An association between Exspina typica Lang (Tanaidacea) and deep-sea holothurians

1987 ◽  
Vol 67 (1) ◽  
pp. 11-15 ◽  
Author(s):  
Michael H. ◽  
Thurston D. S. M. ◽  
Billett-Al ◽  
Elizabeth Hassack
Keyword(s):  
Deep Sea ◽  
Cold Water

First reports of the association between Exspina typica and three species of abyssal holothurian are presented. These records suggest that the association is a real one, and not an artefact of sampling, but throw no light on the nature of the association. The geographic and bathymetric distributions of E. typica are summarized, and the species is shown to be a widely distributed cold water stenotherm.

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 Megafaunal composition of cold-water corals and other deep-sea benthos in the southern Emperor Seamounts area, North Pacific Ocean

2017 ◽  
Vol 19 (1) ◽  
pp. 19-30 ◽  
Author(s):  
Mai MIYAMOTO ◽  
Masashi KIYOTA ◽  
Takeshi HAYASHIBARA ◽  
Masanori NONAKA ◽  
Yukimitsu IMAHARA ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North Pacific ◽  
Deep Sea ◽  
Cold Water ◽  
North Pacific Ocean ◽  
Emperor Seamounts ◽  
Area North

scholarly journals Ashinkailepas kermadecensis, a new species of deep-sea scalpelliform barnacle (Thoracica: Eolepadidae) from the Kermadec Islands, southwest Pacific

Zootaxa ◽  
2009 ◽  
Vol 2021 (1) ◽  
pp. 57-65 ◽  
Author(s):  
JOHN S. BUCKERIDGE
Keyword(s):  
New Species ◽  
New Zealand ◽  
Deep Sea ◽  
Cold Water ◽  
The Other ◽  
Cold Seeps ◽  
Central Japan ◽  
Southwest Pacific ◽  
The North ◽  
A New Species

A new deep-sea stalked barnacle, Ashinkailepas kermadecensis sp. nov. has been recovered from a cold-water seep at depths of 1165 metres in the vicinity of the Kermadec Ridge to the northeast of the North Island, New Zealand. There are now two species of Ashinkailepas—the other, Ashinkailepas seepiophila Yamaguchi, Newman & Hashimoto, 2004, occurs in deep, cold seeps off central Japan. As there are two species within Ashinkailepas, formal diagnoses are provided for both taxa.

scholarly journals Deep-sea sponge grounds as nutrient sinks: denitrification is common in boreo-Arctic sponges

2020 ◽  
Vol 17 (5) ◽  
pp. 1231-1245 ◽  
Author(s):  
Christine Rooks ◽  
James Kar-Hei Fang ◽  
Pål Tore Mørkved ◽  
Rui Zhao ◽  
Hans Tore Rapp ◽  
...  
Keyword(s):  
Deep Sea ◽  
Cold Water ◽  
Marine Ecosystem ◽  
Sponge Species ◽  
Lag Phase ◽  
Sponge Tissue ◽  
Ammonium Oxidation ◽  
Genes Encoding ◽  
Key Enzyme ◽  
Nutrient Sinks

Abstract. Sponges are commonly known as general nutrient providers for the marine ecosystem, recycling organic matter into various forms of bioavailable nutrients such as ammonium and nitrate. In this study we challenge this view. We show that nutrient removal through microbial denitrification is a common feature in six cold-water sponge species from boreal and Arctic sponge grounds. Denitrification rates were quantified by incubating sponge tissue sections with 15NO3--amended oxygen-saturated seawater, mimicking conditions in pumping sponges, and de-oxygenated seawater, mimicking non-pumping sponges. It was not possible to detect any rates of anaerobic ammonium oxidation (anammox) using incubations with 15NH4+. Denitrification rates of the different sponge species ranged from below detection to 97 nmol N cm−3 sponge d−1 under oxic conditions, and from 24 to 279 nmol N cm−3 sponge d−1 under anoxic conditions. A positive relationship between the highest potential rates of denitrification (in the absence of oxygen) and the species-specific abundances of nirS and nirK genes encoding nitrite reductase, a key enzyme for denitrification, suggests that the denitrifying community in these sponge species is active and prepared for denitrification. The lack of a lag phase in the linear accumulation of the 15N-labelled N2 gas in any of our tissue incubations is another indicator for an active community of denitrifiers in the investigated sponge species. Low rates for coupled nitrification–denitrification indicate that also under oxic conditions, the nitrate used to fuel denitrification rates was derived rather from the ambient seawater than from sponge nitrification. The lack of nifH genes encoding nitrogenase, the key enzyme for nitrogen fixation, shows that the nitrogen cycle is not closed in the sponge grounds. The denitrified nitrogen, no matter its origin, is then no longer available as a nutrient for the marine ecosystem. These results suggest a high potential denitrification capacity of deep-sea sponge grounds based on typical sponge biomass on boreal and Arctic sponge grounds, with areal denitrification rates of 0.6 mmol N m−2 d−1 assuming non-pumping sponges and still 0.3 mmol N m−2 d−1 assuming pumping sponges. This is well within the range of denitrification rates of continental shelf sediments. Anthropogenic impact and global change processes affecting the sponge redox state may thus lead to deep-sea sponge grounds changing their role in marine ecosystem from being mainly nutrient sources to becoming mainly nutrient sinks.

A new species of deep-sea Dendronotus Alder & Hancock (Mollusca:Nudibranchia) from California, with an expanded phylogeny of the genus

2011 ◽  
Vol 25 (1) ◽  
pp. 60 ◽  
Author(s):  
Carla C. Stout ◽  
Nerida G. Wilson ◽  
Ángel Valdés
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Cold Water ◽  
Sequence Data ◽  
Sister Group ◽  
Well Differentiated ◽  
Pacific Species ◽  
A New Species ◽  
Water Species ◽  
Cold Water Species

Dendronotus patricki, sp. nov. is a new species collected from a whalefall in the Monterey Canyon, California. This new species is characterised by having a small number of dorsal appendages compared with similarly sized species of Dendronotus Alder & Hancock, 1845. Anatomically, D. patricki, sp. nov. has a small prostate with just a few alveoli, a very small seminal receptacle situated near the distal end of the vagina, and a relatively short and small ampulla. The rachidian radular teeth of D. patricki, sp. nov. are unique among Dendronotus as they have a well differentiated, conical cusp with very small denticles on either side, but most denticles are located on the sides of the teeth, rather than on the sides of the cusp. Dendronotus patricki, sp. nov., is genetically distinct from other species of Dendronotus for which sequence data are available. A phylogenetic analysis of Dendronotus based on COI, 16S, and H3 sequence data reveals that D. patricki, sp. nov. forms a polytomy with Dendronotus orientalis (Baba, 1932) and a clade of the shallow temperate and cold water species. The tropical Indo-Pacific species D. regius Pola & Stout, 2008 is the sister group to all other Dendronotus species.

New species and records of Newtoniellinae (Caenogastropoda, Newtoniellidae) from Brazil

2015 ◽  
Vol 95 (4) ◽  
pp. 791-804 ◽  
Author(s):  
Maurício R. Fernandes ◽  
Raquel Garofalo ◽  
Alexandre D. Pimenta
Keyword(s):  
New Species ◽  
Deep Sea ◽  
New Records ◽  
Cold Water ◽  
Present Contribution ◽  
Western Atlantic ◽  
South Eastern ◽  
Two New Species ◽  
Eastern Usa ◽  
A New Species

Newtoniellinae is a worldwide marine group of cold-water, deep-sea species, comprising the genera Cerithiella, Paramendax and Trituba. Prior to this study, the subfamily was represented in Brazil by four species of Cerithiella. The present contribution adds new Brazilian records of two of these species, Cerithiella amblytera and Cerithiella enode, in addition to new records of two species previously known only from Cuba and the south-eastern USA, respectively: Cerithiella sigsbeana comb. nov. and Cerithiella producta. Two new species of Cerithiella from Brazil are described: Cerithiella atali sp. nov. has a pointed protoconch identical to the species described in the previously synonymized genus Stilus; Cerithiella candela sp. nov. has the teleoconch very similar to Cerithiella pernambucoensis, but is differentiated by the protoconch morphology. Also, a new species of Trituba is described, Trituba anubis sp. nov., which is the second species of this genus recorded for the western Atlantic. Eumetula axicostulata comb. nov. and Eumetula vitrea comb. nov., both from the western Atlantic but not recorded from Brazil, are transferred from the genus Cerithiella. This study increases from four to nine the number of known species of Newtoniellinae from Brazil.

Investigation of trophic ecology in Newfoundland cold-water deep-sea corals using lipid class and fatty acid analyses

Coral Reefs ◽  
2017 ◽  
Vol 37 (1) ◽  
pp. 157-171 ◽  
Author(s):  
Flora Salvo ◽  
Dounia Hamoutene ◽  
Vonda E. Wareham Hayes ◽  
Evan N. Edinger ◽  
Christopher C. Parrish
Keyword(s):  
Fatty Acid ◽  
Lipid Class ◽  
Deep Sea ◽  
Trophic Ecology ◽  
Cold Water ◽  
Deep Sea Corals

Effects of deep-sea bottom longlining on the Hatton Bank fish communities and benthic ecosystem, north-east Atlantic

2010 ◽  
Vol 91 (4) ◽  
pp. 939-952 ◽  
Author(s):  
P. Durán Muñoz ◽  
F.J. Murillo ◽  
M. Sayago-Gil ◽  
A. Serrano ◽  
M. Laporta ◽  
...  
Keyword(s):  
Deep Water ◽  
Deep Sea ◽  
Cold Water ◽  
Fish Communities ◽  
East Atlantic ◽  
North East ◽  
Sea Bottom ◽  
Rocky Outcrop ◽  
Area North ◽  
By Catch

The effects of deep-sea bottom longlining on fish communities and the benthic ecosystem, as well as the interactions between fishing and seabirds, were studied based on data collected from a joint collaboration between the Spanish Institute of Oceanography and a longliner, carried out on the Hatton Bank area (north-east Atlantic) in 2008. A total of 38 longline sets were distributed mainly along the rugged bottom of the rocky outcrop at depths ranging from 750 to 1500 m. Deep-water sharks and lotids were predominant in the catches contributing respectively 80.4% and 13.1% in terms of weight. Deep-water sharks were predominant in the discards. By-catch of cold-water corals and small glass sponges occurred along the western flank of the Hatton Bank, while large hexactinellids were found along the eastern flank. Longlines fished the adult fraction of vulnerable deep-water sharks and lotids. High catches per unit effort values for these species were obtained in coral areas. A combination of seabird-scaring streamer lines and other measures of preventing seabird by-catch were used. Only one fulmar was captured and it survived. Data on distribution of marine litter and derelict deep-sea gillnets are also presented.

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