Atlas de las flotas de pesca españolas de aguas europeas atlánticas

The European Commission has acknowledged the value of fleet-based management approaches since the 2001 Green Paper on the Common Fisheries Policy (CFP). In the 2009 Green Paper, this was again recognized as a key area of interest for future development of the CFP, in particular setting the technical basis for the recent Data Collection Framework (DCF), which specifies the standard for national fishery sampling programs within a pan-European context. These policy changes require deeper and up to date knowledge about European fleets and fisheries, thus encouraging Member States to undertake scientific projects in order to obtain appropriate fleet segmentations classifying their fishing activities within a hierarchical structure. The work presented in this book is the first comprehensive analysis of the Spanish fleets operating in Atlantic European waters, taking into account both European and national management requirements. This has been possible due to the availability of official logbooks, which provide the broadest perspective on the activity of Spanish fleets in the study area. The only exception to this is small scale fisheries, pursued mainly by vessels of less than 10 m of length and, therefore, not subject to the requirement of keeping logbooks. In order to match better European and Spanish fleet classifications, a new level (“Management Unit”) is proposed here, which is placed between “modalidad”, used in the Spanish regulations, and “métier”, as is defined by the recent DCF. Spanish national waters comprise four fishing grounds, two of which are in the European Atlantic. Nine Management Units have been identified in the Northern Spanish fishing ground: bottom otter trawl (OTB10), bottom pair trawl (PTB10), purse seine (PSN10), set long line (LLS10), set gillnet targeting hake (GNS11), set gillnet targeting anglerfish (GNS12), trolling (LTL11) and bait-boats (LHP11) targeting albacore, and hand line targeting mackerel (LHP12). Two Management Units have been identified in Southern Spanish waters: bottom otter trawl (OTB20) and purse seine (PSN20). In European waters outside Spain, six Management Units have been identified in non-Iberian waters: bottom otter trawl (OTB50), bottom pair trawl (PTB50), set long line (LLS50) and set gillnet (GNS50) by vessels of more than 100 GRT, and set long line (LLS60) and set gillnet (GNS60) by vessels of less than 100 GRT. Finally, one Management Unit using bottom otter trawl has been found to operate in Portuguese waters (OTB70). Unluckily, the analyses made on the logbooks of the Spanish fleet using drifting long line could not be used to categorize this fleet due to the geographical limitations of the logbooks available. After detailed analyses and categorization of the Management Units, the results obtained were used in an exercise to test the usefulness and feasibility of using logbook information to answer some DCF requirements. This revealed that logbooks are an essential tool to deal with bioeconomic challenges posed by the new CFP.Versión del edito

Nephrops in 8c in 2021

EVALICES2Evaluación de Recursos Marinos Vivos en el Área ICE

First Maximum Sustainable Yield advice for the Nephrops norvegicus stocks of the Northwest Iberian coast using stochastic Surplus Production model in Continuous Time (SPiCT)

The assessment of the status of fisheries resources is pivotal due to the importance of marine resources in global food security and to halt the ongoing decline in marine biodiversity. Norway lobster (Nephrops norvegicus) is one of the most valuable resources in the Northeast Atlantic. However, overfishing has caused the decline of several Nephrops stocks over the last decades, particularly in the Nephrops Functional Units (FUs) 25 (NW Spain), 26-27 (NW Spain and North Portugal) and 31 (Cantabrian Sea, North Spain). Since 2003, the information provided by the very low level of landings and fishing effort of these three stocks was insufficient to carry out an adequate analytical assessment, so the base of the assessment has been the trends from commercial catch per unit effort (CPUE). The objective of this study was to carry out the first assessment of these three stocks with an analytical MSY-based model. A review of the available data was made and the stochastic Surplus Production Model in Continuous Time (SPiCT) was fitted for each FU. The results indicate an extremely low biomass for FUs 25 and 26-27 since the mid-nineties well below the reference points. For FU 31, on the other hand, estimated biomass is larger. Our findings also identified long-term temporal and spatial changes in the population dynamic of Nephrops in the Northwest Iberian coast. The results were compare with those obtained in the same stocks with other data-limited methods. Also the role of abiotic factors on the observed dynamic of the stocks was explored. The results of this study are not only relevant for the sustainable exploitation of Norway lobster stocks off the Northwest Iberian coast but provide valuable insights into the suitability and limitations of production models for the assessment of crustacean stocks in general

Análisis de la actividad pesquera de la flota española de aguas ibéricas atlánticas y su uso en la gestión de stocks

La legislación pesquera española establece censos de buques pesqueros estructurados por caladero y modalidad (BOE, 2000). Se define “caladero” de pesca como un área geográfica sujeta a medidas de gestión o conservación singulares según criterios biológicos, mientras que se denomina “modalidad” a la forma de utilización de un determinado arte o aparejo. Cada modalidad cuenta con su correspondiente normativa, que determina las características técnicas de buques y artes o aparejos, así como las condiciones en que pueden utilizarse. En aguas bajo jurisdicción española se diferencian cuatro Caladeros Nacionales