Results 71 to 80 of about 1,092 (209)

An Improved Backstepping-Based Controller for Three-Dimensional Trajectory Tracking of a Midwater Trawl System

, 2020
An improved backstepping control method for three-dimensional trajectory tracking of a midwater trawl system is investigated. A new mathematical model of the trawl system while considering the horizontal expansion effect of two otter boards is presented ...
Zhao Yan, Yun Sheng Mao, Cheng Gang Liu
core  

Biological characterization of a mid‐water salinity maximum intrusion over the Northeast US Shelf

Limnology and Oceanography, Volume 71, Issue 5, May 2026.
Abstract Salinity maximum intrusions, subsurface layers of anomalously salty and warm continental slope water moving onto the continental shelf along the thermocline, are recurring features over the Northeast US Shelf and represent an important cross‐shelf exchange mechanism.
Anh H. Pham, Bofu Zheng, Heidi M. Sosik, Weifeng (Gordon) Zhang, Megan Ferguson, Emily E. Peacock, E. Taylor Crockford, Benjamin Grassian, Sarah Zuidema, Glen G. Gawarkiewicz, Mei Sato   +10 more
wiley   +1 more source

Seabed classification in the Gulf of Alaska from acoustic surveys using deep learning

Limnology and Oceanography: Methods, Volume 24, Issue 5, May 2026.
Abstract High‐resolution mapping of seafloor habitats has wide applications for fisheries, conservation efforts, offshore infrastructure planning, mineral extraction, and scientific modeling. This study leverages existing widespread single‐beam acoustic data and machine learning to create habitat maps for the Gulf of Alaska at a spatial resolution of ...
Karuna Agarwal, Christopher N. Rooper, Kresimir Williams   +2 more
wiley   +1 more source

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

Fisheries Oceanography, Volume 35, Issue 3, Page 413-429, May 2026.
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

(above) Cod end of an Isaacs-Kidd midwater trawl bitten by captured Isistius brasiliensis (photo J C Staiger, University of Miami, 10 May 1972); (below) plug of fish tissue found in the stomach of an I. brasiliensis caught in Isaacs-Kidd midwater trawl (photo M J Miller, Atmosphere and Ocean Research Institute, University of Tokyo, Japan).

, 2016
(above) Cod end of an Isaacs-Kidd midwater trawl bitten by captured Isistius brasiliensis (photo J C Staiger, University of Miami, 10 May 1972); (below) plug of fish tissue found in the stomach of an I.
Peter B. Best (370105), Theoni Photopoulou (2602711)   +1 more
core   +1 more source

Lag in Effective Population Size Decline Amid Demographic Collapse: A Case Study of the Delta Smelt (Hypomesus transpacificus)

Molecular Ecology, Volume 35, Issue 10, May 2026.
ABSTRACT Effective population size (Ne), census size (Nc) and their ratio (Ne/Nc) are widely used indicators in conservation genetics, yet long‐term empirical data tracking of all three metrics over long time scales in wild populations remains rare. Using monitoring data from 1995 to 2020, we examined temporal dynamics of Ne, Nc and their relationship ...
Amanda J. Finger, Melanie E. F. LaCava, Evan W. Carson, James A. Hobbs, Tien‐Chieh Hung, Matthew L. Nobriga, Leo Polansky, Robin S. Waples   +7 more
wiley   +1 more source

Distribution pattern of macrozooplankton along the 140°E meridian in the Southern Ocean during austral summer 2002 and 2003

Antarctic Record, 2008
Field surveys were conducted along 140°E in the Southern Ocean north of Terre Adelie during three cruises: the KH cruise by RV Hakuho Maru, and TC1 and TC2 cruises by RV Tangaroa during the austral summers of 2002 and 2003.
Atsushi Tanimura, Nobukazu Oka, So Kawaguchi, Jun Nishikawa, Kunio T. Takahashi, Ryusuke Makabe, Graham Hosie, Tsuneo Odate   +7 more
doaj   +1 more source

A Study on the Catch Losses and Mesh Selectivity Related to the Attachment of Marine Mammal Bycatch Reduction Devices on Midwater Trawl Gear

Fishes
The National Institute of Fisheries Science in Korea is developing marine mammal bycatch reduction devices (BRDs) for high-risk fishing gear, such as trawls.
Jung-Mo Jung, Min-Seuk Park, Kyu-Suk Choi   +2 more
doaj   +1 more source

Dynamical analysis of the net and the otter-boards in a midwater trawl system.

NIPPON SUISAN GAKKAISHI, 1991
In order to obtain more knowledge about the control of a midwater trawl system, three electronic instruments were produced by way of traial to measure the motions of both the otter-boards and net under trawling operations with a full-scale net. These devices were used on the sampling trawl experiment.
Miura, Teisuke, Shimizu, Susumu, Nishiyama, Sakuzou   +2 more
openaire   +2 more sources

Marine Snow Dynamics in the NE Gulf of Mexico: Particle Abundance, Characteristics, and Impacts on Deepwater Horizon Oil Sedimentation

Journal of Geophysical Research: Oceans, Volume 131, Issue 3, March 2026.
Abstract The Deepwater Horizon (DWH) oil spill in the NE Gulf of Mexico in 2010 was the largest accidental spill globally. During and after the spill, oil was incorporated into marine snow (marine‐oil‐snow or MOS) and sedimented to the seafloor, accounting for ∼21% of the oil released.
Kendra L. Daly, George Jackson, Andrew Remsen, Kurt Kramer, Palak Dave, Dmitry B. Goldgof, Lawrence Hall   +6 more
wiley   +1 more source