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

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). 

1967 ◽  
Vol 16 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Ellen F. Luedemann

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.


Author(s):  
Humberto F. M. Fortunato ◽  
Thierry Pérez ◽  
Gisele Lôbo-Hajdu

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.


2009 ◽  
Vol 27 (5) ◽  
pp. 1861-1873 ◽  
Author(s):  
A. C. Silva ◽  
B. Bourles ◽  
M. Araujo

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.


2011 ◽  
Vol 91 (7) ◽  
pp. 1561-1566 ◽  
Author(s):  
Bruno Garcia Andrade ◽  
Paulo Márcio Santos Costa ◽  
Alexandre Dias Pimenta

The genus Opaliopsis from Brazil is revised based on three deep-water species. Opaliopsis atlantis (Clench & Turner, 1952) is confirmed as occurring in north-eastern and south-eastern localities. Opaliopsis opalina (Dall, 1927) is reported for the first time in the south-western Atlantic. A new species, Opaliopsis cearense, is described from the north-eastern Brazilian coast, and is distinguished by its large number of fine spiral cords per teleoconch whorl.


1995 ◽  
Vol 18 (1) ◽  
pp. 61
Author(s):  
S.C. Donnellan ◽  
T.B. Reardon ◽  
T.F. Flannery

Allozyme variation at 19-34 loci is used in the present study to define species boundaries in Australian and Papuan New Guinean tube-nosed bats. Current systematic accounts for these bats are in part contradictory and do not provide an adequate basis for distinguishing the species. Results obtained from the allozyme electrophoretic analysis of 178 individuals show that there are a minimum of five species of Nyctimene and one of Paranyctimene in the region. A single species of Nyctimene was found in Australia and at least four species of Nyctimene in the north coastal ranges of Papua New Guinea. Paranyctimene was genetically uniform and was found in sympatry with up to three species of Nyctimene over most of its range. While the scientific names of several of the species were determined, the nomenclature of the remainder requires a morphological analysis of the available material, including type specimens.


Author(s):  
André Souza Dos Santos ◽  
Pablo Riul ◽  
Ana Claudia Dos Santos Brasil ◽  
Martin Lindsey Christoffersen

Rhodoliths or maërl are calcareous nodules of coralline red algae growing unattached to the substrata. They sustain a high biodiversity, being one of the most important marine benthic environments dominated by macrophytes. Sabellariidae are tube-dwelling filter feeding marine polychaetes that build their tubes by secreting cement from their thoracic glands. Some species are solitary, while others build tubes together, forming large aggregates. This study analyses Sabellariidae collected in rhodolith beds along the subtidal zone of the coast of João Pessoa and Cabedelo, Paraíba, north-eastern Brazil. A total of 100 individuals of six species were identified. Four are reported for the first time for the north-east coast of Brazil: Phragmatopoma caudata Mörch (1863), Sabellaria bella Grube (1870), Sabellaria nanella Chamberlin (1919), and Sabellaria wilsoni Lana & Gruet (1989). The first occurrence of Sabellaria pectinata Fauvel (1923) along the western Atlantic is provided as well as the description of a new species of the genus Sabellaria.


2010 ◽  
Vol 40 (2) ◽  
pp. 354-367 ◽  
Author(s):  
Volodymyr Zharkov ◽  
Doron Nof

Abstract Both the North Brazil Current (NBC) and the Brazil Current (BC) are western boundary currents (WBCs) that separate from the western Atlantic coast. The NBC retroflects and sheds several rings per year (at the retroflection region), whereas the BC rarely sheds rings near its separation point. Traditionally, the difference between these two WBCs has been attributed to the Malvinas Current (MC), whose momentum flux opposes the poleward momentum flux of the BC, thus preventing rings shedding at the point where the current leaves the coast. Even in the absence of the MC, rings from the separating BC would have never been regularly generated because of the relatively large slant of the coastline relative to the zonal direction. Using the recently proposed theory of Zharkov and Nof, it is demonstrated that the large inclination of the coastline between 20° and 45°S (approximately 50°) lies within the regime that does not allow the BC a continuous shedding of rings. In contrast, the inclination of the coastline between 5° and 8°N is sufficiently small to allow the NBC a continuous and smooth shedding of rings. The importance of the coastline inclination comes about through a ring β-induced westward propagation rate. In the small inclination case, the alongshore migration is fast, allowing the newly formed rings to quickly escape from their generation zone (i.e., before they are recaptured by the newly born rings generated behind). In contrast, in the high inclination case, the alongshore speed is so small that the rings spend a long time in the generation area and, consequently, are usually recaptured by the new rings generated just behind them. The authors argue, paradoxically, that the rings occasionally shed by the BC are probably due to the MC that advects the rings away from the generation area, preventing their recapture by the current behind them. Although no new analytical solutions are presented, the authors elaborate on the application of the recapturing condition to the NBC and BC and show new numerical simulations for both the NBC and the BC.


2012 ◽  
Vol 84 (4) ◽  
pp. 979-999 ◽  
Author(s):  
Grazielle Gomes ◽  
Iracilda Sampaio ◽  
Horacio Schneider

The present study focus on the mitochondrial control region to investigate phylogeographic patterns and population structure in Lutjanus purpureus, and to evaluate the genetic similarity between L. purpureus and L. campechanus. For the initial analysis, 810 base pairs sequence from control region were obtained from 239 specimens of L. purpureus collected from four localities off the Brazilian coast. The results revealed the presence of a single panmictic population characterized by high values of genetic diversity. The 299 base pairs hypervariable portion were used for the combined analysis of L. purpureus and L. campechanus, being 275 haplotypes identified in the 414 specimens. Phylogenetic tree and haplotype network did not indicate phylogeographic substructuring between the two species, but rather an intense intermingling of individuals. Considering their marked morphological similarity, the molecular data presented here indicate that only one species of red snapper exists in the western Atlantic.


GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 341-348
Author(s):  
Dr. Mini Jain ◽  
Dr. Mini Jain

In India, higher education is a need of hour. The excellence of Higher Edification decides the production of skilled manpower to the nation. Indian education system significantly teaching has not been tested too economical to form youths of our country employable in line with the requirement of job market. Despite the rise in range of establishments at primary, secondary and tertiary level our young educated folks don't seem to be capable of being used and recovering job opportunities. Reason being they need not non-heritable such skills essential for demand of the duty market. The present study is aimed at analyzing the status of higher education institutions in terms of Infrastructure, various courses of the institute, quality Initiatives and skill development program offered by the Institutes, in the North-East India region, so as to see whether the Higher Educational Institutes of this region are in the process of gradually developing the skills of the students in attaining excellence. The paper also laid emphasis on the measures adopted by these institutes for quality improvement, and to find out their role in combating the adversity acclaimed in the region, since this region’s development is impeded by certain inherent difficulties However, this paper focuses attention on high quality education with special emphasis on higher education for forward linkages through value addition.


1984 ◽  
Vol 1 (1) ◽  
pp. 27-52
Author(s):  
Mahmud A. Faksh

I.Since the end of World War 11, approximately eighty new states havebeen established. Only two, Pakistan and Cyprus, have undergone theagony of dismemberment when Bangladesh broke off in 1973 and theTurkish Republic of Northern Cyprus was declared in 1983. The worldmay now be witnessing the possible breakup of yet a third state:Lebanon, whose disintegration has been accelerated since the June 1982Israeli invasion.Shortly after the invasion began, Henry Kissinger assessed itsconsequence for Lebanon’s future, concluding, “It is neither desirablenor possible to return to the status quo ante in Lebanon.” One possibleoutcome was that some Syrian and Israeli forces would remain in thenorthern and southern ends, respectively, and the central government’sauthority would ostensibly cover the rest of the country. Implicit in theKissinger diagnosis is the possibility of eventual partition.Though the gloomy assessment by the “wizard” of US. foreign policyshould by no means be construed as a portent of an official shift awayfrom the publicly stated US. support of “Lebanon’s sovereignty andterritorial integrity,” a shadow was cast on the country’s prospects.Subsequent developments have seemed to indicate that Lebanon’sdemise looms larger than at any time since the beginning of the civil warin 1975-76.For over a year and a half national fragmentation has proceededinexorably. What many people once could imagine only with difficulty,they now acknowledge: in reality, Lebanon is facing possible death. TheSouth (35 percent of the land area) is occupied by Israel; the North andthe Biqa’ (45 percent) are controlled by Syria; Kasrawan (15 percent) iscontrolled by the Christian Maronite forces (the Lebanese Front forces),which are not subject to the government’s authority. The rest of thecountry-beleaguered Beirut and environs-was until the February1984 breakdown under the government’s shaky control supported bysymbolic US., French, Italian, and British units. The Multi-NationalForce (MNF) was subject to increasing attacks by Muslim leftist factions,as witnessed in the October 23 bombing of the quarters of U.S.Marines and French troops. Thus, instead of keeping peace, the MNFbecame ,a partisan force trying to protect itself. The US. and Frenchforces in particular seemed to have outlived their usefulness as“peacekeepers.” Recurrent fighting in southern Beirut and in theadjacent Chouf mountains, that pitted Christian Maronites and armyunits against Shi‘ite and Druse Muslims constantly threatened theexistence of President Amin Gemayel’s government and consequently arenewal of the civil war. This situation culminated in February 1984 inthe resignation of the Shafiq al-Wazzan’s cabinet, the loss ofgovernment’s control of West Beirut to Muslim-leftist militias, and theimminent collapse of Amin Gemayel’s presidency ...


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