II 2ª Ed 2ª Ed Biologia Marinha Biologia Marinha Biologia Marinha 4th Ed 12ª Ed .. da Conceição 3 Renato Crespo Pereira e Abílio Soares-Gomes 3 Eugene P. .. Dados e Factos III Seminário de Investigação Livro de Comunicações Ética. Valéria Laneuville Teixeirab, Renato Crespo Pereirab, Éverson Miguel Biancoc, Departamento de Biologia Marinha, Instituto de Biologia, Universidade .. RESENHA_ Livro _O Corcunda de Notre-Dame_ – Victor Hugo ~ Seis Milênios. Valéria Laneuville TeixeiraI, III; Renato Crespo Pereira. IUniversidade Federal Fluminense Instituto de Biologia, Departamento de Biologia Marinha (Outeiro.

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Either the variation in action or the multiple ecological roles of the extracts indicates that different types of compounds can be associated to the defensive system produced by H. Isolation, purification, characterization and glycan-binding profile of a d -galactoside specific lectin from the marine sponge, Halichondria okadai.

Each container was placed into a large aquarium system ca. Livfo roles of natural products from the marine sponge Geodia corticostylifera. Aggregation of sponge cells: On the other hand, both n -hexane and ethyl acetate extracts were effective as chemical defenses against this hermit crab during all experimental time, probably given to its low dissolution in seawater.

Chemical profile of adults and buds of the chemically defended marine sponge Tethya maza

Geographic variation in camouflage specialization by a decorator crab. The chemical defense of four Mediterranean nudibranchs.

Chemical warfare on coral reefs: The chemical ecology of holoplankton and meroplankton. Broadly distributed among sponge species, the steroidal compounds may also be used in a defensive context. Organisms and Collection Site. Curiously, in experiments with sea stars, H.

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Antifouling activity of twelve Brazilian marine sponges. Chemical defenses of three Glossodoris nudibranchs and their dietary Hyrtios sponges. Marine compounds with antibacterial, anticoagulant, antifungal, anthelmitic, anti-inflammatory, antiprotozoal, and antiviral activities; affecting the cardiovascular, endocrine, immune and nervous systems and other miscellaneous mechanisms of action.


Statistical Treatment Normality bioloogia verified using Kolmogorov-Smirnov test. In fish assays, only biologis medium polarity extract, obtained with extraction using ethyl acetate was effective to avoid predation by these vertebrates.

Antimicrobial potential of sponge associated marine actinomycetes. Museu Nacional, Rio de Janeiro, pp. Crude extract of H. Livri, all samples adults and buds were frozen to be further lyophilized and extracted with acetone to obtain corresponding crude extracts. Esponjas marinhas do Estado do Rio de Janeiro: Digestibility of the sponge Chondrila nucula in the green turtle Chelonia mydas.

Today, different compounds from marine sponges are well known as being used in defense against predation Ribeiro et al. Isolated and synergistic effects of chemical and structural defenses of two species of Tethya Porifera: Chemical shifts were recorded in d ppm.

Sulfated dimeric sterols defend the Caribbean coral reef sponge Phorbas amaranthus from fish predators. Considering our results, we can conclude that H.

Defenses of ascidians and their conspicuous larvae: Comparison of antipredatory defenses of Red Sea and Caribbean sponges. The goal of this work was to investigate the defensive property of the extracts from the sponge Hymeniacidon ,arinha against the tropical predators: Assays with Calcinus tibicens and Lytechinus variegatus were based on the screen gel assay described pivro Hay et al.

We do not know if these chemicals may act together and potentiate their effects synergistic effect. Taxonomic revision of brazilian Tethya Porifera: Many of these chemicals are also known to have various ecological roles, mainly as a defense against consumers in sponges from the tropical and temperate Pacific, Mediterranean and Caribbean CIMINO et al.

The multidrug resistance-like mechanism in the marine sponge Tethya aurantium. Trophic structure patterns of Brazilian reef fishes: Rio de Janeiro, How to cite this article. In fact, both buds and adults can be submitted to the same high evolutionary selective pressures for chemical defense production.


T -test was used on dependent samples ligro evaluate all results. The artificial food consisted of 2. In fish tests, artificial food was also prepared with carrageenan, powdered squid, and distilled water, but with the use of food pellets as it was previously done in this type of assay PAWLIK et al.

The genus Hymeniacidon is widely distributed in the world.

Chemical defense of Hymeniacidon heliophila (Porifera: halichondrida) against tropical predators

In natural assemblages of generalist fishes, the individuals were offered two options control and treatment. Crabs and sea urchins were maintained in a l aquaria divided into 5 cells with 1 hermit crab in each with a constant flow of sand-filtered seawater. In the present work, sympatric approach was applied considering L. The mixture was vigorously stirred and poured on rectangular mold for pellet preparation 1.

Thus, definition about the nature of substances involved in defensive process is not possible. Each extract was separately added into an artificial food in volumetrically appropriated level based on the volume of H.

The treatment was prepared by adding 0,9 g of powdered squid and 15 ml of water to 0,4 g of carrageenan in order to yield a final volume of 20 ml and produce a similar concentration of that found in H.

Palatability of variably defended Caribbean sponge species is unrelated to predator abundance. Multiple defensive roles for triterpene glycosides from two caribbean sponges. However, among these six distinct compounds, two of them cholest-5,dienol and cholestemol-one-7 were found in crude extracts of the buds of T.