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Registros recuperados: 22 | |
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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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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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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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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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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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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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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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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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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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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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Registros recuperados: 22 | |
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