Results 131 to 140 of about 56,657 (315)

Capelin Size, Condition, and Abundance Through Multiple Heatwaves in Alaska

Fisheries Oceanography, EarlyView.
ABSTRACT Capelin (Mallotus spp.) are pelagic forage fishes that can be especially abundant in sub‐arctic marine ecosystems and are important prey for upper trophic‐level consumers. Abundance and distribution of capelin have been linked to ocean temperature, but the magnitude and directionality of thermal sensitivity can vary regionally.
Robert M. Suryan, Jacek Maselko, Emily A. Fergusson, Fletcher Sewall, Johanna J. Vollenweider, Alexander G. Andrews III, James M. Murphy, Ellen M. Yasumiishi   +7 more
wiley   +1 more source

An R-based integrated method for producing river bathymetry and cross-sections from recreational-grade sonar sensor data

MethodsX
Water bodies’ bathymetry is a crucial information for understanding and sustainably managing water resources. Bathymetric surveys can be expensive due to sonar equipment cost, but low-cost alternatives options exist.
M. Redana, E. Carrero-Carralero
doaj   +1 more source

The International Bathymetric Chart of the Arctic Ocean (IBCAO): An Improved Morphological Framework for Oceanographic Investigations [PDF]

, 2003
The IBCAO initiative set out in late 1997 to assemble and merge all available bathymetric observations from northern regions, with the intent of constructing a reliable and up-to-date portrayal of the Arctic seabed in digital and printed form.
Jakobsson, Martin, Macnab, Ron
core   +1 more source

Compound‐Specific Stable Isotope Analysis Reveals Population‐Specific Differences in Chinook Salmon Trophic Level and Basal Resource Use in the Northeast Pacific

Fisheries Oceanography, EarlyView.
ABSTRACT Chinook salmon exhibit far‐flung and disparate population‐specific marine migrations that have made it difficult to assess their trophic ecology. In this study, we collected returning and resident subadult Fraser River Chinook salmon in 2018 and 2019 from population groups with different known run‐timings (spring, summer, and fall) and marine ...
Jacob E. Lerner, Brian P. V. Hunt
wiley   +1 more source

A procedure for developing an acceptance test for airborne bathymetric lidar data application to NOAA charts in shallow waters [PDF]

, 2013
National Oceanic and Atmospheric Administration (NOAA) hydrographic data is typically acquired using sonar systems, with a small percent acquired via airborne lidar bathymetry for near‐shore areas.
Aslaksen, Michael, Ferguson, Jeffrey, Imahori, Gretchen, Jeong, Inseong, Parrish, Christopher, Pe\u27eri, Shachak, Scharff, Dave, Sellars, Jon, White, Stephen A, Wozumi, Toshi   +9 more
core   +1 more source

Mapping Escolar (Lepidocybium flavobrunneum) in Motion: Oceanographic Forces Shaping Its Habitat in the Southwestern South Atlantic, With Insights From Fishers' Perceptions

Fisheries Oceanography, EarlyView.
ABSTRACT Lepidocybium flavobrunneum [Smith, 1843], commonly known as escolar, is a large pelagic species, important for global and local fisheries, particularly in the southwestern South Atlantic Ocean (SWAO), where it constitutes a significant portion of the catch.
Lucas Rodrigues, Maria Grazia Pennino, Paul Gerhard Kinas, David Conesa, Alba Fuster‐Alonso, Andrés Domingo, Rodrigo Forselledo, Federico Mas, Bruno Mourato, Rodrigo Sant'Ana, Vinni Santos Thykjaer, Raquel Virginia Marquez Marquez, Abner Ventura Alves, Mariano Cabanillas‐Torpoco, Rafael Schroeder, Luis Gustavo Cardoso   +15 more
wiley   +1 more source

Marine Benthic Habitat Mapping of Muir Inlet, Glacier Bay National Park and Preserve, Alaska With an Evaluation of the Coastal and Marine Ecological Classification Standard III [PDF]

, 2010
Seafloor geology and potential benthic habitats were mapped in Muir Inlet, Glacier Bay National Park and Preserve, Alaska, using multibeam sonar, ground-truth information, and geological interpretations. Muir Inlet is a recently deglaciated fjord that is
Cochrane, Guy R, Etherington, Lisa, Mayer, Larry A., Mitchell, Luke D, Powell, Ross D   +4 more
core   +2 more sources

Environmental Drivers of Jumbo Squid During Fishery Collapse in the Gulf of California (2019–2024)

Fisheries Oceanography, EarlyView.
ABSTRACT The jumbo squid (Dosidicus gigas) is a cephalopod endemic to the eastern Pacific with significant ecological and economic importance. Its exploitation in the Gulf of California (GC) peaked in the 1990s, with catches exceeding 100,000 tons, but collapsed in 2009 and virtually disappeared by 2015, largely due to environmental changes and ...
Mario Vásquez‐Ortiz, Juan Roberto F. Vallarta‐Zárate, Jesús E. Osuna‐Soto, Emma Verónica Pérez‐Flores, Leslie Altamirano‐López, Ramón Isaac Rojas‐González   +5 more
wiley   +1 more source

Geomorphometric maps of Australia’s Marine Park estate and their role in improving the integrated monitoring and management of marine ecosystems

Frontiers in Marine Science
The loss of marine biodiversity is a major global issue that needs to be prioritised. In Australia, a considerable proportion (48%) of its Exclusive Economic Zone is dedicated to marine protected areas.
Vanessa Lucieer, Emma Flukes, Jacquomo Monk, Peter Walsh   +3 more
doaj   +1 more source

Bathymetric mapping with QuickBird data

, 2005
Two algorithms are used to determine bathymetry in the littoral region using QuickBird multispectral satellite observations. The algorithms determine water-leaving radiance and convert this to water depth values. The first algorithm uses a ratio of two wavebands and the second uses the sum of several wavebands.
openaire   +1 more source