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IEO/ Balearic Islands Oceanographic Centre
177 record(s)
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Estimation by acoustical methods stock biomass of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) Spanish Mediterranean.
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Estimation by acoustical methods stock biomass of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) Spanish Mediterranean.
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Estimating the abundance and population structure of the target species of the trawl fishery in the Mediterranean, identified in the MEDITS project (Annex I), studying the biology of exploited communities on the shelf and upper slope of the study area and the impact of fishing on ecosystems.
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Sampling at Ithioplacton stations, CTD stations and pelagic fishing, acoustic sampling with EK60 echo sounder. 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.
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CR Tunibal
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This campaign to evaluate deep demersal resources on the coasts of Algeria responds to the need to update and expand the studies and evaluations carried out in the 1980s. During this fishing prospecting campaign, 55 catches were made between 200 and 800 meters deep, using bottom trawls. To determine the abundance and properties of the main fishing resources of Algeria, it was necessary to obtain prior knowledge of the characteristics of the seabed on the sampled fishing beaches. Likewise, the precise knowledge of the bathymetry and morphology of the bottom optimized the trawl work and, in short, the achievement of the fishing campaign. GOALS Image of ship's personnel releasing trawl - Bathymetric and morphological recognition of the seabed in the upper slope and the Algerian coast. - Know the biological structure of demersal communities subjected to exploitation in the upper and middle slope of the study area. - Obtain indices of abundance and biomass of the main deep demersal species (hake, monkfish, white prawn, Norway lobster and red shrimp). - Characterize the demographic structure of the main demersal species exploited on the slope, as well as its geographical and bathymetric distribution. - Collect data and collect samples (otoliths) from deep demersal species for growth and reproduction studies. WORK AREA The bathymetric surveys were carried out at night, in such a way that sufficient time was available to elaborate the bathymetric maps and digital terrain models. This allowed the selection of the haul zones and served as an electronic cartography for navigation.
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The general objective of the RADMED-DOS project is the multidisciplinary monitoring of the platform and deep waters of the Mediterranean, the peninsular coast and the Balearic Islands.
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The general objective of the RADMED-DOS project is the multidisciplinary monitoring of the platform and deep waters of the Mediterranean, the peninsular coast and the Balearic Islands.
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Get more information regarding the characteristics and distribution of benthic habitats present inside the Columbretes Islands Marine Reserve with the objective of Develop a bionomic map that covers the total extent. The complementary objective is the realization of the benthic cartography. It is intended to achieve location and subsequent georeferencing of the upwelling of gases present in the environment of the volcanic archipelago that forms The study area of this campaign. Associated with this objective is intended to know the Bacterial community in the area of gaseous upwellings and a physicochemical characterization of these areas.
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Seasonal variability of the circulation and chemical propert