Consulta: subjectFacets:"Dinophyceae"
Registros recuperados: 15
Data/hora: 01/06/2024 10:18:06

Effect of environmental and nutritional factors on growth and azaspiracid production of the dinoflagellate Azadinium spinosum
Provedor de dados: 5
Autores: Jauffrais, Thierry; Sechet, Veronique; Herrenknecht, Christine; Truquet, Philippe; Savar, Veronique; Tillmann, Urban; Hess, Philipp.
Azadinium spinosum, a small dinoflagellate isolated from the North Sea, is a producer of azaspiracids (AZAs), a group of biotoxins associated with human illness following ingestion of contaminated shellfish. Using batch and continuous cultures of A. spinosum, the present study investigated the effects of different environmental and nutritional factors (salinity, temperature, photon flux density, aeration, culture media, nitrogen sources, phosphate source, and N/P ratios) on growth, maximum cell concentration, and AZA cell quota.  Azadinium spinosum grew in a wide range of conditions; from 10 ̊C to 26 ̊C and salinities from 30 to 40, under irradiances ranging from 50 μmol m−2 s−1 to 250 μmol m−2 s−1, with or without aeration. Growth and maximum cell...
Tipo: Text
Palavras-chave: AZA; Chemostat; Dinophyceae; Nutrients; N/P ratio; Photobioreactor.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00149/26054/24411.pdf

The formation of the twin resting cysts in the dinoflagellate Dissodinium pseudolunula, a parasite of copepod eggs
Provedor de dados: 5
Autores: Gomez, Fernando; Artigas, Luis Felipe.
The dinoflagellate Dissodinium pseudolunula is the most common and widespread ecto-parasite of copepod eggs in neritic waters. When the host is absent, the species survives with a distinctive pair of twin resting cysts described as Pyrocystis margalefii. Based on live samples, the formation of the twin resting cysts is illustrated here for the first time. The gymnodinioid infective cells did not form overwintering cysts under unfavourable conditions. These are formed inside the secondary lunate sporangium.
Tipo: Text
Palavras-chave: Dinophyceae; Life cycle; Overwintering cyst; Parasitism; Resting spores.
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00373/48456/48732.pdf

Ailadinium reticulatum gen. et sp. nov. (Dinophyceae), a New Thecate, Marine, Sand-Dwelling Dinoflagellate from the Northern Red Sea
Provedor de dados: 5
Autores: Saburova, Maria; Chomerat, Nicolas.
A new photosynthetic, sand-dwelling marine dinoflagellate, Ailadinium reticulatum gen. et sp. nov., is described from the Jordanian coast in the Gulf of Aqaba, northern Red Sea, based on detailed morphological and molecular data. A. reticulatum is a large (53–61 μm long and 38–48 μm wide), dorsoventrally compressed species, with the epitheca smaller than the hypotheca. The theca of this new species is thick and peculiarly ornamented with round to polygonal depressions forming a foveate-reticulate thecal surface structure. The Kofoidian thecal tabulation is APC (Po, cp), 4′, 2a, 6′′, 6c, 4s, 6′′′, 1p, 1′′′′ or alternatively it can be interpreted as APC, 4′, 2a, 6′′, 6c, 4s, 6′′′, 2′′′′. The plate pattern of A. reticulatum is noticeably different from...
Tipo: Text
Palavras-chave: Benthic dinoflagellates; Dinophyceae; Gulf of Aqaba; Jordan; LSU rDNA; Molecular phylogeny; Morphology; Red Sea; SSU rDNA; Taxonomy.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00226/33678/38183.pdf

Madanidinium loirii gen. et sp nov. (Dinophyceae), a new marine benthic dinoflagellate from Martinique Island, Eastern Caribbean
Provedor de dados: 5
Autores: Chomerat, Nicolas; Bilien, Gwenael.
A new benthic phototrophic dinoflagellate is described from sediments of a tropical marine cove at Martinique Island and its micromorphology is studied by means of light and electron microscopy. The cell contains small golden-brown chloroplasts and the oval nucleus is posterior. It is laterally compressed, almost circular in shape when viewed laterally. It consists of a small epitheca tilted toward the right lateral side and a larger hypotheca. In the left view, the cingulum is more anterior and the epitheca is reduced. The cingulum is displaced and left-handed. This organism is peculiar in having no apical pore and its thecal plate arrangement is 2 ' 1a 7 '' 5c 3s 5 ''' 1 ''''. The plates are smooth with small groups of pores scattered on their surface....
Tipo: Text
Palavras-chave: Caribbean; Benthic; Dinophyceae; SEM; Phylogeny; Morphology; Taxonomy; Martinique; RDNA.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00195/30622/29458.pdf

Paralytic shellfish poison outbreaks in the Penze estuary: Environmental factors affecting toxin uptake in the oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Lassus, Patrick; Baron, Regis; Garen, Pierre; Truquet, Philippe; Masselin, Pierre; Bardouil, Michele; Leguay, Didier; Amzil, Zouher.
Several experiments using a self-regulated system were conducted to define the factors likely to influence the uptake of paralytic shellfish poison (PSP) by oysters in the Penze estuary (France, Brittany). Each 4-day experiment was carried out in a recirculated sea water system using 15 Pacific oysters (Crassostrea gigas) separated from each other and supplied with unfiltered natural seawater containing alternatively toxic (Alexandrium minutum) or non-toxic (Skeletonema costatum) algal diets. The food supply and exposure times to toxic diets were determined according to field studies of the Upstream and downstream movement of patches containing A. minutum. The experimental parameters corresponded roughly to the hydrological conditions generally observed in...
Tipo: Text
Palavras-chave: Experimental contamination; Oyster toxicity; Dinophyceae; Toxin; PSP.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-400.pdf

Fragilidium duplocampanaeforme sp nov (Dinophyceae): A new phagotrophic dinoflagellate from the French Atlantic coast
Provedor de dados: 5
Autores: Nezan, Elisabeth; Chomerat, Nicolas.
A new species of the genus Fragilidium, F. duplocampanaeforme sp. nov., is described from examinations by LM and SEM. This species has been recorded in summer on the French Atlantic coast, over a number of years. It was never abundant in the plankton and was very often associated with Fragilidium subglobosum, Pyrophacus horologium and also with toxigenic species of the genera Alexandrium and Dinophysis. Phagotrophy of F. duplocampanaeforme on Dinophysis prey is shown, and sexual reproduction is suggested by the observation of gamete-like small forms. The size and the peculiar shape of its cells do not correspond to any known taxon, but the plate arrangement fits the genus Fragilidium. The plate formula is Po, Pc, 4', 8 '', 10c, 6s?, 7"', 2 '''', lp. A...
Tipo: Text
Palavras-chave: Taxonomy; Phagotrophy; Fragilidium duplocampanaeforme sp nov.; Fragilidium; Dinophyceae; Atlantic ocean.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6233.pdf

Taxonomic characterization of a brackish water, bloom-forming Peridiniopsis species (Peridiniales, Dinophyceae) from Iraq
Provedor de dados: 5
Autores: Hameed, Hameed A.; Saburova, Maria; Chomérat, Nicolas.
Background The occurrence of a small brackish water bloom-forming dinoflagellate belonging to the genus Peridiniopsis is reported for the first time from the Shatt Al-Arab River in Iraq. Based on the study of cell morphology, this taxon was attributed to the recently described Peridiniopsis minima, recorded so far only from the Jiulongjiang River, China. Results The description of P. minima was extended to include some previously unreported details of the thecal surface, apical pore complex, and sulcus structure using light and scanning electron microscopy. Cells of this species from Iraq were oval to rhombic in shape and slightly dorso-ventrally compressed, with distinct red eyespot and endosymbiont nucleus. Cells were covered by a thin theca with the...
Tipo: Text
Palavras-chave: Dinophyceae; Dinoflagellates; Iraq; Morphology; Peridiniopsis; Shatt Al-Arab River; Taxonomy; SEM.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00664/77594/79608.pdf

Isolation of 12 microsatellite markers following a pyrosequencing procedure and cross-priming in two invasive cryptic species, Alexandrium catenella (group IV) and A. tamarense (group III) (Dinophyceae)
Provedor de dados: 5
Autores: Laporte, Martin; Shao, Zhaojun; Berrebi, Patrick; Laabir, Mohamed; Abadie, Eric; Faivre, Nicolas; Rieuvilleneuve, Fabien; Masseret, Estelle.
Alexandrium catenella (group IV) and Alexandrium tamarense (group III) (Dinophyceae) are two cryptic invasive phytoplankton species belonging to the A. tamarense species complex. Their worldwide spread is favored by the human activities, transportation and climate change. In order to describe their diversity in the Mediterranean Sea and understand their settlements and maintenances in this area, new microsatellite markers were developed based on Thau lagoon (France) samples of A. catenella and A. tamarense strains. In this study twelve new microsatellite markers are proposed. Five of these microsatellite markers show amplifications on A. tamarense and ten on A. catenella. Three of these 12 microsatellite markers allowed amplifications on both cryptic...
Tipo: Text
Palavras-chave: Invasive species; Phytoplankton; Alexandrium; Dinophyceae; Microsatellite markers; Biogeography.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/30026/29398.pdf

Cabra reticulata sp. nov. (Dinophyceae), a new sand-dwelling dinoflagellate from the Atlantic Ocean
Provedor de dados: 5
Autores: Chomerat, Nicolas; Nezan, Elisabeth.
A new sand-dwelling dinoflagellate species, Cabra reticulata sp. nov., is described from sandy habitats in the south of Brittany (northwestern France). This new species possesses the characteristics of the 'unusual' genus, Cabra Murray et Patterson. The thecal plate formula is Po Pt 3' 1a 4'' 'x' 3c ?s 5''' 1'''' (or alternatively interpreted as Po Pt 4' 0a 4'' 'x' 3c ?s 5''' 1''''). Because of the strong lateral compression, cells of C. reticulata are frequently seen laterally and have a polygonal shape, with three prominent antapical pointed flanges and a dorsal spine in the anterior part of the hypotheca. The cingulum is ascending and incomplete. The thecal surface is ornamented with strong reticulations forming polygonal areolae, which differs from C....
Tipo: Text
Palavras-chave: Taxonomy; Sand dwelling; Roscoffia; Protists; Podolampaceae; Marine; Dinophyceae; Benthic.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6804.pdf

Laciniporus arabicus   gen. et sp. nov. (Dinophyceae, Peridiniales), a new thecate, marine, sand-dwelling dinoflagellate from the northern Indian Ocean (Arabian Sea)
Provedor de dados: 5
Autores: Saburova, Maria; Chomérat, Nicolas.
A new thecate, photosynthetic, sand‐dwelling marine dinoflagellate, Laciniporus arabicus gen. et sp. nov., is described from the subtidal sediments of the Omani coast in the Arabian Sea, northern Indian Ocean, based on detailed morphological and molecular data. Cells of L. arabicus are small (16.2‐30.1 μm long and 13.1‐23.2 μm wide), dorsoventrally compressed, with a small apical flap‐shaped projection pointing to the left. The thecal plate pattern is distinguished by minute first precingular plate and sulcus, which extends into the epitheca, with large anterior and right sulcal plates. The Kofoidian thecal tabulation is Po, X, 4′, 2a, 7′′, 6c, 6s, 5′′′, 2′′′′. Morphologically, the revealed plate pattern has an affinity to the Peridiniales, and LSU rDNA...
Tipo: Text
Palavras-chave: Arabian Sea; Benthic dinoflagellates; Dinophyceae; Laciniporus arabicus; Molecular phylogeny; Morphology; Oman; Peridiniales; Taxonomy.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00454/56614/58315.pdf

Revisión de los taxones del género Neoceratium F. Gómez, De Moreira et P. López-García (Dinophyceae) y primer registro de N. dens en el mar Caribe colombiano
Provedor de dados: 20
Autores: Vidal, L. A.; Lozano-Duque, Y.
Se presenta una síntesis de los taxones del género Neoceratium hallados en un transecto a lo largo de la costa Caribe colombiana, en las bahías de Gaira y Santa Marta y en la Ciénaga Grande de Santa Marta. Con base en una extensiva revisión bibliográfica, se encontró que de los 65 taxones del género Neoceratium registrados en este estudio, 56 lo han sido ya para el mar Caribe colombiano y los nueve restantes son registros nuevos para la región. Neoceratium arietinum f. gracilentum, N. breve var. curvulum, N. humile, N. symmetricum var. coarctatum, N. longissimum y N. horridum, burceros &gt; horridum se registran por primera vez para el Caribe colombiano. Neoceratium dens, sin registros en el Atlántico y mares adyacentes, se encuentra pro primera vez par...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Neoceratium des; Dinophyceae.
Ano: 2011
URL: http://hdl.handle.net/1834/4404

Dinoflagelados em diversos habitats e hidroperíodos na zona costeira do sul do Brasil
Provedor de dados: 39
Autores: Cardoso,Luciana de Souza; Torgan,Lezilda Carvalho.
Informações sobre a riqueza, densidade, diversidade e distribuição de dinoflagelados em habitats aquáticos (lagoas abertas e fechadas, canais, açudes e áreas úmidas), em relação aos períodos de águas altas e baixas, são apresentadas. O estudo baseou-se em amostragens realizadas em 23 pontos, localizados nas margens leste (área da Lagoa do Casamento) e oeste (área do Butiazal de Tapes) da laguna dos Patos, no ano de 2003. Foram identificados 11 táxons, cuja distribuição teve maior homogeneidade no período de águas altas. Durinskia baltica (Levander) Carty &amp;amp; Cox foi o único táxon cuja distribuição não se alterou pelo hidroperíodo. Peridinium gatunense Nygaard foi uma espécie indicadora de águas altas e P. umbonatum Stein foi indicadora de habitats...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dinophyceae; Ecologia; Água doce; Zona subtropical.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000200015

Dinophyceae do estado de Mato Grosso, MT, Brasil: municípios de Barra do Bugres, Cáceres, Chapada dos Guimarães, Porto Esperidião e Quatro Marcos
Provedor de dados: 39
Autores: Menezes,Mariângela; Fernandes,Valéria de Oliveira.
São apresentados estudos taxonômicos preliminares das Dinophyceae tecadas, baseados em amostras coletadas em julho de 1983 e novembro de 1984, nos Municípios de Barra do Bugres, Cáceres, Chapada dos Guimarães, Porto Esperidião e Quatro Marcos, Estado de Mato Grosso, Brasil. Foram identificados três taxons do gênero Peridinium Ehr. e um de Sphaerodinium Wol. Todas as espécies constituem primeira citação de ocorrência para o Estado de Mato Grosso e uma (P. africanum Lemm.) para o Brasil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dinophyceae; Taxonomia; Mato Grosso; Brasil.
Ano: 1990
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061990000200002

Dinoflagelados (Peridiniales, Prorocentrales) do microplâncton na plataforma continental e talude do extremo sul do Brasil (inverno 2005, verão 2007)
Provedor de dados: 49
Autores: Islabão,Carolina Antuarte; Odebrecht,Clarisse.
Este estudo teve por objetivo identificar as morfo-espécies de dinoflagelados do microplâncton (&gt;20 μm) das Ordens Peridiniales e Prorocentrales ao largo do Cabo de Santa Marta Grande, CSMG (SC, 28º 40' S) e Albardão-Chuí, AC (RS, 34º 40' S) durante dois cruzeiros oceanográficos: inverno de 2005 e verão de 2007. Amostras de plâncton foram coletadas através de arrastos verticais com rede de plâncton (20 μm), preservadas com formalina 4% e analisadas ao microscópio invertido equipado com câmara digital. Quando necessário, a identificação de espécies de Peridiniales foi efetuada através do número e morfologia das placas da teca realçadas com Calco Flúor Branco MR2; espécies de Prorocentrales foram identificadas com base em seu tamanho, forma, presença de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversidade; Dinophyceae; Prorocentrum; Protoperidinium; Atlântico Sudoeste.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300012

REVISIÓN DE LOS TAXONES DEL GÉNERO NEOCERATIUM F. GÓMEZ, D. MOREIRA ET P. LÓPEZGARCÍA (DINOPHYCEAE) Y PRIMER REGISTRO DE N. DENS EN EL MAR CARIBE COLOMBIANO
Provedor de dados: 50
Autores: Vidal,Luis Alfonso; Lozano-Duque,Yesid.
Se presenta una síntesis de los taxones del género Neoceratium hallados en un transecto a lo largo de la costa Caribe colombiana, en las bahías de Gaira y Santa Marta y en la Ciénaga Grande de Santa Marta. Con base a una extensiva revisión bibliográfica, se encontró que de los 65 taxones del género Neoceratium registrados en este estudio, 56 lo han sido ya para el mar Caribe colombiano y los nueve restantes son registros nuevos para la región. Neoceratium arietinum f. gracilentum, N. breve var. curvulum, N. humile, N. symmetricum var. coarctatum, N. longissimum y N. horridum, buceros &gt; horridum se registran por primera vez para el Caribe colombiano. Neoceratium dens, sin registros en el Atlántico y mares adyacentes, se encuentra por primera vez para...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fitoplancton; Dinophyceae; Caribe colombiano; Neoceratium dens.
Ano: 2011
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612011000100009