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Registros recuperados: 8
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Benthis. Final Report ArchiMer
Rijnsdorp, Adriaan D.; Eigaard, Ole R.; Kenny, Andrew; Hiddink, Jan Geert; Hamon, Katell; Piet, Gerjan; Sala, Antonello; Nielsen, Rasmus; Polet, Hans; Laffargue, Pascal; Zengin, Mustafa; Gregerson, Olavur.
BENTHIS developed the scientific basis to quantify the impact of bottom trawling on the seafloor and the benthic ecosystem. Based on insight in how fishing gear affects the seafloor, an assessment framework was developed that provide indicators of impact and seafloor status on a continuous scale that can be applied in the context of the MSFD. The mechanistic approach allows us to set reference values of impact (status) to estimate the proportion of a region or habitat where the impact is below (status is above) the threshold. The methodology combines estimates of trawling intensity with the depth to which the fishing gear penetrates into the sea bed (penetration profile) and the sensitivity of the habitat. Habitat sensitivity is estimated from the...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00425/53653/54489.pdf
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Fishing Sea-bed Habitat Risk Assessment (A framework towards the quantitative assessment of trawling impact on the sea-bed and benthic ecosystem) ArchiMer
Rijnsdorp, A.d.; Bastardie, Francois; Bolam, S.g.; Buhl-mortensen, Lene; Eigaard, O.r.; Hamon, Katell G.; Hiddink, Jan Geert; Hintzen, N.t.; Ivanovic, Ana; Kenny, Andrew; Laffargue, Pascal; Nielsen, R.n.; O’neill, F.g.; Piet, G.j.; Polet, Hans; Sala, Antonello; Smith, Chris; Van Denderen, P.d.; Van Kooten, Tobias; Zengin, Mustafa.
A framework to assess the impact of mobile fishing gear on the seabed and benthic ecosystem is presented. The framework that can be used at regional and local scales considers the physical effects of trawl gears on the seabed, on marine taxa and the functioning of the benthic ecosystem. A reductionist approach is applied that breaks down a fishing gear in its components and distinguishes a number of biological traits that are chosen to determine the vulnerability of benthos for the impact of a gear component or to provide a proxy for their ecological role. The approach considers a wide variety of gear elements, such as otter boards, twin trawl clump and ground-rope, and, sweeps that herd the fish. The physical impact of these elements on the seabed,...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00425/53642/54479.pdf
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Functional links between sea-bed habitats and demersal fish stocks (A generic model of benthic productivity, diversity and natural disturbance, and a dynamic food web model of benthic ecosystem function) ArchiMer
Rijnsdorp, A.d.; Van Kooten, T.; Van De Wolfshaar, K.; Eggleton, J.; Bolam, S.g.; Buhl-mortensen, Lene; Garcia, C.; Gonzalez, G.; Dinesen, Grete; Papadopoulou, Nadia; Smith, Chris; Gumus, A.; Bastardie, François; Eigaard, O.r.; Hiddink, Jan Geert; Sciberras, M.; Kenny, Andrew; Laffargue, Pascal; Piet, G.j.; Polet, Hans; Van Denderen, P.d.; Van Kooten, Tobias; Zengin, Mustafa.
An important consideration in assessing the impacts of fishing on seabed habitats is to understand the functional links (as trophic interactions) between populations of demersal fish species and potential benthic invertebrate prey (food) which live on or in the seabed. The type of sea-bed fauna has been shown to respond to both natural variation in habitat conditions and in response to different levels of fishing pressure. The extent to which different commercial fish species will depend on specific combinations of habitat type and fishing disturbance to feed will likely be species specific. It has been suggested that positive changes in growth rates of different demersal fish species are not only related to density-dependent processes, but may also be...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00425/53641/54478.pdf
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Report Management Strategy Evaluation and performance test of the decision- support tool(s) ArchiMer
Piet, Gerjan; Soma, Katrine; Bonanomi, Sara; Laffargue, Pascal; Nielsen, J. Rasmus; Notti, Emilio; Polet, Hans; Sala, Antonello; Zengin, Mustafa; Rijnsdorp, Adriaan.
The mobile demersal gears currently applied in the fishery sectors across Europe are known to have a large impact both directly and indirectly on the benthic habitats and communities. There is increasing concern about these impacts and the aim is to reduce these impacts on the wider ecosystem without compromising the ability of the fishery to provide food or maintain a socio-economically viable fishery. This is reflected in the main policy framework, i.e. the Common Fisheries Policy (CFP), which encourages an ecosystem based approach, in which benefits from living aquatic resources are ensured ‘while the direct and indirect impacts of fishing operations on marine ecosystems are low and not detrimental to the future functioning, diversity and integrity of...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00425/53647/54484.pdf
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Report on assessing trawling impact in regional seas ArchiMer
Nielsen, J. Rasmus; Bastardie, Francois; Buhl-mortensen, Lene; Eigaard, Ole; Gümüs, Aysun; Hintzen, Niels T.; Kavadas, Stefanos; Laffargue, Pascal; Mehault, Sonia; Notti, Emilio; Papadoupoulou, Nadia; Polet, Hans; Reid, David; Rijnsdorp, Adriaan D.; Rochet, Marie-joelle; Robert, Alexandre; Sala, Antonello; Smith, Chris; Virgili, Massimo; Zengin, Mustafa.
Baltic Sea Benthic ecosystem impacts from demersal fishery in the western Baltic is assumed to come mainly from Nephrops trawling in the central and southern Kattegat, mussel dredging in the Belt Sea, and mixed cod trawling in the western Baltic Sea.These fisheries both impact the seabed, as well as produce substantial amounts of discards. The western Baltic Sea offer a unique opportunity to analyse the benthic effects of fishingthanks to the closure of Øresund to towed gears since the 1920s, and the introduction of the Kattegat MPA in2009 (including cod closure) and the western Baltic Sea Natura-2000 areas. Furthermore an extensive benthic nationalmonitoring and data collection effort has taken place in the area over a number of years, which can be usedto...
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00310/42142/41453.pdf
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Report on options for mitigation fishing impacts in regional seas ArchiMer
Sala, Antonello; Bastardie, Francois; De Carlo, F.; Dinesen, Grete E.; Eigaard, Ole; Feekings, J.p.; Frandsen, R.f.; Jonsson, P.; Krag, L.a.; Laffargue, Pascal; Magnusson, M.; Nielsen, J. Rasmus; Notti, Emilio; Papadoupoulou, Nadia; Polet, Hans; Rijnsdorp, A. D.; Sköld, Mattias; Smith, Chris; Van Marlen, B.; Virgili, Massimo; Zengin, Mustafa.
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Ano: 2014 URL: http://archimer.ifremer.fr/doc/00310/42144/41456.pdf
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Report on results of sea trials in the regional seas ArchiMer
Sala, Antonello; Nielsen, J. Rasmus; Rijnsdorp, Adriaan D.; Polet, Hans; Laffargue, Pascal; Smith, Chris; Zengin, Mustafa.
Each of the regional case studies focus on one or more fisheries that are representative of the region and comprise the full range of fishing gears that are widely used in European waters and are highly relevant in the context of mitigating their impact on benthic ecosystems. Case studies identified are the Baltic Sea (Nephrops trawl, Otter trawls for cod, Blue mussel fishery), North Sea (Beam trawl, Shrimp trawl), Western waters (Nephrops trawl, Scallop trawl, Otter trawl on biogenic habitats), Mediterranean Sea (Otter trawl), Black Sea (Rapa whelk fishery with beam trawls and commercial demersal fisheries with bottom trawls). In each of the case studies, a full analysis of a selected fishery including the assessment of the current impact on the benthic...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00425/53649/54487.pdf
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Report on technological innovations and management scenario’s to mitigate fishing impacts on the benthic ecosystem and their socio-economic consequences in regional seas ArchiMer
Sala, Antonello; Nielsen, Rasmus; Polet, Hans; Laffargue, Pascal; Smith, Chris; Zengin, Mustafa; Rijnsdorp, Adriaan.
This report provides a detailed account of the field and modelling studies carried out in the BENTHIS project in the Baltic Sea, North Sea, Western Waters, Mediterranean and Black Sea on the mitigation of bottom trawling impacts on the seafloor and benthic ecosystem. The studies were conducted in close collaboration with fishers and gear manufacterers and focused on the major bottom trawl fisheries in European waters: otter trawl fisheries for demersal fish, otter trawl fisheries for Nephrops, beam trawl fisheries for flatfish, beam trawl fisheries for brown shrimps, beam trawl fisheries for whelks, dredge fisheries for bivalves (mussel, scallops). Both technological innovations and alternative management scenarios were explored. Technological innovations...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00425/53635/54473.pdf
Registros recuperados: 8
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