Browsing by Author "Monteiro, Silvia"
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- Management for sustainable cephalopod fisheries in Europe: review and recommendationsPublication . Pierce, Graham; Abad, Esther; Ainsworth, Gill; Alcock, Loise; Bobowski, Bianca; Gonzalez, Angel; Gras, Michael; Hendrickson, Lisa; Iriondo, Ane; Laptikhovsky, Vladimir; Larivain, Angela; Longo, Katie; Macho, Gonzalo; Matos, Fabio; Monteiro, Silvia; Montero-Castaño, Carlos; Moreno, Ana; Moustahfid, Hassan; Oesterwind, Daniel; Pita, Cristina; Roa-Ureta, Ruben; Robin, Jean- Paul; Roumbedakis, Katina; Seixas, Sónia; Sobrino, Ignacio; Valeiras, Julio; Villasante, Sebastian; Power, Anne MarieAlthough cephalopod fisheries are of world-wide importance, in Europe catching cephalopods is managed only in small-scale fisheries, at national level, and few stocks are formally assessed. Because cephalopods are not quota species under the EU’s Common Fisheries Policy, there is currently no requirement for assessment or management at European level. Given increasing interest in targeting cephalopods in Europe, there is a risk that they will be fished unsustainably. Although there have been recent review papers on progress in stock assessment and fishery forecasting for commercially fished cephalopods there has been no recent review of cephalopod fishery management. We aim to fill this gap, with a particular focus on European cephalopod fisheries.We review potential barriers to sustainable fishing and reasons why management of cephalopod fisheries differs from that for finfish fisheries, e.g. due to the high inherent volatility and the possibly cyclic nature of year-to-year variation in cephalopod abundance, reflecting their short lifespan, rapid growth and high sensitivity to environmental conditions. We review fishery management approaches in important cephalopod fisheries worldwide (e.g. in the USA, Japan, Falklands, South Africa, Australia and Russia) and current management of small-scale cephalopod fisheries in Europe. We identify knowledge gaps and limitations to current monitoring programmes and stock assessments and discuss the options available for cephalopod fishery management in Europe, considering the suitability or otherwise of catch and effort limits, use of closed areas and seasons, restrictions on sizes caught and types of fishing gear, and the ole of market-based sustainability pathways.
- Spatial distribution of Cephalopods of the European Shelf and their associated oceanographic parameters based on occurrence in standardized demersal fishing trawlsPublication . Oesterwind, Daniel; Matos, Fábio; Abad, Esther; Certain, Gregoire; Fotiadis, Nikolaos; Gonzales, Ángel; Laptikhovsky, Vladimir; Lishchenko, Fedor; Moreno, Ana; Monteiro, Silvia; Montero, Carlos; Moustahfid, Hassan; Pierce, Graham; Power, Anne Marie; Robin, Jean-Paul; Seixas, Sónia; Valeiras, JulioChanging oceans impact the whole marine ecosystem in different ways. For example, rising ocean temperatures can affect the presence / absence of species, especially when local environmental conditions exceed individual species’ physiological tolerances. Accordingly, climate change has caused shifts in distribution and expansions for various cephalopods worldwide. Cephalopods play an important role in the ecosystem, especially in food webs. Consequently, spatial distribution shifts might help explain observed ecosystem changes. Therefore, maps for cephalopod distributions need to be reviewed and updated. Meanwhile, information on the associated environmental conditions will permit future occurrence of cephalopods to be modelled, which is interesting from a fishery and ecological perspective. Some information about physiological tolerances of cephalopods are known from laboratory studies and aquaculture experience, as well as from field observations. Laboratory data are often based on narrow ranges, depending on the experimental design, and can therefore provide only a limited understanding of physiological tolerances. On the other hand, field observations are also limited due to the spatial and temporal limitations of surveys, but these might provide a more realistic picture of natural tolerances. Here, we use the ICES Datras dataset to, first, describe the current distribution of cephalopods associated with the European shelf and, second, advance the knowledge regarding environmental ranges of the various species included in the analysis by combining occurrence data with in-situ oceanographic data. An additional literature review will provide information about the different environmental requirements of various life stages. The results allow us to increase the knowledge of physiological preferences of various cephalopod species within the North-East Atlantic Ocean. Finally, we will discuss and present potential future trends in cephalopod occurrence within the NE Atlantic. In order to further strengthen our knowledge of physiological tolerances of various cephalopod species more data on life history and life stages is needed to develop a more advanced mechanistic model.
- Working group on cephalopod fisheries and life history (WGCEPH; outputs from 2019 meeting)Publication . Abad, Esther; Badouva, Nicholas; Fotiad, Nikolaos; González, Ángel; Iriondo, Ane; Juarez, Ana; Karatza, Alexandra; Laptikhovsky, Vladimir; Larivain, Angela; Lefkadito, Evgenia; Lishchenko, Fedor; Matos, Fábio; Moreno, Ana; Monteiro, Silvia; Oesterwind, Daniel; Perales-Raya, Catalina; Petroni, Michael; Piatkowski, Uwe; Pierce, Graham John; Pita, Cristina; Power, Anne Marie; Robin, Jean-Paul; Rocha, Alberto; Samara, Elina; Santurtun, Marina; Seixas, Sónia; Silva, Luis; Smith, Jennifer; Sobrino, Ignacio; Valeiras, Julio; Villasante, Sebastian