Results 71 to 80 of about 38,397 (265)

The use of multibeam sonar mapping techniques to refine population estimates of the endangered white abalone (Haliotis sorenseni) [PDF]

, 2006
Multibeam sonar mapping techniques provide detailed benthic habitat information that can be combined with the data on species-specific habitat preferences to provide highly accurate calculations of populations in a particular area. The amount of suitable
Butler, John, Cochrane, Guy, Kvitek, Rikk, Neuman, Melissa, Pinkard, Deanna   +4 more
core  

Variations in downslope activity and bottom current dynamics in a land‐detached submarine channel system since the Last Glacial Maximum

Sedimentology, EarlyView.
ABSTRACT The Gollum Channel System is a land‐detached large‐scale canyon‐channel system situated offshore southwest Ireland on the Northeast Atlantic margin. The system has been considered inactive with downslope gravity flows since the last glacial period, but geophysical data in some of its branches do suggest Holocene activity.
Lotte Verweirder, Aggeliki Georgiopoulou, Kobus Langedock, Fred Fourie, Martin White, Sara Benetti, Fabio Sacchetti, Wieter Boone, David Van Rooij   +8 more
wiley   +1 more source

Quantifying Marine Sedimentary Carbon: A New Spatial Analysis Approach Using Seafloor Acoustics, Imagery, and Ground-Truthing Data in Scotland

Frontiers in Marine Science, 2020
Marine sediments are important repositories of organic matter, effectively burying organic carbon (OC) over geological timescales thus providing a climate regulation service.
Corallie Hunt, Urška Demšar, Dayton Dove, Craig Smeaton, Rhys Cooper, William E. N. Austin, William E. N. Austin   +6 more
doaj   +1 more source

Assessing Bottom Gear Impact in the WGOM Closure Area: A Multifaceted Approach [PDF]

, 2007
Mashkoor Malik presented the results of a UNH Center for Coastal and Ocean Mapping (CCOM) study of the seafloor of the WGOMCA. Objectives The objectives for the CCOM study were to: • Construct a bathymetric map of Jeffrey’s Ledge to serve as a framework ...
Malik, Mashkoor A., Mayer, Larry A.
core   +1 more source

Ultrastructure of astrocytes using volume electron microscopy: A scoping review

The Journal of Physiology, EarlyView.
Abstract figure legend A complete overview on astrocyte ultrastructure with volume electron microscopy. The morphology of astrocytes under physiological and pathological conditions plays a role in brain homeostasis, synaptic activity and structural support, but their morphological complexity and heterogeneity are still poorly quantified.
Vanessa Chiappini, Maria Fernanda Veloz Castillo, Francesco Biancardi, Ferdinando Di Cunto, Pierre J. Magistretti, Alessandro Vercelli, Marco Agus, Corrado Calì   +7 more
wiley   +1 more source

Evaluating the Risk of Collision of Seals Swimming Within Metres of Operating Tidal Turbines

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT We used imaging sonar to continuously monitor wildlife at an operational tidal turbine in the Pentland Firth, Scotland, between May 2022 and June 2023. Of 704 detected seal tracks, 347 occurred during turbine operation and 122 of these were detected directly upstream of the rotating blades in the horizontal plane.
Jessica Montabaranom, Douglas Gillespie, Carol Sparling, Emma Longden, Gordon Hastie   +4 more
wiley   +1 more source

Analysis of three selected automated multibeam bathymetric filters in BeamWorX AutoClean Software

Nova Geodesia
The increasing volume of bathymetric data acquisition, driven by citizen science initiatives and advancements in hydrographic survey technologies, particularly multibeam and LiDAR sensors, necessitates automated data-cleaning procedures.
Daniel Devote BASIL
doaj   +1 more source

Advanced Mid-Water Tools for 4D Marine Data Fusion and Visualization [PDF]

, 2009
Mapping and charting of the seafloor underwent a revolution approximately 20 years ago with the introduction of multibeam sonars -- sonars that provided complete, high-resolution coverage of the seafloor rather than sparse measurements. The initial focus
Arsenault, Roland J., Doucet, Maurice, Gee, Lindsay, Malik, Mashkoor A., Mayer, Larry A., Ware, Colin, Weber, Thomas C.   +6 more
core   +1 more source

Seafloor Segmentation Based on Bathymetric Measurements from Multibeam Echosounders Data [PDF]

, 2003
Bathymetric data depicts the geomorphology of the seabottom and allows characterization of spatial distributions of apparent benthic habitats. The variability of seafloor topography can be defined as a texture.
Cutter, Randy G, Jr., Mayer, Larry A., Rzhanov, Yuri   +2 more
core   +2 more sources

Scour hole behaviour: A field study of the Dutch Rhine Delta

Earth Surface Processes and Landforms, Volume 51, Issue 2, February 2026.
Scour hole behaviour can be divided into dynamic and stable. Dynamic scour holes grow in area, depth and volume during seasonal discharge variations and are typically located in discharge‐dominated river reaches. Stable scour holes are found in tidal rivers with heterogeneous riverbeds and show nearly fixed dimensions.
Marthe Oldenhof, Jord J. Warmink, Koen Blanckaert, Suzanne J. M. H. Hulscher   +3 more
wiley   +1 more source