scholarly journals The Rockall Trough, Northeast Atlantic: the Cradle of Deep-sea Biological Oceanography that is Now Being Subjected to Unsustainable Fishing Activity

2003 ◽  
Vol 31 ◽  
pp. 57-83 ◽  
Author(s):  
J D M Gordon
Keyword(s):  
Deep Sea ◽  
Fishing Activity ◽  
Northeast Atlantic ◽  
Biological Oceanography ◽  
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.

scholarly journals Winter migration and diving behaviour of porbeagle shark, Lamna nasus, in the Northeast Atlantic

2010 ◽  
Vol 68 (1) ◽  
pp. 166-174 ◽  
Author(s):  
Ryan A. Saunders ◽  
François Royer ◽  
Maurice W. Clarke
Keyword(s):  
Spatial Ecology ◽  
Large Scale ◽  
Depth Distribution ◽  
Diving Behaviour ◽  
Depth Range ◽  
Bay Of Biscay ◽  
Night Time ◽  
Fishing Activity ◽  
Northeast Atlantic ◽  
Winter Migration

Abstract Saunders, R. A., Royer, F., and Clarke, M. W. 2011. Winter migration and diving behaviour of porbeagle shark, Lamna nasus, in the Northeast Atlantic. – ICES Journal of Marine Science, 68: 166–174. The porbeagle is one of the top marine predators in the North Atlantic. However, little is known about its biology, abundance, or spatial ecology there. Results are presented on the migration and behaviour of three porbeagles tagged with archival pop-up tags off Ireland between September 2008 and January 2009. One shark migrated >2400 km to the northwest of Morocco, residing around the Bay of Biscay for approximately 30 days. The other two remained more localized in off-shelf regions around the Celtic Sea/Bay of Biscay and off western Ireland. The sharks occupied a broad vertical depth range (0–700 m) and a relatively limited temperature range (∼9–17°C), with notable variations in diving behaviour between individual sharks. There were distinct day–night differences in depth distribution, each shark being positioned higher in the water column by night than by day. Night-time depth distribution also appeared to be driven by the lunar cycle during broad-scale migration through oceanic waters. Our results show that porbeagles occupy and traverse regions of high fishing activity where they are potentially vulnerable to population depletion. Such large-scale movement outside the ICES Area underlines the need for international coordination in their assessment and management.

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

Reproductive strategies and diet in deep-sea nuculanid protobranchs (Bivalvia: Nuculoidea) from the Rockall Trough

1992 ◽  
Vol 114 (4) ◽  
pp. 571-580 ◽  
Author(s):  
P. A. Tyler ◽  
R. Harvey ◽  
L. A. Giles ◽  
J. D. Gage
Keyword(s):  
Deep Sea ◽  
Reproductive Strategies ◽  
Rockall Trough
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