116 research outputs found
Cholinesterase activities as potential biomarkers: Characterization in two freshwater snails, Potamopyrgus antipodarum (Mollusca, Hydrobiidae, Smith 1889) and Valvata piscinalis (Mollusca, Valvatidae, Müller 1774)
Natural factors to consider when using acetylcholinesterase activity as neurotoxicity biomarker in Young-Of-Year striped bass (Morone saxatilis)
Marine ecosystem health status assessment through integrative biomarker indices: a comparative study after the Prestige oil spill “Mussel Watch”
Partial purification and enzymatic characterization of acetylcholinesterase from the intertidal marine copepod Tigriopus brevicornis
International audienc
Contamination of some aquatic species with the organochlorine pesticide chlordecone in Martinique
Martinique is a French overseas department whose economy relies heavily on
agriculture. Organochlorine pesticides, mainly chlordecone, were used for
banana cultivation to eradicate banana weevil over a period of 40 years.
Chlordecone is chemically stable,and has a strong affinity for fatty
tissues. It is therefore able to bioaccumulate in animals and thereby
represent a threat to ecosystems and man. Soils from banana plantations in
Martinique are heavily contaminated with chlordecone. Possible transfer of
these molecules from agricultural watersheds to the aquatic environment and
the organisms that live in it is feared. The hypothesis that ecosystems of
Martinique might be highly contaminated with this organochlorine pesticide
was investigated. Chlordecone levels were measured in various freshwater and
marine species. Data show a heavy contamination of many carnivorous and
detritivorous species (fish and prawns). Concentrations measured in wild or
farmed tilapia are among the highest ever reported in the literature. Some
coastal species (fish and lobster) were also found to be contaminated,
although to a lesser extent. Given the biogeochemical behavior of
chlordecone, the most likely route of contamination is food. Detected
concentrations in marine organisms are below the tolerated limits
established by authorities, however, the impact of other sources of
exposure, namely, contaminated water and root vegetables, remains to be
investigated
Acetylcholinesterase activity in copepods (Tigriopus brevicornis) from the Vilaine River estuary, France, as a biomarker of neurotoxic contaminants
International audienc
Mortality and LC50Values for Several Stages of the Marine CopepodTigriopus brevicornis(Müller) Exposed to the Metals Arsenic and Cadmium and the Pesticides Atrazine, Carbofuran, Dichlorvos, and Malathion
International audienc
Measurements of biomarker levels in flounder (Platichthys flesus) and blue mussel (Mytilus trossulus) from the Gulf of Gdansk (southern Baltic).
Effects of furadan in the brown mussel Perna perna and in the mangrove oyster Crassostrea rhizophorae
Link between exposure of fish (
An analytical method consisting in enzymatic deconjugation, solid phase
extraction and purification, and gas chromatography/mass spectrometry
analysis after derivatization was used in this study to quantify Polycyclic Aromatic Hydrocarbon (PAH)
metabolites in the bile of fish. The method has been applied in a laboratory
experiment studying the fate of pyrene in basin containing soles. This study
has allowed the identification of 1-hydroxypyrene as the single metabolite
in bile after enzymatic deconjugation. In a second time, 1-hydroxypyrene has
been used as a biomarker of exposure in the case of the “Erika” oil spill. This
biomonitoring was successful in demonstrating the exposure of juvenile soles
to PAHs present in the “Erika” fuel oil
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