Abstract The introduction of exotic marine species has caused considerable economic and ecological damage around the world. Some these possess adaptations such as secondary metabolites which facilitate their successful invasion into new areas. In this study we tested two hypotheses: (i) crude extracts produced by invasive hard corals Tubastraea coccinea tagusensis, introduced to southwest Atlantic, inhibit predation generalist fish; (ii) substances found in both reduce or enhance settlement...

This study evaluated the antibacterial and antibiofilm activities of methanolic extracts from invasive corals Tubastraea coccinea tagusensis a synthesized alkaloid (APL01). The activity was by macrodilution microdilution methods using 16 bacterial strains. in Staphylococcus aureus biofilm inhibition assay. cytotoxic potential also analyzed human carcinoma cell lines HEp-2 Caco-2. All samples were capable interfering with growth strains, highlighted extract T. coccinea, which inhibited...

Abstract Antifouling chemical defense is likely an evolutionary response to the ecological disadvantages of epibiosis, particularly for photosynthetic organisms. Seaweed natural products with antifouling activity can provide effective, environmentally friendly alternatives currently used paint booster biocides. The aim this work was assess potential from Brazilian littoral seaweeds. Crude organic extracts 51 populations comprising 42 species macroalgae eight locations along coast were tested...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDolastane and Secodolastane Diterpenes from the Marine Brown Alga, Dictyota cericornisValéria Laneuville Teixeira, Therezinha Tomassini, Beatriz Grosso Fleury, Alphonse KelecomCite this: J. Nat. Prod. 1986, 49, 4, 570–575Publication Date (Print):July 1, 1986Publication History Published online1 July 2004Published inissue 1 1986https://pubs.acs.org/doi/10.1021/np50046a002https://doi.org/10.1021/np50046a002research-articleACS PublicationsRequest...

The scleractinian corals Tubastraea coccinea Lesson, 1829 and tagusensis Wells, 1882 are the first alien to be introduced into South Atlantic threaten native marine organisms due their noxious attributes. This study aimed determine spatial distribution relative abundance of these species throughout Tamoios Ecological Station Marine Protected Area (MPA). Monitoring was carried out at 33 sites by two snorkel divers swimming parallel shore observing substrate, diagnosing visually estimating...

Abstract The nature of the pigments in octocorals has been investigated by Raman spectroscopy, where laser excitation at 632.8 and 1064 nm were used to characterize colored components present skeleton exotic pink‐yellow soft coral Chromonephthea braziliensis , reddish purple sea fan Leptogorgia punicea endemic deep violet red violacea from southeastern coast Brazil. observed positions two major bands ca 1500 cm −1 [ν(CC)] 1130 [ν(CC)] for all specimens strongly suggest presence a mixtureof...

Defensive chemistry may be used against consumers and competitors by invasive species as a strategy for colonization perpetuation in new area. There are relatively few studies of negative chemical interactions between scleratinian corals. This study characterizes the secondary metabolites corals Tubastraea tagusensis T. coccinea relates these to an situ experiment using submersible apparatus with Sep-Paks® cartridges trap substances released directly from sea-water. Colonies spp were...

Polyenic pigments in octocorals have been investigated by Raman spectroscopy using laser excitation at 532, 785 and 1064 nm. The spectral features suggest the structural nature of carotenoids from Phyllogorgia dilatata , Leptogorgia punicea Muricea atlantica Carijoa riisei conjugated polyenals L. punicea, setacea, flamma Renilla muelleri . observed vibrational bands ca 1540–1520 ν 1 (C=C), 1159 2 (C–C) 1005 cm −1 ρ 3 (C–CH ) were assigned to carotenoids, whereas identification non‐methylated...

Abstract Phyllogorgia dilatata is a Brazilian endemic gorgonian with natural color ranging from white to pale yellow. An unusual violet pigmentation has been observed in colonies tissue damage and skeleton anomalies. In order investigate the chemical composition of these pigments, we have used situ Raman spectroscopy characterize white/cream tissues as well sclerites, skeletal component consisting calcite, both samples. Violet/purple surrounding necrosis characterized purpling, response...

Chemical investigation of nonindigenous Tubastraea coccinea and T. tagusensis by Raman spectroscopy resulted in the identification carotenoids indolic alkaloids. Comparison data obtained for situ crude extracts has shown potential technique characterizing samples which are metabolic fingerprints, means band analysis. bands at ca. 1520, 1160, 1005 cm–1 assigned to ν1(C═C), ν2(C—C), ρ3(C—CH3) modes were attributed astaxanthin, 1665 could be ν(C—N), ν(C—O), ν(C—C) coupled mode...

Abstract Sex‐specific interactions involving competition for space between the dioecious alcyonacean soft coral Sarcophyton glaucum and scleractinian Acropora robusta were assessed experimentally on Bald Rock, central region of Great Barrier Reef. To examine this, plus inter‐clonal responses, one male colony S. , known to produce sarcophytoxide as its predominant complementary (secondary) metabolite, was sectioned, producing 10 clones. The same done a female colony. These two sets clones...

Photosynthetic performance of distinct marine macroalgae, Ulva fasciata Delile (green alga), Lobophora variegata (J. V. Lamouroux) Womersley ex E. C. Oliveira (brown and Plocamium brasiliensis (Greville) M. A. Howe & W. R. Taylor (red were compared using a pulse amplitude-modulated fluorometer. The maximum quantum yield (Fv/Fm) ranged from 0.80 to 0.51, the lowest value was found in P. brasiliensis. Under 400 µmol photons m-2 s-1 irradiance, highest photochemical quenching (qP = 0.92 ± 0.13)...