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| Registros recuperados: 36 | |
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| Johnson, Shannon B.; Won, Yong-jin; Harvey, Julio B. J.; Vrijenhoek, Robert C.. |
| Background: The inhabitants of deep-sea hydrothermal vents occupy ephemeral island-like habitats distributed sporadically along tectonic spreading-centers, back-arc basins, and volcanically active seamounts. The majority of vent taxa undergo a pelagic larval phase, and thus varying degrees of geographical subdivision, ranging from no impedance of dispersal to complete isolation, often exist among taxa that span common geomorphological boundaries. Two lineages of Bathymodiolus mussels segregate on either side of the Easter Microplate, a boundary that separates the East Pacific Rise from spreading centers connected to the Pacific-Antarctic Ridge. Results: A recent sample from the northwest flank of the Easter Microplate contained an admixture of northern... |
| Tipo: Text |
Palavras-chave: Bathymodiolus antarcticus n. sp; Hybridization; Recombination; Linkage disequilibrium; Deep-sea; Hydrothermal vent; Bathymodiolus thermophilus. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00185/29626/28000.pdf |
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| Tavares,Marcos; Melo,Gustavo Augusto S. de. |
| A new species of Trichopeltarion A. Milne-Edwards, 1880, is described from off coast of Brazil, namely Trichopeltarion pezzutoi n. sp. The new species is compared to its Atlantic congeners, Trichopeltarion nobile A. Milne-Edwards, 1880, and Trichopeltarion intesi (Crosnier, 1981). The record of T. nobile from Brazil should actually be attributed to T. pezzutoi n. sp. The differences between the genera Trichopeltarion and Peltarion Jacquinot, 1847 are discussed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: West Atlantic; Brazil; Deep-sea; Trichopeltarion; Trachycarcinus; Peltarion. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492005001800001 |
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| Sarrazin, Jozee; Sarradin, Pierre-marie; Buffier, Erick; Christophe, Alain; Clodic, Guillaume; Desbruyeres, Damien; Fouquet, Yves; Gouillou, Michel; Jannez, Michel; Le Fur, Yann; Le Rest, Jacques; Lecornu, Fabrice; Lefort, Olivier; Lux, Stephanie; Millet, Brigitte; Guillemet, Pascal. |
| The Momareto cruise was held from August 6 to September 6, 2006 on the new French oceanographic vessel Pourquoi pas? The ROV Victor 6000 visited three vent fields, ranging from 850m to 2300m, on the Mid-Atlantic Ridge. The scientific objective of the cruise was to study the spatial and temporal dynamics of hydrothermal communities colonizing these active vent sites. Aside scientific and technological objectives, one of the major goals of this cruise was to share the excitement of our science with the public. For this, the results of the project were shared through different media. The most challenging and exciting communication event remains the real-time transmission of images acquired by the ROV Victor at 1700m depth to a 250 person audience on land. |
| Tipo: Text |
Palavras-chave: Deep-sea; Ecosystems; Outreach; Real-time. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3599.pdf |
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| Christensen, Jp. |
| A diagenetic model of porewater O-2 was used to examine the relationship between organic carbon flux to the sediments and benthic oxygen demand (BOD). The model predicted that the organic carbon influx to sediments balances BOD as long as sediments are oxygenated. The critical rate occurs when O-2 at infinite depth disappears. With influxes exceeding the critical rate, the O-2 flux into the sediments via molecular diffusion can not consume all incoming organic matter, and anaerobic conditions result in BOD underestimating the carbon influx. Given that low rates of deep-sea BOD approximate the carbon influx below 9 g.C.m(-2).y(-1), a significant multilinear regression was found between published BOD, primary productivity (P-p, both in g.C.m(-2).y(-1))(,)... |
| Tipo: Text |
Palavras-chave: Fonds marins; Oxygène; Production primaire; Respiration; Sédiments; Deep-sea; Oxygen; Primary productivity; Respiration; Sediments. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00325/43578/44046.pdf |
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| Odisi,Estácio Jussie; Silvestrin,Marcela Bruschi; Takahashi,Rodrigo Yoji Uwamori; da Silva,Marcus Adonai Castro; Lima,André Oliveira de Souza. |
| Background: Cellulases and lipases have broad industrial application, which calls for an urgent exploration of microorganisms from extreme environments as valuable source of commercial enzyme. In this context, the present work describes the bioprospection and identification of deep-sea bacteria that produce cellulases and lipases, as well their optimal temperature of activity. Results: The first step of this study was the screening of cellulolytic and lipolytic deep-sea bacteria from sediment and water column, which was conducted with substrates linked with 4-Methylumbelliferyl. Among the 161 strains evaluated, 40 were cellulolytic, 23 were lipolytic and 5 exhibited both activities. Cellulolytic and lipolytic bacteria are more common in sediment than at... |
| Tipo: Journal article |
Palavras-chave: Bacteria; Cellulases; Deep-sea; Lipases. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500018 |
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| Morato, Telmo; González‐irusta, José‐manuel; Dominguez‐carrió, Carlos; Wei, Chih‐lin; Davies, Andrew; Sweetman, Andrew K.; Taranto, Gerald H.; Beazley, Lindsay; García‐alegre, Ana; Grehan, Anthony; Laffargue, Pascal; Murillo, Francisco Javier; Sacau, Mar; Vaz, Sandrine; Kenchington, Ellen; Arnaud-haond, Sophie; Callery, Oisín; Chimienti, Giovanni; Cordes, Erik; Egilsdottir, Hronn; Freiwald, André; Gasbarro, Ryan; Gutiérrez‐zárate, Cristina; Gianni, Matthew; Gilkinson, Kent; Wareham Hayes, Vonda E.; Hebbeln, Dierk; Hedges, Kevin; Henry, Lea‐anne; Johnson, David; Koen‐alonso, Mariano; Lirette, Cam; Mastrototaro, Francesco; Menot, Lenaick; Molodtsova, Tina; Durán Muñoz, Pablo; Orejas, Covadonga; Pennino, Maria Grazia; Puerta, Patricia; Ragnarsson, Stefán Á.; Ramiro‐sánchez, Berta; Rice, Jake; Rivera, Jesús; Roberts, J. Murray; Ross, Steve W.; Rueda, José L.; Sampaio, Íris; Snelgrove, Paul; Stirling, David; Treble, Margaret A.; Urra, Javier; Vad, Johanne; Oevelen, Dick; Watling, Les; Walkusz, Wojciech; Wienberg, Claudia; Woillez, Mathieu; Levin, Lisa A.; Carreiro‐silva, Marina. |
| The deep sea plays a critical role in global climate regulation through uptake and storage of heat and carbon dioxide. However, this regulating service causes warming, acidification and deoxygenation of deep waters, leading to decreased food availability at the seafloor. These changes and their projections are likely to affect productivity, biodiversity and distributions of deep‐sea fauna, thereby compromising key ecosystem services. Understanding how climate change can lead to shifts in deep‐sea species distributions is critically important in developing management measures. We used environmental niche modelling along with the best available species occurrence data and environmental parameters to model habitat suitability for key cold‐water coral and... |
| Tipo: Text |
Palavras-chave: Climate change; Cold-water corals; Deep-sea; Fisheries; Fishes; Habitat suitability modelling; Octocorals; Scleractinians; Species distribution models; Vulnerable marine ecosystems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00610/72211/71007.pdf |
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| Brandt, Angelika; Gutt, Julian; Hildebrandt, Marc; Pawlowski, Jan; Schwendner, Jakob; Soltwedel, Thomas; Thomsen, Laurenz. |
| Many countries are very active in marine research and operate their own research fleets. In this decade, a number of research vessels have been renewed and equipped with the most modern navigation systems and tools. However, much of the research gear used for biological sampling, especially in the deep-sea, is outdated and dependent on wired operations. The deployment of gear can be very time consuming and, thus, expensive. The present paper reviews wire-dependent, as well as autonomous research gear for biological sampling at the deep seafloor. We describe the requirements that new gear could fulfil, including the improvement of spatial and temporal sampling resolution, increased autonomy, more efficient sample conservation methodologies for morphological... |
| Tipo: Text |
Palavras-chave: Deep-sea; Autonomous sampling devices; Sampling efficiency; Benthic research; Wire times; Robotics. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00335/44589/44306.pdf |
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| Russell, Ra; Serafy, J. |
| The numbers of fish caught and photographed in the eastern North Atlantic (49-52°N and 10-15°W) were compared from 46 hauts, made between 1979 and 1983 using an epibenthic sledge with an ancillary camera. There were 1966 specimens captured and 258 photographed. Fish species of similar appearance were grouped to aid identification from photographs. The 20 speciesjgroups common to both gears were represented by 83.6% of the specimens captured. Although there was good correlation between the numbers, catch density was about one third of that photographed, demonstrating how much such estimates may be at variance. Larger species showed a greater discrepancy, to suggest net avoidance. A bow-wave might sweep aside less active animais. The camera also demonstrated... |
| Tipo: Text |
Palavras-chave: Benthos; Faune démersale; Densité de poissons; Photographies; Deep-sea; Demersal fish; Fish densities; Photographs. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00110/22107/19746.pdf |
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| Cailliet, Gm; Andrews, Ah; Wakefield, Ww; Moreno, G; Rhodes, Kl. |
| Beam trawl, camera sled and submersible data from 2 000-3 300 m off central California produced similar fish faunal composition, but different density estimates. All species caught in trawls were observed in camera-sled and submersible observations. However, some rare species that were observed were not caught in trawls. The fish fauna was dominated by the families Macrouridae, Zoarcidae, Moridae, and Rajidae. Fishes both trawled and observed were the macrourids Coryphaenoides armatus, C. filifer and C. leptolepis; the zoarcids Bothrocara spp., Pachycara lepinium and Lycenchelys spp.; the morid Antimora microlepis; the rajid Bathyraja trachura, the ophidiid Spectrunculus grandis, and the liparidid Careproctus ovigerum. One unidentified liparidid... |
| Tipo: Text |
Palavras-chave: Benthos; Poisson; Habitat; Chalutage; Submersible; Deep-sea; Fishes; Habitat; Sampling; Submersibles. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00325/43583/44022.pdf |
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| Soltwedel, T; Von Juterzenka, K; Premke, K; Klages, M. |
| Although the use of deep-sea imagery considerably increased during the last decades, reports on nekton falls to the deep seafloor are very scarce. Whereas there are a few reports describing the finding of whale carcasses in the deep north-eastern and south-eastern Pacific, descriptions of invertebrate or vertebrate food-falls at centimetre to metre scale are extremely rare. After 4 years of extensive work at a deep-sea long-term station in northern polar regions (AWI-"Hausgarten"), including large-scale visual observations with various camera systems covering some 10 000 m(2) of seafloor at water depths between 1250 and 5600 m, this paper describes the first observation of a fish carcass at about 1280 m water depth, west off Svalbard. The fish skeleton had... |
| Tipo: Text |
Palavras-chave: Chute; Carcasses; Océan profond; Imagerie; Nécrophage; Food-falls; Carcasses; Deep-sea; Imagery; Scavengers. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43253/42984.pdf |
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| Puerta, Patricia; Johnson, Clare; Carreiro-silva, Marina; Henry, Lea-anne; Kenchington, Ellen; Morato, Telmo; Kazanidis, Georgios; Luis Rueda, Jose; Urra, Javier; Ross, Steve; Wei, Chih-lin; Manuel Gonzalez-irusta, Jose; Arnaud-haond, Sophie; Orejas, Covadonga. |
| Circulation patterns in the North Atlantic Ocean have changed and re-organized multiple times over millions of years, influencing the biodiversity, distribution, and connectivity patterns of deep-sea species and ecosystems. In this study, we review the effects of the water mass properties (temperature, salinity, food supply, carbonate chemistry, and oxygen) on deep-sea benthic megafauna (from species to community level) and discussed in future scenarios of climate change. We focus on the key oceanic controls on deep-sea megafauna biodiversity and biogeography patterns. We place particular attention on cold-water corals and sponges, as these are ecosystem-engineering organisms that constitute vulnerable marine ecosystems (VME) with high associated... |
| Tipo: Text |
Palavras-chave: North Atlantic; Deep-sea; Biodiversity; Biogeography; Water masses; Vulnerable marine ecosystems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00628/74006/73330.pdf |
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| Moura, Teresa; Jones, Emma; Clarke, Maurice W.; Cotton, Charles F.; Crozier, Paul; Daley, Ross K.; Diez, Guzman; Dobby, Helen; Dyb, Jan E.; Fossen, Inge; Irvine, Sarah B.; Jakobsdottir, Klara; Lopez-abellan, Luis J.; Lorance, Pascal; Pascual-alayon, Pedro; Severino, Ricardo B.; Figueiredo, Ivone. |
| Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species reproductive spatial dynamics. This study draws together information on the distribution of reproductive stages of three species of squaliform sharks: Portuguese dogfish Centroscymnus coelolepis (Somniosidae), leafscale gulper shark Centrophorus squamosus (Centrophoridae) and birdbeak dogfish Deania calcea (Centrophoridae), gathering data from several geographical areas from the Atlantic, Indian and Pacific Oceans. For each species we analysed the sex ratio and the... |
| Tipo: Text |
Palavras-chave: Commercial fishery data; Deep-sea; Life stage; Population structure; Survey data. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00188/29902/29420.pdf |
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| Pethybridge, H.; Daley, R.; Virtue, P.; Butler, E. C. V.; Cossa, Daniel; Nichols, P. D.. |
| Total mercury (Hg) concentrations and lipid composition data, including fatty acid profiles, for 61 midtrophic species (fish, cephalopods, crustaceans) collected from continental slope waters off south-east Australia were examined. Overall, Hg concentrations were greatest in fish (0.01-0.30 mu g g(-1) ww) (with highest content found in barracouta (Thyrsites atun) and whiptails (Coelorinchus fasciatus)), compared with cephalopods (0.01 and 0.17 mu g g(-1) ww) and crustaceans (<0.04 mu g g(-1) ww). Lipid composition varied between species and within habitat (mesopelagic, bathypelagic and benthic). Mean total lipid content ranged from 0.5 to 13.2% ww, and in most species was dominated by triacylglycerols and phospholipids. In fish and squid, fatty acids... |
| Tipo: Text |
Palavras-chave: Deep-sea; Ecosystem dynamics; Fatty acids; Lipids; Mercury; Mid-trophic prey; Mid-water. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00016/12685/9655.pdf |
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| Registros recuperados: 36 | |
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