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Registros recuperados: 10
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A bibliography on the effects of bottom fishing gear and harvesting techniques on benthic biota OMA
Redant, F..
The present bibliography covers the literature on the effects of seaweed, fish and shellfish harvesting techniques, ranging from digging and hand raking to dredging, hydraulic dredging and bottom trawling, on the sea bed, the zoobenthos and the phytobenthos.
Tipo: Info:eu-repo/semantics/book Palavras-chave: Benthos; Bibliographies; Bottom trawling; Fishing gear.
Ano: 1987 URL: http://www.vliz.be/imisdocs/publications/129257.pdf
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Analyse descriptive de la pêcherie du golfe de Tunis OceanDocs
Ben Abdallah, L.; El Abed., A.; Zarrad., R.; Missaoui., H.; Gharbi., H..
Ce travail décrit les résultats de la campagne de pêche benthique dans le golfe de Tunis. Durant la campagne de 1999, les ressources benthiques du golfe sont exploitées par 45 chalutiers. Ces unités ont enregistré une production de 590 tonnes qui est voisine à celle de deux années précédentes. Les débarquements sont constitués essentiellement de merlu Merluccius merluccius , rouget blanc Mullus barbatus, saurel Trachurus sp., chevrette Parapenaeus longirostris, pageot Pagellus sp. et spicarel Spicara sp. Le chalutage expérimental dans le golfe a donné un rendement horaire de 45Kg et un pourcentage de rejet évalué à 16%. L'étude des structures démographiques des principales espèces montre que l'exploitation dans le golfe s'effectue sur des groupes d'âge...
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Carangid fisheries; Mullet fisheries; Bottom trawling; Catch composition; Fishery surveys; Spicara; Trachurus; Merluccius merluccius; Parapenaeus longirostris; Mullus barbatus; Pagellus; Http://aims.fao.org/aos/agrovoc/c_33883; Http://aims.fao.org/aos/agrovoc/c_7842; Http://aims.fao.org/aos/agrovoc/c_41529; Http://aims.fao.org/aos/agrovoc/c_46329; Http://aims.fao.org/aos/agrovoc/c_43349; Http://aims.fao.org/aos/agrovoc/c_5502.
Ano: 2000 URL: http://hdl.handle.net/1834/4297
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Influence of bottom trawling on sediment resuspension in the 'Grande-Vasière' area (Bay of Biscay, France) ArchiMer
Mengual, Baptiste; Cayocca, Florence; Le Hir, Pierre; Draye, Robin; Laffargue, Pascal; Vincent, Benoit; Garlan, Thierry.
Sea trials were performed on two zones with different fishing efforts on the continental shelf of the Bay of Biscay ('Grande-VasiSre' area of muddy sand) in order to assess particulate matter resuspension and seabed disturbances (i.e., penetration, reworking, grain size changes) induced by different types of trawls. Optical and acoustic measurements made in the water column indicate a significant trawling-induced resuspension mainly due to the scraping action of doors. It manifests as a highly dynamic turbid plume confined near the seabed, where suspended sediment concentrations can reach 200 mg l(-1). Concentration levels measured behind an "alternative" configuration (trawls with jumper doors instead of classical doors penetrating the sediment) are...
Tipo: Text Palavras-chave: Bottom trawling; Sedimentresuspension; Seabed disturbance; Erosion flux; Bay of Biscay.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00353/46428/51396.pdf
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Numerical modeling of bottom trawling-induced sediment transport and accumulation in La Fonera submarine canyon, northwestern Mediterranean Sea ArchiMer
Payo-payo, Marta; Silva Jacinto, Ricardo; Lastras, G.; Rabineau, Marina; Puig, P.; Martin, J.; Canals, M.; Sultan, Nabil.
Bottom trawling leads to recurrent sediment resuspension events over fishing grounds. Recent studies have shown how bottom trawling can drive seascape reshaping at large spatial scales and enhance sediment transport in submarine canyons, which subsequently impacts deep-sea ecosystems. Present knowledge on the transfer and accumulation of sediment flows triggered by bottom trawling is based on localized and infrequent measurements whilst a more complete picture of the process is needed. The present work focuses on the modeling of sediment transport and accumulation resulting from trawling activities in La Fonera submarine canyon, northwestern Mediterranean Sea, thus contributing to an improved assessment of trawling impacts. Based on mooring data within a...
Tipo: Text Palavras-chave: Bottom trawling; Inverse model; Modeling; Sediment transport; Submarine canyon; Turbidity currents.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00374/48549/48862.pdf
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Observaciones sobre el comportamiento de la merluza (Merluccius hubbsi) durante la pesca de arrastre OceanDocs
Casarsa, L.; Madirolas, A..
The normal behavioral patterns of several fish species is altered during trawling affecting the fish spatial distribution. Sonar methods were carried out in this research work in order to study the reaction of reproductive concentrations of the Argentine hake (Merluccius hubbsi) during mid-water and bottom fishing trawls. Observations made from a trawl sonar mounted on the headrope of an ENGEL (35 m) bottom trawl, showed that this species concentrates at the lower-central sector of the net mouth. During daytime trawls fish schools with a vertical distribution exceeding ten meters were observed entering the trawl within the first two meters from the bottom. Some observations during pelagic trawls carried out at night, showed no specific pattern at the net...
Tipo: Journal Contribution Palavras-chave: Behaviour; Bottom trawling; Sonar; Echo surveys; Vertical distribution; Behaviour; Http://aims.fao.org/aos/agrovoc/c_868.
Ano: 2007 URL: http://hdl.handle.net/1834/2517
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Pesquerías de pulpos OceanDocs
Re, M.E..
The species composition, population structure, seasonality in catches and fishing of octopuses along the Argentine coast are described from available statistical data and capture samplings. Three species of octopuses, Octopus tehuelchus, Eledone massyae and Enteroctopus megalocyathus are caught. An artisanal intertidal fishery of O.tehuelchus occurs mainly in summer, from November-December to March-April in the North Patagonian coast, especially in the San Matias Gulf, by hooks. E.massyae is caught by coastal trawlers all around the year but mainly in winter and spring in Mar del Plata and Necochea areas. E.megalocyathus is caught by hooks in the intertidal zone and by diving in the subtidal zone, from the North Patagonian gulfs (March to November)to the...
Tipo: Book Section Palavras-chave: Artisanal fishing; Catch/effort; Cephalopod fisheries; Fishery management; Stock assessment; Population structure; Bottom trawling; Fishery management; Stock assessment; Population structure; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 1998 URL: http://hdl.handle.net/1834/2578
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Rapport de campagne sur le N'Diago du 7 au 13 Janvier 1984 OceanDocs
Boukatine, P.; Overko, S.; Tchernichkov, P. P.; Damiano, A..
Tipo: Journal Contribution Palavras-chave: Surveys; Fishing boats; Hydrology; Marine biology; Bottom trawling.
Ano: 1985 URL: http://hdl.handle.net/1834/4677
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Spatio-temporal trends in diversity of demersal fish assemblages in the Mediterranean ArchiMer
Farriols, M. Teresa; Ordines, Francesc; Carbonara, Pierluigi; Casciaro, Loredana; Di Lorenzo, Manfredi; Esteban, Antonio; Follesa, Cristina; García-ruiz, Cristina; Isajlovic, Igor; Jadaud, Angelique; Ligas, Alessandro; Manfredi, Chiara; Marceta, Bojan; Peristeraki, Panagiota; Vrgoc, Nedo; Massutí, Enric.
The high species richness, coupled with high proportion of endemism, makes the Mediterranean one of the world’s ‘biodiversity hotspots’. However, the continuous increase in fisheries in the last few decades has led to the overexploitation of their main commercial stocks. Using fishery-independent data collected under the framework of the MEDITS trawl surveys carried out over the last 20 years, we study the demersal fish diversity pattern in the Mediterranean at a large spatial and temporal scale to determine whether it is being affected by the general fishing overexploitation of the demersal resources. The detected diversity trends are compared with the spatio-temporal variation in bottom trawl fishing effort in the Mediterranean. Our results show a...
Tipo: Text Palavras-chave: Biodiversity; Fish assemblages; MEDITS; Bottom trawling; Fishing effort; Mediterranean Sea.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00584/69628/67484.pdf
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Trawling-induced resuspension and dispersal of muddy sediments and dissolved elements in the Gulf of Lion (NW Mediterranean) ArchiMer
De Madron, X; Ferre, B; Le Corre, Gildas; Grenz, C; Conan, P; Pujo Pay, M; Buscail, R; Bodiot, O.
A dedicated trawling experiment was performed at three sites on the Gulf of Lion continental shelf, with the aim of assessing the resuspension of particulate and dissolved matter triggered by different types of trawls on muddy sediments. The different configurations were: (i) bottom trawl, with bobbin for ground rope (Rockhopper): (ii) bottom trawl, without bobbin (Medits); and (iii) pelagic trawl, towed at 1 and 10m above the seabed. The plumes of resuspended sediment were measured using the acoustic backscattered intensity, from a towed ADCP. Concomitant profiles of particle size-distribution, light transmission and water samples were collected, outside and inside the plumes. The analysis of the data enabled derivation of the major physical and...
Tipo: Text Palavras-chave: Northwestern Mediterranean Sea; Gulf of Lion; Suspended particulate matter; Sediment resuspension; Cohesive sediments; Bottom trawling; Coastal fisheries.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1355.pdf
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Траловый промысел и его влияние на донные биоценозы Черного моря IBSS Repository
Болтачев, А. Р..
Представлены результаты анализа тралового промысла, тактики лова черноморского шпрота и визуальных наблюдений дна с помощью телевизионного робота и водолазов на шельфе Крыма. Установлено, что, несмотря на запрещение, в дневное время лов шпрота осуществляется пелагическими тралами в донном варианте. За тридцать лет тралового промысла в значительной степени пострадали поясные биоценозы мидии и фазеолины, что негативно отразилось на структурных и функциональных характеристиках всей прибрежной экосистемы. В результате сокращения количественных показателей макробентосных животных-фильтраторов, очевидно, значительно снизился уровень естественного биологического самоочищения вод, значимость макробентосных сообществ как важного звена в трофической цепи...
Tipo: Journal Contribution Palavras-chave: Донные траления; Биоценозы мидии и фазеолины; Заиливание; Деградация сообществ; Черное море; Bottom trawling; Mussels and faseoline biocenoses; Silting; Communities degradation; Black Sea Aquatic communities Degradation Silting Bottom trawling Aquatic communities Degradation Silting http://aims.fao.org/aos/agrovoc/c_553 http://aims.fao.org/aos/agrovoc/c_2159 http://aims.fao.org/aos/agrovoc/c_14291.
Ano: 2006 URL: http://repository.ibss.org.ua/dspace/handle/99011/293
Registros recuperados: 10
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