scholarly journals Preliminary results of drift-bottle releases and recoveries in the Western Tropical Atlantic

1967 ◽  
Vol 16 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Ellen F. Luedemann
Keyword(s):  
Surface Current ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Northern Coast ◽  
The North ◽  
Strong Current ◽  
North Brazil ◽  
Equatorial Current ◽  
The Caribbean ◽  
Area North

In February-March 1963, during the Equalant Operation for the ICITA program, 476 drift-bottles were released at the equatorial waters off the northern Brazilian coast (01ºS to 09ºN and 043ºW to 053ºW). Thirty-five, bottles were recovered (7,4%). Those were classed in five groups according to their different velocity ranges and areas of recovery (Trinidad Island; Lesser Antilles; Caribbean and Florida area; north Brazil; northeastern Brazil). The recoveries of bottles released within 300 nm off the northern and northeastern coast of Brazil confirmed a strong current along the north and northeast coast in northwestern direction (South Equatorial Current and branches). In late February-early March the bottles showed maximum velocities of this current (3,6 knots). The region off the northern coast of Brazil, between 05ºN and 09ºN up to 050ºW seems to have been under the influence of an eastward component of the surface current in this same period, while at late March this influence appears to have been weaker. In the region from Trinidad Island to Yucatan Peninsula the current seems to be stronger on the northeastern side of the Caribbean Sea.

Correlated Millennial-Scale Changes in Surface Hydrography and Terrigenous Sediment Yield Inferred from Last-Glacial Marine Deposits off Northeastern Brazil

1998 ◽  
Vol 50 (2) ◽  
pp. 157-166 ◽  
Author(s):  
Helge W. Arz ◽  
Jürgen Pätzold ◽  
Gerold Wefer
Keyword(s):  
North Atlantic ◽  
Isotope Composition ◽  
Sediment Cores ◽  
Ice Cores ◽  
Northeastern Brazil ◽  
Salt Flux ◽  
Terrigenous Sediment ◽  
The North ◽  
North Brazil ◽  
The North Atlantic

The stable isotope composition of planktonic foraminifera correlates with evidence for pulses of terrigenous sediment in a sediment core from the upper continental slope off northeastern Brazil. Stable oxygen isotope records of the planktonic foraminiferal species Globigerinoides sacculiferand Globigerinoides ruber(pink) reveal sub-Milankovitch changes in sea-surface hydrography during the last 85,000 yr. Warming of the surface water coincided with terrigenous sedimentation pulses that are inferred from high XRF intensities of Ti and Fe, and which suggest humid conditions in northeast Brazil. These tropical signals correlate with climatic oscillations recorded in Greenland ice cores (Dansgaard-Oeschger cycles) and in sediment cores from the North Atlantic (Heinrich events). Trade winds may have caused changes in the North Brazil Current that altered heat and salt flux into the North Atlantic, thus affecting the growth and decay of the large glacial ice sheets.

scholarly journals Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020 ◽  
Vol 100 (3) ◽  
pp. 389-400
Author(s):  
Humberto F. M. Fortunato ◽  
Thierry Pérez ◽  
Gisele Lôbo-Hajdu
Keyword(s):  
Current Knowledge ◽  
Atlantic Coast ◽  
Marine Sponges ◽  
Eastern Coast ◽  
Morphological Description ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Western Atlantic ◽  
The North ◽  
North Eastern

AbstractThe Order Suberitida is defined as a group of marine sponges without an obvious cortex, a skeleton devoid of microscleres, and with a deletion of a small loop of 15 base pairs in the secondary structure of the 28S rDNA as a molecular synapomorphy. Suberitida comprises three families and 26 genera distributed worldwide, but mostly in temperate and polar waters. Twenty species were reported along the entire Brazilian coast, and although the north-eastern coast of Brazil seems to harbour a rich sponge fauna, our current knowledge is concentrated along the south-eastern Atlantic coast. A survey was implemented along the northern coast of Brazil, and the collection allowed the identification of six species belonging to the Order Suberitida. Two of them are considered new to science: Suberites purpura sp. nov., Hymeniacidon upaonassu sp. nov., and four, Halichondria (Halichondria) marianae Santos, Nascimento & Pinheiro, 2018, Halichondria (H.) melanadocia de Laubenfels, 1936, Suberites aurantiacus (Duchassaing & Michelotti, 1864), and Terpios fugax Duchassaing & Michelotti, 1864, are re-described. Taxonomic comparisons are made for Tropical Western Atlantic species and type species of the four genera. Finally, an identification key for the Western Atlantic Suberites species is provided.

scholarly journals The deep sea teleost fish fauna of the Brazilian North Coast

2020 ◽  
Vol 18 (3) ◽  
Author(s):  
Alex Garcia Cavalleiro de Macedo Klautau ◽  
Israel Hidenburgo Aniceto Cintra ◽  
Matheus Marcos Rotundo ◽  
Alfredo Carvalho-Filho ◽  
Rodrigo Antunes Caires ◽  
...  
Keyword(s):  
Deep Sea ◽  
Fish Fauna ◽  
North Coast ◽  
Brazilian Coast ◽  
Northern Coast ◽  
Commercial Fish ◽  
The North ◽  
Species Lists ◽  
Sea Fish ◽  
Photographic Records

Abstract Data on the deep sea fishes found off the northern Brazilian coast are restricted to the results of the surveys of the RV Oregon, a research vessel of the North American National Marine Fisheries Service, and the REVIZEE Program. The REVIZEE Score-Norte Program focused on commercial fish species and natural resources with potential for exploitation on the continental shelf and slope off the northern coast of Brazil. In this sense, the REVIZEE Score-Norte Program generated little information on species of no commercial value, did not catalog its inventory in zoological collections, and did not publish species lists. Given this considerable knowledge gap on the deep-sea fish found off the North coast of Brazil, we compiled all the available data on the deep-sea fish of this region and also retrieved photographic records from the REVIZEE Score-Norte Program, including the PRODEMERSAL and PROTUNA projects. Considering the published records, specimens deposited in zoological collections, and the interpretation of photographic records, we compiled a list of 63 species of deep-sea fish from the North coast of Brazil. An additional 30 species were found in the published records from the PRODEMERSAL and PROTUNA, but were considered to be doubtful or pending confirmation.

Pathways connecting the North Brazil Current and the RAPID line

2021 ◽  
Author(s):  
Kimberley Drouin ◽  
M Susan Lozier ◽  
F Javier Beron-Vera ◽  
Phillip Miron ◽  
M Josefina Olascoaga
Keyword(s):  
Three Dimensional ◽  
Volume Transport ◽  
Florida Current ◽  
The North ◽  
Dynamical Systems Analysis ◽  
Brazil Current ◽  
North Brazil ◽  
North Brazil Current ◽  
The Caribbean ◽  
Surface Drifters

<p>The North Brazil Current is considered a bottleneck in the South Atlantic, responsible for funneling upper-ocean waters into the North Atlantic. This work explores the surface and subsurface pathways that connect the North Brazil Current to the RAPID line. To that extent, observational trajectories from surface drifters and Argo floats are used in conjunction with Markov chain theory and tools from dynamical systems analysis to compute probable pathways. More specifically, these pathways are computed as ensembles of paths transitioning directly between the North Brazil Current and the RAPID line. In addition, simulated trajectories will be used (1) to assess how representative the two-dimensional observational trajectories are of the three-dimensional circulation, and (2) to compute the associated volume transport of different pathways. Preliminary results suggest that two dominant pathways connect the North Brazil Current and the RAPID line. First, is the traditional pathway through the Caribbean Sea and Gulf of Mexico, which carries waters to the Florida Current, and second is a more direct route east of the Caribbean that supplies waters to the Antilles Current and the basin interior.  </p>

Taxonomic guide and historical review of echinoids (Echinodermata: Echinoidea) from northeastern Brazil

Zootaxa ◽  
2018 ◽  
Vol 4529 (1) ◽  
pp. 1 ◽  
Author(s):  
ANNE ISABELLEY GONDIM ◽  
RAFAEL BENDAYAN DE MOURA ◽  
MARTIN LINDSEY CHRISTOFFERSEN ◽  
THELMA LÚCIA PEREIRA DIAS
Keyword(s):  
Fossil Record ◽  
Historical Review ◽  
First Record ◽  
Point Of View ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
Ecological Information ◽  
The North ◽  
Annotated List ◽  
Living Species

The class Echinoidea contains among the best-known echinoderms. The group has left the most complete fossil record of this phylum, and contains about 1000 living species, of which 51 are recorded along the Brazilian coast. Although the first record of echinoids in Brazil was made 369 years ago, the knowledge of this fauna remains quite unsatisfactory from a taxonomic and ecological point of view, particularly in the north and northeastern regions of the country. This study provides the first annotated list of echinoids from northeastern Brazil. The studied material largely belongs to collections of the Federal University of Paraíba (CIPY), Federal University of Sergipe (LABIMAR-UFS), Federal University of Bahia (MZUFBA), University of São Paulo (MZUSP), and National Museum of the Federal University of Rio de Janeiro (MNRJ). Thirty-two species from 29 genera, 18 families, and 10 orders were identified. Descriptions of species are provided. Highest diversities of Echinoidea were encountered for the states of Bahia (19 spp.), Alagoas (11 spp.), Paraíba (10 spp.), Ceará (7 spp.), Rio Grande do Norte (7 spp.), and Pernambuco (6 spp.). On the basis of the data analysed, Maranhão (2 spp.), Piauí (2 spp.), and Sergipe (3 spp.) have the lowest diversity. Sandy substrates and depths below 10 m were the least sampled areas over the continental shelf. Although the studied species are common, some taxonomic problems were encountered and discussed. We also provide ecological information and comments on status of the species from the studied region. As a result of this inventory, we were able to provide the first assessment of the echinoid fauna of northeastern Brazil. 

scholarly journals Seasonal Variability of the South Equatorial Current Bifurcation in the Atlantic Ocean: A Numerical Study

2007 ◽  
Vol 37 (1) ◽  
pp. 16-30 ◽  
Author(s):  
Regina R. Rodrigues ◽  
Lewis M. Rothstein ◽  
Mark Wimbush
Keyword(s):  
Seasonal Variability ◽  
Numerical Study ◽  
South American ◽  
The South ◽  
Wind Stress Curl ◽  
South Equatorial Current ◽  
The North ◽  
Brazil Current ◽  
North Brazil ◽  
Equatorial Current

Abstract In this study, a reduced-gravity, primitive equation OGCM is used to investigate the seasonal variability of the bifurcation of the South Equatorial Current (SEC) into the Brazil Current (BC) to the south and the North Brazil Undercurrent/Current (NBUC/NBC) system to the north. Annual mean meridional velocity averaged within a 2° longitude band off the South American coast shows that the SEC bifurcation occurs at about 10°–14°S near the surface, shifting poleward with increasing depth, reaching 27°S at 1000 m, in both observations and model. The bifurcation latitude reaches its southernmost position in July (∼17°S in the top 200 m) and its northernmost position in November (∼13°S in the top 200 m). The model results show that most of the seasonal variability of the bifurcation latitude in the upper thermocline is associated with changes in the local wind stress curl due to the annual north–south excursion of the marine ITCZ complex. As the SEC bifurcation latitude moves south (north) the NBUC transport increases (decreases) and the BC transport decreases (increases). The remote forcing (i.e., westward propagation of anomalies) appears to have a smaller impact on the seasonal variability of the bifurcation in the upper thermocline.

scholarly journals Circulation of the thermocline salinity maximum waters off the Northern Brazil as inferred from in situ measurements and numerical results

2009 ◽  
Vol 27 (5) ◽  
pp. 1861-1873 ◽  
Author(s):  
A. C. Silva ◽  
B. Bourles ◽  
M. Araujo
Keyword(s):  
Numerical Model ◽  
Northern Hemisphere ◽  
Brazilian Coast ◽  
Western Boundary ◽  
Equatorial Undercurrent ◽  
High Salinity Water ◽  
The North ◽  
Brazil Current ◽  
North Brazil ◽  
Northern Edge

Abstract. High resolution hydrographic observations of temperature and salinity are used to analyse the subsurface circulation along the coast of North Brazil, off the Amazon mouth, between 2° S and 6° N. Observations are presented from four cruises carried out in different periods of the year (March–May 1995, May–June 1999, July–August 2001 and October–November 1997). Numerical model outputs complement the results of the shipboard measurements, and are used to complete the descriptions of mesoscale circulation. The Salinity Maximum Waters are here analyzed, principally in order to describe the penetration of waters originating in the Southern Hemisphere toward the Northern Hemisphere through the North Brazil Current (NBC)/North Brazil Undercurrent (NBUC). Our results show that, if the Equatorial Undercurrent (EUC) is fed by Northern Atlantic Waters, this contribution may only occur in the ocean interior, east of the western boundary around 100 m depth. Modeling results indicate a southward penetration of the Western Boundary Undercurrent (WBUC) below the thermocline, along the North Brazilian coast into the EUC or the North Equatorial Undercurrent (NEUC) (around 48° W–3° N). The WBUC in the region does not flow more south than 3° N. The northern waters are diverted eastward either by the NBC retroflection or by the northern edge of the associated clockwise rings. The existence of subsurface mesoscale rings associated to the NBC retroflection is evidenced, without any signature in the surface layer, so confirming earlier numerical model outputs. These subsurface anticyclones, linked to the NBC/NBUC retroflection into the North Equatorial Undercurrent and the EUC, contribute to the transport of South Atlantic high salinity water into the Northern Hemisphere.

scholarly journals Taxonomic study of crustose coralline algae off the northeastern Brazilian coast

Phytotaxa ◽  
2014 ◽  
Vol 190 (1) ◽  
pp. 130 ◽  
Author(s):  
Iara Oliveira Costa ◽  
Paulo Antunes Horta ◽  
Ellie R Bergstrom ◽  
José Marcos De Castro Nunes
Keyword(s):  
Red Algae ◽  
First Record ◽  
Coralline Algae ◽  
Brazilian Coast ◽  
Taxonomic Study ◽  
Northern Coast ◽  
Crustose Coralline Algae ◽  
Coralline Red Algae ◽  
The North ◽  
Ecological Implications

This work presents a detailed morphoanatomical study of crustose coralline algae species from the northeastern Brazilian coast, in the north of Bahia state. Nine species have been recognized: Sporolithon episporum, Lithophyllum stictaeforme, Spongites yendoi, Spongites sp., Mesophyllum erubescens, Phymatolithon masonianum, Phymatolithon calcareum, Lithothamnion crispatum and Lithothamnion brasiliense. Phymatolithon masonianum and Phymatolithon calcareum constitute the first record of these species for the northern coast of Brazil. An identification key, as well as descriptions, illustrations, comparisons with related taxa, and geographical distributions for Brazil as well as global geographic distributions are presented. Additionally, some ecological implications are discussed focusing the need of more studies about this neglected group of coralline red algae.

Using integrative taxonomy to establish the status of Alpheus peasei (Armstrong, 1940) (Decapoda: Alpheidae) as a single species throughout its distribution

Zootaxa ◽  
2019 ◽  
Vol 4629 (1) ◽  
pp. 501-68
Author(s):  
PATRICIA S. SANTOS ◽  
MARIANA TEROSSI ◽  
FERNANDO L. MANTELATTO ◽  
ALEXANDRE O. ALMEIDA
Keyword(s):  
Larval Dispersal ◽  
Morphological Analysis ◽  
Single Species ◽  
Integrative Taxonomy ◽  
Brazilian Coast ◽  
Western Atlantic ◽  
The North ◽  
North Brazil ◽  
The Status ◽  
Entire Distribution

The distribution of the western Atlantic snapping shrimp Alpheus peasei (Armstrong, 1940) has a large gap (approx. 12° of latitude) between Tobago and the northeast of Brazil (State of Ceará). Here we analyzed specimens of A. peasei from its entire distribution range and type-locality (Bermuda), to test the hypothesis that they belong to a single species. The morphological analysis included the usual taxonomic characters as well as additional ones (such as mouthparts). The molecular analysis was based on the mitochondrial genes Cytochrome Oxidase I and 16S rRNA. The results of both analyses were congruent and indicated that A. peasei is a single species throughout its known distribution. As such, they indicated a connectivity between Northwestern and Southwestern Atlantic populations of A. peasei. The gap in distribution may be explained by scarce samplings in the North Brazil Shelf province and/or by passive larval dispersal. Our results also extend the known distribution of A. peasei in the northwestern Atlantic (Barbados, Belize and Costa Rica), and add a new record from the Brazilian coast (Pernambuco). 

Recent Ostracoda (Arthropoda, Crustacea) from São Pedro-São Paulo Archipelago, Brazil: a preliminary approach

Zootaxa ◽  
2012 ◽  
Vol 3335 (1) ◽  
pp. 29 ◽  
Author(s):  
LUCAS SILVEIRA ANTONIETTO ◽  
CLÁUDIA PINTO MACHADO ◽  
DERMEVAL APARECIDO DO CARMO ◽  
JOSÉ WILSON CORREA ROSA
Keyword(s):  
Sao Paulo ◽  
Northeastern Brazil ◽  
Brazilian Coast ◽  
São Paulo ◽  
Western Africa ◽  
The Pacific ◽  
African Coast ◽  
Small Set ◽  
The Caribbean ◽  
European Coast

The present study analyses ostracods from sedimentary samples collected in the São Pedro-São Paulo Archipelago, a small set of remote rock islands located Northeastern to the Brazilian coast. Thirteen species were identified, and their zoogeographical distribution was studied. An emendation for Keijcyoidea praecipua (Bold, 1963) is proposed in this paper. The distribution of the species which occur in the archipelago varies significantly: Triebelina sertata Triebel, 1948, is a cosmopolitan species; Loxoconcha (Loxocorniculum) tricornata is assumed to occur from the Caribbean Sea to the tropical portion of the Brazilian coast and Western Africa. Keijcyoidea praecipua is recorded through the Pacific and Atlantic coasts of Central America and Northeastern Brazil. Xestoleberis toni? Wouters, 2003 and Triebelina cf. intermedia Witte, 1993 are known from the African coast. Neonesidea tenera? (Brady, 1886) emend. Maddocks, 1969 is found along the Indian and Pacific oceans. The species Pontocypris (Ekpontocypris) pirifera? (Müller, 1894) is also present in the western European coast and the Mediterranean Sea. Six species are probably new and have not been observed elsewhere: Aurila sp. 1, Paradoxostoma sp. 1, Paradoxostoma sp. 2, Xestoleberis sp. 1, Xestoleberis sp. 2 and Xestoleberis? sp. 3.

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