Results 61 to 70 of about 1,481 (178)

Exploring Mesophotic Coral Reef Boundaries Using Environmental DNA Metabarcoding

Environmental DNA, Volume 8, Issue 4, July‐August 2026.
Environmental DNA (eDNA) metabarcoding reveals boundaries along depth gradients in shallow and mesophotic coral reefs. Analysis of metazoan amplicon sequence variants (ASVs) uncovers changes in community structure from shallow to deep reefs, highlighting a localized eDNA footprint and its potential for monitoring mesophotic and deep‐sea habitats ...
Aran Sofer, Omri Bronstein
wiley   +1 more source

River Ice Analyses and Roughness Calculations Using Underwater Drones and Photogrammetric Approach

Hydrological Processes, Volume 40, Issue 7, July 2026.
This study presents a methodology for determining hydraulic roughness (Manning's n) of fluvial ice using underwater drone and Structure from Motion (SfM) photogrammetry. The findings show that cost‐efficient equipment can be used to determine Manning's n for river ice, which supports modelling efforts, especially under intense warming in northern areas.
Reeta Vaahtera, Juha‐Matti Välimäki, Tuure Takala, Eliisa Lotsari   +3 more
wiley   +1 more source

Development of Water-Surface Robotic Vehicle to Assist Communication Between Remotely Operated Vehicle Underwater Robot and Control Station

JAREE (Journal on Advanced Research in Electrical Engineering), 2017
This paper developed a water-surface robotic vehicle that act as repeater station to assist the communication between ROV (Remotely Operated Vehicle) underwater robot and control station.
Ronny Mardiyanto, Badrut Tamam
doaj  

Multi-Objective Nonlinear Model Predictive Control for Tethered USV-ROV Cooperative Tracking and Dynamic Obstacle Avoidance

Journal of Marine Science and Engineering
Tethered unmanned surface vehicle (USV) and remotely operated vehicle (ROV) systems are widely used in deep-sea inspection, observation, and intervention tasks.
Guochang Zhang, Qinglong Zhao, Sen Cheng, Qianhui Dong, Shuochen Han, Haitao Zhu, Yanyan Wang   +6 more
doaj   +1 more source

Tracing methane sources in shallow waters of the North Sea: Biogenic signatures and hydrocarbon transport near abandoned wells

Limnology and Oceanography, Volume 71, Issue 7, July 2026.
Abstract Numerous abandoned wells in the North Sea may provide gas, particularly methane (CH4), migration pathways by penetrating shallow, biogenic gas accumulations. However, related sampling campaigns have been largely contradictory and lack a substantial database. Research cruise MSM98 targeted the abandoned wells B18‐1, DOK 1‐X, B11‐2, THOR and D‐1
Katja U. Heeschen, Stefan Schloemer, Robert Kopte, Miriam Römer, Martin Blumenberg   +4 more
wiley   +1 more source

Amathillopsidae (Crustacea: Amphipoda) from New Zealand, including the description of a new species

Records of the Australian Museum, 2023
Amathillopis lowry, a new species of the family Amathillopsidae is described from the south west Pacific. In situ images show this amphipod species new to science clinging to a stalked sponge in 4600-metre depth.
Anne-Nina Lörz, Rachael A. Peart
doaj   +1 more source

Tectonic Controls on Volcanism and Associated Hydrothermal Activity in a Sediment‐Dominated Mid‐Ocean Ridge; Escanaba Trough

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Mid‐ocean ridges, the Earth's most extensive volcanic system, exhibit unique characteristics in sediment‐dominant environments. Thick sediment cover insulates the crust and channels fluid along pathways that can lead to the formation of distinct crustal alteration patterns, exceptionally large mineral deposits, and specialized chemosynthetic ...
Christopher Galley, John Jamieson, Amy Gartman, Isobel Yeo, Masako Tominaga, Maurice Tivey, Carlos Braga, Laura Moore, Sharon L. Walker   +8 more
wiley   +1 more source

Operational Improvement of Hemire ROV for Deep-sea Survey and Application to Exploration of Ferromanganese Crusts of Western Pacific Seamount

한국해양공학회지, 2018
This paper presents the results of an exploration of the ferromanganese crusts of Western Pacific Seamount registered by the Korean government. This area has been surveyed with a deep-sea camera and crust samples have been acquired by deep-sea dredging ...
Hyuk Baek, Jin-Yeong Park, Hyungwon Shim, Bong-Huan Jun, Pan-Mook Lee   +4 more
doaj   +1 more source

Notes on a remotely operated vehicle survey to describe reef ichthyofauna and habitats – Agulhas Bank, South Africa

Bothalia: African Biodiversity & Conservation, 2016
Background: Despite their ecological and economic importance, reef habitats on the central Agulhas Bank, off the southern tip of Africa, remain poorly studied. The ichthyofauna of these habitats cannot be surveyed using trawl gear. Objective: Preliminary
Mapula S. Makwela, Sven E. Kerwath, Albrecht Götz, Kerry Sink, Toufiek Samaai, Christopher G Wilke   +5 more
doaj   +1 more source

Implementation of vision based 2-DOF underwater Manipulator

MATEC Web of Conferences, 2015
Manipulator is of vital importance to the remotely operated vehicle (ROV), especially when it works in the nuclear reactor pool. Two degrees of freedom (2-DOF) underwater manipulator is designed to the ROV, which is composed of control cabinet, buoyancy ...
Geng Jinpeng, Chou Wusheng, Dong Mingjie
doaj   +1 more source