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    Monthly survey to study thermohaline and biological characterization of water masses in the East-North Atlantic.

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    <p>MOOSE-GE aims at 1) ensuring the maintenance of offshore French Mediterranean moorings and 2) carrying out an annual mapping of hydrological, biogeochemical and biological characteristics of the whole north-western basin. The related project are MERMEX, HYMEX, MISTRALS and MOOSE.</p>

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    Small pelagic fish are both the keystone species of the ecosystem because of the central position they hold in the food chain and represent highly significant economic stakes for fisheries since they make up the majority of landings in the French Mediterranean (approximately 50% of catches for sardines and anchovies; Demaneche et al. 2009). So, to assess stocks and propose appropriate management methods, it is important to have both good knowledge about these species and independent fisheries data. Ifremer's fisheries science laboratory in Sète has monitored these populations since the 1990s. In 2002, the EU asked Member States to formalize certain operations by contract, in this context, the PELMED cruise was part of the extended contractual programme for biomass assessment (DCF). Therefore, each year France is obliged to assess the biomass of small pelagic species in the Mediterranean, in order to determine the stocks' status and propose management measures. These assessments are carried out in the framework of the general fisheries commission for the Mediterranean (CGPM). Since numerous countries had begun monitoring these species using acoustic methods, the MEDIAS (MEDIterannean Acoustic Surveys) scientific group was created in 2008 with the objective of standardizing the protocols. Finally, national management plans for Gulf of Lion fisheries were set up in 2014 (particularly for pelagic trawlers and purse seines) with scientific objectives touching on the biomass of small pelagics. The PELMED cruise, whose main aim is to directly assess the small pelagics biomass, is conducted therefore in a clearly institutional framework (national, European and Mediterranean). However, the scientific stakes remain just as important. Since 2008, a special situation has been observed in the Gulf of Lion, where the biomasses of sardines and anchovies (and even mackerel) have decreased synchronously. Even more unexpectedly, although the recruitment rates observed over the past few years in the species are particularly high, the populations don't seem to be growing back and their biomass is continuing to drop. This is particularly surprising in a marine ecosystem where recruitment is generally considered to be the determining factor of population dynamics for species with a short life span. The collection of biological parameters on species of small pelagics done during the previous PELMED cruises made it possible to highlight significant demographic changes (loss of large age classes, decrease in size, poorer body condition) which seem to suggest "bottom-up" population control. Therefore, the ecosystem-based nature of the PELMED cruises (from physical parameters to top predators, not to mention phyto- and zooplankton and fodder fish) appears to be crucial in understanding the dynamics of these populations. It was decided this year to stop prospecting the Catalan Sea, in order to extend the spatial coverage to the east of the Gulf in the PACA region (from Marseille to Nice). Since the narrowness of the shelf in this zone does not allow for prospecting along "classic" legs, the objective will be to validate a prospection method which is adapted to the area.

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    <p>The Protevs Med 2017 campaign aimed to explore the area of the northern Balearic front and the southern edge of the convection area of the north western basin at the end of winter when convection events are most likely. Sampling to target small mesoscale structures detectable by altimetry but also even smaller structures that did not sign on altimetry.</p> <p>A particular focus was placed on an anticyclonic structure in the southern Balearic Islands that is systematically detectable by altimetry but which appears to be an artifact.</p> <p>Finally, the edge of the Catalan shelf was explored at high resolution.</p>

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    They focus on the seabed research of the Cantabria, both indirect and direct. Carry out a survey of the fishing beaches to later elaborate fishing charts. Systematic bathymetric survey of the study areas with 100% coating (Multi-beam echo sounder EM-302). seismic profiles according to the ship's defeat (Topas 710 system). Performance of sound velocity profiles in the water column. Side sweep sonar in selected areas. Sediment sampling (Shipeck dredges - Box corer). Sampling of Rocky Outcrops (Rock Dredge).

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    The surveys on NAFO Regulatory Area of Div. 3L (Flemish Pass) were initiated by Spain in 2003. The surveys were carried out by the R/V “Vizconde de Eza” following the same procedures and using the same bottom trawl net type Campelen. The main objectives of this survey time series are: a) to obtain abundance indices of the main exploited species, b) to study the structure and distribution of these demersal species in the area.

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    The main objective of this series of individual cruises is to produce both an index and a direct estimate of the biomass of the north east Atlantic and Bay of Biscay sardine stock and an index for the southern and western sardine stocks. The general method is to quantify the freshly spawned eggs in the water column on the spawning grounds, report egg species identification and staging. To be able to establish a relationship between eggs and biomass of the spawning stock, the fecundity of the females must also be determined. The realised fecundity is used in combination with the calculated number of freshly spawned eggs in the water to render an estimate of the spawning stock biomass. To provide reliable estimates of the quantity of spawned eggs and the fecundity an extensive coverage of the spawning area is required both in time and space. Provide temperature data from the CTD casts will be used for the egg ageing procedure. Other environmental variables will be used for hydrographic and spawning area characterization.

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    The main objective is the collection of data that allow estimate the abundance, biomass and demographic structure of the species of commercial interest in the regulation area NAFO, until a maximum depth of 1500 m.

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    The main objective is to know the state of the populations of the species objective: their abundance, biomass and demographic structure, and the conditions oceanographic in the Bank. Species objective: Gadus Morhua, Sebastes Marinus, Sebastes Mentella, Sebastes fasciatus, Hippoglossoides Platessoides, Reinhardtius Hippoglossoides, Macrourus berglax and Pandalus borealis.

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    <p>The Protevs Med 2017 campaign aimed to explore the area of the northern Balearic front and the southern edge of the convection area of the north western basin at the end of winter when convection events are most likely. Sampling to target small mesoscale structures detectable by altimetry but also even smaller structures that did not sign on altimetry.</p> <p>A particular focus was placed on an anticyclonic structure in the southern Balearic Islands that is systematically detectable by altimetry but which appears to be an artifact.</p> <p>Finally, the edge of the Catalan shelf was explored at high resolution.</p> <p>&nbsp;</p>