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Registros recuperados: 6
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Benthic impact of fisheries in European waters: the distribution and intensity of bottom trawling ArchiMer
Eigaard, Ole R.; Bastardie, Francois; Hintzen, Niels; Buhl-mortensen, Lene; Buhl-mortensen, Pål; Catarino, Rui; Dinesen, Grete E.; Fock, Heino; Geitner, Kerstin; Gerritsen, Hans; Gonzalez, Manuel M.; Jonsson, Patrik; Kavadas, Stefanos; Laffargue, Pascal; Lundy, Mathieu; Mirelis, Genoveva G.; Nielsen, Rasmus; Papadopoulou, Nadia; Posen, Paulette; Pulcinella, Jacopo; Russo, Tomasso; Sala, Antonello; Silva, Cristina; Smith, Chris; Vanelslander, Bart; Zengin, Mustafa; Rijnsdorp, Adriaan D..
Mapping and monitoring of pressure from fishery on the marine benthic environment is necessary to support an ecosystem approach to fisheries management (EAFM). In many cases this need is not reflected in official fisheries statistics and logbooks, where focus typically is on catch rather than effort. Consequently, most logbook information is not well suited for quantitative estimation of seafloor impact (swept area and impact severity) of the different gears and trips. We developed a method to overcome this information deficiency of official statistics and produced European wide high-resolution fishing intensity maps (total yearly swept area within grid cells of 1*1 minutes longitude and latitude) for 2010, 2011 and 2012. The annual distribution and...
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00310/42138/54476.pdf
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Benthos distribution modelling and its relevance for marine ecosystem management ArchiMer
Reiss, Henning; Birchenough, Silvana; Borja, Angel; Buhl-mortensen, Lene; Craeymeersch, Johan; Dannheim, Jennifer; Darr, Alexander; Galparsoro, Ibon; Gogina, Mayya; Neumann, Hermann; Populus, Jacques; Rengstorf, Anna M.; Valle, Mireia; Van Hoey, Gert; Zettler, Michael L.; Degraer, Steven.
Marine benthic ecosystems are difficult to monitor and assess, which is in contrast to modern ecosystem-based management requiring detailed information at all important ecological and anthropogenic impact levels. Ecosystem management needs to ensure a sustainable exploitation of marine resources as well as the protection of sensitive habitats, taking account of potential multiple-use conflicts and impacts over large spatial scales. The urgent need for large-scale spatial data on benthic species and communities resulted in an increasing application of distribution modelling (DM). The use of DM techniques enables to employ full spatial coverage data of environmental variables to predict benthic spatial distribution patterns. Especially, statistical DMs have...
Tipo: Text Palavras-chave: Ecosystem approach; Environmental monitoring; Habitat suitability modelling; Macrofauna; Mapping; Marine spatial planning (MSP); Predictive modelling; Species distribution modelling.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00203/31405/29915.pdf
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Biological traits as functional indicators to assess and predict (using statistical models) the status of different habitats - ArchiMer
Bolam, Stéphane; Eggleton, Jacqueline D.; Garcia, Clement; Kenny, Andrew J.; Buhl-mortensen, Lene; Gonzalez, Genoveva; Kooten, Tobias; Dinesen, Grete E.; Hansen, Jorgen; Hiddink, Jan Geert; Sciberras, Marija; Smith, Chris; Papadopoulou, K. Nadia; Gumus, Aysun; Van Hoey, Gert; Laffargue, Pascal; Eigaard, Ole; Bastardie, Francois.
One of the most widespread yet manageable pressures imposed on the seabed is that resulting from disturbance of the substrate by towed demersal fishing gear (bottom fishing and dredging). Demersal fishing gears are deployed on every continental shelf in the world and, in UK waters, the footprint of fishing is estimated to account for over 99% of the known footprint of all human pressures on the seabed. It is, therefore, essential that current and future management of fishing activities are based on an improved scientific rationale in order to improve the long-term sustainability of this activity. While the impacts of demersal fishing on the biological characteristics of the seabed have been well-studied, the approaches have tended to focus on assessing...
Tipo: Text
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00310/42140/41451.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,...
Tipo: Text
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 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...
Tipo: Text
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00310/42142/41453.pdf
Registros recuperados: 6
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