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Registros recuperados: 22
Primeira ... 12 ... Última
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The family Phoxocephalopsidae (Crustacea: Amphipoda) from Brazilian coastal waters with description of four new species Anais da ABC (AABC)
DO NASCIMENTO,PRISCILA S.; SEREJO,CRISTIANA S..
Abstract Phoxocephalopsids are fossorial amphipods endemic to the Southern Hemisphere and currently encompass five genera and 15 species, including the four new species herein described. Previous records of the family along the Brazilian coast are limited to Phoxocephalopsis zimmeriSchellenberg, 1931. Based on material from the Crustacean Collection of Museu Nacional/UFRJ four new species of Phoxocephalopsidae areherein described: Phoxocephalopsis ruffoi sp. nov. from Rio de Janeiro, São Paulo, Paraná and Rio Grande do Sul (23o-30oS); Puelche irenae sp. nov. from Espírito Santo and Rio de Janeiro (19o-23oS); Puelche longidactylus sp. nov. from Bahia, Espírito Santo and Rio de Janeiro (12o-23oS) and Puelche mourae sp. nov. found only at Rio de Janeiro. High...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Southwestern Atlantic; Campos Basin; New species; Phoxocephalopsis; Puelche; Taxonomy.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603031
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Salinity and stable oxygen isotope relationship in the Southwestern Atlantic: constraints to paleoclimate reconstructions Anais da ABC (AABC)
BELEM,ANDRE L.; CARICCHIO,CAMILLA; ALBUQUERQUE,ANA LUIZA S.; VENANCIO,IGOR M.; ZUCCHI,MARIA DO R.; SANTOS,TARCIO HENRIQUE R. DOS; ALVAREZ,YACI GALLO.
Abstract: Stable isotopes have been widely used in the literature both to discuss current ocean circulation processes, as well as to reconstitute paleoceanographic parameters. The distribution of oxygen and deuterium stable isotopes in seawater (δ18Osw and δDsw) at the Western Tropical South Atlantic border was investigated to better understand the main fractionation processes of these isotopes and establish a regional salinity and δ18Osw relation to improve the paleoceanographic knowledge in the region. This study was conducted during a quasi-synoptic oceanographic cruise in which 98 discrete seawater samples were collected in the core of the main water masses for stable isotope analysis. A strong correlation between δ18Osw and δD was found, which made it...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Paleosalinity; Stable isotopes; Southwestern Atlantic; Oxygen 18; Seawater isotopic composition.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500504
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Synopsis of the knowledge on the Brazilian aplacophorans (Mollusca: Caudofoveata & Solenogastres) Biota Neotropica
Passos,Flávio Dias; Miranda,Marcel Sabino; Corrêa,Paulo Vinicius Ferraz.
Abstract: Aplacophorans are well known as exclusively marine benthic molluscs with a vermiform body covered by aragonitic sclerites (also called spicules), whose species are widely distributed from the sublittoral down to the abyss. Currently, only nine species are known from Brazil (one Solenogastres and eight Caudofoveata), but these very few records are no longer a reflection of an existing low diversity. Sampling in deep waters has been conducted recently in oil-rich areas of the Brazilian coast, and the museum collections have now many aplacophoran lots. There is a need to learn about and/or install some microscopical facilities in Brazilian institutions, to form expertise for the investigations on these generally small animals. With studies on...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aplacophora; Molluscs; Biodiversity; Southwestern Atlantic.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000100201
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Whalesuckers and a spinner dolphin bonded for weeks: does host fidelity pay off? Biota Neotropica
Silva-Jr,José Martins; Sazima,Ivan.
The whalesucker Remora australis (Echeneidae) is an oceanic diskfish found attached to cetaceans only and its habits are therefore poorly known. At the Fernando de Noronha Archipelago, off North-eastern Brazil, spinner dolphins Stenella longirostris (Delphinidae) regularly congregate in large groups in a shallow bay, which allows for underwater observations of their behaviour and their fish associates. In the course of a broader study of this elusive diskfish, we had the opportunity to made multiple records of two whalesucker couples (three of the fish naturally marked) attached to the same individual dolphin in two different years, over periods of 47 and 87 days respectively. In all the sightings the whalesucker individuals of a couple were recorded...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish-cetacean association; Host attachment fidelity; Mate finding; Echeneidae; Delphinidae; Southwestern Atlantic.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032003000200012
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Biogeographic and species richness patterns of Gastropoda on the southwestern Atlantic BJB
FLOETER,S. R.; SOARES-GOMES,A..
Patterns of richness and biogeography of Gastropoda molluscs were determined based on lists of species from five sites along the southwestern Atlantic. The analysis of the distribution patterns of these sites confirmed the existence of a broader transition zone between southern Espírito Santo State (21°S) and Rio Grande do Sul State (32°S). This zone is very heterogeneous, presenting a low endemism rate and a significant number of species common to the near provinces, and does not show enough consistency to be considered as an independent biogeographic province as proposed by Palacio (1980). Observing the distribution of species along the southwestern Atlantic we find an increase in the proportion of species with greatest latitudinal ranges (occurring from...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogeography; Gastropoda; Southwestern Atlantic; Diversity.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400006
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Chaetognatha of the Brazil-Malvinas (Falkland) confluence: distribution and associations Iheringia, Sér. Zool.
Crelier,Alina M.; Daponte,María C..
The planktonic chaetognaths from the Brazil-Malvinas (Falkland) confluence, extending between 36º 30' - 50º 5' S and 60º 33' - 41º 7' W, were studied. Ten species were found: Eukrohnia hamata (Möbius, 1875) (Eukrohniidae), Pterosagitta draco (Krohn, 1853) (Pterosagittidae), Sagitta enflata Grassi, 1881, Sagitta gazellae Ritter-Zahony, 1909, Sagitta hexaptera d´Orbigny, 1834, Sagitta lyra Krohn, 1853, Sagitta minima Grassi, 1881, Sagitta planctonis Steinhaus, 1896, Sagitta serratodentata Krohn, 1853, and Sagitta tasmanica Thomson, 1947 (Sagittidae). Sagitta gazellae was the most abundant species followed by E. hamata, S. tasmanica and S. serratodentata. The association analysis among the different species, salinity and temperature revealed two groups of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Eukrohniidae; Pterosagittidae; Sagittidae; Southwestern Atlantic; Zooplankton.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000400008
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Redescription and new records of Synopia ultramarina Dana (Amphipoda: Synopiidae) from off the northeastern Brazil, with comments on its morphological variations Iheringia, Sér. Zool.
Senna,André R.; Andrade,Luiz F.; Guedes,Urssula N.; Pereira-Filho,Guilherme H..
ABSTRACT Synopia ultramarina Dana, 1853 is considered a circumtropical species and was originally described based on material collected from two localities near halfway between the southwestern Africa and northeastern Brazil. The species is redescribed here with samples from Fernando de Noronha Archipelago, Pernambuco state, northeastern Brazil. The material examined was collected by SCUBA diving, from rhodolith beds, in Ressureta Channel, between Meio and Rata Islands. Additional material was collected from off Ceará state coast, during environmental consultancies, by Petrobras S. A., and off Pernambuco state coast, during the Project REVIZEE NE IV. Discussion on morphological variations of the species is presented, based on the studied material and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crustacea; Oceanic island; New record; Taxonomy; Southwestern Atlantic.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100217
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Taxonomic and functional diversity of mollusk assemblages in a tropical rocky intertidal zone Iheringia, Sér. Zool.
Souza,Shayanna M. A. da R.; Matthews-Cascon,Helena; Couto,Erminda da C. G..
ABSTRACT We investigated the spatial variation of molluscan assemblages with different habitat-forming species and bare rock habitat in a rocky intertidal zone in northeastern Brazil. The high intertidal zone substrate was covered predominantly of barnacles [Chthamalus bisinuatus (Pilsbry, 1916)], the mid-intertidal of mussels [Brachidontes exustus (Linnaeus, 1758)] and the low intertidal of macroalgae chlorophytes [Gayralia oxysperma (Kützing) K. L. Vinogradova ex Scagel et al., 1989 and Ulva lactuca Linnaeus, 1753], phaeophytes [Sargassum vulgare C. Agardh] and rhodophytes [Palisada flagellifera (J.Agardh) K. W. Nam, 2007]. A total of 3,861 mollusks were recorded, belonging to the classes Gastropoda (9 species; 3,800 individuals), Bivalvia (3 spp.; 54...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Trophic groups; Benthic ecology; Ecosystem engineers; Biological substrate; Southwestern Atlantic.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212020000100227
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Sewage impact on the composition and distribution of Polychaeta associated to intertidal mussel beds of the Mar del Plata rocky shore, Argentina Iheringia, Sér. Zool.
Elías,Rodolfo; Rivero,María Silvia; Vallarino,Eduardo Alberto.
The polychaete composition and distribution within mussel beds were studied in order to assess organic pollution due to domestic sewage in a rocky shore of Mar del Plata (Argentina) during 1997. Four stations and a control site were randomly sampled around the local effluent. Quantitative data on polychaetes, as well as sediment accumulated among mussels and its organic carbon content were measured. Polychaete distribution patterns are related to the organic matter gradient, being Capitella cf. capitata, Neanthes succinea (Frey & Leuckart, 1847) and Boccardia polybranchia (Haswell, 1885) the dominant indicator species close to the effluent. At medial distances, the cirratulids Caulleriella alata (Southern, 1914) and Cirratulus cirratus (Müller,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Polychaeta; Intertidal; Mussel beds; Sewage; Southwestern Atlantic.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300009
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Hatching and larval export of the intertidal crab Neohelice granulata in Mar Chiquita coastal lagoon, Argentina Iheringia, Sér. Zool.
Sánchez Vuichard,Guillermina; Farías,Nahuel; Luppi,Tomás.
Synchronization in the events of the reproductive cycle in female Neohelice granulata Dana, 1851 were studied from samples taken weekly and biweekly from September to December 2006 in the Laguna Mar Chiquita. The timing and larval hatching and synchronicity were inferred from numbers of ovigerous females and observing the stages of embryonic development. Synchronization in larval hatching also was observed in females in experiments in dark for a period of 48 hours, at three different salinities (10, 23 and 33 ppm). In addition plankton sampling were performed in order to study larval exportation at the field and its link to the tidal and light/dark cycles. We found that ovigerous females of N. granulata have a marked synchronization in embryonic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hatching synchronicity; Endogenous rhythm; Larval exportation strategy; Estuaries; Southwestern Atlantic.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000200007
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Meroplankton community structure across oceanographic fronts along the South Brazil Shelf ArchiMer
Costa Brandao, Manoela; Garcia, Carlos A.e; Freire, Andrea S..
The influence of oceanographic fronts on the abundance and community composition of invertebrate larvae, mostly of benthic species, along nearly 2000 km of the southwestern Atlantic shelf (21–34°S) was investigated. Meroplankton was sampled through vertical hauls at 89 stations, distributed along 14 cross-shelf transects, during late spring 2010 and early summer 2011. Salinity and temperature were registered with a CTD/rosette system, which provided seawater for chlorophyll-a and nutrient concentrations estimations. Vertical profiles of temperature, salinity, chlorophyll-a and nutrients were used as proxies of the fronts. In addition, high-resolution thermosalinograph data were used to detect surface frontal features. Meroplankton abundance peaks were...
Tipo: Text Palavras-chave: Frontal zones; Invertebrate larvae; Water mass; Large-scale variability; Southwestern Atlantic.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00628/74056/75783.pdf
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Habitat suitability and environmental niche comparison of cold-water coral species along the Brazilian continental margin ArchiMer
Barbosa, Romina; Davies, A. J.; Sumida, P. Y. G..
In face of increasing anthropogenic disturbance in the deep sea, it is a priority to better understand the regional distribution of cold-water corals (CWC). These organisms create some of the most species-rich habitats in the deep sea and, for this reason, they must be properly protected and managed. In this study, we aimed to identify suitable habitat for multiple CWC taxa off the Brazilian continental margin and compare their environmental niches. Habitat suitability models were developed using the Maxent approach, which allowed for the prediction of species distribution and for the identification of potential 'hot spot' areas that may be important for biodiversity conservation. Ecological niches were determined by a PCA-env approach, and niche...
Tipo: Text Palavras-chave: Deep-sea corals; Habitat suitability modelling; Lophelia pertusa; Environmental niche; Southwestern Atlantic; Octocorallia; Scleractinia.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00607/71927/76567.pdf
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Erylus toxiformis (Porifera, Geodiidae), a new species from the southwestern Atlantic Naturalis
Mothes, Beatriz; Lerner, Cléa.
A new species of Erylus (Porifera, Geodiidae) from the southwestern Atlantic, Erylus toxiformis n. sp. is described off Rio Grande do Sul coast, Brazil.
Tipo: Article / Letter to the editor Palavras-chave: Porifera; Demospongiae; Geodiidae; Erylus toxiformis n.sp.; Southwestern Atlantic; Taxonomy.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/504866
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Stelletta hajdui, a new species from the southwestern Atlantic (Porifera, Choristida, Ancorinidae) Naturalis
Lerner, Cléa; Mothes, Beatriz.
A new species of Stelletta from the southwestern Atlantic, Stelletta hajdui sp.n. is described from the slope off Rio Grande do Sul State coast, Brazil (32°24'S, 50°15'W) (Fig.1). The material studied was dredged up at the depth of 200m by the R/V Atlântico Sul, during “Projeto Talude” run by Fundação Universidade de Rio Grande (FURG). A key to the Brazilian Stelletta sponges is provided.
Tipo: Article / Letter to the editor Palavras-chave: Porifera; Choristida; Ancorinidae; Southwestern Atlantic; Taxonomy.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/505532
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Shallow-water Haplosclerida (Porifera, Demospongiae) from Rio de Janeiro State, Brazil (southwestern Atlantic) Naturalis
Muricy, Guilherme; Ribeiro, Suzi M..
Six species of haplosclerid sponges are described from shallow waters in the coast of Rio de Janeiro state, southeastern Brazil (southwestern Atlantic). Three species: Amphimedon viridis Duchassaing & Michelotti, 1864, Callyspongia (Callyspongia) pallida Hechtel, 1965 and Oceanapia nodosa (George & Wilson, 1919) are already known from neighbouring biogeographic provinces (viz., the Caribbean) and the other three are new to science, viz., Callyspongia (Toxochalina) pseudotoxa sp. n., Arenosclera brasiliensis sp. n. (both provisional endemics from Rio de Janeiro state), and Haliclona melana sp. n. Ecological data, known pharmacological properties, and morphological variations along the geographic range of the species are discussed, and a key to the...
Tipo: Article / Letter to the editor Palavras-chave: Taxonomy; Haplosclerida; Southwestern Atlantic; Callyspongia (Toxochalina) pseudotoxa sp. n.; Arenosclera brasiliensis sp. n.; Haliclona melana sp. n.
Ano: 1999 URL: http://www.repository.naturalis.nl/record/504686
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Determination of limited histotrophy as the reproductive mode in Mustelus schmitti Springer, 1939 (Chondrichthyes: Triakidae): analysis of intrauterine growth of embryos Neotropical Ichthyology
Orlando,Luis; Pereyra,Inés; Silveira,Santiago; Paesch,Laura; Oddone,Maria Cristina; Norbis,Walter.
ABSTRACT This work analyzed length-mass relationship, growth in length, mass variations and dynamic of yolk sac depletion of Mustelus schmitti embryos, extracted from females catched by the artisanal fishery acting off La Paloma (34°39'S, 54°10'W, Uruguay) during 2006 and 2007. Differences in total length and total mass between sexes were not significant. Embryos showed a negative allometric growth for both years with a slope change near the day 170 of the year, likely to be associated with the depletion of the external yolk sac. Gompertz and Von Bertalanffy curves were adjusted for each year. Parturition date was determined around the day 300 of the year. Yolk depletion followed a logistic dynamic Yt=1/(1+e(-13.749 + 0.072*t)) for 2006 and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Embryo growth; Matrotrophy; Narrownose smoothhound; Reproductive mode; Southwestern Atlantic.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400699
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On the morphological differentiation between Libinia spinosa and L. ferreirae (Crustacea: Brachyura: Majoidea: Epialtidae) Rev. Bras. Zool.
Tavares,Marcos; Santana,William.
Libinia spinosa H. Milne Edwards in Guérin, 1832 and L. ferreirae Brito Capello, 1871, inhabit very similar environments, and their geographic and bathymetric distributions overlap for about 3000 km along the southwestern Atlantic. Both species are commonly caught in the same haul and differentiating between them can often be difficult. Traditionally, morphological differentiation between L. spinosa and L. ferreirae has been based exclusively on the number of spines along the median, longitudinal line of the carapace and the development of a process at the anterolateral angle of the basal segment of the antenna. Because Libinia spinosa and L. ferreirae share similar numbers of median spines (7 and 6, respectively), and the number of median spines of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Decapoda; Libinia gibbosa; Pisinae; Southwestern Atlantic; Spider crabs.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000600009
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Comments on brazilian Halichondria Fleming (Halichondriidae, Halichondrida, Demospongiae), with the description of four new species from the São Sebastião Channel and its environs (Tropical Southwestern Atlantic) Zoologia
Carvalho,Mariana de S.; Hajdu,Eduardo.
Over 70 species of Halichondria Fleming, 1828 are known world-wide, but only five from the Brazilian Coast. Brazilian records have their status re-evaluated here, and four new species are described for the São Sebastião Channel area, in the Tropical Southwestern Atlantic, viz. H. cebimarensis sp. n., H. sulfurea sp. n., H. migottea sp. n. and H. tenebrica sp. n.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porifera; Halichondria; Taxonomy; Brazilian coast; Southwestern Atlantic; New species.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500013
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Primeiro registro de Lepteces ornatus Rathbun (Decapoda, Brachyura, Majidae) para o Atlântico Sul Zoologia
Melo,Gustavo Augusto S. de; Crivelaro,Thais Brandini.
During the project GEDIP, in the coast of the State of Rio Grande do Sul, with some stations off Uruguay, a specimen female of the brachyuran crab Lepteces ornatus Rathbun, 1893 was found. Up till now this species was known only by his type material, from Arrowsmith Bank, Yukatan, Mexico. Description, material examined and distribution are done.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Uruguay; Lepteces ornatus; Brachyura; Majidae; New record; Southwestern Atlantic.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300015
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Shallow-water Aplysina Nardo (Aplysinidae, Verongida, Demospongiae) from the São Sebastião Channel and its environs (Tropical southwestern Atlantic), with the description of a new species and a literature review of other brazilian records of the genus Zoologia
Pinheiro,Ulisses dos Santos; Hajdu,Eduardo.
Two species of Aplysina Nardo, 1834 are described in this article, Aplysina caissara sp. n. and A. fulva (Pallas, 1766). Additionally, a possible third species was identified as A. aff. cauliformis. Collections were done in the São Sebastião Channel area as an ongoing effort to assess the poriferan biodiversity of the northern sector of the São Paulo State coastline. Specimens were collected by scuba diving, and descriptions of external morphology are based on the observation of populations alive, and on extensive underwater photography. A literature review of other brazilian records of Aplysina was undertaken, and an ammended species list is offered.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porifera; Aplysina; Sponges; Southwestern Atlantic; Taxonomy; Brazil.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500012
Registros recuperados: 22
Primeira ... 12 ... Última
 

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