CR Tunibal

Influence of oceanographic structure and dinamics on DEmersal populations in waters of the BAlearic Islands

Influence of oceanographic structure and dinamics on DEmersal populations in waters of the BAlearic Islands

Influence of oceanographic structure and dinamics on DEmersal populations in waters of the BAlearic Islands

Annually, the European Union develops two research campaigns in the area of ​​NAFO (North Atlantic Fisheries Organization), one in the 3NO division and another in the 3M and 3L (Flemish Cap Series). This campaign is part of a historical series in order to provide indices for the evaluation of the stock of halibut and other groundfish species in the area such as flounder, redfish, grenadier, cod or shrimp. The Flemish Cap bank is an isolated bank of the American coastal platform with an area greater than 10,000 square miles and is located outside of the Exclusive Economic Zone of Canada. The exploitation of the resources of this area is regulated by the international agreements of NAFO. GOALS Estimation of abundance and biomass indices of the target species, as well as the study and analysis of the demographic structure of their populations and the oceanographic conditions in the Bank.

This third investigation of the spillage of fuel in waters of Galicia and the Cantabrian Sea intended to continue the study of the impact of oil spills. In this edition, the monitoring of the process of recovery of ecosystems and exploited resources involved a study during spring flowering, period of higher production, to quantify the changes in the patterns of distribution and abundance of the communities. This campaign of 'evaluation of the impact of the Prestige discharges on the ecosystem of the platform and its fishing resources in spring time' was attended by researchers from the IEO, SGPM and CSIC. GOALS The general objective was to estimate the impact produced by the Prestige discharge on the demersal and benthic communities present on the continental shelf of Galicia, in soft bottoms between 35 and 500 meters. These communities are subject to considerable fishing exploitation and sustain the economy of numerous coastal towns of Galicia and the Cantabrian Sea. At the same time, geophysical studies were included, aimed at improving the knowledge of the funds of the internal platform, essential for carrying out sampling operations. The study was articulated around the following objectives: WORK AREA A multidisciplinary campaign of 16 days was proposed in the area of ​​the platform between the Ría de Vigo and the mouth of the Bidasoa river. The study was conducted in affected areas of the continental shelf of Galicia and the Cantabrian Sea in funds between 35 and 500 m. To this end, a series of sampling stations arranged in radials and located in five geographical sectors and three depth layers (71-120, 121-200 and 201-500 m) were established, which corresponded to those of the historical series of survey campaigns. of the IEO (following figure). In areas of special interest due to the importance of the discharges, hauls were made at less than 70 m.

Within the framework of cooperation between the Ministry of Agriculture, Fisheries and Food (MAPA) and the Ministry of Fisheries of the Republic of Angola, the campaign to evaluate the main species of crustaceans and other demersal resources of existing fishing interest was undertaken on the platform and slope of the Exclusive Economic Zone of the Republic of Angola. WORK AREA The investigation was developed in the area of ​​the platform and the slope of the Exclusive Economic Zone of the Republic of Angola between the parallels 5º S and 12º S, from 12 miles from the coast, counted from the baseline, to the Isobot of the 800 meters deep.

From day 6 to day 21 of the month of October the B / O Vizconde de Eza made the first of a series of multidisciplinary campaigns aimed at improving knowledge of El Cachucho fishing ground, located on the Asturian marginal shelf within the Spanish EEZ. This fishing ground is characterized by being a very irregular zone, presenting slopes greater than 45 degrees in some areas. The study of benthic communities and demersal fish was supported by exhaustive studies of other disciplines in order to obtain information about their environment and existing trophic relationships. The results obtained, and analyzed separately, of each discipline are of great value due to the unique characteristics of the fishing ground, but the common effort of the participants to relate all the subjects adds to the campaign an incalculable value in the scientific field and unique knowledge for the management of the fishery in the current framework that advocates sustainable development. GOALS Due to the scarce bathymetric information in the fishing grounds, the first part of the campaign focused on obtaining an accurate bathymetry of the study area that served as the basis for the physical, chemical, geological and biological studies that the different participating teams carried out. then. WORK AREA Image of the work area comprising the upper part of the Le Danois bank and the area between this elevation and the Lastres canyon The bank's funds are difficult to access, due to their depth and relief, for most of the instruments that come into contact. This limits the area of ​​the study area. Mainly the works were oriented to the upper part of the bank Le Danois and to the area between this elevation and the Lastres

CTD data in the Flemish Cap area.

Estudio de la variabilidad de las condiciones hidrodinamicas en aguas de las Islas Baleares Influencia que tienen estas sobre la circulaci??n regional y esta sobre las comunidades planctonicas estudio de tendencias climaticas y su posible relacion con otros parametros biologicos y pesqueros.