Cnidarians
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. On the occurrence and ecology of Glaucus atlanticus Forster, 1777 (Mollusca: Nudibranchia) along the Southwestern Atlantic coast
Abstract: Unlike the majority of the nudibranchs, Glaucidae lives adrift at the sea surface within Tropical and Subtropical ocean basins, feeding on cnidarians or using them to attach their egg strings as a reproductive strategy. The latitudinal distribution of Glaucus atlanticus throughout the Brazilian Province is influenced by the Brazil current and, in i
An. Acad. Bras. Ciênc.. Publicado em: 08/04/2019
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2. Cnidom variation through distinct developmental stages in the sea anemone Aulactinia marplatensis (Zamponi, 1977) (Cnidaria: Actiniaria)
The cnidae are the exclusive diagnostic structures of phylum Cnidaria. The inventory of all cnidae types of a particular species is called the cnidom. The study of cnidae has been widely addressed in all classes of cnidarians. Particularly in the order Actiniaria (sea anemones), the study of the composition, size and distribution of cnidae is essential to th
An. Acad. Bras. Ciênc.. Publicado em: 21/03/2019
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3. Pharmacological characterization of cnidarian extracts from the Caribbean Sea: evaluation of anti-snake venom and antitumor properties
Abstract Background: Cnidarians produce toxins, which are composed of different polypeptides that induce pharmacological effects of biotechnological interest, such as antitumor, antiophidic and anti-clotting activities. This study aimed to evaluate toxicological activities and potential as antitumor and antiophidic agents contained in total extracts from fi
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 21/09/2018
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4. Composition and biological activities of the aqueous extracts of three scleractinian corals from the Mexican Caribbean: Pseudodiploria strigosa, Porites astreoides and Siderastrea siderea
Abstract Background: Scleractinian corals (stony corals) are the most abundant reef-forming cnidarians found in coral reefs throughout the world. Despite their abundance and ecological importance, information about the diversity of their toxins and their biological activities is very scarce. In this study, the chemical composition and the biological activit
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 19/12/2016
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5. Amphidinolide P from the Brazilian octocoral Stragulum bicolor
Abstract Dinoflagellates are an important source of unique bioactive secondary metabolites. Symbiotic species, commonly named zooxanthellae, transfer most of their photosynthetically fixed carbon to their host. The mutualistic relationship provides the organic metabolites used for energy production but there are very few reports of the role of the dinoflagel
Rev. bras. farmacogn.. Publicado em: 2015-12
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6. An outbreak of Portuguese man-of-war (Physalia physalis - Linnaeus, 1758) envenoming in Southeastern Brazil
Introduction Portuguese man-of-war, Physalia physalis (Linnaeus, 1758), are cnidarians capable of discharging intracellular organelles filled with venom, resulting in severe envenomation in humans. Methods We report the clinical and therapeutic aspects of 331 accidents involving Portuguese man-of-war in an outbreak on the coast of the State of São Paulo,
Rev. Soc. Bras. Med. Trop.. Publicado em: 12/07/2013
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7. Assessment of biomedical and pharmacological activities of sea anemones Stichodactyla mertensii and Stichodactyla gigantea from Gulf of Mannar Biosphere Reserve, southeast coast of India
Cnidarians comprise an old and diverse animal phylum, and possess a wide variety of biologically active substances. Sea anemones contain a diversity of interesting biologically active compounds including some potent toxins. In the present work, the sea anemones Stichodactyla mertensii and Stichodactyla gigantea, collected from the Mandapam coast, are charact
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2012
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8. Taxonomia de pracriontes isolados de cnidários de São Sebastião, SP, Brasil / Taxonomy of prokaryontes isolated from cnidarians of São Sebastião, SP, Brasil
Microorganisms have a key role in the health of cnidarians establishing ecologic relationships, of parasitism to mutualism. The knowledge on the diversity of prokaryotes associated with corals in Brazil is very limited. This is the first study on the taxonomic characterization of heterotrophic bacteria, including putative N2-fixing and specially vibrios isol
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/04/2010
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9. Hemolytic toxin from the soft coral Sarcophyton trocheliophorum: isolation and physiological characterization
The unifying characteristic of cnidarians is the production of protein and polypeptide toxins. The present study describes the identification of a hemolytic toxin from the soft coral Sarcophyton trocheliophorum. The crude extract was highly cytotoxic (EC50 = 50 ng/mL) against human erythrocytes. It was also tested for hemolytic activity by the blood agar pla
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 05/02/2010
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10. Study of polycyclic aromatic hydrocarbon (PAH) degradation and antimicrobial production by marine invertebrate derived fungi. / Estudo da degradação de hidrocarbonetos policíclicos aromáticas (HPAs) e da produção de antimicrobianos por fungos filamentosos isolados de invertebrados marinhos.
Seventy three fungi representatives of distinct taxonomic groups, isolated from cnidarians collected from north coast of São Paulo State, were submitted to RBBR dye decolorization tests and to MIC. Thirteen fungal selected from the decolorization test were submitted to pyrene and benzo[a]pyrene degradation assays. Seven fungi showed satisfactory PAH degrada
Publicado em: 2008
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11. As associações epizóicas de Hydrozoa (Cnidaria: Leptothecata, Anthoathecata e Limnomedusae): I) Estudo faunístico de hidrozoários epizóicos e seus organismos associados; II) Dinâmica de comunidades bentônicas em substratos artificiais em São Sebastião, SP. / The epizoic associations within Hydrozoa (Cnidária: Leptothecata, Anthoatehcata and Limnomedusae): I) Faunistic study of the epizoic hydrozoans and their associated organisms; II) The dinamics of benthic communities on artificial substrates from São Sebastião, SP.
2.1 The associations between animal groups and species of sponges are relatively well known and described in the literature. Of all the cnidarian groups, the most diverse associations with sponges are found among the hydrozoans. In this study, 117 species of epizoic hydroids were found on two classes of sponge substrates (Hexactinellida and Demospongiae). Th
Publicado em: 2007
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12. Ecologia alimentar de Hermodice carunculata (Pallas, 1776) (Polychaeta- Amphinomidae) em bancos de Carijoa riisei (Duchassaing &Michelotti, 1860)(Anthozoa- Clavuralidae)
Hermodice carunculata is considered an important predator of Cnidarians; feeding on Zoanthids, anemones, gorgonians, hydrocorals and stone corals (Scleractineans). Predation is an important agent on structuring of communities, increasing or a lowering the diversity. The goals of this work were to identify the diet of H. carunculata in coral reefs of Carijoa
Publicado em: 2007