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Keyword
single-beam echosounders
306 record(s)
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Acoustic measurements.
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Assessment of small pelagic species resources in the Gulf of Lion using echointegration and trawl hauls to identify the observed echoes. This fell under the SIDEPECHE project.
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Assessment of small pelagic species resources in the Gulf of Lion using echo-integration and trawl hauls to identify the observed echoes. This falls under the SIDEPECHE project.
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Assessment of small pelagic species resources in the Gulf of Lion using echo-integration and trawl hauls to identify the observed echoes. The cruise was related to the EASYPECHE project.
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The series of PELMED cruises began in 1993. Their objective is to assess small pelagic resources in the Gulf of Lion, using the echo-integration method and trawling to identify the detections observed. Until 2007, each cruise consisted in systematically prospecting from Port-Vendres to Marseille, along 9 legs set 12 nautical miles apart, perpendicular to the coast, in daytime (6 am to 9 pm), along the entire width of the continental shelf. Acquisition along legs for acoustic prospection covered 440 nautical miles and the catches from trawling to identify the structures encountered led to a complete analysis: number and weight by species, size sampling, otolith samples taken in order to construct size-age keys for sardines, anchovies and hake, updating of biological parameters.
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Assessment of small pelagic species resources in the Gulf of Lion using echo-integration and trawl hauls to identify the observed echoes. This is related to the SIDEPECHE programme.
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The main objective of the MOOSE-GE cruises is to observe the annual evolution of the Northwestern Mediterranean Sea in the context of the climate change and anthropogenic pressure in order to be able to detect and identify long-term environmental trend and anomalies of the marine ecosystem. The annual cruise focuses on moorings maintenance and hydrology, biogeochemistry and biology monitoring of the Northwestern Mediterranean basin. It aims to follow variability of water masses properties (LIW and WMDW) and biogeochemical and biological content related to these water masses. BILLION 32 cruise was part of this cruise too.
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Retrieving an array of moored current meters recording subtidal circulation on the ocean margins of the Bay of Biscay (Armorican and Aquitaine shelves and slopes). Related hydrological measurements taken. This falls under the ASPEX project.
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<p style="margin-left:0cm; margin-right:0cm">This multidisciplinary and integrated study comprises geophysical, sedimentological and (bio)geochemical data and aims to present a holistic view on the interaction of both environmental and geological drivers in cold-water coral mound development in the Gulf of Cadiz. In this context, it was fundamental to obtain "samples from the deep" to explore and characterize the biodiversity thought (1) geophysical and video imaging, (2) targeted microbiological profiling, (3) evaluation of present and past oceanic conditions.</p> <p style="margin-left:0cm; margin-right:0cm">Targeted microbiological and biogeochemical transects with long sediment cores were proposed to elicit the 3D spatial architecture and diversity of the microbial mound community and its possible role in slope stabilization. Off-mound cores were also targeted in order to evaluate present and past oceanic conditions by dating of the cored sequences and by reconstruction of water mass and sedimentary dynamics variability for eliciting the time frame of natural biodiversity changes.</p> <p style="margin-left:0cm; margin-right:0cm">The key objective aiming to investigate the microbial diversity and the functional link microbes-metazoans was addressed through biogeochemical approaches (biomarkers), molecular fingerprinting (DGGE, 16S rRNA), fluorescence in situ hybridization (FISH) and laboratory culture. This also includes the analysis of microbial infestation of coral frame builders and fauna-microbe interactions, in general, and the analysis of microbially mediated processes of carbonate precipitation, at various sites and scales: coral mucus, carbonate crusts, mound slopes, mound interior.</p> <p style="margin-left:0cm; margin-right:0cm">The sites targeting was mainly prepared by geophysical surveying (high-resolution sparker seismics, multibeam bathymetry) and ROV imagery, performed by RCMG (Ghent University). Especially the location of all on-mound core sites was determined from interpretation of the ROV Genesis dives during the CADIPOR III campaign of June 2007 on board of R/V Belgica. Additional information was made available through cooperation within past or ongoing European projects such as ESF EuroMARGINS "Moundforce", EC FP5 RTN "EURODOM" and EC FP6 IP "HERMES". Although the MiCROSYSTEMS-MD169 cruise focus was on the Pen Duick Escarpment (PDE), (8 sites, Figures 1 and 2) also other sites such as Conger Cliff (Vernadsky Ridge) and Mercator Mud Volcano were sampled. Special attention was given to the two proposed drill sites for IODP Full proposal 673 "Atlantic Mound Drilling 2: Morocco Margin". A total of five main site locations were identified:<br> 1)The Pen Duick Mounds: Alpha, Beta, Gamma and Epsilon Mounds,<br> 2) The Vernadsky Ridge mounds: Conger Cliff,<br> 3) A depression site at the foot of PDE,<br> 4) Palaeoceanographic reference sites,<br> 5) Mercator Mud Volcano.</p> <p style="margin-left:0cm; margin-right:0cm; text-align:center"><img alt="" src="https://campagnes.flotteoceanographique.fr/campagnes/8200100/images/426.png" style="height:244px; width:500px"></p> <p style="margin-left:0cm; margin-right:0cm"><em>Figure 1: Shipboard map of the SF11 multibeam bathymetry with site tracks.</em></p> <p style="margin-left:0cm; margin-right:0cm">The coring and subsampling strategies used during this campaign were predominantly site-dependent, distinguishing between "on-mound" and "off-mound" sites. Every on-mound site was cored at least two times; one core for geochemistry and microbiology, to be sampled immediately on board, and a second core for sedimentology, palaeoceanography and chronostratigraphy, to be left unopened and stored immediately.
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Assessment of small pelagic species resources in the Gulf of Lion using echo-integration and trawl hauls to identify the observed echoes. This falls under the SIDEPECHE project.