Acronym RAI-AP-26/2007
Category
Fisheries
Title Informe del seguimiento científico de la acción piloto RAI/AP-26/2007: pesca experimental con arte de arrastre de fondo en el Golfo de León (Mediterráneo Noroccidental) - RAI / AP-26/2007: Experimental fishing with bottom trawl gear in the Gulf of León (North-western Mediterranean) Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Enric Massuti Coordinator email enric.massuti@ba.ieo.es
Coordinator institution
IEO - Spanish Institute of Oceanography (Spain)
Institutions involved
NA
Start year 2007 End year 2008 Funding (€) € 95,700 Website http://www.repositorio.ieo.es/e-ieo/bitstream/handle/10508/991/RAI-AP-26-2007.pdf?sequence=1&isAllowed=y Summary From 24 October to 18 December 2007, 67 experimental bottom trawlers were carried out on board the vessels B/P Berto and B/P Sort de Taranet, in fishing grounds on the slope of the Gulf of León, located in international waters east of Cape Creus and between 70 and 100 miles from its base port (Port de la Selva). Both vessels worked continuously for 46 hours per week (their usual activity period is 5 days per week and 12 or 16 hours per day), using a square-dragon type trawl, which they normally use for their commercial fishing operations in the area.
Simultaneously, one vessel used the traditional 40mm rhombic mesh codend, while the other used a 40mm square mesh codend. This made it possible to compare the selectivity of both codends by the parallel fishing method. Of the total catches, 50 were considered valid for data analysis, based on two bathymetric strata: (i) 300-450 m, directed at Norway lobster (B/P Berto: 14 catches between 357 and 434 m; B/P Sort de Taranet: 14 catches between 371 and 451 m); (ii) 450-700 m, targeting red shrimp (Berto P/P: 11 catches between 478 and 692 m; Sort de Taranet P/B: 11 catches between 493 and 571 m). Average yields have been estimated, standardized at the time of effective trawling, their commercial and discarded fraction and the size distribution of the main species of commercial and ecological interest.
At the same time, information has been collected on landings and fuel consumption for this pilot action and for the same period in 2006, in which these vessels carried out their routine fishing activity. The analysis of this information has been carried out using univariate and multivariate techniques. The high yields, as well as the size distribution of the catch of the main exploited species, indicate that the prospected bottoms are little exploited. In both bathymetric strata, discards were reduced with the square mesh, without a significant decrease in commercial yields. In the same way, the fishing strategy applied during the pilot action reduced the effective fishing effort, without reducing the performance of the fishery compared to the same period in 2006. In addition, fuel consumption was considerably reduced, which had a positive effect on fishing activities. rates of fuel consumed per unit of landings. The exploitation strategy applied in the pilot action improves the cost-efficiency ratio of the fishery and presents a series of advantages, both in terms of improvement in fishing performance and in the exploitation of resources, as well as of an environmental and social nature. However, applying this strategy to commercial exploitation entails risks for the maintenance of stocks of exploited species and the conservation of habitats of special interest and vulnerable marine ecosystems, in an area with numerous submarine canyons, such as the Gulf of León.
Goals:
(1) Evaluar el potencial pesquero de caladeros poco explotados en aguas internacionales del talud del Golfo de León, como alternativa a los caladeros tradicionales más explotados, e introducir la malla cuadrada en el copo de la red, para mejorar la selectividad de esta pesquería; (2) Reducir el esfuerzo pesquero real, manteniendo el rendimiento económico, a través del ahorro de combustible; (3) Mejorar la relación coste-eficiencia de la pesquería, lo que redundaría en la disminución de las emisiones de CO2 a la atmósfera, y reducir las horas semanales de trabajo de los tripulantes, de cara a mejorar su calidad de vida, lo que ayudaría a paliar los problemas de falta de mano de obra que están empezando a padecer algunas pesquerías mediterráneas.
Keywords
Shellfish;
Crustacean;
Crustacean fisheries;
Physical disturbance;
Fishing technology;
Gear selectivity;
Discard;
Shrimp;
Lobster;
Environmental impact;
Trawling;
Marine Region
49
Gulf of Lions (GSA 7)
1
Marine Region Map
