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| Registros recuperados: 49 | |
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| Kondajii, N; Menon, N. |
| It is understood that the rate of bioaccumulation and subsequent depuration of heavy metals in marine animals is influenced by the chemical state, as well as the kinetics of transformation between different species of chemical salts dissolved in water. The Indian Brown mussel, Perna indica, was exposed to copper nitrate and chloride, individually, to analyse the rate of accumulation, depuration, oxygen uptake and filtration rates. When supplied in very low quantities, environmentally realistic concentrations, the rate of accumulation of copper nitrate and chlorides showed variations. When the animals were transferred to sea water, these two salts did not show any clear cut differences in the depuration rate. Irrespective of the previous accumulation... |
| Tipo: Text |
Palavras-chave: Perna indica; Bivalvia; Chlorides; Copper; Mussel culture; Heavy metals; Marine pollution; Accumulation; Self purification. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1603.pdf |
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| Faur, Florian; Saini, Camille; Potter, Gael; Galgani, Francois; De Alencastro, Luiz Felippe; Hagmann, Pascal. |
| This study examines the distribution, abundance and characteristics of surface micro- and mesoplastic debris in the Western Mediterranean Sea. 41 samples were collected in 2011 (summer) and 2012 (summer). Results, firstly, revealed that micro- (<5mm) and mesoplastic debris were widely and uniformly distributed in this area with average concentrations of 130,000 parts/km(2) and 5700 parts/km(2), respectively. Importantly, a strong correlation between micro- and mesoplastic concentrations was identified. Secondly, a classification based on the shape and appearance of microplastics indicated the predominant presence of fragments (73 %) followed by thin films (14 %). Thirdly, the average mass ratio of microplastic to dry organic matter has been measured at... |
| Tipo: Text |
Palavras-chave: Plastic debris; Marine pollution; Mediterranean Sea; Surface net tow; Microplastic pollution; Neustonic plastic. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00275/38629/37311.pdf |
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| Tibiriçá, Carlos Eduardo J. A.; Leite, Isabel P.; Batista, Talita V. V.; Fernandes, Luciano F.; Chomérat, Nicolas; Herve, Fabienne; Hess, Philipp; Mafra, Luiz. |
| Ostreopsis cf. ovata is a toxic marine benthic dinoflagellate responsible for harmful blooms affecting ecosystem and human health, mostly in the Mediterranean Sea. In this study we report the occurrence of a summer O. cf. ovata bloom in Currais, a coastal archipelago located on the subtropical Brazilian coast (~25° S). This bloom was very similar to Mediterranean episodes in many aspects: (a) field-sampled and cultivated O. cf. ovata cells aligned phylogenetically (ITS and LSU regions) along with Mediterranean strains; (b) the bloom occurred at increasing temperature and irradiance, and decreasing wind speed; (c) cell densities reached up to 8.0 × 104 cell cm−2 on fiberglass screen and 5.6 × 105 cell g−1 fresh weight on seaweeds; (d) and toxin profiles... |
| Tipo: Text |
Palavras-chave: Harmful algal bloom; Benthic microalgae; Toxic dinoflagellates; Ovatoxin; Toxin transfer; Seafood safety; Marine pollution; Plastic litter; Biofilm formation. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00509/62037/66177.pdf |
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| Mandic, Jelena; Pavela Vrancic, Maja. |
| A total of 208 polycyclic aromatic compounds and their substituted homologues were investigated on eight stations along Croatia-Italy transect in the Middle Adriatic. PAC concentrations were higher in the coastal area than in the open sea area. The highest PAC concentrations were measured in the vicinity of the industrial harbor of Split while the lowest concentrations were observed on stations located in the open sea area. Polycyclic aromatic hydrocarbons were dominant group of compounds on each investigated station with contributions in total PAC concentration of more than 85%. S-PAH concentrations were higher than O-PAH concentration in each sample and tend to decrease as the distance from the coast increased. Contributions of O-PAH in total PAC... |
| Tipo: Text |
Palavras-chave: Polycyclic aromatic compounds; PAH; Sediments; Diagnostic ratios; Marine pollution; Adriatic Sea. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00395/50607/51319.pdf |
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| Imzilen, Taha; Lett, Christophe; Chassot, Emmanuel; Kaplan, David. |
| Debris from fisheries pose significant threats to coastal marine ecosystems worldwide. Tropical tuna purse seine fisheries contribute to this problem via the construction and deployment of thousands of human-made drifting fish aggregating devices (dFADs) annually, many of which end up beaching in coastal areas. Here, we analyzed approximately 40,000 dFAD trajectories in the Indian Ocean and 12,000 dFAD trajectories in the Atlantic Ocean deployed over the decade 2008–2017 to identify where and when beachings occur. We find that there is tremendous promise for reducing beaching events by prohibiting deployments in areas most likely to lead to a beaching. For example, our results indicate that 21% to 40% (depending on effort redistribution after closure) of... |
| Tipo: Text |
Palavras-chave: Marine pollution; Fishing debris; Coral reefs; Fish aggregating device (FAD); Ocean currents. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00669/78060/80807.pdf |
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| Laubier, Lucien; Le Moigne, Morgan; Flammarion, Patrick; Thybaud, Eric; Cossa, Daniel. |
| On December 11, 1999, Erika, an oil tanker flying the Maltese flag and loaded with 31 000 t of heavy fuel oil, was making its way from Dunkirk to Livorno when it encountered difficult weather conditions Southwest of the Brittany coast gale force winds 8 to 9 and 6 mwaves). On the morning of 12th December, the captain broadcast an SOS; his vessel was breaking in two, approximately 30 nautical miles to south of Penmarc'h Point (Fig. 1; Finistère, France). The fore section of the vessel sank during the night of the 12-13 December and the aft section was taken in tow on the morning December 13, but subsequently sank in the early afternoon. Both parts lay in 120 m of water and were located 10 km apart. Approximately, 19 000 t of heavy fuel oil were spilled into... |
| Tipo: Text |
Palavras-chave: Atlantique; France; Monitoring programme; Hydrocarbon; Erika; Marine pollution; Ecotoxicology; Ecology. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-1390.pdf |
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| Registros recuperados: 49 | |
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