scholarly journals Diatomáceas epífitas em duas populações de Sargassum cymosum C.Ag.

1976 ◽  
Vol 5 ◽  
Author(s):  
Hermes Moreira Filho ◽  
Eurico C. de Oliveira Filho
Keyword(s):  
Sargassum Cymosum

Diatomáceas epífitas em duas populações de Sargassum cymosum C.Ag.

scholarly journals Contribuição para o conhecimento da flora algológica marinha do estado do Paraná

1951 ◽  
Vol 2 (1) ◽  
pp. 125-138 ◽  
Author(s):  
Aylthon Brandão Joly
Keyword(s):  
Splash Zone ◽  
Hypnea Musciformis ◽  
Sargassum Cymosum ◽  
Gigartina Teedii

Esta nota é a primeira contribuição para a distribuição especial das algas marinhas do litoral paranaense (Caiobá). São considerados três tipos de litoral: a) Litoral rochoso sujeito à ação de arrebentação. b) Litoral rochoso mais ou menos abrigado. c) Manguesais. Dentro do esquema proposto, o primeiro tipo é subdividido em 2 zonas: 1.º) Zona dos borrifos, situada acima do limite médio da maré alta (fig. 2 n.º 1), correspondente à "Splash zone" ou à "Sprit zone" dos autores estrangeiros. 2.º) Zona de arrebentação (Ressaca), situada entre os níveis médios das marés baixa e alta, correspondendo à "Interdital zone" ou à "Gezeitenzone" dos autores estrangeiros, (fig. 2 n.º 2). A primeira zona só conta com uma alga, Lyngbya confervoides e pelo menos mais duas espécies de moluscos do gênero Littorina. A segunda zona, a mais rica tanto em algas como em animais, é essencialmente caracterizada em Caiobá pelas algas seguintes: Levringia sp. Chaetomorpha media e Centroceras clavulatum na parte mais alta, associadas a balanoides (craca) e a Mytilus perna (marisco). Mais abaixo domina Pterosiphonia pennata, Hypnea musciformis e Bryocladia thyrsigera. São apresentados também mais três tipos secundários dependendo das condições locais dos rochedos. Esta sucessão de Littorina, Balanus e Mytilus é a mesma existente no sul da África, segundo se depreende dos trabalhos de Stephenson (11,12) e de vários de seus colaboradores. O segundo tipo apresenta também duas zonas, sendo a segunda a mais rica e variada, aparecendo aqui como dominante, uma associação na qual, Callithamnion, Laurencia papulosa, Gigartina Teedii e Sargassum cymosum são as mais abundantes. É sugerida a existência de uma zona abaixo do limite inferior das marés baixas, zona essa representada por Rhodymenia Palmetta, Plocamium brasiliensis e Spatoglossum Schroederi pelo menos. É feita uma rápida enumeração das algas dos manguesais.

Green Synthesis of Gold Nanoparticles Obtained from Algae Sargassum cymosum: Optimization, Characterization and Stability

2020 ◽  
Vol 10 (4) ◽  
pp. 1049-1062
Author(s):  
L. H. Costa ◽  
J.V. Hemmer ◽  
E. H. Wanderlind ◽  
O. M. S. Gerlach ◽  
A. L. H. Santos ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Sargassum Cymosum

The pycnogonid fauna (Pycnogonida, Arthropoda) of the Tayrona National Park and adjoining areas on the Caribbean coast of Colombia

Zootaxa ◽  
2009 ◽  
Vol 2319 (1) ◽  
pp. 1-138 ◽  
Author(s):  
HANS-GEORG MÜLLER ◽  
FRANZ KRAPP
Keyword(s):  
Species Composition ◽  
Shallow Water ◽  
Brown Algae ◽  
National Park ◽  
Caribbean Sea ◽  
Coralline Algae ◽  
Number Of Species ◽  
Sargassum Cymosum ◽  
The Caribbean ◽  
One Year

A complete account on the shallow-water Pycnogonida known up to now from depths between 0-30 m in the Caribbean Sea of Colombia is presented. Almost all the information included herein is based upon the data obtained by the first author during a 14-month fieldwork programme carried out at the Instituto de Investigaciones Marinas de Punta de Betin (INVEMAR) in Santa Marta, Magdalena department.        5312 specimens of 50 species, including 7 species new to science in the genera Ammothella (2), Tanystylum (1), Callipallene (2), Anoplodactylus (1) and Endeis (1), were collected from 179 samples at 45 stations. The area covered by this research ranges in the west from Punta Brava, just near the airport of Santa Marta, eastward to Punta el Diamante at the eastern border of the Tayrona National Park, extending over about 70 km of coastline. Additionally, 6 other pycnogonid species reported previously from outside this area, which are also known from the Caribbean Sea of Colombia are briefly reviewed.        The species from the Santa Marta area are described in detail, with comments on their intraspecific affinities, habitat preference, phenology, vertical distribution and geographic distribution.        Quantitative samples were taken approximately monthly at three stations at Bahía Concha over one year to compare the species composition from substrata of different structure, namely stands of the brown algae Digenia simplex and Sargassum cymosum on a dead Porites reef, and a stand of Thalassia testudinum, which was interspersed with dead coral substratum and coralline algae.        Number of species at all of these stations was found to be similar and species composition of the two species of brown algae almost identical. Achelia sawayai was by far the most numerous species in samples of Digenia simplex, whereas Tanystylum acuminatum and T. isabellae were most numerous in Sargassum cymosum. Species composition in Thalassia was rather different from that of the algal vegetation. In Thalassia, Ammothella appendiculata and A. exornata were the commonest species which were not found in Digenia and Sargassum.        No evidence was found that reproduction of pycnogonids in this tropical area is limited to certain periods of the year. One might presume a shorter reproductive cycle only for Tanystylum acuminatum, because ovigerous males appeared at the end of the rainy season in December and remained until May, therefore for most of the duration of the dry season.        Generally, number of species and specimens collected at all three quantitative sampling stations was rather variable from month to month, implying a heterogenous distribution within the substratum, which surely depend on the distribution of their food.        Zoogeographic patterns are at present almost impossible to interpret, owing to the limited information available on the distribution of most species. However, it can be seen that the Santa Marta region has a very high number of shallow-water pycnogonid species, compared with the fauna of Panamá and Belize, where only 34 and 33 species have been recorded, respectively. However, the high number of species found in the Santa Marta area may be a result of the extensive collecting efforts made over a period of more than one year.

Metabolic profile of the brown macroalga Sargassum cymosum (Phaeophyceae, Fucales) under laboratory UV radiation and salinity conditions

2014 ◽  
Vol 27 (2) ◽  
pp. 887-899 ◽  
Author(s):  
Luz K. Polo ◽  
Marthiellen R. L. Felix ◽  
Marianne Kreusch ◽  
Debora T. Pereira ◽  
Giulia B. Costa ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Metabolic Profile ◽  
Sargassum Cymosum ◽  
Brown Macroalga

scholarly journals Importance of biogenic substrates for the stone crab Menippe nodifrons Stimpson, 1859 (Brachyura: Eriphioidea)

2017 ◽  
Vol 41 (3) ◽  
pp. 459-467
Author(s):  
Douglas Fernandes Rodrigues-Alves ◽  
Samara De Paiva Barros-Alves ◽  
Vivian Fransozo ◽  
Giovana Bertini ◽  
Valter José Cobo
Keyword(s):  
Sex Ratio ◽  
Intertidal Zone ◽  
Carapace Width ◽  
Growth Phases ◽  
Stone Crab ◽  
High Prevalence ◽  
Sargassum Cymosum ◽  
Zone Sampling ◽  
Juvenile Development ◽  
Substrate Types

In order to better understand the ecology of the different growth phases of the stone crab, Menippe nodifrons, and provide information for conservation of the natural stocks, this study describes the utilization of different biogenic substrates by this species in the intertidal zone. Sampling was carried out by hand at Ubatuba, State of São Paulo, Brazil. Crabs were captured among rocks or in association with three different biogenic substrates: Phragmatopoma lapidosa, Sargassum cymosum and Schizoporella unicornis. In the laboratory, the substrates were sorted and scanned for specimens of M. nodifrons, which were separated and measured at their maximum carapace width (CW), and classified as juvenile or adult specimens. Sex ratio and size distribution of crabs were analyzed for each of the substrate types. A total of 686 specimens of M. nodifrons were obtained during the sampling, ranging in size between 2.4 and 82.5 mm CW. Different mean sizes were recorded in the different substrates (P < 0.05). The high prevalence of juveniles in the samples suggests that these microhabitats are fundamental for the juvenile development of M. nodifrons, as they provide refuge, protection and probably food for juveniles.

scholarly journals Life Cycle Observations on Amphilocus neapolitanus (Della Valle, 1853) (Crustacea, Amphipoda) Associated with Sargassum cymosum C. Agardh, 1820 in Ubatuba, (SP), Brazil

2002 ◽  
Vol 45 (3) ◽  
pp. 355-363 ◽  
Author(s):  
Fosca Pedini Pereira Leite
Keyword(s):  
Life Cycle ◽  
Sex Ratio ◽  
Reproductive Biology ◽  
Egg Number ◽  
Sargassum Cymosum ◽  
Males And Females

Day and night densities, reproductive biology and life cycle of Amphilocus neapolitanus (Della Valle, 1853), associated with Sargassum cymosum C. Agardh, 1820, were studied during 13 months. The density of juveniles, males and females was higher in night samples than in day samples. Sex ratio was strongly favorable toward the females. Ovigerous females were present in similar densities in both the periods while the non-ovigerous females were predominant at night. The egg number was not correlated with the size of the females. Breeding occurred throughout the year.

Ultrastructural and structural characterization of zygotes and embryos during development in Sargassum cymosum (Phaeophyceae, Fucales)

PROTOPLASMA ◽  
2014 ◽  
Vol 252 (2) ◽  
pp. 505-518 ◽  
Author(s):  
Ticiane Rover ◽  
Carmen Simioni ◽  
Whitney Hable ◽  
Zenilda L. Bouzon
Keyword(s):  
Structural Characterization ◽  
Sargassum Cymosum
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