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  1. Article ; Online: Antifouling activity of isonitrosoacetanilides against microfouling and macrofouling

    Agostini, Vanessa Ochi / Martinez, Sabrina Teixeira / Muxagata, Erik / Macedo, Alexandre José / Pinho, Grasiela Lopes Leães

    Environ Sci Pollut Res. 2023 Feb., v. 30, no. 10 p.26435-26444

    2023  

    Abstract: Biofouling is responsible for structural and economic damage to man-made surfaces. Antifouling paints with biocides have been applied to structures to avoid organism adhesion; however, they have high toxicity and are not able to prevent all biofouling ... ...

    Abstract Biofouling is responsible for structural and economic damage to man-made surfaces. Antifouling paints with biocides have been applied to structures to avoid organism adhesion; however, they have high toxicity and are not able to prevent all biofouling processes, necessitating the periodic mechanical removal of organisms and paint reapplication. Thus, there is an urgent demand for novel, effective, and environmentally friendly antifouling alternatives. As isonitrosoacetanilide is the precursor for many compounds with antibacterial activity, we believe that it could have antifouling activity against microfouling and, consequently, against macrofouling. The aim of this work was to investigate the antifouling potential of six isonitrosoacetanilide compounds and their toxicity. The compounds were employed at different concentrations (0.625–1.25–2.5–5–10 µg mL⁻¹) in this study. The biofilm and planktonic bacteria inhibition and biofilm eradication potential were evaluated by crystal violet assay, while Amphibalus amphitrite barnacle settlement was evaluated by cyprid settlement assay. Toxicity evaluation (LC₅₀ and EC₅₀) was performed with A. amphitrite nauplii II and cyprid larvae. At least one of the tested concentrations of 4-Br-INA, 4-CH₃-INA, and 2-Br-INA compounds showed nontoxic antifouling activity against microfouling (antibiofilm) and macrofouling (antisettlement). However, only 4-CH₃-INA and 2-Br-INA also showed biofilm eradication potential. These compounds with antibiofilm activity and nontoxic effects could be combined with acrylic base paint resin or added directly into commercial paints in place of toxicant biocides to cover artificial structures as friendly antifouling agents.
    Keywords adhesion ; antibacterial properties ; antifouling activities ; biocides ; biofilm ; biofouling ; gentian violet ; nauplii ; plankton ; toxicity
    Language English
    Dates of publication 2023-02
    Size p. 26435-26444.
    Publishing place Springer Berlin Heidelberg
    Document type Article ; Online
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-24016-2
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Antifouling activity of isonitrosoacetanilides against microfouling and macrofouling.

    Agostini, Vanessa Ochi / Martinez, Sabrina Teixeira / Muxagata, Erik / Macedo, Alexandre José / Pinho, Grasiela Lopes Leães

    Environmental science and pollution research international

    2022  Volume 30, Issue 10, Page(s) 26435–26444

    Abstract: Biofouling is responsible for structural and economic damage to man-made surfaces. Antifouling paints with biocides have been applied to structures to avoid organism adhesion; however, they have high toxicity and are not able to prevent all biofouling ... ...

    Abstract Biofouling is responsible for structural and economic damage to man-made surfaces. Antifouling paints with biocides have been applied to structures to avoid organism adhesion; however, they have high toxicity and are not able to prevent all biofouling processes, necessitating the periodic mechanical removal of organisms and paint reapplication. Thus, there is an urgent demand for novel, effective, and environmentally friendly antifouling alternatives. As isonitrosoacetanilide is the precursor for many compounds with antibacterial activity, we believe that it could have antifouling activity against microfouling and, consequently, against macrofouling. The aim of this work was to investigate the antifouling potential of six isonitrosoacetanilide compounds and their toxicity. The compounds were employed at different concentrations (0.625-1.25-2.5-5-10 µg mL
    MeSH term(s) Humans ; Animals ; Biofouling/prevention & control ; Biofilms ; Plankton ; Thoracica ; Disinfectants/pharmacology
    Chemical Substances Disinfectants
    Language English
    Publishing date 2022-11-11
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-022-24016-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Acartia tonsa Dana 1849 as a Model Organism: Considerations on Acclimation in Ecotoxicological Assays

    Lopes, Laís Fernanda de Palma / Agostini, Vanessa Ochi / Moreira, Raquel Aparecida / Muxagata, Erik

    Bulletin of environmental contamination and toxicology. 2021 May, v. 106, no. 5

    2021  

    Abstract: The copepod Acartia tonsa was standardized as model organism in acute toxicity bioassays due to its key position in coastal food chains and high sensitivity. Once bioassays are performed according to a protocol their results may become tools for the ... ...

    Abstract The copepod Acartia tonsa was standardized as model organism in acute toxicity bioassays due to its key position in coastal food chains and high sensitivity. Once bioassays are performed according to a protocol their results may become tools for the protection of aquatic ecosystems. However, there are divergences in bioassays methods using A. tonsa. This study aimed to investigate: (i) the need for acclimation of A. tonsa collected from the environment for use in acute toxicological bioassays; and (ii) differences in sensitivity between copepods collected from the environment and laboratory-grown copepods. Laboratory-grown copepods are more sensitive to SDS than A. tonsa from the environment. The acclimation time of 30 h helped organisms to recover from stress of collection/handling and changing environment/conditions. Therefore, laboratory-grown copepods showed to be more sensitive than organisms from environment; and for ecotoxicological bioassays acclimating A. tonsa collected from the environment for 30 h can be adopted.
    Keywords Acartia tonsa ; acclimation ; acute toxicity ; ecotoxicology ; pollution
    Language English
    Dates of publication 2021-05
    Size p. 734-739.
    Publishing place Springer US
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 6895-0
    ISSN 1432-0800 ; 0007-4861
    ISSN (online) 1432-0800
    ISSN 0007-4861
    DOI 10.1007/s00128-021-03175-x
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: On the occurrence and ecology of Glaucus atlanticus Forster, 1777 (Mollusca: Nudibranchia) along the Southwestern Atlantic coast.

    Pinotti, Raphael M / Bom, Fabio C / Muxagata, Erik

    Anais da Academia Brasileira de Ciencias

    2019  Volume 91, Issue 1, Page(s) e20180154

    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 ... ...

    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 its austral limit, by seasonal shifts in the Subtropical Convergence Zone (especially under the influence of ENSO El Niño events). Once over the shelf, seasonal wind patterns and meteorological events can force a passive displacement of the species towards the shore. Such onshore displacements may result on strandings of Glaucus spp. and other pleustonic species of the "blue plankton" community, like already reported worldwide and recently at the Southern Brazilian / Uruguayan coasts. Although fascinating, Glaucus spp. should be considered harmful to humans and people should thus avoid direct contact; if this accidentally occurs, short-term treatments can be implemented besides looking for medical attention. The current geographical distribution of Glaucus atlanticus over the Brazilian coast reveals some inaccuracy and gaps; the present study not only revises the ecology of this species but also evidences the occurrence of summer strandings and its austral distribution into subtropical shores.
    MeSH term(s) Animal Distribution/physiology ; Animals ; Argentina ; Atlantic Ocean ; Brazil ; Gastropoda/physiology ; Plankton ; Seasons ; Species Specificity ; Uruguay
    Language English
    Publishing date 2019-04-08
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2046885-4
    ISSN 1678-2690 ; 0001-3765
    ISSN (online) 1678-2690
    ISSN 0001-3765
    DOI 10.1590/0001-3765201920180154
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Euphausiacea diversity in a trans-oceanic transect through the South Atlantic Ocean: the first Atlantic record of Thysanopoda astylata Brinton, 1975.

    Muxagata, Erik / Barbosa, Carla N / Agostini, Vanessa O

    Anais da Academia Brasileira de Ciencias

    2019  Volume 91, Issue 1, Page(s) e20180034

    Abstract: Information about euphausiids in central South Atlantic Ocean is scarce; hence, we investigated species composition and distribution of euphausiids along a longitudinal transect in this region, with an emphasis on Thysanopoda. Zooplankton samples were ... ...

    Abstract Information about euphausiids in central South Atlantic Ocean is scarce; hence, we investigated species composition and distribution of euphausiids along a longitudinal transect in this region, with an emphasis on Thysanopoda. Zooplankton samples were collected from 44 stations during the first Transatlantic Commission (Brazil-Africa). Euphausiids comprised 21,390 individuals across larval stages (nauplius, calyptopis, and furcilia) and adults. Furcilia and adults were classified to species level when possible, with a total of 19 identified species. Overall, Euphausia species frequency of occurrence and abundance were highest in samples collected near the African coast, while Thysanopada species dominated near the Brazilian coast. Of the euphausiids caught, 158 were identified as Thysanopoda, including 2 specimens of T. astylata, 6 T. aequalis, 3 T. pectinata, 2 T. monacantha, 2 T. tricuspida, and 1 T. egregia; 118 damaged specimens could only be identified as Thysanopoda spp., and 24 as T. aequalis / T. astylata complex because of the lack of diagnostic structures. Thysanopada egregia was present in samples collected down to 96 m, which increases the vertical range for this species. This report constitutes the first record of Thysanopoda astylata Brinton, 1975 in Atlantic waters.
    MeSH term(s) Africa ; Animal Distribution/physiology ; Animals ; Atlantic Ocean ; Brazil ; Euphausiacea/physiology ; Population Density ; Population Dynamics ; Seasons ; Species Specificity ; Temperature ; Zooplankton/physiology
    Language English
    Publishing date 2019-04-08
    Publishing country Brazil
    Document type Journal Article
    ZDB-ID 2046885-4
    ISSN 1678-2690 ; 0001-3765
    ISSN (online) 1678-2690
    ISSN 0001-3765
    DOI 10.1590/0001-3765201920180034
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Acartia tonsa Dana 1849 as a Model Organism: Considerations on Acclimation in Ecotoxicological Assays.

    Lopes, Laís Fernanda de Palma / Agostini, Vanessa Ochi / Moreira, Raquel Aparecida / Muxagata, Erik

    Bulletin of environmental contamination and toxicology

    2021  Volume 106, Issue 5, Page(s) 734–739

    Abstract: The copepod Acartia tonsa was standardized as model organism in acute toxicity bioassays due to its key position in coastal food chains and high sensitivity. Once bioassays are performed according to a protocol their results may become tools for the ... ...

    Abstract The copepod Acartia tonsa was standardized as model organism in acute toxicity bioassays due to its key position in coastal food chains and high sensitivity. Once bioassays are performed according to a protocol their results may become tools for the protection of aquatic ecosystems. However, there are divergences in bioassays methods using A. tonsa. This study aimed to investigate: (i) the need for acclimation of A. tonsa collected from the environment for use in acute toxicological bioassays; and (ii) differences in sensitivity between copepods collected from the environment and laboratory-grown copepods. Laboratory-grown copepods are more sensitive to SDS than A. tonsa from the environment. The acclimation time of 30 h helped organisms to recover from stress of collection/handling and changing environment/conditions. Therefore, laboratory-grown copepods showed to be more sensitive than organisms from environment; and for ecotoxicological bioassays acclimating A. tonsa collected from the environment for 30 h can be adopted.
    MeSH term(s) Acclimatization ; Animals ; Biological Assay ; Copepoda ; Ecosystem ; Ecotoxicology
    Language English
    Publishing date 2021-03-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 6895-0
    ISSN 1432-0800 ; 0007-4861
    ISSN (online) 1432-0800
    ISSN 0007-4861
    DOI 10.1007/s00128-021-03175-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Inhibition of biofilm bacteria and adherent fungi from marine plankton cultures using an antimicrobial combination

    Agostini, Vanessa Ochi / Macedo, Alexandre José / Muxagata, Erik

    International aquatic research. 2018 June, v. 10, no. 2

    2018  

    Abstract: The presence of organic matter in plankton cultures will lead to 10- to 1000-fold increases in bacterial density in less than 24 h. The presence of bacteria and fungi can damage cultivated phytoplankton and zooplankton. These microorganisms can also ... ...

    Abstract The presence of organic matter in plankton cultures will lead to 10- to 1000-fold increases in bacterial density in less than 24 h. The presence of bacteria and fungi can damage cultivated phytoplankton and zooplankton. These microorganisms can also inhibit experiments investigating the role of these microorganisms in the community and in biological and ecological laboratory studies. The aim of this study was thus to evaluate the effect of penicillin + streptomycin + neomycin (antibiotics) in combination with nystatin (antifungal) to select an antimicrobial combination for the inhibition of biofilm bacteria and adherent fungi that is effective and also non-toxic to marine phytoplankton and zooplankton. Acartia tonsa was exposed to different antimicrobial treatments and application routes (culture medium, culture food, both) to evaluate the survival and egg and fecal pellet production endpoints. The same treatments were also applied to measure Amphibalanus improvisus survival and settlement and Conticribra weissflogii growth endpoints. We selected the most sensitive experimental organism and exposed it to some novel antimicrobial combinations. To evaluate the inhibition potential, biofilm bacteria and adherent fungi were exposed to the treatments that were safe for the bioindicator species. A tonsa was considered the most sensitive of all tested organisms. The treatment composed of 0.025 g L−1 penicillin G potassium + 0.08 g L−1 streptomycin sulfate + 0.04 g L−1 neomycin sulfate showed the best results for A. tonsa and C. weissflogii cultures. No differences were observed for A. improvisus between the treatments. A. tonsa survival rates showed no differences from the control at nystatin concentrations up to 0.005 g L−1 in combination with the antibiotics. The biofilm bacterial density decreased up to 94% under this treatment, and fungal growth was prevented. Species of other planktonic groups should also be tested to improve our understanding of the effectiveness of the treatments proposed.
    Keywords Acartia tonsa ; bacteria ; benzylpenicillin ; biofilm ; culture media ; eggs ; feces ; fungal growth ; fungi ; indicator species ; neomycin ; nystatin ; organic matter ; phytoplankton ; streptomycin ; sulfates ; survival rate ; zooplankton
    Language English
    Dates of publication 2018-06
    Size p. 165-177.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 2705694-6
    ISSN 2008-6970 ; 2008-4935
    ISSN (online) 2008-6970
    ISSN 2008-4935
    DOI 10.1007/s40071-018-0198-1
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Could some procedures commonly used in bioassays with the copepod Acartia tonsa Dana 1849 distort results?

    Lopes, Laís Fernanda de Palma / Agostini, Vanessa Ochi / Muxagata, Erik

    Ecotoxicology and environmental safety

    2018  Volume 150, Page(s) 353–365

    Abstract: Many organizations have suggested the use of the Calanoid copepod Acartia tonsa in protocols for acute toxicity tests. Nevertheless, these protocols present some problems, such as using 60-180µm meshes to separate specific stages of A. tonsa or carrying ... ...

    Abstract Many organizations have suggested the use of the Calanoid copepod Acartia tonsa in protocols for acute toxicity tests. Nevertheless, these protocols present some problems, such as using 60-180µm meshes to separate specific stages of A. tonsa or carrying out the tests using small volumes that reflect high densities of A. tonsa that do not occur in nature, which could lead to distorted results. In addition, ecotoxicological studies may use statistical approaches that are inadequate for the type of data being analysed. For these reasons, some methodological approaches for bioassays using A. tonsa need to be clarified and revised. In this study, we present information about (i) the retention of copepodite stages of A. tonsa on 180, 330 and 500µm net meshes; (ii) tested storage volumes of 1 organism per 5, 10 or 20mL in each test container (TC); and (iii) considerations about the statistics employed. The results demonstrated that a net mesh of 180µm is capable of retaining all copepodite stages (CI to CVI), contrasting with the recommendation of using a 180µm mesh to separate out adults only. Coarser meshes (330 and 500µm) can also retain different proportions of all copepodite stages, but cannot separate out one developmental stage only. Twenty-five millilitres of medium in an open TC, commonly employed in bioassays simulating densities of 1 organism 5mL
    MeSH term(s) Animals ; Biological Assay/methods ; Biological Assay/standards ; Brazil ; Copepoda/drug effects ; Copepoda/growth & development ; Ecotoxicology ; Environmental Monitoring/methods ; Environmental Monitoring/standards ; Salinity ; Toxicity Tests, Acute/methods ; Toxicity Tests, Acute/standards ; Water Pollutants, Chemical/toxicity
    Chemical Substances Water Pollutants, Chemical
    Language English
    Publishing date 2018-04-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2017.12.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Bacteria-invertebrate interactions as an asset in developing new antifouling coatings for man-made aquatic surfaces

    Agostini, Vanessa Ochi / Muxagata, Erik / Pinho, Grasiela Lopes Leães / Pessi, Igor Stelmach / Macedo, Alexandre José

    Environmental pollution. 2021 Feb. 15, v. 271

    2021  

    Abstract: Economic losses can result from biofouling establishment on man-made structures. Macrofouling causes damage to artificial substrates, which justifies the need for its control. However, the antifouling coatings employed nowadays are typically not safe for ...

    Abstract Economic losses can result from biofouling establishment on man-made structures. Macrofouling causes damage to artificial substrates, which justifies the need for its control. However, the antifouling coatings employed nowadays are typically not safe for the environment. Microfouling can affect macrofouling colonization, and thus represents a potential target for alternative antifouling control. From both ecological and economical points of view, information on the ecology and interactions between micro- and macrofouling are crucial to develop successful and safe control strategies, which will prevent biofouling development on man-made structures while preserving water quality and the safety of non-target organisms. This study presents a metabarcoding analysis of biofilm-associated marine bacteria (16S-rRNA-gene) and fungi (ITS-region), with the aim to understand invertebrate settlement over time on hard substrates exposed to natural condition (Control) and two treatments (Antimicrobials and Antifouling Painted). Biofouling composition changed with exposure time (up to 12 days) and showed differences among Control and Antimicrobials and Painted treatments. Antimicrobial treatment influenced more the biofouling composition than traditional antifouling paint (Cu₂O-based). Both treatments caused microbial resistance. Macrofouling establishment was strongly influenced by Gram-negative heterotrophic bacteria (mostly Proteobacteria and Bacteroidetes). Nevertheless, each macrofouling taxon settled in response to a specific biofilm bacterial composition, although other factors can also affect the biofouling community as the condition of the substrate. We suggest that proper friendly antifouling technologies should be focused on inhibiting bacterial biofilm adhesion.
    Keywords Bacteroidetes ; DNA barcoding ; Proteobacteria ; adhesion ; anti-infective agents ; antifouling agents ; assets ; biofilm ; biofouling ; exposure duration ; invertebrates ; pollution ; water quality
    Language English
    Dates of publication 2021-0215
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2020.116284
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Surface coatings select their micro and macrofouling communities differently on steel.

    Agostini, Vanessa Ochi / Macedo, Alexandre José / Muxagata, Erik / Pinho, Grasiela Lopes Leães

    Environmental pollution (Barking, Essex : 1987)

    2019  Volume 254, Issue Pt B, Page(s) 113086

    Abstract: Previous studies have shown the effect of surface coatings on biofouling; however, they did not take into account the interaction of the micro and macrofouling communities, the effect of substrate orientation and the zooplankton-zoobenthic coupling ... ...

    Abstract Previous studies have shown the effect of surface coatings on biofouling; however, they did not take into account the interaction of the micro and macrofouling communities, the effect of substrate orientation and the zooplankton-zoobenthic coupling together. Therefore, the aim of this study was to evaluate the effect of Zn- and Cu
    MeSH term(s) Bacteria/drug effects ; Bacterial Adhesion/drug effects ; Bacterial Physiological Phenomena/drug effects ; Biofilms/drug effects ; Biofouling/prevention & control ; Brazil ; Copper/chemistry ; Copper/pharmacology ; Paint/analysis ; Steel/analysis ; Zinc/chemistry ; Zinc/pharmacology
    Chemical Substances Steel (12597-69-2) ; Copper (789U1901C5) ; Zinc (J41CSQ7QDS) ; cuprous oxide (T8BEA5064F)
    Language English
    Publishing date 2019-08-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2019.113086
    Database MEDical Literature Analysis and Retrieval System OnLINE

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