Results 131 to 140 of about 4,731 (309)

Disrupting the herd: Recreational boating alters group dispersion within beluga whale herds

The Journal of Wildlife Management, EarlyView.
Recreational boating in beluga habitat remains poorly documented. Using land‐based observations in the Saguenay Fjord (Quebec, Canada), we show that increasing recreational boat numbers are associated with a higher probability of changes in beluga herd dispersion, suggesting behavioral disturbance and the need to integrate recreational boating into ...
Camille Kowalski, Angélique Dupuch, Jean‐François Sénécal, Jérôme Dupras, Clément Chion   +4 more
wiley   +1 more source

Unterwasser-Schallabstrahlung von ebenen Oberflächen mit einer aktiven Beschichtung

Sources for underwater sound with large dimensions l, such as a coating on a boat structure, can be suitable for generating low-frequency underwater sound. In this context, low-frequency refers to wavelength λ in water that fall within the range of 40 l>
Sachau, Delf, Hostombe, Kevin
core   +1 more source

Individual movement modeling expands the power of migratory species observations: North Atlantic right whale case study

Limnology and Oceanography: Methods, EarlyView.
Abstract Understanding a population's distribution depends on observing the presence and movement of individuals throughout their range. For highly mobile marine species, these observations typically rely on high effort monitoring programs. Tracking enough individuals to understand trends in movement behavior is not always logistically feasible, and ...
Abigail M. Kreuser, Daniel E. Pendleton, Nicholas R. Record, Erin L. Meyer‐Gutbrod   +3 more
wiley   +1 more source

Combining the Underwater Vision Profiler 6 with sediment traps to measure in situ velocity of marine particles

Limnology and Oceanography: Methods, EarlyView.
Abstract Particles sinking from the surface to the deep ocean play a key role in the biological carbon pump, whose efficiency depends partly on sinking velocities. Over the last decade, in situ imaging has enabled critical advances in our understanding of particle dynamics in the ocean.
Manon Laget, Alexandre Accardo, Marc Picheral, Camille Catalano, Lionel Guidi, Tristan Biard   +5 more
wiley   +1 more source

Uncertainty assessment for a novel optically shallow water radiometric acquisition platform

Limnology and Oceanography: Methods, EarlyView.
Abstract We present a novel motorized platform, a custom‐built jet‐ski designed for acoustic and radiometric measurements in optically shallow coastal waters. This platform integrates in‐water radiometers with single‐beam and multi‐beam acoustic sensors, along with a suite of active and passive instruments (conductivity‐temperature‐depth, fluorescence,
Raphaël Mabit, Simon Bélanger, Pascal Bernatchez   +2 more
wiley   +1 more source

A novel approach for in situ benthic habitat characterization

Limnology and Oceanography: Methods, EarlyView.
Abstract Habitat heterogeneity is a key driver of temporal and spatial variability of subtidal marine benthic biodiversity. However, this makes it a challenging environment in which to measure and quantify the factors driving biodiversity in a consistent manner.
Ryan J. W. Mathews, David K. A. Barnes, Simon A. Morley, Gareth Flint, Lloyd S. Peck   +4 more
wiley   +1 more source

Study on the Ensuring of Reliability and Repeatability of Research in the Area of Marine Ecology through Calibration of Underwater Acoustics Devices

Applied Sciences
This paper emphasizes the crucial needs and reasons to ensure the reliability and repeatability of underwater acoustic measurements. As an exemplification of the aforementioned acoustic measurements challenges, the development of metrological ...
Karol Jakub Listewnik, Janusz Mindykowski   +1 more
doaj   +1 more source

Studies into the detection of buried objects (particularly optical fibres) in saturated sediment. Part 1: background

, 2007
Damaged submarine fibre optic telecommunication cables have, in the past, beenlocated by the use of remotely operated underwater vehicles. These are fitted withsensors which have the capability to detect the metal shielding in the metallic coresused in ...
Leighton, T.G., Evans, R.C.P.
core  

Propagação do som em lâminas de águas rasas por acústica de raios / [PDF]

, 1999
Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro ...
Vitoy, Ricardo
core  

Bed‐level tools for monitoring erosion and accretion patterns: Flume validation and field testing

Limnology and Oceanography: Methods, EarlyView.
Abstract Monitoring short‐term changes in surface sediment elevation is fundamental to understanding erosion, transport, and deposition dynamics in shallow coastal environments. However, commonly used field approaches, such as horizontal markers, sediment erosion tables, subsurface sediment plates, or erosion pins, are not always cross‐validated under ...
Lucía Rodríguez‐Arias, Inés Mazarrasa, Beatriz Marin‐Diaz, Teresa Alcoverro, Barbara Ondiviela, Jordi F. Pagès, Eduardo Infantes   +6 more
wiley   +1 more source