coastal Geology Laboratory, 2006)Item Bolivar Sabine beach profile 2002(Texas A&M University at Galveston Coastal Geology Laboratory, 2002)Item Bolivar Sabine beach profile 2002. Sand sample. Data files(Texas A&M University at Galveston Coastal Geology Laboratory, 2002)Item Bolivar Sabine beach profile 2002. Sand sample. Grain size distribution graphs, set 1(Texas A&M University at Galveston Coastal Geology Laboratory, 2002)Item Bolivar Sabine beach profile 2002. Sand sample. Grain size distribution graphs, set 2(Texas A&M University at Galveston Coastal Geology Laboratory, 2002)Item Comparative analysis of the flexural stiffness of pinniped vibrissae(PLOS ONE, 2015-05)Vibrissae are important components of the mammalian tactile sensory system and are used to detect vibrotactile stimuli in the environment. Pinnipeds have the largest and most highly innervated vibrissae among mammals, and the hair shafts function as a biomechanical filter spanning the environmental stimuli and the neural mechanoreceptors deep in the follicle-sinus complex. Therefore, the material properties of these structures are critical in transferring vibrotactile information to the peripheral nervous system. Vibrissae were tested as cantilever beams and their flexural stiffness (EI) was measured to test the hypotheses that the shape of beaded vibrissae reduces EI and that vibrissae are anisotropic. EI was measured at two locations on each vibrissa, 25% and 50% of the overall length, and at two orientations to the point force. EI differed in orientations that were normal to each other, indicating a functional anisotropy. Since vibrissae taper from base to tip, the second moment of area (I) was lower at 50% than 25% of total length. The anterior orientation exhibited greater EI values at both locations compared to the dorsal orientation for all species. Smooth vibrissae were generally stiffer than beaded vibrissae. The profiles of beaded vibrissae are known to decrease the amplitude of vibrations when protruded into a flow field. The lower EI values of beaded vibrissae, along with the reduced vibrations, may function to enhance the sensitivity of mechanoreceptors to detection of small changes in flow from swimming prey by increasing the signal to noise ratio. This study builds upon previous morphological and hydrodynamic analyses of vibrissae and is the first comparative study of the mechanical properties of pinniped vibrissae.Item Comparative Analysis of the Flexural Stiffness of Pinniped Vibrissae(PLOS ONE, 2015-07-06) Ginter Summarell, Carly; Ingole, Sudeep; Fish, Frank; Marshall, ChristopherVibrissae are important components of the mammalian tactile sensory system and are used to detect vibrotactile stimuli in the environment. Pinnipeds have the largest and most highly innervated vibrissae among mammals, and the hair shafts function as a biomechanical filter spanning the environmental stimuli and the neural mechanoreceptors deep in the follicle-sinus complex. Therefore, the material properties of these structures are critical in transferring vibrotactile information to the peripheral nervous system. Vibrissae were tested as cantilever beams and their flexural stiffness (EI) was measured to test the hypotheses that the shape of beaded vibrissae reduces EI and that vibrissae are anisotropic. EI was measured at two locations on each vibrissa, 25% and 50% of the overall length, and at two orientations to the point force. EI differed in orientations that were normal to each other, indicating a functional anisotropy. Since vibrissae taper from base to tip, the second moment of area (I) was lower at 50% than 25% of total length. The anterior orientation exhibited greater EI values at both locations compared to the dorsal orientation for all species. Smooth vibrissae were generally stiffer than beaded vibrissae. The profiles of beaded vibrissae are known to decrease the amplitude of vibrations when protruded into a flow field. The lower EI values of beaded vibrissae, along with the reduced vibrations, may function to enhance the sensitivity of mechanoreceptors to detection of small changes in flow from swimming prey by increasing the signal to noise ratio. This study builds upon previous morphological and hydrodynamic analyses of vibrissae and is the first comparative study of the mechanical properties of pinniped vibrissae.