A Comparison of the Biodiversity of Deep-Sea Marine Nematodes from Three Stations in the Rockall Trough, Northeast Atlantic, and One Station in the San Diego Trough, Northeast Pacific

1994 ◽  
Vol 2 (4) ◽  
pp. 95 ◽  
Author(s):  
P. J. D. Lambshead ◽  
B. J. Elce ◽  
D. Thistle ◽  
J. E. Eckman ◽  
P. R. O. Barnett
Keyword(s):  
Deep Sea ◽  
San Diego ◽  
Marine Nematodes ◽  
Northeast Atlantic ◽  
Northeast Pacific ◽  
Rockall Trough

Benthic hydroids (Cnidaria, Hydrozoa) from bathyal and abyssal depths of the Northeast Atlantic held in the modern Discovery Collections

Zootaxa ◽  
2017 ◽  
Vol 4347 (1) ◽  
pp. 1 ◽  
Author(s):  
ÁLVARO L. PEÑA CANTERO ◽  
TAMMY HORTON
Keyword(s):  
Deep Sea ◽  
Single Species ◽  
Abyssal Plain ◽  
Generic Level ◽  
Northeast Atlantic ◽  
Porcupine Seabight ◽  
North East ◽  
The North ◽  
Rockall Trough ◽  
Mid Atlantic Ridge

The deep-sea benthic hydroid fauna remains poorly known, in part because of less frequent sampling than the shelf fauna, in part owing to the immense study area, and partly also because available samples have been little studied by experts. In order to correct this, deep-sea benthic hydroid material from the modern Discovery Collections has been studied. Samples come from localities in the North-East Atlantic including the Porcupine Seabight, Porcupine Abyssal Plain, Rockall Trough, Rockall Bank, and the Mid-Atlantic Ridge. Sixteen species belonging to 12 families and 16 genera were found. Leptothecata are clearly dominant, being represented by 14 species; the remaining species belong to Anthoathecata. Lafoeidae and Tiarannidae are the most diverse families with three species each; the remaining families being represented by a single species. The low species diversity is remarkable at the generic level, with each genus being represented by a single species. Hydroid occurrence is low: twelve species were found in ≤ 9% of stations; Amphinema biscayana has the highest occurrence (27% of stations). Fifteen species were recorded in the Porcupine Seabight, two in the Rockall Trough, one at Rockall Bank, one on the Porcupine Abyssal Plain, and two at the Mid-Atlantic Ridge. The known bathymetric range for a third of the species is extended; the increase is particularly noteworthy in Amphinema biscayana, Acryptolaria crassicaulis, Clytia gigantea and Schizotricha profunda. Two distinct bathymetric groups are recognized: strictly deep-sea inhabitants and eurybathic species. Most species are globally distributed, some are widely distributed in the Atlantic, and others are limited to the North Atlantic or the Northeast Atlantic. 

The Reproductive Biology of Ophiacantha Bidentata (Echinodermata: Ophiuroidea) From The Rockall Trough

1982 ◽  
Vol 62 (1) ◽  
pp. 45-55 ◽  
Author(s):  
P. A. Tyler ◽  
J. D. Gage
Keyword(s):  
Reproductive Biology ◽  
Deep Water ◽  
Larval Stage ◽  
North Pacific ◽  
Deep Sea ◽  
Direct Development ◽  
The Arctic ◽  
Shallow Waters ◽  
Arctic Seas ◽  
Rockall Trough

INTRODUCTIONOphiacantha bidentata (Retzius) is a widespread arctic-boreal ophiuroid with a circumpolar distribution in the shallow waters of the Arctic seas and penetrating into the deep sea of the.North Atlantic and North Pacific (Mortensen, 1927, 1933a; D'yakonov, 1954). Early observations of this species were confined to defining zoogeo-graphical and taxonomic criteria including the separation of deep water specimens as the variety fraterna (Farran, 1912; Grieg, 1921; Mortensen, 1933a). Mortensen (1910) and Thorson (1936, pp. 18–26) noted the large eggs (o.8 mm diameter) in specimens from Greenland and Thorson (1936) proposed that this species had ‘big eggs rich in yolk, shed directly into the sea. Much reduced larval stage or direct development’. This evidence is supported by observations of O. bidentata from the White and Barents Seas (Semenova, Mileikovsky & Nesis, 1964; Kaufman, 1974)..

scholarly journals Seabed mapping for selecting cold-water coral protection areas on Hatton Bank, Northeast Atlantic

2009 ◽  
Vol 66 (9) ◽  
pp. 2013-2025 ◽  
Author(s):  
P. Durán Muñoz ◽  
M. Sayago-Gil ◽  
J. Cristobo ◽  
S. Parra ◽  
A. Serrano ◽  
...  
Keyword(s):  
Deep Sea ◽  
Ad Hoc ◽  
Cold Water ◽  
Interdisciplinary Approach ◽  
Western Slope ◽  
Northeast Atlantic ◽  
Fisheries Science ◽  
Seabed Mapping ◽  
Del Rio ◽  
Water Coral

Abstract Durán Muñoz, P., Sayago-Gil, M., Cristobo, J., Parra, S., Serrano, A., Díaz del Rio, V., Patrocinio, T., Sacau, M., Murillo, F. J., Palomino, D., and Fernández-Salas, L. M. 2009. Seabed mapping for selecting cold-water coral protection areas on Hatton Bank, Northeast Atlantic. – ICES Journal of Marine Science, 66: 2013–2025. Research into vulnerable marine ecosystems (VMEs) on the high seas and the impacts of bottom fishing and ad hoc management measures are high priority today thanks to UN General Assembly Resolution 61/105. An interdisciplinary methodology (specifically designed for selecting cold-water coral protection areas) and a case study focused on the Hatton Bank (NE Atlantic) are presented. This interdisciplinary approach, developed under the ECOVUL/ARPA project, was based on conventional fisheries science, geomorphology, benthic ecology, and sedimentology. It contributes to defining practical criteria for identifying VMEs, to improving knowledge of their distribution off Europe's continental shelf, and to providing advice on negative fishing impacts and habitat protection. The approach was used to identify the bottom-trawl deep-sea fishery footprint on the western slope of Hatton Bank, to map the main fishing grounds and related deep-sea habitats (1000–1500 m deep), and to study the interactions between fisheries and cold-water corals. The results lead to a proposal to close the outcrop area (4645 km2) located on the western slope of Hatton Bank as a conservation measure for cold-water corals.

Five new deep-sea species of nudibranchs (Gastropoda: Heterobranchia: Cladobranchia) from the Northeast Pacific

Zootaxa ◽  
2018 ◽  
Vol 4526 (4) ◽  
pp. 401 ◽  
Author(s):  
ÁNGEL VALDÉS ◽  
LONNY LUNDSTEN ◽  
NERIDA G. WILSON
Keyword(s):  
Climate Change ◽  
New Species ◽  
Deep Sea ◽  
Undescribed Species ◽  
Invertebrate Community ◽  
Nuclear Markers ◽  
Mitochondrial Coi ◽  
Northeast Pacific ◽  
Northeastern Pacific ◽  
System Information

Increased exploration of northeastern Pacific deep-sea habitats has revealed a diverse and often poorly-known invertebrate community, including a number of undescribed species of nudibranchs studied herein. We used morphology to distinguish several new species from their congeners, and generated data where possible for mitochondrial (COI, 16S) and nuclear markers (H3) to place them in a phylogenetic context. We described here Tritonia nigritigris sp. nov., Dendronotus claguei sp. nov., Ziminella vrijenhoeki sp. nov., Cuthona methana sp. nov., Aeolidia libitinaria sp. nov. and redescribed Zeusia herculea (Bergh, 1894). Another species of Tritonia is described but not named due to the absence of reproductive system information. Although there are difficulties in collection from deep-sea habitats, only two of our new species are known from single specimens. As with many other deep-sea regions, we expect the number of new species from this region to increase with further exploration. Because the deep regions of the northeast Pacific are particularly vulnerable to the effects of decreasing oxygenation due to climate change, we consider that documenting this fauna has some level of urgency. 

Biogenic carbonate and ice-rafted debris (Heinrich layer) accumulation in deep-sea sediments from a Northeast Atlantic piston core

1996 ◽  
Vol 131 (1-2) ◽  
pp. 21-46 ◽  
Author(s):  
Shirley A. van Kreveld ◽  
Michael Knappertsbusch ◽  
Janneke Ottens ◽  
Gerald M. Ganssen ◽  
Jan E. van Hinte
Keyword(s):  
Deep Sea ◽  
Piston Core ◽  
Northeast Atlantic ◽  
Biogenic Carbonate ◽  
Deep Sea Sediments
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