Showing papers in "Aquatic Toxicology in 2004"

TL;DR: It is concluded that the potential of alternative parasiticides, like humic acid, chlorine dioxide and Pyceze, should be explored to replace MG, and used with extreme care at suitable concentrations and at times when the temperature is low.

TL;DR: It is concluded that future integrative, multidisciplinary research is clearly needed to increase the significance and usefulness of behavioural indicators for aquatic toxicology, and aim to highlight specific areas for consideration.

TL;DR: From the present findings it can be assumed, that prolonged exposure in environmentally relevant concentrations of diclofenac leads to an impairment of the general health condition of fish.

TL;DR: Cytopathology was investigated in the liver, kidney, gills and gut of rainbow trout exposed to five different concentrations of the anti-inflammatory drug diclofenac under laboratory conditions, with the lowest observed effect concentration (LOEC) for cytological alterations in liver, liver and gills.

TL;DR: It is demonstrated that early life stages of zebrafish are sensitive to low concentrations of E2 and provides relevant data that could be used for the adaptation of existing fish early life stage test for the in vivo testing of estrogenic compounds.

TL;DR: It is suggested that TCS has high toxicity on the early life stages of medaka, and that the metabolite of TCS may be a weak estrogenic compound with the potential to induce vitellogenin in male medaka but with no adverse effect on reproductive success and offspring.

TL;DR: The term 'ecotoxicogenomics' is proposed to describe the integration of genomics (transcriptomics, proteomics and metabolomics) into ecotoxicology, which may provide a better mechanistic understanding of aquatic ecot toxicology.

TL;DR: Promotion of ABA synthesis in Lemna by the two antibiotics and by copper suggests that the plant hormone could be a suitable (additional) indicator for future evaluation of phytotoxicity that results in plant senescence.

TL;DR: Experimental results showed the suitability of in vitro assays for screening purposes with qualitative assessment of estrogenicity, but point to the need of in vivo tests for an accurate hazard assessment for wildlife.

TL;DR: The results suggest that both AChE and CbE enzymes are involved in determining toxicity of Daphnia to the studied chemicals and that A cholinesterase inhibition levels higher than 50% can be considered of environmental concern to Daphnian species.

TL;DR: Results illustrate how a suite of biomarkers applied to different sentinel species can provide a 'diagnosis of stress', whereby, effects at the molecular level can be used to interpret the level of physiological impairment of the organism.

TL;DR: Evidence is provided that exogenous compounds interfering with the P450arom system are able to disrupt, even persistently, gonadal sex differentiation of the protogynic zebrafish.

TL;DR: Findings suggest an initial counteractive response of mussels toward the enhanced prooxidant challenge, while antioxidants appeared overwhelmed at longer exposure periods in an industrialised harbour of north-west Italy.

TL;DR: Investigation of formation of the glutathione-conjugate, activation of glutathion S-transferases and the elevation of several antioxidant enzymes giving evidence for the promotion of oxidative stress by microcystins finds evidence for oxidative stress in the aquatic plant.

TL;DR: It is suggested that multiple classes of EDC may potentially perturb developmental and reproductive physiology in fish through differential transcriptional modulation of the CYP19 genes with the most evident disruption in neural tissue.

TL;DR: The patterns of effect of carbofuran on intermediary metabolism suggest avenues to determine the mechanisms by which such effects occur.

TL;DR: The usefulness of Cu/Zn-superoxide dismutase expression pattern as a biomarker of exposure to environmental stress rather than measurement of total activity of the enzyme is pointed out in field studies using Mytilus edulis and underlines the advantages of selecting a battery of biomarkers for evaluating the impact of contamination on marine organisms.

TL;DR: Effects of atrazine on plasma androgen concentrations (androgen dynamics) and tissue (plasma and gonad) estrogen concentrations in male goldfish were dose- and time-related.

TL;DR: Exposing two frog species to a mixture of pesticides indicates that agricultural pesticides can alter some aspects of the immune response in frogs and could contribute to their global decline by rendering them more susceptible to certain infections.

TL;DR: The herbicides Irgarol 1051 and Diuron are commonly incorporated into antifouling paints to boost the efficacy of the compound towards algae and have been shown to occur together in concentrations above 0.5 microg/l, suggesting that seagrasses may be experiencing reduced photosynthetic efficiency and growth as a result.

TL;DR: The microcosm data suggest that at an ecological effect size of >20%, biologically significant risks are low for L. gibba and M. sibiricum exposed to similar mixtures of pharmaceutical compounds, which is below the threshold value of 1 for chronic risks.

TL;DR: The immune function and well being of the mussels was significantly impacted in the absence of measurable inhibition of haemolymph AChE, as well as other biomarkers of cellular integrity, immunotoxicity and physiological status.

TL;DR: The chronic toxicity of dietary zinc to Daphnia magna was investigated and the data suggest that dietary zinc specifically targets reproduction in D. magna through accumulation in particular target sites, possibly cells or tissues where vitellogenin synthesis or processing occur.

TL;DR: There is a need for further studies of long-term, low-dose effects of these two widely used flame retardants, HBCDD and TBBPA, in juvenile rainbow trout and feral eelpout.

TL;DR: The results indicate that environmentally realistic exposure concentrations of this widely used insecticide can have a significant effect on the survival and reproduction of Gammarus pulex.

TL;DR: It was observed that T. rendalli is able to accumulate microcystins and the availability of other feeding sources, besides toxic cells, probably interferes with the accumulation rate, and the occurrence of toxic cyanobacterial blooms produncing MCYSTs in aquaculture ponds could represent a risk to the quality of fish to the consumers.

TL;DR: It is suggested that DNA strand breakage and micronucleus formation in mussel haemocytes can potentially be used as convenient biomarkers of exposure to genotoxicants in the marine environment.

TL;DR: The data suggests that exposure of salmon smolts to atrazine in fresh water may compromise their physiological capabilities to survive in saline conditions.

TL;DR: The results confirmed that the immune system of M. edulis is susceptible to copper at relatively low concentrations, and the effects of copper alter with environmental variables, including temperature and the presence of a potential pathogen.

TL;DR: Investigation of the freshwater zebra mussel after exposure to tertiary treated effluent from a municipal sewage treatment works indicates that it is a suitable bioindicator of endocrine disruption in freshwater environments.