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| García-ruiz, Cristina; Hidalgo, Manuel; Carpentieri, Paolo; Fernandez-arcaya, Ulla; Gaudio, Palma; González, Maria; Jadaud, Angelique; Mulas, Antonello; Peristeraki, Panagiota; Rueda, José Luis; Vitale, Sergio; D’onghia, Gianfranco. |
| The present study describes for the first time the spatial distribution of five macrourid species throughout the Mediterranean Sea and analyses depth, geographical and time-related trends regarding their abundance, biomass and mean fish weight. The data were collected as part of the MEDITS annual bottom trawl survey carried out by several European Mediterranean countries from 1994 to 2015, using the same standardized gear and sampling protocol. The most represented species in terms of abundance and biomass was Coelorinchus caelorhincus. The bathymetric trend was different for each species. The shallowest occurring species was C. caelorhincus, followed by Hymenocephalus italicus and Nezumia sclerorhynchus, while Nezumia aequalis and Trachyrincus scabrus... |
| Tipo: Text |
Palavras-chave: Macrourids; Mediterranean; Bathymetric distribution; Geographic distribution; Spatio-temporal trends; Deep-sea; Trawl survey. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60057/63337.pdf |
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| Fernandez-arcaya, Ulla; Bitetto, Isabella; Esteban, Antonio; Farriols, M. Teresa; García-ruiz, Cristina; Gil De Sola, Luis; Guijarro, Beatriz; Jadaud, Angelique; Kavadas, Stefanos; Lembo, Giuseppe; Milisenda, Giacomo; Maina, Irida; Petovic, Slavica; Sion, Letizia; Vaz, Sandrine; Massutí, Enric. |
| The large-scale distribution pattern of megafauna communities along the Mediterranean middle slope was explored. The study was conducted between 500 and 800 m depth where deep-water fishery occurs. Although community studies carried out deeper than 500 m are partly available for some geographic areas, few large-scale comparative studies have been carried out. Within the framework of the MEDITS survey programme, we compared the megafauna community structure in ten geographical sub-areas (GSAs) along the Mediterranean coasts. Additionally, the spatial distribution of fishing was analysed using vessel monitoring by satellite information. Overall, the community showed a significant difference between sub-areas, with a decreasing eastward pattern in abundance... |
| Tipo: Text |
Palavras-chave: Distribution pattern; Fishing impact; Continental slope; Deep sea; Megafauna; Red shrimp; Community. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00489/60051/63328.pdf |
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| Fernandez-arcaya, Ulla; Ramirez-llodra, Eva; Aguzzi, Jacopo; Allcock, A. Louise; Davies, Jaime S.; Dissanayake, Awantha; Harris, Peter; Howell, Kerry; Huvenne, Veerle A.i.; Macmillan-lawler, Miles; Martín, Jacobo; Menot, Lenaick; Nizinski, Martha; Puig, Pere; Rowden, Ashley A.; Sanchez, Florence; Van Den Beld, Inge. |
| Submarine canyons are major geomorphic features of continental margins around the world. Several recent multidisciplinary projects focused on the study of canyons have considerably increased our understanding of their ecological role, the goods, and services they provide to human populations, and the impacts that human activities have on their overall ecological condition. Pressures from human activities include fishing, dumping of land-based mine tailings, and oil and gas extraction. Moreover, hydrodynamic processes of canyons enhance the down-canyon transport of litter. The effects of climate change may modify the intensity of currents. This potential hydrographic change is predicted to impact the structure and functioning of canyon communities as well... |
| Tipo: Text |
Palavras-chave: Submarine canyons; Ecosystem service; Anthropogenic impacts; Conservation; Management. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00369/48059/48147.pdf |
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| Matabos, Marjolaine; Hoeberechts, Maia; Doya, Carol; Aguzzi, Jacopo; Nephin, Jessica; Reimchen, Thomas E.; Leaver, Steve; Marx, Roswitha M.; Albu, Alexandra Branzan; Fier, Ryan; Fernandez-arcaya, Ulla; Juniper, S. Kim. |
| 1.Recent technological development has increased our capacity to study the deep sea and the marine benthic realm, particularly with the development of multidisciplinary seafloor observatories. Since 2006, Ocean Networks Canada cabled observatories, have acquired nearly 65 TB and over 90,000 hours of video data from seafloor cameras and Remotely Operated Vehicles (ROVs). Manual processing of these data is time-consuming and highly labour-intensive, and cannot be comprehensively undertaken by individual researchers. These videos are a crucial source of information for assessing natural variability and ecosystem responses to increasing human activity in the deep sea. 2.We compared the performance of three groups of humans and one computer vision algorithm in... |
| Tipo: Text |
Palavras-chave: Computer vision algorithms; Crowdsourcing; Deep-sea imagery; Digital Fishers; Fish counting; OceanNetworks Canada; Seafloor observatories; Underwater video. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00369/47978/48006.pdf |
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