Exploratory deep-sea fishing in the Falkland Islands, south-western Atlantic

1996 ◽  
Vol 49 (sa) ◽  
pp. 298-310 ◽  
Author(s):  
R. A. Coggan ◽  
C. P. Nolan ◽  
M. J. A. George
Keyword(s):  
Deep Sea ◽  
Falkland Islands ◽  
Western Atlantic

Deep-Sea Faunal Zonation of Benthos along Beaufort-Bermuda Transect in the North-western Atlantic

1972 ◽  
Vol 73 ◽  
pp. 183-194 ◽  
Author(s):  
Robert Y. George ◽  
Robert J. Menzies
Keyword(s):  
Deep Sea ◽  
Abiotic Factors ◽  
Global Scale ◽  
Species Level ◽  
Red Clay ◽  
Generic Level ◽  
Western Atlantic ◽  
The North ◽  
Shelf Slope ◽  
Abyssal Zone

SynopsisIn this paper the subject of faunal zonation in the ocean floor from the intertidal, and over the continental shelf, slope and rise and to the abyssal plain is examined on the basis of faunal change at the generic and species level. The region investigated over a period of five years aboard R/V Eastward is a Beaufort-Bermuda transect, approximately 75 kilometres wide and 500 kilometres long and bounded between 32° and 36°N latitude and 64° and 79°W longitude. A new method, involving numerical indices reflecting changes in the composition of taxa, endemism and diversity between adjacent depth levels, was developed for defining faunal boundaries. Isotherms and isobaths utilised by earlier authors for characterising deep-sea boundary on a global scale do not coincide with natural faunal boundaries. This study analyses the vertical distribution of 128 species of isopod crustaceans and 28 species of large epibenthic invertebrates. The zonation patterns seem to correspond with correlations in environmental conditions such as currents, topography and sediments.We suggest four major vertical faunal provinces, characterised at the generic level, namely (1) the Intertidal Faunal Province; (2) the Shelf Faunal Province; (3) the Archibenthal Zone of Transition; and (4) the Abyssal Faunal Province and internal zones within these characterised at the species level. The main aspects of interest include the presence of a narrow ‘meso abyssal zone’ with a species maximum, the demonstration of the true transitional nature of the Archibenthal Zone in biotic and abiotic factors and the characteristic low-biomass Red Clay environment showing definite faunal isolation from the continental margin.

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.

scholarly journals Lionfish (Pterois sp.) invade the upper bathyal zone in the western Atlantic

2017 ◽  
Author(s):  
Erika Gress ◽  
Dominic A Andradi-Brown ◽  
Lucy Woodall ◽  
Pamela J Schofield ◽  
Karl Stanley ◽  
...  
Keyword(s):  
Deep Sea ◽  
Maximum Depth ◽  
Depth Range ◽  
Western Atlantic ◽  
Invasive Lionfish ◽  
Reef Health

Non-native lionfish have been widely recorded throughout the western Atlantic on both shallow and mesophotic reefs, where they have been linked to declines in reef health. In this study we report the first lionfish observations from the deep sea (>200 m) in Bermuda and Roatan, Honduras, with lionfish observed to a maximum depth of 304 m off the Bermuda platform, and 250 m off West End, Roatan. Placed in the context of other deeper lionfish observations and records, our results imply that lionfish may be found more widely in the 200-300 m depth range of the upper bathyal zone across the western Atlantic, but currently are under sampled compared to shallow habitats. We highlight the need for considering deep-sea lionfish populations in future invasive lionfish management.

scholarly journals Lionfish (Pterois sp.) invade the upper bathyal zone in the western Atlantic

2017 ◽  
Author(s):  
Erika Gress ◽  
Dominic A Andradi-Brown ◽  
Lucy Woodall ◽  
Pamela J Schofield ◽  
Karl Stanley ◽  
...  
Keyword(s):  
Deep Sea ◽  
Maximum Depth ◽  
Depth Range ◽  
Western Atlantic ◽  
Invasive Lionfish ◽  
Reef Health

Non-native lionfish have been widely recorded throughout the western Atlantic on both shallow and mesophotic reefs, where they have been linked to declines in reef health. In this study we report the first lionfish observations from the deep sea (>200 m) in Bermuda and Roatan, Honduras, with lionfish observed to a maximum depth of 304 m off the Bermuda platform, and 250 m off West End, Roatan. Placed in the context of other deeper lionfish observations and records, our results imply that lionfish may be found more widely in the 200-300 m depth range of the upper bathyal zone across the western Atlantic, but currently are under sampled compared to shallow habitats. We highlight the need for considering deep-sea lionfish populations in future invasive lionfish management.

Deep seaYoldiella(Pelecypoda: Protobranchia: Yoldiidae) from Campos Basin, Rio de Janeiro, Brazil

2010 ◽  
Vol 91 (2) ◽  
pp. 513-529 ◽  
Author(s):  
Natalia Pereira Benaim ◽  
Ricardo Silva Absalão
Keyword(s):  
Atlantic Ocean ◽  
Deep Sea ◽  
Rio De Janeiro ◽  
First Record ◽  
Brazilian Coast ◽  
Southern Brazil ◽  
Western Atlantic ◽  
Lack Of Information ◽  
Campos Basin ◽  
Unknown Species

Despite the increasing number of reports on the deep-sea molluscs from the south-western Atlantic, we know very little about the protobranchs. The lack of information on the protobranch Pelecypoda off southern Brazil is reflected in the genusYoldiella. This contribution is part of an effort to increase the knowledge about this group off the Brazilian coast. Eight species ofYoldiellaare recognized here. ForYoldiella biguttata, previously reported from Brazil, the known distribution is extended southwards to the Campos Basin. ForYoldiella similisthis is the first record in the western Atlantic Ocean. ForYoldiella extensaandYoldiellaaff.jeffreysithis is the first record for Brazil. Four previously unknown species are described,Yoldiella lapernoisp. nov.,Yoldiella paranapuaensissp. nov.,Yoldiella arariboiasp. nov. andYoldiella curupirasp. nov. Considering only conchological features for the Atlantic species we could propose some clusters of species ofYoldiella.

A new deep-sea species of Mitromorpha (Gastropoda: Conoidea: Conidae) off Brazil

2009 ◽  
Vol 90 (3) ◽  
pp. 599-603
Author(s):  
Silvio Felipe Barbosa Lima ◽  
José Carlos Nascimento Barros ◽  
Jonata de A. Francisco
Keyword(s):  
Deep Sea ◽  
West Indies ◽  
The Body ◽  
Western Atlantic ◽  
North East ◽  
North Eastern ◽  
Body Whorl ◽  
Species Being ◽  
A New Species ◽  
Spiral Bands

A new species of Conidae is described from Brazilian waters. Mitromorpha santosi sp. nov. from the Continental Slope off the state of Rio Grande do Norte (north-east Brazil: 04°50′60″–04°51′40″s, 35°06′01″–35°06′46″W) is compared with M. biplicata (western Atlantic), M. usta (eastern Atlantic), M. dalli (north-eastern Atlantic), M. popeae (West Indies), M. undulate (West Indies) and two unnamed Brazilian species being diagnosed as possessing strong axial ribs, second spiral cord on the body whorl more pronounced and yellowish-brown spiral bands. In addition, a lectotype for Mitromorpha undulata, is designated herein.

A new species of the deepwater shrimp genusLeontocaris(Hippolytidae: Caridea) from the South Mid-Atlantic Ridge

2012 ◽  
Vol 92 (5) ◽  
pp. 1083-1088 ◽  
Author(s):  
I.A. Cardoso ◽  
C.H.J.M. Fransen
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Distal Margin ◽  
The South ◽  
Western Atlantic ◽  
The North ◽  
Mid Atlantic Ridge ◽  
Mandibular Palp ◽  
Seamount Chain ◽  
North Western

The hippolytid genusLeontocarisincludes eight species, all restricted to the deep sea (240–2182 m). Associations with deep sea coralline habitats were reported and are herein confirmed. Three Australian species were recorded at seamounts as were the specimens herein identified asL. smarensissp. nov. These specimens were sampled at the South Mid-Atlantic Ridge (SMAR) by the Mar Eco project during 12 bottom trawls using a Sigsbee trawl. The SMAR is a seamount chain that rises from 4000 m depth, with mountains of 100–200 km wide and 14,000 km length.Leontocaris smarensissp. nov. shows closest affinity toL. larfrom the north-western Atlantic andL. yarramundi, from Australia and New Zealand. It differs fromL. larmainly in: (1) the scaphocerite distolateral tooth reaching the distal margin of the blade while clearly falling short in the latter species; and (2) the mandibular palp possessing three distal setae while setae are absent inL. lar. The new species differs fromL. yarramundiin the number and disposition of dorsal teeth on rostrum and in the absence of an acute posterolateral spine on abdominal somites 4 and 5.

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